CN219067240U

CN219067240U - Dual-band loop antenna and tablet personal computer

Info

Publication number: CN219067240U
Application number: CN202223598839.9U
Authority: CN
Inventors: 马保军; 张治宇; 吴佳俊; 罗田
Original assignee: Emdoor Digital Technology Co ltd
Current assignee: Emdoor Digital Technology Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-23
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a dual-band loop antenna, which is used for a tablet personal computer comprising a radio frequency main board, and comprises a metal bottom plate and a connecting component, wherein the metal bottom plate is used as a bottom shell of the tablet personal computer, a debugging through hole which is arranged in a long way along a first direction is formed in the metal bottom plate, and the metal bottom plate is divided into a radiation part and a grounding part by the debugging through hole; the connecting assembly comprises a feeding piece, a grounding piece and a tuning piece, wherein the feeding piece is arranged on the radiating part and used for being electrically connected to a signal end of the radio frequency main board and dividing the radiating part into a first radiating branch and a second radiating branch, the grounding piece is oppositely arranged on the grounding part and used for being electrically connected to the grounding end of the radio frequency main board, and the tuning piece is arranged on at least one side of the feeding piece and respectively connected with the radiating part and the grounding part and used for moving along a first direction to adjust the first radiating branch and/or the second radiating branch. The metal bottom plate is used as the antenna main body to transmit and receive signals, so that the signals are prevented from being absorbed by the metal bottom plate, and the radiation efficiency and the anti-interference capability of the antenna are improved.

Description

Dual-band loop antenna and tablet personal computer

Technical Field

The utility model relates to the technical field of loop antennas, in particular to a dual-band loop antenna and a tablet personal computer.

Background

Along with the development of the communication industry, the existing consumer electronic products basically need to carry WiFi/BT and other functions, so that the electronic products must have antennas, and meanwhile, in the design process of a tablet personal computer, in order to design a better tablet shape and better touch hand feeling, the existing tablet backshell usually adopts a metal shell, so that the energy radiated by the built-in antenna is mostly absorbed by the metal backshell and the display screen, and the radiation efficiency of the antenna is affected.

Disclosure of Invention

The utility model mainly aims to provide a dual-band loop antenna and a tablet personal computer, and aims to solve the problem that the radiation efficiency of an existing all-metal tablet personal computer built-in antenna is low.

In order to achieve the above object, the dual-band loop antenna provided by the present utility model is used for a tablet computer, the tablet computer includes a radio-frequency motherboard, and the dual-band loop antenna includes:

the metal bottom plate is used as a bottom shell of the tablet personal computer, a debugging through hole is formed in the metal bottom plate, the debugging through hole is arranged in a long shape along a first direction, the metal bottom plate is divided into a radiation part and a grounding part by the debugging through hole, and the radiation part is positioned at one side of the debugging through hole perpendicular to the first direction;

the connecting assembly comprises a feeding piece, a grounding piece and a tuning piece, wherein the feeding piece is arranged on the radiating part and is used for being electrically connected to a signal end of the radio-frequency main board, the feeding piece divides the radiating part into a first radiating branch and a second radiating branch, the grounding piece is arranged on the grounding part relative to the feeding piece and is used for being electrically connected to a grounding end of the radio-frequency main board, the tuning piece is arranged on at least one side of the feeding piece, and is respectively connected with the radiating part and the grounding part, and the tuning piece is used for moving along a first direction to adjust the length of the first radiating branch and/or the length of the second radiating branch.

Optionally, the radiation portion and the grounding portion are respectively formed with a chute extending along the first direction;

the tuning piece is provided with a sliding block corresponding to the sliding groove, and the tuning piece is connected with the sliding groove through the sliding block.

Optionally, the tuning element comprises a metallic copper sheet.

Optionally, a waterproof layer is arranged on one side of the debugging through hole away from the tablet personal computer to seal the debugging through hole.

Optionally, the width of the debugging through hole is D, wherein D is more than or equal to 2.4mm and less than or equal to 2.6mm.

Optionally, the first radiation branch is used for radiating and/or receiving electromagnetic waves with the frequency f1, wherein 2400MHz is less than or equal to f1 is less than or equal to 2500MHz;

the second radiation branch is used for radiating and/or receiving electromagnetic waves with the frequency f2, wherein the frequency f2 is smaller than or equal to 5120MHz and smaller than or equal to 7150MHz.

Optionally, the feeding member includes a gold-plated vibrator.

Optionally, the metal bottom plate is made of aluminum alloy.

Optionally, the dual-band loop antenna further includes a coaxial cable, an inner wire of the coaxial cable is used for electrically connecting the feeding element with a signal end of the radio-frequency main board, and an outer wire of the coaxial cable is used for electrically connecting the ground feeding element with a ground end of the radio-frequency main board.

The utility model also provides a tablet personal computer, which comprises a radio frequency main board, and the dual-band loop antenna, wherein a feed piece and a ground feed piece of the dual-band loop antenna are respectively and electrically connected to a signal end and a ground end of the radio frequency main board.

According to the technical scheme provided by the utility model, the debugging through hole is formed in the bottom shell, namely the metal bottom plate, so that the metal bottom plate is divided into the radiation part and the grounding part through the debugging through hole, and the feed piece are respectively arranged in the radiation part and the grounding part, so that the metal bottom plate can be directly used as an antenna main body for receiving and transmitting signals, the signals are prevented from being absorbed by the metal bottom plate, and the radiation efficiency and the anti-interference capability of the antenna are improved; simultaneously, make the length of radiation branch adjustable through setting up the tuning, and then can adjust signal frequency as required, improve the antenna suitability.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic top view of an embodiment of a tablet computer according to the present utility model;

fig. 2 is a schematic diagram of a partial assembly structure of the dual band loop antenna of fig. 1;

fig. 3 is a return loss diagram of a dual band loop antenna provided by the present utility model;

fig. 4 is a standing wave diagram of a dual band loop antenna provided by the present utility model.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Dual-band loop antenna	21	Feed piece
1	Metal bottom plate	22	Ground feeding part
				11	Debug through hole	23	Tuning piece
12	Radiation part	231	Sliding block
				121	First radiating branch	3	Sliding chute
122	Second radiating branch	200	Radio frequency main board
				13	Grounding part	1000	Tablet personal computer
2	Connection assembly	X	First direction

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

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

In the case where a directional instruction is involved in the embodiment of the present utility model, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In view of this, the present utility model proposes a dual-band loop antenna, which aims to solve the problem of low radiation efficiency of the existing all-metal panel personal computer built-in antenna, wherein fig. 1 and fig. 2 are schematic structural diagrams of an embodiment of the dual-band loop antenna provided by the present utility model, and fig. 3 and fig. 4 are experimental test diagrams of an embodiment provided by the present utility model.

Referring to fig. 1 and 2, a dual-band loop antenna 100 is used for a tablet computer 1000, the tablet computer 1000 includes a radio-frequency motherboard 200, the radio-frequency motherboard 200 is provided with a signal end and a ground end, the dual-band loop antenna 100 includes a metal bottom plate 1 and a connection component 2, the metal bottom plate 1 is used as a bottom shell of the tablet computer 1000, a debug through hole 11 is formed on the metal bottom plate 1, the debug through hole 11 is arranged in a long shape along a first direction X, the debug through hole 11 divides the metal bottom plate 1 into a radiation part 12 and a ground part 13, and the radiation part 12 is positioned at one side of the debug through hole 11 perpendicular to the first direction X; the connection assembly 2 includes a feeding member 21, a grounding member 22 and a tuning member 23, the feeding member 21 is disposed on the radiating portion 12 and is used for being electrically connected to a signal end of the radio frequency motherboard 200, the feeding member 21 divides the radiating portion 12 into a first radiating branch 121 and a second radiating branch 122, the grounding member 22 is disposed on the grounding portion 13 opposite to the feeding member 21 and is used for being electrically connected to a grounding end of the radio frequency motherboard 200, the tuning member 23 is disposed on at least one side of the feeding member 21, and the tuning member 23 is respectively connected to the radiating portion 12 and the grounding portion 13, and the tuning member 23 is used for moving along a first direction X to adjust a length of the first radiating branch and/or the second radiating branch.

The debugging through hole 11 penetrates through the metal bottom plate 1, and the metal bottom plate 1 is made of aluminum alloy.

The debug via 11 divides the metal chassis 1 into a radiating portion 12 and a grounding portion 13, that is, the metal chassis 1 is the grounding portion 13 except for a portion of the radiating portion 12, and the radiating portion 12 and the grounding portion 13 have connectivity to form a loop antenna.

Assuming that the first direction X is a horizontal direction extending left and right, a direction perpendicular to the first direction X is a vertical direction extending up and down, based on which the radiation portion 12 is located on a side of the debug via 11 perpendicular to the first direction X, that is, on a side of the debug via 11 in the vertical direction.

Wherein, the arrangement of the ground feed member 22 relative to the feed member 21 specifically includes: the feeding piece 21 and the ground piece 22 are arranged on two sides of the debugging through hole 11 in the vertical direction opposite to each other, so that the distance between the feeding piece 21 and the ground piece 22 is minimum.

Wherein, tuning piece 23 locates feed piece 21 at least one side specifically includes: the tuning piece 23 is provided on the left side of the power feeding piece 21, or the tuning piece 23 is provided on the right side of the power feeding piece 21, or the tuning piece 23 is provided on both the left and right sides of the power feeding piece 21. When the tuning element 23 is arranged on the left side of the feed element 21, the tuning element 23 is able to adjust the length of the second radiating branch 122; when the tuning piece 23 is provided on the right side of the feeding piece 21, the tuning piece 23 can adjust the length of the first radiating branch 121; when the tuning member 23 is provided at both the left and right sides of the feeding member 21, the tuning member 23 is capable of adjusting the first radiating branch 121 and the second radiating branch 122.

Since the radiating branch length for transmitting and receiving the high frequency signal is short, the tuning piece 23 is generally provided on the radiating branch for transmitting and receiving the high frequency signal to adjust the frequency of the signal that the radiating branch can transmit and receive by shortening the length of the radiating branch.

In the technical scheme provided by the utility model, the debugging through hole 11 is formed in the bottom shell of the tablet personal computer 1000, namely the metal bottom plate 1, so that the metal bottom plate 1 is divided into the radiating part 12 and the grounding part 13 through the debugging through hole 11, and the feeding piece 21 and the feeding piece 22 are respectively arranged in the radiating part 12 and the grounding part 13, so that the metal bottom plate 1 can be directly used as an antenna main body for receiving and transmitting signals, the signals are prevented from being absorbed by the metal bottom plate 1, and the radiation efficiency and the anti-interference capability of the antenna are improved; meanwhile, the length of the radiating branch is adjustable by arranging the tuning piece 23, so that the signal frequency can be adjusted according to the requirement, and the adaptability of the antenna is improved.

Further, referring to fig. 2, the radiation portion 12 and the grounding portion 13 are respectively formed with a sliding slot 3 extending along the first direction X, the tuning piece 23 is provided with a sliding block 231 corresponding to the sliding slot 3, and the tuning piece 23 is connected with the sliding slot 3 through the sliding block 231, so that the movement of the tuning piece 23 in the first direction X is realized through the cooperation of the sliding block 231 and the sliding slot 3, which is simple and convenient, and has low cost.

After the tuning piece 23 is adjusted to the length of the radiation branch, the tuning piece 23 can be fixed in a soldering tin mode, the soldering tin mode can play a role in electric connection while fixing the tuning piece 23, and the soldering tin mode can be used for melting tin points when the tuning piece 23 needs to be adjusted, so that operation is convenient.

Further, the tuning piece 23 includes a metal copper sheet, and the tuning piece 23 is electrically connected through the metal copper sheet, so as to have a better conductive effect.

Further, since the debugging through hole 11 is a through hole, in order to prevent water vapor, dust and the like from entering the tablet pc 1000 through the debugging through hole 11, a waterproof layer is disposed on a side of the debugging through hole 11 facing away from the tablet pc 1000, so that the debugging through hole 11 is sealed through the waterproof layer. Because the waterproof layer is thinner, the receiving and dispatching of the antenna can not be influenced even if the debugging through hole 11 is sealed by the waterproof layer.

Further, the width of the tuning through hole 11 is D, wherein 2.4mm D is 2.6mm, and preferably, d=2.5 mm, the best coupling effect and impedance matching between the radiating portion and the ground portion can be obtained.

Further, the first radiating branch 121 is configured to radiate and/or receive electromagnetic waves with a frequency f1, where 2400MHz is less than or equal to f1 is less than or equal to 2500MHz, that is, the first radiating branch 121 implements receiving and transmitting of 2.4G signals, where the working length of the first radiating branch 121 is λ/2, and λ refers to the wavelength of the electromagnetic waves;

the second radiating branch 122 is configured to radiate and/or receive electromagnetic waves with frequency f2, wherein 5120MHz is less than or equal to f2 is less than or equal to 7150MHz, that is, the second radiating branch 122 is configured to receive and transmit 5G signals, where the working length of the second radiating branch 122 is λ/4, and λ refers to the wavelength of the electromagnetic waves.

Further, since the feeding element 21 is used for transmitting an electrical signal, the grounding element 22 is used for grounding, in order to avoid interference of the electrical signal transmitted by the feeding element 21, in this embodiment, the dual-band loop antenna 100 further includes a coaxial cable, an inner wire of the coaxial cable is used for electrically connecting the feeding element 21 and the signal end of the radio frequency motherboard 200, and an outer wire of the coaxial cable is used for electrically connecting the grounding element 22 and the grounding end of the radio frequency motherboard 200.

Further, in the present embodiment, the feeding member 21 includes a gold-plated vibrator, thereby enhancing the feeding capability and improving the oxidation preventing effect.

In addition, the present utility model further provides a tablet pc 1000, where the tablet pc 1000 includes the dual-band loop antenna 100 in the above-mentioned scheme, and it should be noted that the structure of the dual-band loop antenna 100 in the tablet pc 1000 may refer to the embodiment of the dual-band loop antenna 100, which is not described herein again; because the dual-band loop antenna 100 is used in the tablet pc 1000 provided by the present utility model, the embodiments of the tablet pc 1000 provided by the present utility model include all the technical solutions of all the embodiments of the dual-band loop antenna 100, and the achieved technical effects are identical, and are not described in detail herein.

In this embodiment, the tablet pc 1000 further includes a radio frequency motherboard 200, the feeding element 21 and the ground feeding element 22 of the dual-band loop antenna 100 are respectively electrically connected to the signal end and the ground end of the radio frequency motherboard 200, and the specific connection mode is preferably that a coaxial cable is connected, wherein an inner wire of the coaxial cable is electrically connected to the feeding element 21 and the signal end of the radio frequency motherboard 200, and an outer wire of the coaxial cable is electrically connected to the ground feeding element 22 and the ground end of the radio frequency motherboard 200.

In another embodiment, the signal end and the ground end of the radio frequency motherboard 200 are respectively disposed towards the feeding element 21 and the feeding element 22, and the dual-band loop antenna 100 further includes two antenna pins, wherein one antenna pin is correspondingly abutted against the signal end and the feeding element 21, and the other antenna pin is correspondingly abutted against the ground end and the feeding element 22, so that the use of a feeder is avoided, and the installation space of the antenna is reduced.

For the specific implementation effect of the tablet pc 1000, please refer to the following table;

table 1WiFi OTA test data

Wherein TRP (Total Radiated Power) is obtained by integrating and averaging the transmit power of the entire radiating sphere. The method reflects the transmission power condition of the whole tablet computer 1000, and is related to the transmission power and the antenna radiation performance of the tablet computer 1000 under the conduction condition;

TIS (Total Isotropic Sensitivity) reflects the reception sensitivity index at the entire radiation sphere tablet computer 1000. The receiving sensitivity of the whole tablet computer 1000 is reflected, and the receiving sensitivity is related to the conduction sensitivity of the tablet computer 1000 and the radiation performance of the antenna.

As can be seen from the above table data and the contents of the diagrams in fig. 3 and 4, the antenna of the tablet pc 1000 has high radiation efficiency, strong anti-interference capability, and good signal receiving sensitivity.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. The utility model provides a dual-band loop antenna for the panel computer, the panel computer includes the radio frequency motherboard, its characterized in that, dual-band loop antenna includes:

2. The dual band loop antenna of claim 1 wherein said radiating portion and said ground portion are each formed with a runner extending in said first direction;

3. The dual band loop antenna of claim 2 wherein said tuning element comprises a metallic copper sheet.

4. A dual band loop antenna according to any of claims 1 to 3, wherein a waterproof layer is provided on a side of said debug via facing away from said tablet computer to seal said debug via.

5. A dual band loop antenna according to any of claims 1 to 3, wherein the width of said tuning via is D, wherein 2.4mm +.d +.2.6 mm.

6. A dual band loop antenna according to any of claims 1 to 3, wherein said first radiating branch is arranged to radiate and/or receive electromagnetic waves having a frequency f1, wherein 2400MHz +.f1 +.2500 MHz;

7. A dual band loop antenna according to any of claims 1 to 3 wherein said feed comprises a gold plated element.

8. A dual band loop antenna according to any of claims 1 to 3 wherein the metal chassis is of aluminium alloy.

9. The dual band loop antenna of claim 1 further comprising a coaxial cable, wherein an inner conductor of the coaxial cable is configured to electrically connect the feed and the signal end of the radio frequency motherboard, and wherein an outer conductor of the coaxial cable is configured to electrically connect the feed and the ground end of the radio frequency motherboard.

10. A tablet computer comprising a radio-frequency motherboard, wherein the tablet computer further comprises a dual-band loop antenna as claimed in any one of claims 1 to 9, and the feeding element and the ground feeding element of the dual-band loop antenna are respectively electrically connected to the signal end and the ground end of the radio-frequency motherboard.