TWM617237U - Dual-antennas system - Google Patents

Abstract

This case provides a dual antenna system, which includes a dielectric substrate and an antenna ground plane located on the same surface of the dielectric substrate, a first antenna, and a second antenna. The first antenna includes a first radiating part, a first frequency adjusting branch, a first coupling part, a first feeding part and a first signal source. The first end of the first radiating portion extends toward the antenna ground plane and is electrically connected to the antenna ground plane. The two ends of the first frequency adjustment branch are electrically connected to the second end of the first radiating part and the antenna ground plane, so that the first radiating part, the first frequency adjustment branch and the antenna ground plane form a first closed loop. The first coupling part is located in the first closed loop and is electrically connected to the first radiating part, the first feeding part is located in the first closed loop and has a first coupling distance with the first coupling part, and the first signal source The first feed-in part and the antenna ground plane are electrically connected. The second antenna includes a second radiating part, a second frequency adjusting branch, a second coupling part, a second feeding part and a second signal source, and has the same structural features as the first antenna.

Description

Dual antenna system

This case is related to a dual-antenna system.

Generally used in the dual antenna design of notebook computers, the area size of a single antenna unit is usually 8mm*40mm or 10mm*30mm. In this dual antenna system, the distance between the antenna unit and the unit is mostly maintained at the lowest operating frequency of the antenna To ensure good isolation between the antenna elements, the distance between the two antennas cannot be designed to be extremely close, so that there is no good spatial integration.

Furthermore, when the laptop screen moves towards a full-screen design, the narrow frame around the screen (approximately 4 to 6 mm) will greatly reduce the headroom area that the antenna can use, and the traditional dual-antenna size of the notebook will not be usable.

This case provides a dual antenna system, including a dielectric substrate, an antenna ground plane, a first antenna and a second antenna, and the antenna ground plane, the first antenna and the second antenna are located on the same surface of the dielectric substrate. The first antenna includes a first radiating part, a first frequency adjusting branch, a first coupling part, a first feeding part, and a first signal source. The first radiating portion has a first end and a second end. The first end extends toward the antenna ground plane and is electrically connected to the antenna ground plane. The two ends of the first frequency adjustment branch are electrically connected to the second end of the first radiating part and the antenna ground plane, so that the first radiating part, the first frequency adjustment branch and the antenna ground plane form a first closed loop. The first coupling part is located in the first closed loop and is electrically connected to the first radiating part, and the first feeding part It is located in the first closed loop and has a first coupling distance between it and the first coupling part. The first signal source is electrically connected to the first feeding part and the antenna ground plane. The second antenna includes a second radiating part, a second frequency adjusting branch, a second coupling part, a second feeding part, and a second signal source. The second radiating part has a third end and a fourth end. The third end is adjacent to the first end and extends toward the antenna ground plane and is electrically connected to the antenna ground plane. The two ends of the second frequency adjustment branch are electrically connected to the fourth end of the second radiating part and the antenna ground plane, so that the second radiating part, the second frequency adjustment branch and the antenna ground plane form a second closed loop. The second coupling portion is located in the second closed loop and is electrically connected to the second radiating portion, the second feeding portion is located in the second closed loop and has a second coupling distance between the second coupling portion, and the second signal source The second feed-in part and the antenna ground plane are electrically connected.

In summary, the dual-antenna system in this case effectively reduces the overall size of the antenna, and utilizes the characteristics of the antenna structure to achieve a good integration between the first antenna and the second antenna, and meet the requirements of high antenna isolation.

10: Dual antenna system

12: Dielectric substrate

121: first side

122: second side

14: Antenna ground plane

16: first antenna

18: The first radiation department

181: first end

182: second end

20: The first frequency adjustment branch

201: The first bending part

22: The first coupling part

221: The first long edge

222: second longest edge

223: The first short edge

224: second short edge

225: The first extension branch

24: The first feed-in part

241: The first horizontal metal segment

242: The first vertical metal segment

26: The first signal source

28: The first closed loop

30: second antenna

32: The second radiation department

321 Third End

322: fourth end

34: Second frequency adjustment branch

341: second bending part

36: The second coupling part

361: The third long edge

362: The fourth longest edge

363: Third Short Edge

364: fourth short edge

365: Second extension branch

38: The second feed-in part

381: second horizontal metal segment

382: second vertical metal segment

40: second signal source

42: Second closed loop

44: System ground plane

46: The first inductive element

48: second inductance element

D1: first coupling distance

D2: second coupling distance

Fig. 1 is a schematic structural diagram of a dual-antenna system according to an embodiment of the present case.

Fig. 2 is a schematic structural diagram of a dual-antenna system according to another embodiment of the present application.

Fig. 3 is a schematic diagram of a dual antenna system installed on the ground plane of the system according to an embodiment of the present case.

Fig. 4 is a schematic structural diagram of a dual-antenna system according to another embodiment of the present application.

Fig. 5 is a schematic diagram of the actual size of the dual antenna system according to Fig. 1.

Fig. 6 is a schematic diagram of S-parameter simulation generated at each frequency according to the dual antenna system of Fig. 5.

Please refer to Figure 1, a dual antenna system 10 includes a dielectric substrate 12, a The antenna ground plane 14, a first antenna 16 and a second antenna 30, and the antenna ground plane 14, the first antenna 16 and the second antenna 30 are arranged on the same surface of the dielectric substrate 12.

In the dual antenna system 10, the dielectric substrate 12 has two opposite sides, including two opposite first sides 121 and second sides 122. The antenna ground plane 14 is located on the dielectric substrate 12 and is close to the first side 121. The first antenna 16 includes a first radiating part 18, a first frequency adjustment branch 20, a first coupling part 22, a first feeding part 24 and a first signal source 26. The first radiating portion 18 is located on the dielectric substrate 12 and adjacent to the second side 122. The first radiating portion 18 has a first end 181 and a second end 182. The first end 181 extends toward the antenna ground plane 14 and is electrically connected. Connect to the antenna ground plane 14.

The two ends of the first frequency adjustment branch 20 are respectively electrically connected to the second end 182 of the first radiating portion 18 and the antenna ground plane 14, so that the first radiator portion 18, the first frequency adjustment branch 20 and the antenna ground plane 14 form A first closed loop 28. The first frequency adjustment branch 20 has at least one first bending portion 201. By adjusting the number of the first bending portion 201, the high-order mode and the position of the high-order modal current zero of the first antenna 16 can be adjusted. In one embodiment, the first bending portion 201 is formed by bending and extending toward the inner direction of the first closed loop 28, but the present case is not limited to this.

The first coupling portion 22 is located in the first closed loop 28 and is electrically connected to the first radiation portion 18. The first feeding portion 24 is located in the first closed loop 28 and between the first coupling portion 22 and the antenna ground plane 14. There is a first coupling distance D1 between the first feeding portion 24 and the first coupling portion 22. The first signal source 26 is electrically connected to the first feeding portion 24 and the antenna ground plane 14 so as to use the first signal source 26 to receive or transmit a radio frequency signal.

The second antenna 30 includes a second radiating portion 32 and a second frequency adjustment branch 34. A second coupling portion 36, a second feeding portion 38, and a second signal source 40. The second radiating portion 32 is located on the dielectric substrate 12 and adjacent to the second side 122. The second radiating portion 32 has a third end 321 and a fourth end 322. The third end 321 is adjacent to the first end 181 and faces the antenna ground plane 14. It extends in the direction of and is electrically connected to the antenna ground plane 14. The two ends of the second frequency adjustment branch 34 are respectively electrically connected to the fourth end 322 of the second radiating portion 32 and the antenna ground plane 14, so that the second radiator 32, the second frequency adjustment branch 34 and the antenna ground plane 14 form A second closed loop 42; wherein the second frequency adjustment branch 34 has at least one second bending portion 341 to adjust the number of the second bending portion 341 to adjust the high-order mode and high-order of the second antenna 30 The position of the modal current zero point. In one embodiment, the second bending portion 341 is formed by extending and bending toward the inner direction of the second closed loop 42, but the present case is not limited to this. The second coupling portion 36 is located in the second closed loop 42 and is electrically connected to the second radiation portion 32. The second feeding portion 38 is located in the second closed loop 42 and between the second coupling portion 36 and the antenna ground plane 14. There is a second coupling distance D2 between the second feeding portion 38 and the second coupling portion 36. The second signal source 40 is electrically connected to the second feeding portion 38 and the antenna ground plane 14 so as to use the second signal source 40 to receive or transmit a radio frequency signal.

The first frequency adjustment branch 20 and the second frequency adjustment branch 34 in this case separately use the first bending portion 201 and the second bending portion 341, in another embodiment, please refer to FIG. 2. The first frequency adjustment branch 20 can use a first inductance element 46 instead of the first bending portion 201, and the second frequency adjustment branch 34 can use a second inductance element 48 instead of the second bending portion 341 To achieve similar effects, but this case is not limited to this.

Please refer to FIG. 1. In an embodiment, in the dual antenna system 10, the first coupling portion 22 is in a rectangular shape and has a first long edge 221 and a second long edge 222 opposite to each other. And opposite to a first short edge 223 and a second short edge 224, the first The short edge 223 connects to the same end of the first long edge 221 and the second long edge 222, and the second short edge 224 connects to the other end of the first long edge 221 and the second long edge 222. The first feeding portion 24 has a T-shaped shape and includes a first horizontal metal segment 241 and a first vertical metal segment 242, and the first vertical metal segment 242 connects the first horizontal metal segment 241 and the first signal source 26 . The first long edge 221 of the first coupling portion 22 is electrically connected to the first radiating portion 18, and the second long edge 222 has a first coupling distance D1 between the first horizontal metal section 241 of the first feeding portion 24 . The second coupling portion 36 is also in a rectangular shape, and has a third long edge 361 and a fourth long edge 362 opposite to each other, and a third short edge 363 and a fourth short edge 364 opposite to each other. The third short edge 363 connects the same end of the third long edge 361 and the fourth long edge 362, and the fourth short edge 364 connects the other end of the third long edge 361 and the fourth long edge 362. The second feeding portion 38 is also in the shape of a T shape, and includes a second horizontal metal segment 381 and a second vertical metal segment 382, and the second vertical metal segment 382 is connected to the second horizontal metal segment 381 and the second signal source 40. The third long edge 361 of the second coupling portion 36 is electrically connected to the second radiating portion 32, and the fourth long edge 362 has a second coupling distance D2 between the second horizontal metal section 381 of the second feeding portion 38 .

In one embodiment, referring to FIGS. 1 and 3 at the same time, the dual antenna system 10 further includes a system ground plane 44 located on the outer edge of the first side 121 of the dielectric substrate 12, and the system ground plane 44 is electrically conductive Connect the antenna ground plane 14 to provide a sufficient grounding area.

In one embodiment, the above-mentioned system ground plane 44 can be a separate metal plate or a metal plane attached to an electronic device (for example, a notebook computer). For example, the system ground plane 44 can be an electronic device's The grounding part of the metal casing or the metal part or metal plate inside the plastic casing of the electronic device, but not limited thereto. Among them, the grounding of the system drawn in the preceding figure The size of the surface 44 is for illustration only, and the size of the system ground surface 44 may vary with the application of the dual antenna system 10.

In another embodiment, please refer to FIG. 4. In the dual antenna system 10, the first long edge 221 of the first coupling portion 22 is electrically connected to the first radiating portion 18, and the first short edge 223 is also electrically connected. Connecting to the first end 181 of the first radiating portion 18, the second long edge 222 extends from the second short edge 224 toward the first frequency adjustment branch 20 to form a first extension branch 225, so that the second long edge 222 And the first coupling distance D1 is maintained between the first extension branch 225 and the first horizontal metal section 241 of the first feeding portion 24. The third long edge 361 of the second coupling portion 36 is electrically connected to the second radiating portion 32, the third short edge 363 is electrically connected to the third end 321 of the second radiating portion 32, and the fourth long edge 362 is derived from the fourth short edge 364 extends a second extension branch 365 toward the direction of the second frequency adjustment branch 34, so that the fourth long edge 362 and the second extension branch 365 are maintained between the second horizontal metal segment 381 of the second feeding portion 38 The second coupling distance D2. The rest of the component structure and the corresponding connection relationship are still the same as the embodiment shown in FIG.

In one embodiment, as shown in FIG. 1, FIG. 2 or FIG. 4, the minimum distance between the first antenna 16 and the second antenna 30 is 4 mm.

In an embodiment, as shown in FIGS. 1, 2 and 4, the size of the first coupling distance D1 can be determined according to the coupling length between the first feeding portion 24 and the first coupling portion 22, when the first feeding portion The coupling length between the first horizontal metal section 241 of 24 and the second long edge 222 of the first coupling portion 22 is relatively long, the first coupling interval D1 may be relatively large, the coupling length may be relatively short, and the first coupling interval D1 may be relatively small , In order to maintain the appropriate amount of electromagnetic coupling. On the other hand, the size of the second coupling distance D2 can be based on the coupling length between the second feeding portion 38 and the second coupling portion 36 When the coupling length between the second horizontal metal section 381 of the second feeding portion 38 and the fourth long edge 362 of the second coupling portion 36 is longer, the second coupling distance D2 can be larger and the coupling length is shorter , The second coupling distance D2 can be smaller to maintain an appropriate amount of electromagnetic coupling.

In an embodiment, as shown in FIGS. 1, 2 and 4, the first radiating portion 18, the first frequency adjusting branch 20, the first coupling portion 22, the first feeding portion 24, and the first extension branch 225 The second radiating portion 32, the second frequency adjusting branch 34, the second coupling portion 36, the second feeding portion 38, the second extension branch 365, etc. can be made of conductive materials, and the antenna ground plane 14 is also conductive Made of flexible materials, such as silver, copper, iron, aluminum or their alloys, but not limited to this.

In one embodiment, the first antenna 16 and the second antenna 30 of the dual antenna system 10 shown in FIG. 1, FIG. 2 or FIG. 4 are mirrored and symmetrically arranged on the same surface of the dielectric substrate 12. Contributing to the design of the dual antenna system 10 can reduce the complexity of the antenna design. In other embodiments, the design of the first antenna 16 and the second antenna 30 can also be configured with non-mirror symmetry according to actual requirements, and the present case is not limited to this.

Please refer to FIG. 1, FIG. 2 or FIG. 4. In the dual antenna system 10 of this case, the first antenna 16 is coupled to the first closed loop 28 via the first feeding portion 24, and the second antenna 30 is fed via the second The inlet 38 is coupled to the second closed loop 42 to excite the full-wavelength and multiple high-order loop antenna modes. The full-wavelength antenna mode has the characteristics of a balanced structure, so the surface current of the full-wavelength antenna mode is limited to the structure of the first closed loop 28 and the second closed loop 42, and the current zero point (electric field strength) Area) is not located on the left and right sides of the first antenna 16 and the second antenna 30, but located on the upper and lower sides of the first antenna 16 and the second antenna 30, in order to reduce the operation in the full-wavelength antenna mode In this state, the coupling between the first antenna 16 and the second antenna 30 results in a relatively high degree of isolation between the first signal source 26 and the second signal source 40. In addition, in the full wave The first coupling part 22 and the second coupling part 36 are added to the zero point of the long antenna. In addition to increasing the equivalent antenna length and reducing the antenna size, the matching of the antenna modal can also be adjusted. A first bending portion 201 and at least one second bending portion 341 or the first inductance element 46 and the second inductance element 48 reduce the frequency of the high-order mode to the operating frequency band, that is, in a very limited antenna space, Covers the operating frequency band (2.4GHz~2.484GHz, 5.15GHz~7.125GHz), and at the same time maintains good isolation between the first signal source 26 and the second signal source 40.

The dual antenna system 10 proposed in this case indeed has a good reflection coefficient and a good isolation effect in the operating frequency band. Please refer to FIGS. 1 and 5 at the same time. In this dual antenna system 10, the length of the single first antenna 16 and the second antenna 30 is only 30mm and the width is only 5mm. The first antenna 16 and the second antenna The area of the two antennas 30 is only 150mm ² , which is smaller than the area occupied by the existing dual antenna system. Moreover, the minimum distance between the first antenna 16 and the second antenna 30 is only 4mm, which makes the entire double antenna The installation space required for the antenna system 10 is greatly reduced. Please refer to FIG. 1, FIG. 5, and FIG. 6 at the same time, so that the dual-antenna system 10 performs a simulation analysis of S parameters during radio frequency signal transmission. When operating in the operating frequency bands (2.4GHz~2.484GHz, 5.15GHz~7.125GHz), the S-parameter simulation results are shown in Figure 6. The antenna resonance frequency bands of the first antenna 16 and the second antenna 30 above the diagram Meet impedance matching -7.3dB (ie S11, S22 are less than -7.3dB), the isolation curve (S21) below the graph can be better than 15dB in the operating frequency band (S21 is less than -15dB), so in the entire operating frequency band All have good isolation inside. Therefore, the miniaturized dual antenna system 10 proposed in this case has good isolation in the operating frequency band, which meets actual product requirements.

In summary, the dual-antenna system in this case effectively reduces the overall size of the antenna, and utilizes the characteristics of the antenna structure to achieve good integration between the first antenna and the second antenna, and achieve To meet the requirements of high antenna isolation.

The above-mentioned embodiments are only to illustrate the technical ideas and features of the case. Their purpose is to enable those who are familiar with the technology to understand the content of the case and implement them accordingly. Equal changes or modifications made to the spirit of the disclosure should still be included in the scope of the patent application in this case.

10: Dual antenna system

12: Dielectric substrate

121: first side

122: second side

14: Antenna ground plane

16: first antenna

18: The first radiation department

181: first end

182: second end

20: The first frequency adjustment branch

201: The first bending part

22: The first coupling part

221: The first long edge

222: second longest edge

223: The first short edge

224: second short edge

24: The first feed-in part

241: The first horizontal metal segment

242: The first vertical metal segment

26: The first signal source

28: The first closed loop

30: second antenna

32: The second radiation department

321: third end

322: fourth end

34: Second frequency adjustment branch

341: second bending part

36: The second coupling part

361: The third long edge

362: The fourth longest edge

363: Third Short Edge

364: fourth short edge

38: The second feed-in part

381: second horizontal metal segment

382: second vertical metal segment

40: second signal source

42: Second closed loop

44: System ground plane

D1: first coupling distance

D2: second coupling distance

Claims (9)

A dual-antenna system including: A dielectric substrate; An antenna ground plane; A first antenna, including: A first radiating part having a first end and a second end, the first end extends toward the antenna ground plane and is electrically connected to the antenna ground plane; A first frequency adjustment branch, the two ends of which are respectively electrically connected to the second end of the first radiating part and the antenna ground plane, so that the first radiating part, the first frequency adjustment branch and the antenna ground plane Form a first closed loop; A first coupling part located in the first closed loop and electrically connected to the first radiating part; A first feeding portion located in the first closed loop and having a first coupling distance between the first coupling portion and the first coupling portion; and A first signal source electrically connected to the first feeding portion and the antenna ground plane; and A second antenna is located on the same surface of the dielectric substrate as the first antenna and the antenna ground plane, and the second antenna includes: A second radiating portion having a third end and a fourth end, the third end is adjacent to the first end and extends toward the antenna ground plane and is electrically connected to the antenna ground plane; A second frequency adjustment branch, the two ends of which are respectively electrically connected to the fourth end of the second radiating part and the antenna ground plane, so that the second radiating part, the second frequency adjustment branch and the antenna ground plane Form a second closed loop; A second coupling part located in the second closed loop and electrically connected to the second radiating part; A second feeding portion located in the second closed loop and having a second coupling distance between the second coupling portion; and A second signal source is electrically connected to the second feeding portion and the antenna ground plane. The dual antenna system according to claim 1, further comprising a system ground plane located on one side of the dielectric substrate, and the system ground plane is electrically connected to the antenna ground plane. The dual antenna system according to claim 1, wherein the first frequency adjustment branch has at least one first bending portion; and the second frequency adjustment branch has at least one second bending portion. The dual antenna system according to claim 1, wherein the first frequency adjustment branch has a first inductance element; and the second frequency adjustment branch has a second inductance element. The dual antenna system according to claim 1, wherein the first coupling portion has a first long edge and a second long edge opposite to each other, and the first long edge is electrically connected to the first radiating portion, and the second There is the first coupling distance between the long edge and the first feeding portion; and the second coupling portion has a third long edge and a fourth long edge opposite to each other, and the third long edge is electrically connected to the second The radiating part has the second coupling distance between the fourth long edge and the second feeding part. The dual antenna system according to claim 5, wherein the first coupling portion has a first short edge and a second short edge opposite to each other, and the first short edge is electrically connected to the first radiating portion; and The two coupling parts have a third short edge and a fourth short edge opposite to each other, and the third short edge is electrically connected to the second radiating part. The dual antenna system according to claim 6, wherein the second long edge is a first extension branch extending from the second short edge toward the first frequency adjustment branch; and the fourth long edge is A second extension branch extends from the fourth short edge toward the direction of the second frequency adjustment branch. The dual antenna system according to claim 5, wherein the first feeding portion further includes a first horizontal metal segment and a first vertical metal segment connecting the first horizontal metal segment and the first signal source, and the first There is the first coupling distance between a horizontal metal segment and the second long edge; and the second feed-in portion further includes a second horizontal metal segment and a second horizontal metal segment connecting the second horizontal metal segment and the second signal source. There are two vertical metal segments, and there is the second coupling distance between the second horizontal metal segment and the fourth long edge. The dual antenna system according to claim 1, wherein the minimum distance between the first antenna and the second antenna is 4 mm.

Images