CN115986379B

CN115986379B - Planar antenna and wireless communication equipment

Info

Publication number: CN115986379B
Application number: CN202310154863.3A
Authority: CN
Inventors: 于海洋; 李岩
Original assignee: Suzhou Inspur Intelligent Technology Co Ltd
Current assignee: Suzhou Inspur Intelligent Technology Co Ltd
Priority date: 2023-02-23
Filing date: 2023-02-23
Publication date: 2023-06-06
Anticipated expiration: 2043-02-23
Also published as: CN115986379A

Abstract

The invention discloses a planar antenna and wireless communication equipment, which relates to the technical field of wireless communication, wherein the planar antenna comprises: the radiation structure is used for radiating signals outwards or receiving signals and is provided with a connecting part; the first grounding structure is connected to the lower part of the radiation structure and is provided with a first clamping part for clamping with a fixed target and a wire guide hole for allowing a wire to pass through; the first clamping part is arranged at one side of the first grounding structure, which is away from the radiation structure; the wire passes through the wire hole and is connected to the connecting part; one end of the second grounding structure is connected to the side edge of the radiation structure, and the other end of the second grounding structure is connected to the fixed target; the radiation structure, the first grounding structure and the second grounding structure are all made of conductive metal materials. The planar antenna provided by the invention does not need complicated operations such as screwing a screw, pasting conductive adhesive and the like in the installation process, so that the installation process of the planar antenna is simple and easy to carry out.

Description

Planar antenna and wireless communication equipment

Technical Field

The present invention relates to the field of wireless communication technology, and more particularly, to a planar antenna. In addition, the invention also relates to wireless communication equipment comprising the planar antenna.

Background

Along with the rapid development of the information technology industry, the number of electronic devices needing networking is rapidly increased, in the prior art, the wireless communication device adopts an omnidirectional antenna or intelligent antenna beam scanning to realize omnidirectional coverage, and the antenna is generally required to be fixed in an auxiliary manner through a second grounding structure such as conductive adhesive, a screw nut and the like in the installation process, so that the installation and fixing process of the antenna is relatively complex.

In summary, how to provide a planar antenna with convenient installation is a problem to be solved by those skilled in the art.

Disclosure of Invention

Therefore, the invention aims to provide the planar antenna, which can be directly installed in a clamping manner in the installation process, so that the complicated operations of screwing a screw and pasting conductive adhesive are avoided, and the installation process of the planar antenna is simple and easy to carry out.

It is another object of the present invention to provide a wireless communication device comprising the planar antenna described above.

In order to achieve the above object, the present invention provides the following technical solutions:

a planar antenna comprising:

the radiation structure is used for radiating signals outwards or receiving signals and is provided with a connecting part;

The first grounding structure is connected to the lower part of the radiation structure and is provided with a first clamping part for clamping with a fixed target and a wire hole for enabling a wire to pass through; the first clamping part is arranged at one side of the first grounding structure, which is away from the radiation structure; the wire passes through the wire guide and is connected to the connecting part;

one end of the second grounding structure is connected to the side edge of the radiation structure, and the other end of the second grounding structure is connected to the fixed target;

the radiation structure, the first grounding structure and the second grounding structure are all made of conductive metal materials.

Optionally, the first clamping portion includes a hook for clamping and matching with the fixed target.

Optionally, the number of the hooks is two, and the two hooks are oppositely arranged or oppositely arranged.

Optionally, the two hooks are symmetrically arranged about a middle section of the first grounding structure.

Optionally, a side of the first grounding structure facing the fixation target is provided with a groove for accommodating a wire passing through the wire guide.

Optionally, the wire guide is disposed within the groove.

Optionally, the radiation structure is a sheet structure.

Optionally, the first grounding structure is an L-shaped structure, a vertical arm of the L-shaped structure is connected with the radiation structure, and the first clamping portion is disposed on the lower surface of a horizontal arm of the L-shaped structure.

Optionally, the connection portion is a columnar structure disposed on a lower surface of the radiation structure, and the diameter of the connection portion is smaller than that of the wire guide, and the height of the connection portion is smaller than the height of the interval between the lower surface of the radiation structure and the upper surface of the horizontal arm of the first grounding structure.

Optionally, the connection portion is disposed directly above the wire guide.

Optionally, the radiation structure is provided with a low-frequency slot and a high-frequency slot, and the opening of the low-frequency slot and the opening of the high-frequency slot are respectively arranged on two adjacent sides of the radiation structure.

Optionally, the radiation structure is a rectangular structure, and the low-frequency slot and the high-frequency slot are rectangular slots.

Optionally, the second grounding structure includes a main body portion and a second clamping portion, and the second clamping portion is disposed at one end of the main body portion away from the radiation structure, the main body portion is connected with the radiation structure, the second clamping portion is used for being connected with the fixed target clamp, and the main body portion is connected to one side of the radiation structure opposite to the opening of the high-frequency slot.

Optionally, the second clamping portion is a bend disposed on the main body portion.

Optionally, the extending direction of the bending is perpendicular to the extending direction of the main body portion.

Optionally, the thickness of the second grounding structure is the same as the thickness of the radiation structure, the top end of the second grounding structure is flush with the upper surface of the radiation structure, and the bottom end of the second grounding structure is flush with the lower surface of the first grounding structure, where the first clamping portion is arranged.

Optionally, the radiation structure, the first grounding structure and the second grounding structure are all made of copper materials.

A wireless communication device, comprising a fixed target and any one of the above planar antennas, wherein the fixed target is provided with a first clamping groove for being clamped or released by matching with the first clamping part, and a signal receiving and transmitting module for being connected with the wire.

The second grounding structure comprises a main body part and a second clamping part, wherein the fixed target is provided with a first clamping groove for being matched with the first clamping part to be clamped or released, a signal receiving and transmitting module for being connected with the lead and a second clamping groove for being matched with the second clamping part to be clamped or released.

Optionally, the extending direction of the first clamping groove is perpendicular to the extending direction of the second clamping groove.

In the process of using the planar antenna provided by the invention, when the planar antenna is mounted to a fixed target, the first clamping part is clamped with the fixed target, and the wire penetrates through the wire guide to be connected with the connecting part, so that the planar antenna is fixedly mounted.

When a signal is required to be sent to the outside, the signal receiving and transmitting module connected with the lead sends out the signal, the signal is transmitted to the radiation structure through the lead and the connecting part, and the radiation structure radiates the signal outwards; when the radiation structure receives signals sent by the outside, the signals are transmitted to the lead through the radiation structure and the connecting part and are transmitted to the signal receiving and transmitting module through the lead.

Compared with the prior art, the planar antenna provided by the invention does not need complicated operations such as screwing a screw, pasting conductive adhesive and the like in the installation process, so that the installation process of the planar antenna is simple and easy to carry out.

In addition, the invention also provides communication equipment comprising the planar antenna.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a diagram illustrating an axial structure of a planar antenna according to an embodiment of the present invention;

fig. 2 is a front view of the planar antenna of fig. 1;

fig. 3 is a side view of the planar antenna of fig. 1;

fig. 4 is a top view of the radiating structure of the planar antenna of fig. 1;

fig. 5 is a side view of the radiating structure of the planar antenna of fig. 1;

FIG. 6 is a side view of the radiating structure of FIG. 1 with a connection mounted;

FIG. 7 is a bottom view of the radiating structure of FIG. 1 with the connection mounted;

FIG. 8 is a side view of a second ground structure;

FIG. 9 is a front view of a second ground structure;

FIG. 10 is a front view of the first ground structure;

FIG. 11 is an enlarged view of a portion of the first grounding structure of FIG. 10;

FIG. 12 is a top view of the first grounding structure of FIG. 10;

FIG. 13 is a top view of a fixation target;

FIG. 14 is a side view of a fixation target;

fig. 15 is a schematic structural view of the planar antenna of fig. 1 after being mounted on the fixed target of fig. 13;

FIG. 16 is a simulation diagram of the antenna impedance S11 parameters of the planar antenna according to the embodiment shown in Table 1;

fig. 17 is a schematic diagram illustrating the simulation of the operation efficiency of the planar antenna according to the embodiment shown in table 1.

In fig. 1-17:

1 is a radiation structure, 11 is a connecting part, 12 is a low-frequency slot, 13 is a high-frequency slot, 2 is a first grounding structure, 21 is a first clamping part, 22 is a wire guide, 23 is a groove, 24 is a first mounting part, 25 is a second mounting part, 3 is a second grounding structure, 31 is a main body part, 32 is a second clamping part, 4 is a radio frequency wire, 5 is a fixed target, 51 is a first clamping groove, and 52 is a second clamping groove.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The core of the invention is to provide a planar antenna, which can be directly installed in a clamping manner in the installation process, so that the complicated operations of screwing a screw and pasting conductive adhesive are avoided, and the installation process of the planar antenna is simple and easy to carry out.

Another core of the present invention is to provide a wireless communication device comprising the planar antenna described above.

Please refer to fig. 1 to 17.

The embodiment discloses a planar antenna, including: a radiation structure 1 for radiating or receiving a signal outwardly, the radiation structure 1 being provided with a connection portion 11; a first grounding structure 2, the first grounding structure 2 being connected to a lower portion of the radiation structure 1, and the first grounding structure 2 being provided with a first clamping portion 21 for clamping with the fixed target 5 and a wire guide hole 22 for passing a wire therethrough; the first clamping part 21 is arranged at one side of the first grounding structure 2, which is away from the radiation structure 1; the wire is connected to the connection portion 11 through the wire guide 22; a second grounding structure 3, one end of which is connected to the side edge of the radiation structure 1, and the other end of which is connected to the fixed target 5; the radiation structure 1, the first grounding structure 2 and the second grounding structure 3 are all made of conductive metal materials.

In the process of using the planar antenna provided in this embodiment, when the planar antenna is mounted to the fixed target 5, the first clamping portion 21 is only required to be clamped with the fixed target 5, and the wire is connected to the connection portion 11 through the wire guide 22, so as to realize the fixed mounting of the planar antenna.

When a signal is required to be sent to the outside, a signal receiving and transmitting module connected with the lead sends out the signal, the signal is transmitted to the radiation structure 1 through the lead and the connecting part 11, and the radiation structure 1 radiates the signal outwards; when the radiation structure 1 receives the signal sent by the outside, the signal is transmitted to the wire through the radiation structure 1 and the connection part 11, and is transmitted to the signal receiving and transmitting module through the wire.

Compared with the prior art, the planar antenna provided by the embodiment does not need complicated operations such as screwing a screw, pasting conductive adhesive and the like in the installation process, so that the installation process of the planar antenna is simple and easy to carry out.

In a specific embodiment, the first clamping portion 21 includes a hook for cooperating with the fixed target 5, and may be clamped with the fixed target 5 by the hook during a specific use process.

The pothook sets up in the one side that first ground connection structure 2 deviates from radiation structure 1 to the pothook extends to the one side that keeps away from radiation structure 1, and as shown in fig. 11, the pothook includes the extension that is connected with the one side that deviates from radiation structure 1 of first ground connection structure 2 and the bending portion of bending to one side by the tip of extension, in the in-process of specifically using, in bending portion can block locates fixed target 5, in order to realize planar antenna's fixed.

Further, the number of hooks can be two, and the two hooks are opposite or opposite; the opposite or opposite arrangement of the two hooks means that the bending directions of the bending parts of the hooks are opposite or opposite, and in the specific use process, the two hooks can be clamped with the fixed target 5 at the same time.

After the two hooks are clamped with the fixed target 5, when the two hooks are oppositely arranged, as shown in fig. 10, when the first grounding structure 2 is moved to the right side, the bending part of the hook at the left side of the first grounding structure 2 is clamped with the fixed target 5 under the influence of the hook at the left side, and the bending part of the hook at the left side moves into the fixed target 5, so that the first grounding structure 2 is not easy to break away; when the first grounding structure 2 is moved to the left, the right hook of the first grounding structure 2 is clamped with the fixed target 5 under the influence of the right hook, and the bending part of the right hook moves into the fixed target 5, so that the first grounding structure 2 is not easy to break away.

When the two hooks are arranged in a back-to-back manner, the bent part of the hook on the right side of the first grounding structure 2 is clamped with the fixed target 5 under the influence of the hook on the right side when the first grounding structure 2 is moved to the right side, and the bent part of the hook on the right side moves into the fixed target 5, so that the first grounding structure 2 is not easy to fall off; when the first grounding structure 2 is moved to the left, the left hook of the first grounding structure 2 is clamped with the fixed target 5 under the influence of the left hook, and the bending part of the left hook moves into the fixed target 5, so that the first grounding structure 2 is not easy to break away.

As shown in fig. 11, the surface of the bent portion of the hook facing the fixed target 5 may be set to be an inclined plane or an arc surface, and in the process of connecting the first grounding structure 2 to the fixed target 5 in a clamping manner, the surface of the bent portion of the hook facing the fixed target 5 may play a certain guiding role, so that the hook is convenient to be installed in the fixed target 5, and the clamping connection is realized.

The number of the hooks can be three or more, the hooks with the same bending direction can exist in the hooks, or the hooks with opposite or opposite bending directions exist in the hooks, for example, the number of the hooks is four, the bending parts of two hooks are oppositely arranged, and the bending parts of the other two hooks are oppositely arranged; of course, the four hooks can be set into two groups, and two hooks in the two groups of hooks are set oppositely or set away from each other, or one group of hooks is set oppositely, and the other group of hooks is set away from each other, which is determined according to actual situations, and will not be described herein.

On the basis of the above embodiment, when the number of hooks is two, the two hooks may be symmetrically disposed about the middle section of the first grounding structure 2, as shown in fig. 10, and in the direction shown in fig. 10, the two hooks may be symmetrically disposed about the middle section of the direction shown in the drawing.

In this embodiment, the hooks are symmetrically arranged on the first grounding structure 2, so that the hooks can be more conveniently arranged.

In a specific embodiment, as shown in fig. 10, a side of the first grounding structure 2 facing the fixation target 5 is provided with a groove 23, the groove 23 being for accommodating a wire passing through the wire guide 22.

In particular use, the wires pass from the bottom of the first ground structure 2 through the wire guides 22 to the connection 11 of the radiating structure 1, the presence of the grooves 23 being able to accommodate the wires.

The groove 23 can be a rectangular groove, and the lead can be freely bent and placed in the groove 23; the groove 23 can also be set to be an arc groove matched with the wire, the wire can be clamped in the groove 23, and the groove 23 can also fix the wire while accommodating the wire.

As shown in fig. 10, the groove 23 is disposed at a middle position of the first grounding structure 2 in the illustrated length direction, two hooks are respectively disposed at two sides of the groove 23, and bending directions of the hooks face the groove 23; in the actual setting process, the bending direction of the hook may deviate from the groove 23 or the bending portion of the hook may be other bending directions, which is specifically determined according to the actual situation, and will not be described herein.

In one embodiment, the wire guide 22 may be disposed in the groove 23, and in actual use, the portion of the wire extending out of the wire guide 22 may directly enter the groove 23, avoiding the formation of other slots.

In the specific setting process, the wire guide 22 may be located at one side of the groove 23, or may be located at a middle position of the groove 23, which is specifically determined according to the actual situation, and will not be described herein.

The number of the wire guide holes 22 is generally one, one end of the wire is connected to the radiation structure 1 through the connecting part 11, and the other end is connected to the signal receiving and transmitting module; when a plurality of wires are needed to be connected between the signal transceiver module and the radiation structure 1, the number of the wire holes 22 can be increased, which is specifically determined according to the actual situation and will not be described herein.

In this embodiment, the wire guide 22 is installed in the groove 23, so that the wire arrangement is convenient, the lower surface of the first grounding structure 2 can be contacted with the upper surface of the fixed target 5, and the installation stability of the first grounding structure 2 is improved.

Of course, the wire guide 22 may be disposed at a portion where the hooks are mounted in fig. 10, the portion being a mounting portion, the mounting portion including a first mounting portion 24 and a second mounting portion 25 located at two sides of the groove 23, one hook being mounted on a lower surface of the first mounting portion 24, the other hook being mounted on a lower surface of the second mounting portion 25, the thickness of the mounting portion being thicker, the lower surface of the mounting portion being required to be in contact with an upper surface of the fixing target 5 during use, in order to enhance the connection firmness between the first grounding structure 2 and the fixing target 5, when the wire guide 22 is disposed at the mounting portion, a communication groove communicating with the groove 23 may be provided at the mounting portion, and a wire extending out of the wire guide 22 enters the groove 23 through the communication groove, preferably, the depth of the communication groove is greater than the diameter of the wire, so that the wire may be completely located in the communication groove.

In a specific embodiment, the radiation structure 1 is a sheet structure, the first grounding structure 2 is an L-shaped structure, a vertical arm of the L-shaped structure is connected with the radiation structure 1, and the first clamping portion 21 is disposed on a lower surface of a horizontal arm of the L-shaped structure.

As shown in fig. 3, the width of the first ground structure 2 may be made smaller than the width of the radiation structure 1 such that the front and rear sides of the first ground structure 2 have a predetermined distance from the side edges of the radiation structure 1, and preferably, the first ground structure 2 may be centrally installed to the radiation structure 1 in the direction shown in fig. 3.

In a specific use process, the first grounding structure 2 is mainly used for fixing, the planar antenna is fixed on the fixed target 5 through the first clamping portion 21, and the first grounding structure 2 can play a role of grounding.

In one embodiment, as shown in fig. 6, the connection portion 11 is a columnar structure disposed on the lower surface of the radiation structure 1, the diameter of the connection portion 11 is smaller than that of the wire guide 22, and the height of the connection portion 11 is smaller than the height of the space between the lower surface of the radiation structure 1 and the upper surface of the horizontal arm of the first grounding structure 2.

In this embodiment, the diameter of the connecting portion 11 is smaller than that of the wire guide 22, so that the wire can be conveniently connected with the connecting portion 11, the height of the connecting portion 11 is smaller than the height of the interval between the lower surface of the radiation structure 1 and the upper surface of the horizontal arm of the first grounding structure 2, a certain gap is formed between the lower surface of the connecting portion 11 and the upper surface of the horizontal arm of the first grounding structure 2, the wire can be conveniently extended out of the wire guide 22, a certain operation space is reserved for connection between the wire and the connecting portion 11, and the connection is convenient.

Preferably, the connection portion 11 may be disposed directly above the wire guide 22, and the wire may be directly connected to the connection portion 11 without bending after passing through the wire guide 22.

In a specific embodiment, the radiation structure 1 is provided with a low-frequency slot 12 and a high-frequency slot 13, and the opening of the low-frequency slot 12 and the opening of the high-frequency slot 13 are respectively arranged on two adjacent sides of the radiation structure 1.

As shown in fig. 4, the radiation structure 1 may be configured as a rectangular structure, specifically, may be a rectangular metal sheet, the low-frequency slot 12 is a slot with a length and a width from a middle part of an upper end edge of the metal sheet to a lower end, and the high-frequency slot 13 is a slot with a certain depth, which is located below the low-frequency slot 12 and has an opening located at a left edge of the rectangular metal sheet to the right.

Of course, the radiation structure 1 may be configured in other shapes, for example, when the radiation structure 1 is a regular hexagon, the opening of the low-frequency slot 12 may be disposed at the top edge of the regular hexagon, and the depth of the low-frequency slot 12 extends toward the center of the regular hexagon; the opening of the high-frequency slot 13 is positioned at the side adjacent to the top edge of the regular hexagon, and the depth of the high-frequency slot 13 extends perpendicularly to the depth of the low-frequency slot 12; of course, the radiation structure 1 may also be other polygonal shapes or irregular shapes, which are specifically determined according to practical situations, and will not be described herein. When the radiation structure 1 is a regular octagon, the opening of the low-frequency slot 12 may be disposed at the top edge of the regular octagon, and the depth of the low-frequency slot 12 extends toward the center of the regular octagon; the opening of the high frequency slot 13 is located at the side adjacent to the top edge of the regular octagon and the depth of the high frequency slot 13 extends perpendicular to the depth of the low frequency slot 12.

In this embodiment, when the low-frequency slot 12 is a slot with a length and a width from the middle of the upper edge of the metal sheet to one end below, the high-frequency slot 13 may also be a slot with a certain depth, which is located below the low-frequency slot 12 and has an opening located on the right edge of the rectangular metal sheet to the left, and the set height difference between the high-frequency slot 13 and the low-frequency slot 12 is specifically determined according to the actual situation and will not be described herein.

Specifically, the low-frequency slot 12 and the high-frequency slot 13 may be rectangular slots, and according to different practical situations, the low-frequency slot 12 and the high-frequency slot 13 may also be other shapes meeting the requirements, for example, may be arc-shaped slots, irregular slots, and other structures.

In the present embodiment, the operating frequency and radiation performance of the planar antenna can be changed by increasing or decreasing the number of the low-frequency slots 12 and the high-frequency slots 13; meanwhile, the operation frequency and radiation performance of the planar antenna can be changed by changing the sizes of the radiation structure 1, the first ground structure 2, and the second ground structure 3 in the planar antenna.

In this embodiment, the radiation structure 1 is provided with a low-frequency slot 12 and a high-frequency slot 13, the planar antenna is a dual-frequency planar antenna, and the dual-frequency planar antenna can achieve transmission matching performance with a standing wave ratio smaller than 3 at the high-frequency end and the low-frequency end, has higher radiation efficiency and gain performance, and can achieve fast and fixed installation, especially, is installed on a metal chassis structure of a desktop computer and is used for a wireless signal radiation function.

In a specific embodiment, the second grounding structure 3 includes a main body portion 31 and a second clamping portion 32, and the second clamping portion 32 is disposed at one end of the main body portion 31 away from the radiation structure 1, the main body portion 31 is connected with the radiation structure 1, the second clamping portion 32 is used for clamping connection with the fixed target 5, and the main body portion 31 is connected to a side opposite to the opening of the high-frequency slot 13 in the radiation structure 1.

As shown in fig. 3, the inner side surface of the main body 31 is connected to the radiation structure 1, and the top surface of the main body 31 is flush with the upper surface of the radiation structure 1, the second clamping portion 32 is used for being clamped and connected with the fixed target 5, and the lower surface of the second grounding structure 3 is flush with the surface of the first grounding structure 2 where the first clamping portion 21 is installed.

As shown in fig. 3, the second engagement portion 32 may be provided as a bend provided in the main body portion 31. In the use process, the second clamping part 32 can be inserted into the part matched with the second clamping part 32 in the fixed target 5 along the length direction of the main body part 31, so that the clamping and fixing of the second grounding structure 3 and the fixed target 5 are realized.

Specifically, the extending direction of the bending may be perpendicular to the extending direction of the main body 31, as shown in fig. 3, the ground clearance of the second clamping portion 32 is higher than the ground clearance of the first clamping portion 21, in the actual installation process, an installation block with a clamping groove may be fixed on the surface of the fixing target 5, and the installation block protrudes out of the surface of the fixing target 5, so that the second clamping portion 32 and the installation block are smoothly clamped.

Of course, the included angle between the extending direction of the bend in the second grounding structure 3 and the extending direction of the main body portion 31 may be an acute angle smaller than 90 ° or an obtuse angle larger than 90 °, which is specifically determined according to the actual situation, and will not be described herein.

Specifically, the thickness of the second grounding structure 3 may be the same as the thickness of the radiation structure 1, and the top end of the second grounding structure 3 is flush with the upper surface of the radiation structure 1, and the bottom end of the second grounding structure 3 is flush with the lower surface of the first grounding structure 2 where the first clamping portion 21 is disposed.

In this embodiment, the overall resonance performance of the planar antenna can be adjusted by changing the dimension of the second grounding structure 3 along the length direction of the radiation structure 1.

In this embodiment, the radiation structure 1, the first grounding structure 2 and the second grounding structure 3 may be made of copper, or the radiation structure 1, the first grounding structure 2 and the second grounding structure 3 may be made of other metal materials with higher conductivity, which is specifically determined according to practical situations.

In a specific embodiment, the radiation structure 1 is a rectangular metal sheet with a low-frequency slot 12 and a high-frequency slot 13, the low-frequency slot 12 is a rectangular slot in the middle of the upper end edge of the metal sheet, the opening of the low-frequency slot 12 is positioned at the upper edge of the rectangular metal sheet, and the depth of the low-frequency slot 12 extends downwards along the height direction of the rectangular metal sheet; specifically, as shown in fig. 4, the depth of the low-frequency slot 12 of the rectangular metal sheet is l_slot_a, the width of the low-frequency slot 12 is w_slot_a, and the low-frequency slot 12 is a rectangular slot; the high-frequency slotting 13 is a rectangular slot with an opening at the left edge of the rectangular metal sheet, the high-frequency slotting 13 is integrally positioned at the lower part of the low-frequency slotting 12, the depth of the high-frequency slotting 13 is L_slot_B, the width of the opening is W_slot_B, the high-frequency slotting 13 is a rectangular slot, the overall length of the radiation structure 1 is L_Patch, the width is W_Patch, and the radiation structure 1 adopts a metal sheet with the thickness of H_Patch. In the picture shown in fig. 4, the width w_slot_b of the high-frequency slot 13 is smaller than the width w_slot_a of the low-frequency slot 12, and of course, the width w_slot_b of the high-frequency slot 13 and the width w_slot_a of the low-frequency slot 12 may be adjusted according to different practical situations, which are specifically determined according to practical situations and will not be described herein.

The high-frequency slot 13 can be reversely arranged, specifically, the radiation structure 1 is arranged into a rectangular metal sheet with a low-frequency slot 12 and a high-frequency slot 13, the low-frequency slot 12 is a rectangular slot in the middle of the upper end edge of the metal sheet, the opening of the low-frequency slot 12 is positioned at the upper edge of the rectangular metal sheet, and the depth of the low-frequency slot 12 extends downwards along the height direction of the rectangular metal sheet; specifically, the depth of the low-frequency slot 12 of the rectangular metal sheet is l_slot_a, the width of the low-frequency slot 12 is w_slot_a, and the low-frequency slot 12 is a rectangular slot; the high-frequency slotting 13 is a rectangular slot with an opening at the right edge of the rectangular metal sheet, the high-frequency slotting 13 is integrally positioned at the lower part of the low-frequency slotting 12, the depth of the high-frequency slotting 13 is L_slot_B, the width of the opening is W_slot_B, the high-frequency slotting 13 is a rectangular slot, the overall length of the radiation structure 1 is L_Patch, the width is W_Patch, and the radiation structure 1 adopts a metal sheet with the thickness of H_Patch. The width w_slot_b of the high-frequency slot 13 is smaller than the width w_slot_a of the low-frequency slot 12, and of course, the width w_slot_b of the high-frequency slot 13 and the width w_slot_a of the low-frequency slot 12 may be adjusted according to different actual situations, which are specifically determined according to actual situations and will not be described herein.

The first grounding structure 2 is of a metal sheet structure, the first grounding structure 2 is of an L-shaped structure, as shown in FIG. 12, the overall height of the vertical arm of the first grounding structure 2 is W_gnd, and the length is L_gnd; the vertical arm is connected with the radiation structure 1, the part of the first grounding structure 2, where the first clamping part 21 is installed, is a first installation part 24 and a second installation part 25, the thickness of the first installation part 24 and the second installation part 25 is a metal structure of h_gnd_leg, the height of the extension part of the clamping hook is h_fix, the size value of the h_fix is generally equal to the thickness of the fixed target 5, a clamping hook with a protruding tip is arranged below the extension part of the clamping hook, the clamping hook at the lower side of the first installation part 24 and the clamping hook at the lower side of the second installation part 25 are mutually parallel and symmetrically arranged, a groove 23 structure is arranged between the two clamping hooks in the first grounding structure 2, the height of the groove 23 is w_gap, the height of the groove 23 is smaller than the thickness h_gnd_leg of the first installation part 24 and the second installation part 25, the wire hole 22 penetrates through the horizontal arm of the first grounding structure 2, specifically, the diameter of the wire hole 22 can be set to be divam_t, the wire can be a wire 4, and the wire can penetrate through the wire hole 11 in the wire hole after the wire hole is used for connecting the wire hole to the wire hole 11.

As shown in fig. 6, the connection part 11 is a metal cylinder disposed right above the wire guide 22 and connected to the radiation structure 1, the height of the metal cylinder is h_pin, and the diameter of the metal cylinder is diap_pin; the height of the connection portion 11 is smaller than the interval between the lower surface of the radiation structure 1 and the upper surface of the horizontal arm of the first ground structure 2, and the diameter of the connection portion 11 is smaller than the diameter of the wire guide 22.

The second ground structure 3 is connected to the radiating structure 1, and when the radiating structure 1 is a rectangular metal sheet, the second ground structure 3 is connected to a side of the rectangular metal sheet opposite to the opening of the high-frequency slot 13, such as when the opening of the high-frequency slot 13 is located at the left side of the rectangular metal sheet, the second ground structure 3 is connected to the right side of the rectangular metal sheet, and when the opening of the high-frequency slot 13 is located at the right side of the rectangular metal sheet, the second ground structure 3 is connected to the left side of the rectangular metal sheet; the second grounding structure 3 is in contact with the edge of the radiation structure 1, and as shown in fig. 8, the thickness of the second grounding structure 3 is h_edgnd, the height is l_edgnd, specifically, the distance from the upper surface of the radiation structure 1 to the bottom plane where the hooks are installed in the first grounding structure 2, and specifically, the height of the second grounding structure 3 is: l_edgnd=h_gnd_leg+h_gnd_edge+h_patch, the width of the second grounding structure 3 is w_edgnd, a part of the lower part of the second grounding connection structure is bent in parallel, the bending length of the second grounding connection structure is l_edgnd_fix, the second grounding connection structure is used for realizing the radiation grounding function of the integral planar antenna, the integral resonance performance of the antenna is affected by changing the size w_edgnd, when the resonance performance of the planar antenna needs to be changed, the size w_edgnd of the second grounding structure 3 can be adjusted, and the specific adjustment size needs to be determined according to practical situations and is not repeated herein; meanwhile, the bending structure of the second grounding chain structure is used for sliding and fixing with the fixing interface structure of the fixing target 5.

The opening of the high-frequency slot 13 may also be located on the right side of the rectangular metal sheet, at which time the second grounding structure 3 needs to be connected to the left side of the rectangular metal sheet, and the second grounding structure 3 includes a main body portion 31 and a second clamping portion 32, the second clamping portion 32 is bent toward the first grounding structure 2, and the thickness of the second grounding structure 3 may be set to h_edgnd, and the height is set to l_edgnd, where the height refers specifically to the distance from the upper surface of the radiation structure 1 to the bottom plane where the hooks are installed in the first grounding structure 2, and specifically, the height of the second grounding structure 3 is: l_edgnd=h_gnd_leg+h_gnd_edge+h_patch, the width of the second grounding structure 3 is w_edgnd, a part of the lower part of the second grounding connection structure is bent in parallel, the bending length of the second grounding connection structure is l_edgnd_fix, the second grounding connection structure is used for realizing the radiation grounding function of the integral planar antenna, the integral resonance performance of the antenna is affected by changing the size w_edgnd, when the resonance performance of the planar antenna needs to be changed, the size w_edgnd of the second grounding structure 3 can be adjusted, and the specific adjustment size needs to be determined according to practical situations and is not repeated herein; meanwhile, the bending structure of the second grounding chain structure is used for sliding and fixing with the fixing interface structure of the fixing target 5.

When the dual-frequency planar antenna provided by the embodiment is fixedly installed with the fixed target 5 structure, the hook on the first grounding plate structure is clamped into the gap reserved by the fixed target 5, so that the planar antenna is integrally fixed with the fixed target 5 in a plane, meanwhile, the fixed target 5 structure is required to be reserved with a fixed interface, and the bent part of the second grounding connection structure can be clamped into the fixed interface structure in a sliding manner. After the planar antenna is fixedly clamped and installed with the fixed target 5 structure through the clamping hooks of the first grounding plate structure and the bending parts of the second grounding connection structure, the planar antenna can be integrally and stably fixed, and meanwhile, the grounding function of the antenna body is simultaneously realized through the first grounding structure 2 and the second grounding connection structure.

In a specific use process, one end of the radio frequency lead 4 is connected with the signal receiving and transmitting module, the other end is connected with the connecting part 11 on the radiation structure 1 through the lead hole 22 on the first grounding structure 2, the radio frequency lead 4 extending out of the guide hole and positioned at the lower part of the first grounding structure 2 can be accommodated in the groove 23 of the first grounding structure 2, so that the radio frequency lead 4 can be freely routed in the groove 23 of the first grounding structure 2.

In summary, the planar antenna provided in this embodiment can be fixed with a target fixed object without using fixing auxiliary parts such as a screw and a nut, and meanwhile, by arranging the structures such as the wire hole 22 and the groove 23 on the first grounding structure 2, the connection and routing distribution of the radio frequency wires 4 can be facilitated, and meanwhile, the ground wire structure of the antenna is fully utilized, and the grounding function of the antenna radiation can be realized while the fixing function is completed through the first grounding structure 2 and the second grounding structure 3. The planar antenna provided by the embodiment can simplify the installation of a production line when being used on a desktop, and simultaneously realize better antenna radiation performance.

In an embodiment, the radiation structure 1, the first grounding structure 2, the second grounding structure 3, and the connection portion 11 in the planar antenna provided herein are all made of pure copper, and the fixed target 5 may be made of pure iron.

As shown in fig. 16 and 17, the planar antenna manufactured by adopting the data in the following table can realize the impedance resonance performance of less than-6 dB in S11 of the frequency bands of 2.39GHz-2.51GHz and 4.9GHz-6GHz, wherein S11 is the antenna impedance parameter, and meanwhile, the radiation efficiency of the planar antenna in the frequency band is more than 80%. The electromagnetic distribution diagram of the antenna metal structure of the planar antenna at the frequency points of 2.4GHz and 5.2GHz provided by the embodiment can analyze that the 5.2GHz high-frequency performance of the planar antenna is mainly excited and radiated by the high-frequency slot 13 structure of the radiation structure 1, the 2.4GHz low-frequency performance is mainly excited and radiated by the structure of the low-frequency slot 12 of the radiation structure 1, and meanwhile, the first grounding plate structure and the second grounding structure 3 of the planar antenna play a role in grounding. The planar antenna provided in this embodiment has an effective maximum radiation gain of 4.3dB at 2.4GHz and an effective radiation gain of 6.09dB at 5.2 GHz.

The dimensions of the parts of the radiating structure 1, the first ground structure 2, the second ground structure 3, and the connection 11 are as follows:

in addition, the planar antenna provided by the embodiment can be suitable for the current WiFi and Bluetooth wireless functions.

In the process of installing the planar antenna provided by the application, when the first grounding structure 2 is only provided with the first clamping part 21 and the second grounding structure 3 is not connected with the fixed target 5, each part of the planar antenna needs to be assembled first when the planar antenna is installed, after the assembly is completed, the first clamping part 21 corresponds to a corresponding clamping groove in the fixed target 5, the planar antenna is moved, and the first clamping part 21 stretches into the fixed target 5 and is clamped with the fixed target 5, so that the installation of the planar antenna is completed.

When the first clamping portion 21 is a hook structure that is disposed opposite to each other, each portion of the planar antenna needs to be assembled first, after the assembly is completed, the hook is made to correspond to a corresponding slot in the fixed target 5, and the planar antenna is pressed downward, so that the hook extends into the fixed target 5 and is clamped with the fixed target 5, and the installation of the planar antenna is completed.

It should be noted that, in the process of installation, the bending end portion of the hook may deform to different degrees, so that in the process of setting the hook, the hardness of the hook needs to be noted, so that the hook has a certain hardness, so as to ensure that the planar antenna is effectively fixed, and meanwhile, the planar antenna needs to be ensured to be capable of realizing the fixing and clamping with the fixing target 5.

When the first grounding structure 2 is provided with the first clamping part 21 and the second grounding structure 3 is provided with the second clamping part 32, and the extending direction of the second clamping part 32 is perpendicular to the extending direction of the clamping hook, when the planar antenna is installed, each part of the planar antenna needs to be assembled first, after the assembly is completed, the second clamping part 32 slides into the sliding groove of the fixed target 5 along the extending direction thereof, so that the second clamping part 32 is clamped with the sliding groove of the fixed target 5, and when the first clamping part 21 moves to a position corresponding to a corresponding clamping groove in the fixed target 5, the planar antenna is pressed downwards, so that the first clamping part 21 stretches into the fixed target 5 and is clamped with the fixed target 5, and the installation of the planar antenna is completed.

In addition to the above planar antenna, the present invention further provides a wireless communication device including the fixed target 5 and any one of the planar antennas disclosed above, where the fixed target 5 is provided with a first clamping slot 51 for being clamped or released by matching with the first clamping portion 21, and a signal transceiver module for being connected with a wire, and the structure of other parts of the wireless communication device is referred to the prior art, and is not repeated herein.

The wireless communication device in this embodiment may be a desktop computer, or may be other devices capable of performing wireless communication, such as a mobile phone, and is specifically determined according to an actual situation, which is not described herein.

In the process of using the wireless communication device provided in this embodiment, when the antenna is installed, first, the first clamping groove 51 for being clamped and matched with the first clamping portion 21 needs to be reserved in the fixed target 5, in the process of installation, each part of the planar antenna needs to be assembled, after the assembly is completed, the first clamping portion 21 corresponds to the first clamping groove 51 in the fixed target 5, the planar antenna is moved, and the first clamping portion 21 extends into the fixed target 5 and is clamped with the fixed target 5, so that the installation of the planar antenna is completed.

When the first clamping portion 21 is a relatively arranged clamping hook, a first clamping groove 51 for being matched and clamped with the clamping hook needs to be arranged in the fixing target 5 of the fixing target 5, the cross section of the first clamping groove 51 can be of a bending structure, when the planar antenna is installed, all parts of the planar antenna need to be assembled at first, after the assembly is completed, the clamping hook corresponds to the first clamping groove 51 in the fixing target 5, the planar antenna is pressed downwards, and the clamping hook stretches into the fixing target 5 and is clamped with the fixing target 5, so that the installation of the planar antenna is completed.

In the process of installing the planar antenna, the wireless communication equipment in the embodiment does not need complicated operations such as screwing screws, pasting conductive adhesive and the like, so that the installation process of the planar antenna is simple and easy to carry out.

When the wireless communication device in this embodiment is a desktop computer, the planar antenna needs to be mounted on the desktop computer, first, the fixing target 5 needs to be mounted on the desktop computer, and the fixing target 5 is provided with a first clamping groove 51 for being in clamping fit with the first clamping portion 21; firstly, each part of the planar antenna needs to be assembled, after the assembly is completed, the first clamping part 21 corresponds to the first clamping groove 51 in the fixed target 5, the planar antenna is moved, and the first clamping part 21 extends into the fixed target 5 and is clamped with the fixed target 5, so that the installation of the planar antenna is completed.

In a specific use process, when a signal is required to be sent to the outside, the wireless communication equipment controls the signal receiving and transmitting module connected with the lead to send out the signal, the signal is transmitted to the radiation structure 1 through the lead and the connecting part 11, and the radiation structure 1 radiates the signal outwards; when the radiation structure 1 receives a signal sent from the outside, the signal is transmitted to the wire through the radiation structure 1 and the connection part 11, and is transmitted to the signal transceiver module through the wire, and the signal transceiver module transmits the received signal to the relevant controller of the wireless communication device.

In a specific embodiment, there is further provided a wireless communication device including the fixing target 5 and the planar antenna mentioned in any one of the above, the fixing target 5 being provided with a first clamping groove 51 for engaging with or disengaging from the first clamping portion 21, a signal transceiver module for connecting with a wire, and a second clamping groove 52 for engaging with or disengaging from the second clamping portion 32.

In the process of using the wireless communication device provided in this embodiment, when the planar antenna is installed, first, the first clamping groove 51 for clamping and matching with the first clamping portion 21 and the second clamping groove 52 for clamping and releasing with the second clamping portion 32 need to be reserved in the fixed target 5, in the process of installation, each part of the planar antenna needs to be assembled, after the assembly is completed, the second clamping portion 32 slides into the second clamping groove 52, and when the planar antenna slides to the position corresponding to the first clamping portion 21 and the first clamping groove 51, the planar antenna is further moved, so that the first clamping portion 21 extends into the fixed target 5 and is clamped with the fixed target 5, and the installation of the planar antenna is completed.

When the first clamping portion 21 is a clamping hook which is oppositely arranged and the second clamping portion 32 is a bending portion which is arranged at the bottom of the second grounding structure 3, a first clamping groove 51 which is used for being matched and clamped with the clamping hook and a second clamping groove 52 which is used for being matched and clamped with the second clamping portion 32 need to be arranged in the fixing target 5 of the fixing target 5, the cross section of the first clamping groove 51 can be of a bending structure, the cross section of the second clamping groove 52 is matched with the cross section of the second clamping portion 32, when the planar antenna is installed, all parts of the planar antenna need to be assembled, after the assembly is completed, the second clamping portion 32 slides into the second clamping groove 52, and when the clamping hook slides to correspond to the first clamping groove 51 in the fixing target 5, the planar antenna is pressed downwards, so that the clamping hook stretches into the fixing target 5 and is clamped with the fixing target 5, and the installation of the planar antenna is completed.

When the wireless communication device in this embodiment is a desktop computer, the planar antenna needs to be mounted on the desktop computer, first, the fixing target 5 needs to be mounted on the desktop computer, and the fixing target 5 is provided with a first clamping groove 51 for being clamped and matched with the first clamping portion 21 and a second clamping groove 52 for being clamped and matched with the second clamping portion 32; as shown in fig. 14, the second clamping groove 52 is disposed on an installation block on the surface of the fixed target 5, the installation block and the upper surface of the fixed target 5 form the second clamping groove 52, the second clamping groove 52 includes a horizontal section and a vertical section, an included angle between the horizontal section and the vertical section is 90 °, in a specific matching process, a vertical portion of the second grounding structure 3 is matched with the vertical section of the second clamping groove 52, a horizontal portion of the second grounding structure 3 is matched with the horizontal section of the second clamping groove 52, in an installation process, each portion of the planar antenna needs to be assembled, after the assembly is completed, the second clamping portion 32 slides into the second clamping groove 52, and when the second clamping groove 52 slides to a position corresponding to the first clamping portion 21 and the first clamping groove 51, the planar antenna is further moved, so that the first clamping portion 21 extends into the fixed target 5 and is clamped with the fixed target 5, and the installation of the planar antenna is completed. When the first clamping portion 21 is a clamping hook which is arranged in a reverse manner, and the second clamping portion 32 is a bend which is arranged at the bottom of the second grounding structure 3, a first clamping groove 51 which is used for being matched and clamped with the clamping hook and a second clamping groove 52 which is used for being matched and clamped with the second clamping portion 32 need to be arranged in the fixing target 5 of the fixing target 5, the cross section of the first clamping groove 51 can be of a bending structure, the cross section of the second clamping groove 52 is matched with the cross section of the second clamping portion 32, when the planar antenna is installed, all parts of the planar antenna need to be assembled, after the assembly is completed, the second clamping portion 32 slides into the second clamping groove 52, when the second clamping groove corresponds to the first clamping groove 51 in the fixing target 5, the planar antenna is pressed downwards, so that the clamping hook stretches into the fixing target 5 and is clamped with the fixing target 5, and the installation of the planar antenna is completed.

When the wireless communication device in this embodiment is a notebook computer or an industrial communication device, the planar antenna needs to be mounted on the desktop computer, first, the fixing target 5 needs to be mounted on the desktop computer, and the fixing target 5 is provided with a first clamping groove 51 for being clamped and matched with the first clamping portion 21 and a second clamping groove 52 for being clamped and matched with the second clamping portion 32; the second clamping groove 52 is formed on the mounting block on the surface of the fixed target 5, when the included angle between the main body part 31 of the second grounding structure 3 and the second clamping part 32 is an acute angle, the second clamping groove 52 is formed between the mounting block and the upper surface of the fixed target 5, the second clamping groove 52 comprises an inclined section and a vertical section, the included angle between the inclined section and the vertical section is smaller than 90 degrees, in the specific matching process, the vertical part of the second grounding structure 3 is matched with the vertical section of the second clamping groove 52, the second clamping part 32 of the second grounding structure 3 is matched with the inclined section of the second clamping groove 52, in the mounting process, each part of the planar antenna needs to be assembled, after the assembly is completed, the second clamping part 32 slides into the second clamping groove 52, and when the planar antenna slides to the position corresponding to the first clamping part 21 and the first clamping groove 51, the planar antenna is further moved, so that the first clamping part 21 stretches into the fixed target 5 and is clamped with the fixed target 5, and the planar antenna is mounted. When the first clamping portion 21 is a clamping hook which is arranged in a reverse manner, and the second clamping portion 32 is a bend which is arranged at the bottom of the second grounding structure 3, a first clamping groove 51 which is used for being matched and clamped with the clamping hook and a second clamping groove 52 which is used for being matched and clamped with the second clamping portion 32 need to be arranged in the fixing target 5 of the fixing target 5, the cross section of the first clamping groove 51 can be of a bending structure, the cross section of the second clamping groove 52 is matched with the cross section of the second clamping portion 32, when the planar antenna is installed, all parts of the planar antenna need to be assembled, after the assembly is completed, the second clamping portion 32 slides into the second clamping groove 52, when the second clamping groove corresponds to the first clamping groove 51 in the fixing target 5, the planar antenna is pressed downwards, so that the clamping hook stretches into the fixing target 5 and is clamped with the fixing target 5, and the installation of the planar antenna is completed.

In the process of installing the planar antenna, the wireless communication device in the embodiment does not need to use complicated operations such as screwing screws, pasting conductive adhesive and the like, so that the installation process of the planar antenna is simple and easy to carry out, and the first grounding structure 2 and the second grounding structure 3 are both connected with the fixed target 5, thereby realizing the dual grounding function.

On the basis of the above embodiment, the extending direction of the first clamping groove 51 may be perpendicular to the extending direction of the second clamping groove 52, and in the actual fixing process, the moving direction of the planar antenna defined by the mating and clamping of the first clamping groove 51 and the first clamping portion 21 and the mating and clamping of the second clamping groove 52 and the second clamping portion 32 may be different, so that the installation firmness of the planar antenna may be effectively provided.

The first clamping portion 21 and the second clamping portion 32, and the "first" and the "second" in the first clamping groove 51 and the second clamping groove 52 are merely for distinguishing the difference of positions, and are not separated in sequence.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. Any combination of all the embodiments provided in the present invention is within the protection scope of the present invention, and will not be described herein.

The planar antenna and the wireless communication device provided by the invention are described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims

1. A planar antenna, comprising:

A radiation structure (1) for radiating or receiving signals outwards, the radiation structure (1) being provided with a connection (11);

a first grounding structure (2), wherein the first grounding structure (2) is connected to the lower part of the radiation structure (1), and the first grounding structure (2) is provided with a first clamping part (21) for clamping with a fixed target (5) and a wire guide (22) for enabling a wire to pass through; the first clamping part (21) is arranged at one side of the first grounding structure (2) away from the radiation structure (1); the wire is connected to the connection portion (11) through the wire guide (22);

a second grounding structure (3), one end of which is connected to the side edge of the radiation structure (1) and the other end of which is connected to the fixed target (5);

the radiation structure (1), the first grounding structure (2) and the second grounding structure (3) are all made of conductive metal materials;

the first clamping part (21) comprises a clamping hook used for being matched with the fixed target (5) in a clamping way;

the second grounding structure (3) comprises a main body part (31) and a second clamping part (32);

the extending direction of the second clamping part (32) is perpendicular to the extending direction of the clamping hook.

2. The planar antenna of claim 1, wherein the number of hooks is two, and the two hooks are disposed opposite or opposite to each other.

3. A planar antenna according to claim 2, characterized in that two of the hooks are symmetrically arranged about a middle cross-section of the first ground structure (2).

4. A planar antenna according to claim 1, characterized in that the side of the first ground structure (2) facing the fixation target (5) is provided with a recess (23), which recess (23) is intended to accommodate a wire passing through the wire guide (22).

5. A planar antenna according to claim 4, characterized in that the wire guide (22) is arranged in the recess (23).

6. A planar antenna according to any one of claims 1-5, characterized in that the radiating structure (1) is a sheet-like structure.

7. The planar antenna according to claim 6, wherein the first grounding structure (2) is an L-shaped structure, a vertical arm of the L-shaped structure is connected with the radiating structure (1), and the first clamping portion (21) is disposed on a lower surface of a horizontal arm of the L-shaped structure.

8. The planar antenna according to claim 7, wherein the connection portion (11) is a columnar structure provided at a lower surface of the radiation structure (1), and a diameter of the connection portion (11) is smaller than a diameter of the wire guide (22), and a height of the connection portion (11) is smaller than a height of a space between the lower surface of the radiation structure (1) and an upper surface of the horizontal arm of the first ground structure (2).

9. The planar antenna according to claim 7, characterized in that the connection (11) is arranged directly above the wire guide (22).

10. The planar antenna according to any of claims 1-5, characterized in that the radiating structure (1) is provided with a low frequency slot (12) and a high frequency slot (13), the opening of the low frequency slot (12) and the opening of the high frequency slot (13) being provided separately on two adjacent sides of the radiating structure (1).

11. The planar antenna according to claim 10, characterized in that the radiating structure (1) is a rectangular structure, the low frequency slot (12) and the high frequency slot (13) being rectangular slots.

12. The planar antenna according to claim 11, characterized in that the second clamping portion (32) is arranged at an end of the main body portion (31) away from the radiating structure (1), the main body portion (31) is connected with the radiating structure (1), the second clamping portion (32) is used for clamping connection with the fixed target (5), and the main body portion (31) is connected to a side of the radiating structure (1) opposite to the opening of the high-frequency slot (13).

13. The planar antenna according to claim 12, wherein the second engagement portion (32) is a bend provided in the main body portion (31).

14. A planar antenna according to claim 13, characterized in that the extension direction of the bend is perpendicular to the extension direction of the main body portion (31).

15. The planar antenna according to claim 12, characterized in that the thickness of the second ground structure (3) is the same as the thickness of the radiating structure (1), and the top end of the second ground structure (3) is flush with the upper surface of the radiating structure (1), and the bottom end of the second ground structure (3) is flush with the lower surface of the first ground structure (2) where the first clamping portion (21) is arranged.

16. The planar antenna according to any of claims 1-5, characterized in that the radiating structure (1), the first ground structure (2) and the second ground structure (3) are all of copper material.

17. A wireless communication device, characterized by comprising a fixed target (5) and a planar antenna according to any of claims 1-16, the fixed target (5) being provided with a first clamping groove (51) for cooperating with the first clamping part (21) for clamping or releasing and a signal transceiver module for connecting with the wire.

18. A wireless communication device, characterized by comprising a fixed target (5) and the planar antenna according to any one of claims 7-9, wherein the second grounding structure (3) comprises a main body portion (31) and a second clamping portion (32), and the fixed target (5) is provided with a first clamping groove (51) for being clamped or released in cooperation with the first clamping portion (21), a signal transceiver module for being connected with the wire, and a second clamping groove (52) for being clamped or released in cooperation with the second clamping portion (32).

19. The wireless communication device according to claim 18, wherein the direction of extension of the first card slot (51) is perpendicular to the direction of extension of the second card slot (52).