CN113555679A

CN113555679A - Antenna unit and electronic device

Info

Publication number: CN113555679A
Application number: CN202110796965.6A
Authority: CN
Inventors: 罗嘉文; 郭富祥; 魏路松; 林溥靖; 皇甫江涛
Original assignee: Zhejiang University ZJU; Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Zhejiang University ZJU; Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2021-10-26
Anticipated expiration: 2041-07-14
Also published as: CN113555679B

Abstract

The application relates to an antenna unit and an electronic device. First gap unit, second gap unit and the third gap unit of looks spaced have been seted up to radiation structure, and first gap unit includes first gap and the second gap that the interval set up, and first gap extends to first end, and the second gap extends to the second end, and second gap unit and third gap unit set up respectively in the both sides in first gap and extend to first end, and first end and second end are two tip that radiation structure paralleled. The first slot unit, the second slot unit and the third slot unit form an open slot, the effective path of the feed current on the radiation structure is increased, at least two resonant frequencies with lower adjustable frequency are generated, the radiation characteristic of the antenna unit is improved, the volume of the antenna unit can be effectively reduced, meanwhile, the antenna unit has the characteristic of low ground sensitivity, and the antenna unit is easier to apply to mobile communication equipment.

Description

Antenna unit and electronic device

Technical Field

The present application relates to the field of antenna technologies, and in particular, to an antenna unit and an electronic device.

Background

An antenna, which functions primarily in a radio device for transmitting or receiving electromagnetic waves, is an indispensable part of a radio technology device. However, the antenna unit still has the problems of large volume and large adjustable frequency ratio, and the use of the antenna is limited.

Disclosure of Invention

The embodiment of the application provides an antenna unit and electronic equipment, which can reduce the adjustable frequency ratio, widen the frequency band and reduce the volume.

An antenna unit, comprising:

the dielectric substrate is provided with a first side and a second side which are arranged oppositely;

the radiation structure is positioned on the first side of the medium substrate and is provided with a first gap unit, a second gap unit and a third gap unit which are spaced from each other, the first gap unit comprises a first gap and a second gap which are spaced from each other, the first gap extends to a first end part, the second gap extends to a second end part, the first end part and the second end part are two end parts parallel to the radiation structure, and the second gap unit and the third gap unit are respectively arranged on two sides of the first gap and extend to the first end part;

and the feeding structure is positioned on the second side of the dielectric substrate, penetrates through the dielectric substrate and is connected with the radiating structure, and is used for feeding electricity to the radiating structure.

Further, there is provided an electronic device including: the antenna unit comprises a shell and the antenna unit, wherein the antenna unit is accommodated in the shell.

The antenna unit and the electronic device comprise a dielectric substrate, a radiation structure and a feed structure. First gap unit, second gap unit and the third gap unit of looks spaced have been seted up to radiation structure, and first gap unit includes first gap and the second gap that the interval set up, and first gap extends to first end, and the second gap extends to the second end, and first end and second end are two tip that radiation structure paralleled, and second gap unit and third gap unit set up respectively in the both sides in first gap and all extend to first end. Meanwhile, because the first gap unit, the second gap unit and the third gap unit increase the effective path of the feed current on the radiation structure, at least two resonant frequencies with lower adjustable frequency can be generated, thereby improving the radiation characteristic of the antenna unit; in addition, due to the arrangement of the gap, the volume of the antenna unit can be effectively reduced, and meanwhile, the antenna unit has the characteristic of low ground sensitivity and is easier to apply to mobile communication equipment.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of an electronic device in one embodiment;

FIG. 2 is a schematic diagram of an embodiment of an antenna unit;

FIG. 3 is a schematic diagram of an embodiment of an antenna unit;

FIG. 4 is a schematic diagram of an embodiment of an antenna unit;

FIG. 5 is a schematic diagram of an embodiment of an antenna unit;

FIG. 6 is a schematic diagram of an embodiment of an antenna unit;

FIG. 7 is a schematic diagram of an embodiment of an antenna unit;

FIG. 8 is a schematic diagram of an embodiment of an antenna unit;

FIG. 9 is a schematic diagram of an embodiment of an antenna unit;

FIG. 10 is a graph of port scattering parameters versus frequency for an antenna unit in one embodiment;

fig. 11 is a far field radiation pattern at a frequency of 6.5GHz of the antenna unit in an embodiment;

fig. 12 is a far field radiation pattern at 8GHz frequency point of an antenna unit in one embodiment;

fig. 13 is a front view of a housing assembly of the electronic device of fig. 1 in another embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

In one embodiment, the electronic Device may be a communication module including a Mobile phone, a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable Device (e.g., a smart watch, a smart bracelet, a pedometer, etc.), or other settable antenna units. Alternatively, the antenna unit may be a UWB antenna, so that the electronic device may have a tag positioning function and an angle measuring function.

In an embodiment of the present application, as shown in FIG. 1, the electronic device 10 may include a display screen assembly 110, a housing assembly 120, and a controller. The display screen assembly 110 is fixed to the housing assembly 120, and forms an external structure of the electronic device together with the housing assembly 120. The housing assembly 120 may include a center frame and a rear cover. The middle frame can be a frame structure with a through hole. The middle frame can be accommodated in an accommodating space formed by the display screen assembly and the rear cover. The back cover is used to form the outer contour of the electronic device. The rear cover may be integrally formed. In the forming process of the rear cover, structures such as a rear camera hole, a fingerprint identification module, an antenna unit mounting hole and the like can be formed on the rear cover. Wherein, the back lid can be behind the nonmetal lid, for example, the back lid can be behind the plastic lid, the lid behind the pottery, the lid behind the 3D glass etc.. The controller can control the operation of the electronic device, etc. The display screen component can be used for displaying pictures or fonts and can provide an operation interface for a user.

In some embodiments, an antenna unit is integrated within the housing assembly 120, and the antenna unit is capable of transmitting and receiving electromagnetic waves through the housing assembly 120.

As shown in fig. 2, an antenna unit 200 according to an embodiment of the present disclosure includes a dielectric substrate 210, a radiation structure 220, and a feeding structure.

In the present embodiment, the dielectric substrate 210 has a first side and a second side opposite to each other. The first side may be used to provide the radiating structure 220 and the second side may be used to provide a feeding structure, which is connected to the radiating structure 220 through the dielectric substrate 210 to feed the radiating structure 220. In some embodiments, the dielectric substrate 210 may be made of a material with a lower dielectric constant, which is beneficial for increasing the bandwidth of the antenna. For example, the dielectric substrate 210 may be made of Rogers PCB material with a relative dielectric constant of 3.48.

In the present embodiment, the radiation structure 220 is located on the first side of the dielectric substrate 210, and the radiation structure 220 is provided with a first gap unit 221, a second gap unit 222 and a third gap unit 223 which are spaced apart from each other. The first slit unit 221 includes a first slit 310 and a second slit 320 which are disposed at an interval, the first slit 310 extends to a first end portion, the second slit 320 extends to a second end portion, the first end portion and the second end portion are two end portions parallel to the radiation structure 220, and the second slit unit 222 and the third slit unit 223 are disposed on two sides of the first slit 310 respectively and extend to the first end portion.

The radiation structure 220 is used for generating a feeding current under the feeding of the feeding structure, so as to transmit and receive electromagnetic wave signals. The material of the radiation structure 220 may be a conductive material, such as a metal material, an alloy material, a conductive silicon material, a graphite material, indium tin oxide, and the like, and may also be a material having a high dielectric constant, such as glass, plastic, ceramic, and the like having a high dielectric constant. The radiating structure 220 has two parallel first and second ends, and the radiating structure 220 is not limited to be formed, and may be rectangular, for example. In some embodiments, the area of the radiating structure 220 is smaller than the area of the dielectric substrate 210, and the radiating structure 220 is located in the central region of the dielectric substrate 210.

The first slot unit 221 includes a first slot 310 and a second slot 320 which are arranged at intervals, the first slot 310 extends to a first end, the second slot 320 extends to a second end, the first end and the second end are two ends parallel to the radiation structure 220, the second slot unit 222 and the third slot unit 223 are respectively arranged at two sides of the first slot 310 and extend to the first end, so that the first slot 310, the second slot 320, the second slot unit 222 and the third slot unit 223 form an open slot, which can play a coupling role and influence the transmission condition of electromagnetic waves; meanwhile, the radiation structure 220 is provided with a gap, so that the radiation structure has a characteristic of low ground sensitivity, and can be applied to mobile communication equipment.

Due to the arrangement of the first slot 310, the second slot 320, the second slot element 222 and the third slot element 223, the distribution of the feeding current on the radiating structure 220 is changed, the feeding current flows along the edges of the first slot 310, the second slot 320, the second slot element 222 and the third slot element 223, the effective path of the feeding current is increased, at least two resonant frequencies with lower adjustable frequency can be generated, so that the radiation characteristic of the antenna unit 200 is improved, and the area of the radiating structure 220 can be reduced due to the arrangement of the slots, so that the volume of the antenna unit 200 is effectively reduced. It should be noted that the frequency ratio refers to a ratio between a larger resonance frequency and a smaller resonance frequency.

In some embodiments, the first slit 310 and the second slit 320 are located on a centerline of the radiating structure 220, the centerline being parallel to the direction from the first end to the second end; the second slot unit 222 and the third slot unit 223 are symmetrically arranged about the center line, so that the feeding current formed on the surface of the radiation structure 220 is symmetrically distributed about the center line, which is beneficial to the symmetry of radiation and improves the symmetry of a directional diagram.

In some embodiments, the first slot 310 and the second slot 320 are symmetrically disposed about a midpoint of the central line, so that the feeding current formed on the surface of the radiating structure 220 is symmetrically distributed about the central line, and the feeding current flowing at the edge of the first slot unit 221 is also symmetrical about a perpendicular line of the central line, thereby further improving the symmetry of radiation, and further improving the symmetry of the pattern.

In some embodiments, the interface between the feeding structure and the radiating structure 220 forms a feeding end, and the feeding end is located at the midpoint of the central line, which is beneficial to reducing the loss of the antenna unit 200, avoiding the interference to the antenna, and fully and effectively utilizing the limited space.

In some embodiments, as shown in fig. 2, the second slit unit 222 includes a third slit 330, the third slit 330 extending to the first end; the third slot unit 223 includes a fifth slot 340, and the fifth slot 340 extends to the first end, so that the first slot 310, the second slot 320, the third slot 330, and the fifth slot 340 form four spaced open slots on the radiation structure 220, the four spaced open slots cut off a part of the feeding current on the radiation structure 220 in a direction perpendicular to the first end toward the second end, the feeding current flows along the edges of the first slot 310, the second slot 320, the third slot 330, and the fifth slot 340, and the effective path of the feeding current is increased, so that the radiation structure 220 can generate a resonance point with a lower adjustable frequency ratio, and the dual-frequency characteristic of the antenna unit 200 is achieved. Alternatively, the third slit 330 and the fifth slit 340 may be disposed at edge positions of both side ends of the first end, for example, when the radiation structure 220 is rectangular, the radiation structure 220 includes a first end, a third end, a second end and a fourth end which are adjacent in sequence, the first end and the second end are parallel to each other, the third end and the fourth end are parallel to each other, the third slit 330 and the fifth slit 340 extend to the first end, the third slit 330 is located at an edge region of the third end, and the fifth slit 340 is located at an edge position of the fourth end.

Wherein the length and width of the first and

second slits

310 and 320 will affect the position of the resonance point, and when the length of the first and

second slits

310 and 320 is larger, the frequency of the resonance point generated by the first, second, third and

fifth slits

310, 320, 330 and 340 is lower; as the widths of the first and

second slits

310 and 320 are larger, the frequencies of resonance points generated by the first, second, third, and

fifth slits

310, 320, 330, and 340 are lower.

In some embodiments, the first slit 310, the second slit 320, the third slit 330, and the fifth slit 340 are disposed in parallel; the extension length of the first slit 310 and the extension length of the second slit 320 are both smaller than the extension length of the third slit 330, and the extension length of the first slit 310 and the extension length of the second slit 320 are both smaller than the extension length of the fifth slit 340 (fig. 2 takes this embodiment as an example). The first slit 310, the second slit 320, the third slit 330 and the fifth slit 340 may be rectangular or curved strips, and the first slit 310, the second slit 320, the third slit 330 and the fifth slit 340 may be parallel to each other in an "S" shape, for example. Optionally, the widths of the third gap 330 and the fifth gap 340 are equal, the widths of the first gap 310 and the second gap 320 are equal, and the width of the third gap 330 is greater than the width of the first gap 310.

By setting the extension length of the first slot 310 and the extension length of the second slot 320 to be smaller than the extension length of the third slot 330, and setting the extension length of the first slot 310 and the extension length of the second slot 320 to be smaller than the extension length of the fifth slot 340, the effective path of the feeding current in the middle area is smaller than the effective path of the feeding current in the two side areas, which is beneficial to obtaining the reduction of the adjustable frequency ratio and simultaneously widening the frequency band of the antenna unit 200. Further optionally, the fifth slits 340 of the third slits 330 have the same extension length, the first slits 310 and the second slits 320 have the same extension length, and the extension length of the first slits 310 plus the extension length of the third slits 330 is equal to the distance between the first end and the second end of the radiating structure 220. It should be noted that, in other embodiments, the extension length of the first slot 310 and the extension length of the second slot 320 may be further adjusted according to the actual requirement of the frequency point location.

In some embodiments, as shown in fig. 3 (taking the number of the fourth slits 350 and the sixth slits 360 as three in fig. 3), the second slit unit 222 includes a third slit 330 and a plurality of fourth slits 350 arranged in parallel and spaced, the third slit 330 extends to the first end, and the fourth slits 350 communicate with the third slit 330; the third slit unit 223 includes a fifth slit 340 and a plurality of sixth slits 360 spaced apart and arranged in parallel, the fifth slit 340 extends to the first end, and the sixth slits 360 communicate with the fifth slit 340.

The first slot 310, the third slot 330, and the fifth slot 340 are located on the same side region of the radiation structure 220 and extend to the first end respectively, the second slot 320 is located on the other side region of the radiation structure 220 and extend to the second end, the first slot 310, the second slot 320, the third slot 330, and the fifth slot 340 form four intervals on the radiation structure 220 and open slots located on two regions, so that the feeding current in the direction from the first end to the second end is interrupted, and the feeding current flows along the edges of the first slot 310, the second slot 320, the third slot 330, and the fifth slot 340, so that the radiation structure 220 can generate at least two frequency points with smaller adjustable frequency, and the dual-frequency characteristic of the antenna unit 200 is achieved; moreover, since the plurality of fourth slots 350 and the plurality of third slots 330 are spaced and arranged in parallel and the plurality of sixth slots 360 and the plurality of fifth slots 340 are spaced and arranged in parallel, on the basis that a part of the feeding current in the direction from the first end to the second end is cut off, a part of the feeding current in the direction from the first end to the second end is also cut off, the feeding current flows along the edges of the fourth slots 350 and the sixth slots 360, so that the path of the feeding current is further increased, at least one resonance point is generated by the radiation structure 220, and the resonance frequency of the generated resonance point is located among the resonance frequencies of the resonance points generated by the first slots 310, the second slots 320, the third slots 330 and the fifth slots 340, so that the antenna unit 200 resonates at least three different frequency points, and the adjustable frequency ratio can be further reduced while the range of the adjustable frequency ratio is increased, further reducing the volume of the antenna unit 200.

Among the plurality of fourth slits 350, the distances between two adjacent fourth slits 350 may be the same or different; in the plurality of sixth slits 360, the distance between two adjacent sixth slits 360 may be the same or different. In some embodiments, as shown in fig. 3, taking the example that the second slot unit 222 includes three fourth slots 350 and the third slot unit 223 includes three sixth slots 360, the distance between two fourth slots 350 near the first end is greater than the distance between two fourth slots 350 away from the first end, and the distance between two sixth slots 360 near the first end is greater than the distance between two sixth slots 360 away from the first end, so that the plurality of fourth slots 350 and the plurality of fifth slots 340 are respectively located near the middle region and the edge region near the first end of the radiating structure 220, so that the feeding current is respectively concentrated at the middle region and the edge region near the first end of the radiating structure 220, which is beneficial for reducing the resonant frequency ratio.

Wherein, the plurality of fourth slits 350 may be located on the same side of the third slit 330 at the same time, for example, on the side of the third slit 330 close to the fifth slit 340 or on the side of the third slit 330 away from the fifth slit 340 at the same time, so that the plurality of fourth slits 350 and the connected third slit 330 form an "F" -like shape (as in fig. 3); the plurality of fourth slots 350 may also be respectively located at two sides of the third slot 330, so that the plurality of fourth slots 350 and the connected third slot 330 form a shape similar to a Chinese character feng (as shown in fig. 4 and 5, fig. 4 and 5 only show a partial structure of the antenna unit 200); further, a plurality of fourth slits 350 located on different sides of the third slit 330 may be symmetrically disposed about the central axis of the third slit 330, or may be slidably and symmetrically disposed about the central axis.

The plurality of sixth slits 360 may be located on the same side of the fifth slit 340 at the same time, for example, on a side of the fifth slit 340 close to the third slit 330 or on a side of the fifth slit 340 away from the third slit 330 at the same time, so that the plurality of sixth slits 360 and the connected fifth slits 340 form an "F" -like shape; the plurality of sixth slits 360 may also be respectively located at two sides of the fifth slit 340, so that the plurality of sixth slits 360 and the communicated fifth slit 340 form a shape similar to a Chinese character "feng"; further, a plurality of sixth slits 360 located on different sides of the fifth slit 340 may be symmetrically disposed about the central axis of the fifth slit 340, or symmetrically disposed about the central axis in a sliding manner.

In some embodiments, the fourth slot 350 is located on a side of the third slot 330 close to the fifth slot 340, and the sixth slot 360 is located on a side of the fifth slot 340 close to the third slot 330 (as shown in fig. 3), so that the plurality of fourth slots 350 and the plurality of sixth slots 360 are concentrated in a central region of the radiating structure 220, which is beneficial for obtaining a resonance point of lower frequency, thereby being beneficial for further reducing the tunable frequency ratio.

In some embodiments, the third slit 330 and the fifth slit 340 extend toward the first end toward the second end, respectively, and the fourth slit 350 and the sixth slit 360 extend perpendicular to the first end toward the second end; the extension length of the fourth slit 350 is smaller than that of the third slit 330, and the extension length of the sixth slit 360 is smaller than that of the fifth slit 340.

Since the third slit 330 and the fifth slit 340 extend towards the first end portion towards the second end portion at the same time, and the fourth slit 350 and the sixth slit 360 extend towards the direction perpendicular to the first end portion towards the second end portion at the same time, the second slit unit 222 and the third slit unit 223 extend towards two mutually perpendicular directions, respectively, and the paths of the feeding currents at the edges of the second slit unit 222 and the third slit unit 223 are effectively increased in the two perpendicular directions, respectively; further, since the extension length of the fourth slot 350 is smaller than that of the third slot 330, and the extension length of the sixth slot 360 is smaller than that of the fifth slot 340, the increasing path of the feeding current in the direction of the first end portion toward the second end portion is larger than the increasing path in the direction perpendicular to the first end portion toward the second end portion, which is favorable for exciting at least two resonance points in the main radiation direction.

Wherein, the extending lengths of the plurality of fourth slits 350 are equal (fig. 3 takes this as an example), or the extending lengths of the plurality of fourth slits 350 are gradually regular in the direction from the first end to the second end; the extending lengths of the sixth slits 360 are equal (for example, fig. 3), or the extending lengths of the sixth slits 360 gradually change from the first end to the second end. It should be noted that the number of the fourth slits 350 and the fifth slits 340 may be adjusted according to the number of actually required resonance points, and when more resonance points are required, more fourth slits 350 and more fifth slits 340 may be provided.

Wherein the length and width of the fourth and

sixth slots

350, 360 will affect the position of all resonance points. Suppose that the antenna unit 200 generates three frequency points, which are frequency point 1, frequency point 2, and frequency point 3, respectively, wherein the frequencies of the three frequency points are frequency point 1 < frequency point 2 < frequency point 3. When the lengths of the fourth slot 350 and the sixth slot 360 are larger, the frequencies of the three frequency points are lower; as the widths of the fourth slot 350 and the sixth slot 360 are larger, the frequencies of the frequency points 1 and 2 are lower and the frequency of the frequency point 3 is higher.

In this embodiment, as shown in fig. 6, the antenna unit 200 further includes a ground layer 230, where the ground layer 230 is located on the second side of the dielectric substrate 210; the feeding structure 240 is located on a side of the ground layer 230 away from the dielectric substrate 210, and penetrates through the ground layer 230, the dielectric substrate 210 and the radiating structure 220.

The ground layer 230 is located on the second side of the dielectric substrate 210, an opening is formed in the ground layer 230, a radio frequency chip may be disposed on a side of the ground layer 230 away from the dielectric substrate 210, the opening corresponds to a radio frequency port of the radio frequency chip 250, and the feeding structure 240 penetrates through the opening to be connected to the radio frequency port.

The material of the ground layer 230 may be a conductive material, such as a metal material, an alloy material, a conductive silicone material, a graphite material, indium tin oxide, or the like, and may also be a material with a high dielectric constant, such as glass, plastic, ceramic, or the like with a high dielectric constant.

In the present embodiment, as shown in fig. 6, the feeding structure 240 is located on the second side of the dielectric substrate and penetrates through the dielectric substrate 210 to be connected with the radiating structure 220 for feeding power to the radiating structure 220.

The interface of the feeding structure 240 and the radiation structure 220 forms a feeding end, the feeding structure 240 feeds power to the radiation structure 220 through the feeding end, and feeds a signal to the radiation structure 220, and the energy coupled to the radiation structure 220 excites the resonance of the current, thereby realizing the transceiving of electromagnetic wave signals.

In some embodiments, as shown in fig. 7, the feeding structure 240 includes a first conductor 241 and a second conductor 242 coaxially disposed, and the second conductor 242 is wrapped outside the first conductor 241 and insulated from the first conductor 241. The first conductor 241 penetrates through the dielectric substrate 210 and extends to the feed end connected to the radiating structure 220, and the second conductor 242 is connected to the ground layer 230 below the ground layer 230. Optionally, the first conductor 241 is a feed probe, an upper end of the feed probe penetrates through the dielectric substrate 210 and is connected to the radiating structure 220 at the feed end, and a lower end of the feed probe may be connected to the rf port of the rf chip.

Antenna unit 200 as one embodiment (see fig. 8 and 9, where fig. 9 shows only dielectric substrate 210 and feed terminal K):

the radiation structure 220 is a rogers R04350B plate with a length L1 being 20mm, a width W1 being 18mm and a thickness of 1.6mm, the radiation structure 220 is a rectangular metal patch with a length L2 being 10mm and a width W2 being 8mm, and is located in a central region of an upper surface of the dielectric substrate 210, the lower surface of the dielectric substrate 210 is entirely covered with metal to form the ground layer 230, the radiation structure 220 is provided with a first slot 310, a second slot 320, a third slot 330, three fourth slots 350, a fifth slot 340 and three sixth slots 360, the first slot 310 and the second slot 320 are located on a vertical center line of the radiation structure 220 and are symmetrical about the horizontal center line, the third slot 330 and the fifth slot 340 are symmetrical about the vertical center line, and the fourth slot 350 and the sixth slot 360 are symmetrical about the vertical center line.

The first slit 310 and the second slit 320 both have a length L3 of 4mm and a width W3 of 0.5 mm; the third slit 330 is 3mm away from the left boundary W0 of the rectangular metal patch, the length L4 mm 6mm, and the width W4 mm 0.7 mm; the three fourth slits 350 and the three sixth slits 360 have the same size, and the length of each of the three fourth slits 350 and the three sixth slits 360 is 1.25mm, and the width of each of the three W5 is 0.7 mm; the distance J1 of the two fourth slits 350 facing away from the first end is 0.6mm, and the distance J1 of the two fourth slits 350 close to the first end is 4.1 mm; the center point of the feeding terminal K is 8mm from the right end J3 of the dielectric substrate 210, and the center point of the feeding terminal K is 10mm from the lower end J4 of the dielectric substrate 210.

As shown in fig. 10, the frequency band of the antenna unit 200 of this example is 5.5GHz to 8GHz, and the bandwidth can reach 2.5GHz, with-10 dB as a standard. The antenna of this example is capable of resonating at least three different frequency points (5.5GHz, 6.5GHz, and 8.0GHz), where 5.5GHz and 8.0GHz are primarily generated by the third and

fifth slots

330 and 340 and are affected by the first and

second slots

310 and 320, the fourth slot 350, and the sixth slot 360, and 6.5GHz are primarily generated by the fourth and

sixth slots

350 and 360 and are affected by the first, second, third, and

fifth slots

310, 320, 330, and 340. The remote radiation gain of the antenna unit is relatively high, wherein the gains at two resonant frequency points of 6.5GHz and 8.0GHz are 3.648dBi and 3.832dBi respectively. As shown in fig. 11 and 12, the far-field radiation pattern of the antenna unit of the present example is unidirectional radiation and has a large directivity angle, and already unlike the microstrip slot antenna, the microstrip slot antenna radiates in two directions, and therefore the antenna unit of the present example has a higher gain compared to the conventional microstrip slot antenna. The antenna unit of the example can increase resonance frequency points and reduce the volume in a limited size, has a large adjustable frequency ratio range, can achieve the characteristic of a small adjustable frequency ratio, has low performance sensitivity to the ground, and is easy to integrate on various circuit boards without excessive size adjustment.

The antenna unit 200 provided in this embodiment includes a dielectric substrate 210, a radiation structure 220, and a feeding structure 240270. First gap unit 221, second gap unit 222 and third gap unit 223 of looks spaced have been seted up to radiation structure 220, first gap unit 221 includes first gap 310 and the second gap 320 that the interval set up, first gap 310 extends to first end, second gap 320 extends to the second end, first end and second end are two tip that radiation structure parallels, second gap unit 222 and third gap unit 223 set up respectively in the both sides of first gap 310 and all extend to first end. Meanwhile, due to the first slot unit 221, the second slot unit 222 and the third slot unit 223, effective paths of feed currents on the radiation structure 220 are increased, at least two resonant frequencies with lower adjustable frequencies can be generated, and thus the radiation characteristics of the antenna unit 200 are improved; in addition, due to the arrangement of the slot, the volume of the antenna unit 200 can be effectively reduced, and meanwhile, the antenna unit 200 has the characteristic of low ground sensitivity, and is easier to be applied to mobile communication equipment.

As shown in fig. 13, an electronic device includes a housing and the antenna unit 200 in any of the above embodiments, wherein the antenna unit 200 is accommodated in the housing.

In an embodiment, the electronic device includes a plurality of antenna units 200, and the plurality of antenna units 200 are distributed on different sides of the housing. For example, the casing includes a first side 121 and a third side 123 disposed opposite to each other, and a second side 122 and a fourth side 124 disposed opposite to each other, where the second side 122 is connected to one end of the first side 121 and the third side 123, and the fourth side 124 is connected to the other end of the first side 121 and the third side 123. At least two of the first side 121, the second side 122, the third side 123 and the fourth side 124 are respectively provided with the antenna unit 200. When the number of the antenna units 200 is 2, the 2 antenna units 200 are respectively located at the second side 122 and the fourth side 124, so that the overall size of the antenna unit 200 is reduced in the dimension of the non-scanning direction, and the antenna unit 200 can be placed at two sides of the electronic device.

The electronic device having the antenna unit 200 of any of the above embodiments has a lower adjustable frequency ratio and a higher gain, and at the same time, the antenna profile is effectively reduced, so that the antenna module is thinned, and the occupied space of the antenna module in the electronic device is reduced.

The electronic Device may be a communication module including a Mobile phone, a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable Device (e.g., a smart watch, a smart bracelet, a pedometer, etc.), or other settable antenna.

Any reference to memory, storage, database, or other medium used herein may include non-volatile and/or volatile memory. Suitable non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RM), which acts as external cache memory. By way of illustration and not limitation, RMs are available in a variety of forms, such as static RM (srm), dynamic RM (drm), synchronous drm (sdrm), double data rate sdrm (ddr sdrm), enhanced sdrm (esdrm), synchronous link (Synchlink) drm (sldrm), memory bus (Rmbus) direct RM (rdrm), direct memory bus dynamic RM (drdrm), and memory bus dynamic RM (rdrm).

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An antenna unit, comprising:

2. The antenna unit of claim 1, wherein the second slot unit includes a third slot and a plurality of spaced and parallel fourth slots, the third slot extending to the first end, the fourth slots communicating with the third slot;

the third gap unit comprises a fifth gap and a plurality of sixth gaps which are arranged at intervals in parallel, the fifth gap extends to the first end, and the sixth gaps are communicated with the fifth gaps.

3. The antenna unit of claim 2, wherein the first slot, the second slot, the third slot, and the fifth slot are arranged in parallel;

wherein the extension length of the first slit and the extension length of the second slit are both smaller than the extension length of the third slit, and the extension length of the first slit and the extension length of the second slit are both smaller than the extension length of the fifth slit.

4. The antenna unit of claim 2, wherein the fourth slot is located on a side of the third slot adjacent to the fifth slot, and wherein the sixth slot is located on a side of the fifth slot adjacent to the third slot.

5. The antenna unit according to claim 2, wherein the third slot and the fifth slot extend in a direction from the first end to the second end, respectively, and the fourth slot and the sixth slot extend in a direction perpendicular to the direction from the first end to the second end;

wherein an extension length of the fourth slit is smaller than an extension length of the third slit, and an extension length of the sixth slit is smaller than an extension length of the fifth slit.

6. The antenna unit according to claim 5, wherein the extension lengths of the plurality of fourth slots are equal, or the extension lengths of the plurality of fourth slots are gradually regular in a direction from the first end portion to the second end portion.

7. The antenna unit according to claim 5, wherein the extension lengths of the sixth slots are equal, or the extension lengths of the sixth slots are gradually regular in a direction from the first end to the second end.

8. The antenna unit of claim 1, wherein the second slot unit includes a third slot, the third slot extending to the first end;

the third slit unit includes a fifth slit extending to the first end.

9. The antenna element of any of claims 1-8, wherein said first slot and said second slot are located on a centerline of said radiating structure, said centerline being parallel to a direction from said first end to said second end;

wherein the second slit unit and the third slit unit are symmetrically disposed about the center line.

10. The antenna element of claim 9, wherein said first slot and said second slot are symmetrically disposed about a midpoint of said centerline.

11. The antenna element of claim 9, wherein an interface of said feed structure and said radiating structure forms a feed end, said feed end being located at a midpoint of said centerline.

12. The antenna unit of any one of claims 1-8, further comprising:

a ground layer on the second side of the dielectric substrate;

the feed structure is located on one side of the grounding layer, which is far away from the dielectric substrate, and penetrates through the grounding layer and the dielectric substrate to be connected with the radiation structure.

13. An antenna element according to any of claims 1-8, characterized in that the area of said radiating structure is smaller than the area of said dielectric substrate, said radiating structure being located in a central region of said dielectric substrate.

14. An electronic device, comprising:

a housing; and

an antenna unit according to any one of claims 1 to 13, wherein the antenna unit is housed within the housing.

15. The electronic device of claim 14, wherein the number of the antenna units is plural;

the shell comprises a first side edge and a third side edge which are arranged in a back-to-back manner, and a second side edge and a fourth side edge which are arranged in a back-to-back manner, wherein the second side edge is connected with one end of the first side edge and one end of the third side edge, and the fourth side edge is connected with the other end of the first side edge and the other end of the third side edge;

at least two of the first side, the second side, the third side and the fourth side are respectively provided with the antenna unit.