TWM644167U - Dual antenna device - Google Patents

Abstract

This case discloses a dual-antenna device, which includes a dielectric substrate and a first antenna unit, a second antenna unit, a grounding part and an isolation part located thereon. The first antenna unit includes a first radiating part, a second radiating part, a first coupling part and a first signal source, and the second antenna unit includes a third radiating part, a fourth radiating part, a first Two coupling parts and a second signal source, and the grounding part is arranged along the long side of the dielectric substrate, one end of the isolation part is connected to the first radiation part and the third radiation part, and the other end is connected to the grounding part. Therefore, the dual-antenna device has the advantages of downsizing and good isolation at the same time.

Description

dual antenna setup

This case is about a dual-antenna device that can be reduced in size while having good isolation.

It is generally used in the antenna design of notebook computers. Taking Wi-Fi antennas as an example, the antenna width needs to be at least 5 mm. However, as the width of the non-screen area around the screen gradually shrinks, the traditional antenna design cannot meet the current design requirements. appeal. Therefore, how to realize the dual-antenna structure in a limited space is the main design requirement of this case.

This case provides a dual-antenna device, including a dielectric substrate and a grounding part located thereon, a first radiating part, a second radiating part, a first coupling part, a first signal source, a third radiating part, A fourth radiation part, a second coupling part, a second signal source and an isolation part. The dielectric substrate has a first long side and a second long side opposite to each other and a first short side and a second short side opposite to each other. The ground portion is arranged along the first long side. The first radiating portion is disposed along the second long side, the first radiating portion has a first end and a second end, and the first end bends and extends toward the grounding portion. The second radiating portion is located outside the first radiating portion, the second radiating portion has a third end and a fourth end, the third end is close to the second end, and the fourth end extends along the first short side to the first long side side. The first coupling part is disposed between the first radiation part and the ground part. The first signal source is connected to the first coupling part and the grounding part. The third radiating portion is disposed along the second long side, the third radiating portion has a fifth end and a sixth end, the fifth end is bent and extends toward the ground portion, and the fifth end is connected to the first end. The fourth radiating portion is located outside the third radiating portion, the fourth radiating portion has a seventh end and an eighth end, the seventh end is close to the sixth end, and the eighth end extends along the second short side to the first long side side. The second coupling part is disposed between the third radiation part and the ground part. The second signal source is connected to the second coupling part and the grounding part. One end of the isolation part is connected to the first end and the fifth end at the same time, and the other end is connected to the grounding part.

To sum up, this case is a dual-antenna device design, which effectively reduces the size of the antenna by adding an isolation part (lumped element), and easily achieves isolation by adjusting the isolation part (lumped element) demand. Therefore, this case is a simple and low-width dual-antenna device design, which can support multi-band operation and achieve good isolation without increasing the system space of the product, and can provide 2.4 GHz (2400 ~ 2484 MHz) and 5 GHz (5150 ~ 5850 MHz) frequency bands can also easily meet the communication needs of the latest WiFi 6E frequency band (5925 ~ 7125 MHz). gender and competitiveness.

Embodiments of this case will be described below in conjunction with related drawings. In these drawings, the same reference numerals denote the same or similar elements or circuits, it must be understood that although the terms "first", "second", etc. may be used herein to describe various elements, components, regions or functions , but these elements, components, regions or functions should not be limited by these terms, which are only used to distinguish one element, component, region or function from another element, component, region or function.

Please refer to Fig. 1 and Fig. 2 at the same time, the dual antenna device 10 of this case includes a dielectric substrate 12, a ground portion 14, a first radiation portion 16, a second radiation portion 18, a first coupling portion 20, A first signal source 22, a third radiation part 24, a fourth radiation part 26, a second coupling part 28, a second signal source 30 and an isolation part 32, and the ground part 14, the first radiation part 16 , the second radiation part 18, the first coupling part 20, the first signal source 22, the third radiation part 24, the fourth radiation part 26, the second coupling part 28, the second signal source 30 and the isolation part 32 are located on the dielectric substrate 12 on the same surface.

As shown in FIG. 1, in the dual-antenna device 10, the dielectric substrate 12 includes an opposite first long side 121 and a second long side 122 and an opposite first short side 123 and a second short side. Side 124, the first short side 123 connects the same side of the first long side 121 and the second long side 122, and the second short side 124 connects the other side of the first long side 121 and the second long side 122 On the same side, the dielectric substrate 12 can be a rigid board (such as FR4) or a flexible board (such as FPC). The ground portion 14 is located at a middle position on the dielectric substrate 12 and is disposed along the first long side 121 . The first radiating part 16 is located on the dielectric substrate 12 and arranged along the second long side 122. The first radiating part 16 has a first end 161 and a second end 162, and has at least one bend. The first end 161 The second end 162 is bent and extended toward the ground portion 14 , and the second end 162 is extended toward the first short side 123 . The second radiating portion 18 is located on the dielectric substrate 12 and outside the first radiating portion 16, the second radiating portion 18 has a third end 181 and a fourth end 182, and has at least one bend, the third end 181 is along the Set along the second long side 122 and close to the second end 162, the fourth end 182 expands and extends to the first long side 121 along the first short side 123, wherein the length of the first radiation portion 16 is longer than the second radiation The length of the portion 18 , and a first opening 34 is formed between the second end 162 of the first radiating portion 16 and the third end 181 of the second radiating portion 18 . The first coupling portion 20 is located on the dielectric substrate 12 and disposed between the first radiating portion 16 and the grounding portion 14 such that there is a first distance between the first radiating portion 16 and the first coupling portion 20 . The first signal source 22 is connected to the first coupling portion 20 and the ground portion 14 , so as to use the first signal source 22 to send and receive radio frequency signals. The third radiating part 24 is located on the dielectric substrate 12 and arranged along the second long side 122. The third radiating part 24 has a fifth end 241 and a sixth end 242, and has at least one bend. The fifth end 241 The fifth end 241 is bent and extended toward the ground portion 14 , and the fifth end 241 is connected to the first end 161 of the first radiation portion 16 , and the sixth end 242 is extended toward the second short side 124 . The fourth radiating portion 26 is located on the dielectric substrate 12 and outside the third radiating portion 24. The fourth radiating portion 26 has a seventh end 261 and an eighth end 262, and has at least one bend. The seventh end 261 is along the The second long side 122 is arranged and close to the sixth end 242, and the eighth end 262 expands and extends along the second short side 124 to the first long side 121, wherein the length of the third radiating portion 24 is longer than that of the fourth radiating portion 26, and a second opening 36 is formed between the sixth end 242 of the third radiating portion 24 and the seventh end 261 of the fourth radiating portion 26 . The second coupling portion 28 is located on the dielectric substrate 12 and disposed between the third radiating portion 24 and the grounding portion 14 such that there is a second distance between the third radiating portion 24 and the second coupling portion 28 . The second signal source 30 is connected to the second coupling portion 28 and the ground portion 14 , so as to use the second signal source 30 to send and receive radio frequency signals. The isolation portion 32 is located on the dielectric substrate 12 , one end of the isolation portion 32 is connected to the first end 161 of the first radiation portion 16 and the fifth end 241 of the third radiation portion 24 , and the other end of the isolation portion 32 is connected to the ground portion 14 .

In one embodiment, as shown in FIG. 1 and FIG. 2 , the dual-antenna device 10 further includes an antenna ground plane 42, which is adjacent to the first long side 121 of the dielectric substrate 12, so that the fourth side of the second radiating portion 18 The end 182 , the eighth end 262 of the fourth radiating portion 26 and the ground portion 14 are connected to the antenna ground plane 42 .

In one embodiment, the first distance is equal to the second distance.

In one embodiment, as shown in FIG. 1 , the dual-antenna device 10 includes a first antenna unit 38 and a second antenna unit 40 , both of which support multi-frequency operation. Wherein, the first antenna unit 38 includes a first radiating portion 16, a second radiating portion 18, a first coupling portion 20, and a first signal source 22, and the second antenna unit 40 includes a third radiating portion 24, a fourth radiating portion 26 . The second coupling part 28 and the second signal source 30 , so that the isolation part 32 is exactly located between the first antenna unit 38 and the second antenna unit 40 . Wherein, the first antenna unit 38 is mirror-symmetrical to the second antenna unit 40 , so that the first antenna unit 38 and the second antenna unit 40 present symmetrical mirror images on opposite sides of the isolation portion 32 .

In one embodiment, as shown in FIG. 1 , in the dual-antenna device 10 , the isolation part 32 includes at least one lumped element. Wherein, the lumped element is a resistive element, a capacitive element or an inductive element, but the type and combination of the lumped element are not limited thereto. Here, the capacitive element is taken as an example.

In one embodiment, please refer to FIG. 3 , FIG. 4 and FIG. 5 at the same time, the outer side of the first long side 121 of the dielectric substrate 12 of the dual-antenna device 10 is further provided with a system ground plane 44 to make the antenna ground The ground 42 is directly connected to the system ground plane 44 to form an electrical connection. In one embodiment, the system ground plane 44 can be a metal plane of an electronic device. For example, the system ground plane 44 can be a metal frame of the electronic device or a metal sheet or sputtered metal inside the casing of the electronic device. , but this case is not limited to this. For example, when the electronic device is a notebook computer, the system ground plane 44 can be the system ground part of the notebook computer screen or metal parts such as EMI aluminum foil or sputtered metal areas in the notebook computer screen casing.

In another embodiment, please refer to FIG. 6, FIG. 7 and FIG. 8 at the same time, a conductive material 46 is further provided between the antenna ground plane 42 and the system ground plane 44, so as to use the conductive material 46 to connect the antenna ground plane 42 and the system ground plane 44. The system ground plane 44 is used to electrically connect the antenna ground plane 42 and the system ground plane 44 . Wherein, the conductive material 46 can be copper foil, aluminum foil, conductive cloth or conductive glue, etc., but this case is not limited thereto.

In one embodiment, please refer to FIG. 1 and FIG. 2, in the dual antenna device 10, the first radiating portion 16, the second radiating portion 18, the third radiating portion 24 and the fourth radiating portion 26 are bent vertically In addition to the structural design, as long as there is sufficient radiation length, it can also have other structural designs of different shapes. In another embodiment, please refer to FIG. 9 and FIG. 10 at the same time, the third end 181 of the second radiating portion 18 can be bent and extend toward the direction of the first long side 121, and the third end 181 of the fourth radiating portion 26 The seven ends 261 can be bent and extended toward the first long side 121, so that different lengths can be used to affect the coupling areas of the first opening 34 and the second opening 36, so as to generate different coupling amounts to adjust the matching. The rest of the structure It is the same as the embodiment described in the foregoing FIG. 1 , so reference may be made to the foregoing description, and details are not repeated here.

In one embodiment, as shown in FIG. 1 and FIG. Components such as the second coupling portion 28 are made of conductive metal materials, such as silver, copper, aluminum, iron or alloys thereof, but this case is not limited thereto.

Please refer to FIG. 1 and shown in FIG. 9, in the first antenna unit 38 of the dual-antenna device 10, the first radiation part 16, the first coupling part 20, the ground part 14 and the antenna ground plane 42 mainly excite a first In the operation mode, the center frequency is about 2.4 GHz. By changing the length and width of the first radiation part 16, the frequency and matching of the first operation mode can be adjusted. The second radiation part 18, the first coupling part 20, the ground part 14 and the antenna ground plane 42 mainly excite a second operation mode and a third operation mode, and the center frequency of the second operation mode is about 5.7 GHz. The center frequency of the third mode of operation is about 7.3 GHz. These two modes can be combined into one bandwidth to achieve broadband characteristics, and by changing the length, width and relative position of the second radiation part 18, the second radiation part 18 can be adjusted. The frequency and matching of the second mode of operation and the third mode of operation. In the second antenna unit 40 of the dual-antenna device 10, the third radiating part 24, the second coupling part 28, the ground part 14 and the antenna ground plane 42 mainly excite a fourth operating mode, and its center frequency is about 2.4 GHz, by changing the length and width of the third radiation part 24, the frequency and matching of the fourth operation mode can be adjusted. The fourth radiation part 26, the second coupling part 28, the ground part 14 and the antenna ground plane 42 mainly excite a fifth operation mode and a sixth operation mode, and the center frequency of the fifth operation mode is about 5.7 GHz. The center frequency of the sixth mode of operation is about 7.3 GHz. These two modes can be combined into one bandwidth to achieve broadband characteristics, and by changing the length, width and relative position of the fourth radiation part 26, the fourth radiation part 26 can be adjusted. The frequency and matching of the fifth operation mode and the sixth operation mode. Therefore, combining the above six operating modes (the first operating mode to the sixth operating mode), the operating bandwidth of the dual-antenna device 10 can meet Wi-Fi 6E (2.4/5/6 GHz, that is, 2400-2484/ 5150-5825/5925-7125 MHz) tri-band operation.

The dual-antenna device 10 in this case is suitable for general wireless communication devices, especially portable wireless communication devices, such as notebook computers, tablet computers or personal computers, etc., but the applicable devices are not limited thereto. The size of the dual antenna device 10 on the dielectric substrate 12 is 59 mm in length and 3.5 mm in width, which is actually a design structure of a low width dual antenna device 10 .

The dual-antenna device 10 proposed in this case does have good reflection coefficient and isolation. Please refer to Fig. 1 and Fig. 11 at the same time, in this dual-antenna device 10, the size of the entire dual-antenna device 10 is 3.5 mm * 59 mm, and the isolation part 32 is a capacitive element with a capacitance value of 3.5 pF, so that The dual-antenna device 10 performs a simulation analysis of S parameters (including the reflection coefficient curve S ₁₁ /S ₂₂ and the isolation curve S ₂₁ ) during radio frequency signal transmission. When the dual-antenna device 10 operates in the low-frequency band and the high-frequency band respectively, the S-parameter simulation results are shown in Fig. 11. From the reflection coefficient curves (S ₁₁ , S ₂₂ ) shown in Fig. 11, it can be known that the low-frequency When operating in the frequency band and high frequency band, the reflection coefficient curves (S ₁₁ , S ₂₂ ) of the first operation mode to the sixth operation mode shown on the diagram are all less than -6 dB (S ₁₁ , S ₂₂ <-6 dB ), the reflection coefficient curves (S ₁₁ , S ₂₂ ) in the first operation mode and the fourth operation mode are smaller than -10 dB (S ₁₁ , S ₂₂ <-10 dB), which proves that in the low frequency operating band and high frequency The operating frequency bands all have good impedance matching, which can meet the WiFi multi-bands of 2400-2484 MHz, 5150-5850 MHz and 5925-7125 MHz. On the other hand, from the isolation curve S ₂₁ shown in Figure 11, it can be seen that the isolation curve S ₂₁ is less than -17 dB in the frequency band (S ₂₁ <-17 dB), which means that the isolation is higher than 17 dB, which proves that both The antenna device 10 has a good isolation effect between the first operation mode and the fourth operation mode. Based on this, it is different from the traditional way of increasing the antenna isolation by increasing the distance between the two antenna units, or adding a resonance structure with a specific wavelength between the two antenna units. The method used in this case is relatively simple. The total components can easily adjust the frequency of de-isolation, and can effectively reduce the size of the antenna.

To sum up, this case is a dual-antenna device design, which effectively reduces the size of the antenna by adding an isolation part (lumped element), and easily achieves isolation by adjusting the isolation part (lumped element) demand. Therefore, this case is a simple and low-width dual-antenna device design, which can support multi-band operation and achieve good isolation without increasing the system space of the product, and can provide 2.4 GHz (2400 ~ 2484 MHz) and 5 GHz (5150 ~ 5850 MHz) frequency bands can also easily meet the communication needs of the latest WiFi 6E frequency band (5925 ~ 7125 MHz). gender and competitiveness.

The above-mentioned embodiments are only to illustrate the technical ideas and characteristics of this case. Equal changes or modifications made to the disclosed spirit should still be covered within the scope of the patent application in this case.

10: Dual antenna device 12: Dielectric substrate 121 first long side 122: second long side 123: First short side 124: second short side 14: Grounding part 16: The first radiation department 161: first end 162: second end 18: The second radiation department 181: The third end 182: Fourth end 20: The first coupling part 22: The first signal source 24: The third radiation department 241: fifth end 242: sixth end 26: The Fourth Radiant Division 261: seventh end 262: Eighth end 28: The second coupling part 30:Second signal source 32: Isolation Department 34: First opening 36: Second opening 38: The first antenna unit 40: Second antenna unit 42: Antenna ground plane 44: System ground plane 46: Conductive material

FIG. 1 is a schematic structural diagram of a dual-antenna device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a three-dimensional structure of a dual-antenna device according to an embodiment of the present invention. FIG. 3 is a schematic structural diagram of a dual-antenna device connected to a system ground plane according to an embodiment of the present invention. FIG. 4 is a three-dimensional schematic diagram of a dual-antenna device connected to a system ground plane according to an embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of a dual-antenna device connected to a system ground plane according to an embodiment of the present invention. FIG. 6 is a schematic structural diagram of a dual-antenna device connected to a system ground plane according to another embodiment of the present application. FIG. 7 is a three-dimensional structural diagram of a dual-antenna device connected to a system ground plane according to another embodiment of the present application. FIG. 8 is a schematic cross-sectional view of a dual-antenna device connected to a system ground plane according to another embodiment of the present application. FIG. 9 is a schematic structural diagram of a dual-antenna device according to another embodiment of the present application. FIG. 10 is a schematic diagram of a three-dimensional structure of a dual-antenna device according to another embodiment of the present application. FIG. 11 is a schematic diagram of the simulation of the reflection coefficient curve (S ₁₁ and S ₂₂ parameters) and the isolation curve (S ₂₁ parameter) generated by the dual antenna device according to the present application.

10: Dual antenna device

12: Dielectric substrate

121: the first long side

122: second long side

123: First short side

124: second short side

14: Grounding part

16: The first radiation department

161: first end

162: second end

18: The second radiation department

181: The third end

182: Fourth end

20: The first coupling part

22: The first signal source

24: The third radiation department

241: fifth end

242: sixth end

26: The Fourth Radiant Division

261: seventh end

262: Eighth end

28: The second coupling part

30:Second signal source

32: Isolation Department

34: First opening

36: Second opening

38: The first antenna unit

40: Second antenna unit

42: Antenna ground plane

Claims (10)

A dual antenna arrangement comprising: A dielectric substrate having opposite first and second long sides and opposite first and second short sides; a ground portion, located on the dielectric substrate and disposed along the first long side; a first radiating portion, located on the dielectric substrate and disposed along the second long side, the first radiating portion has a first end and a second end, the first end is bent toward the ground portion extend; A second radiating portion, located on the dielectric substrate and outside the first radiating portion, the second radiating portion has a third end and a fourth end, the third end is close to the second end, the fourth end extending along the first short side to the first long side; a first coupling part, located on the dielectric substrate, and disposed between the first radiating part and the grounding part; a first signal source, connected to the first coupling part and the ground part; A third radiating portion, located on the dielectric substrate and disposed along the second long side, the third radiating portion has a fifth end and a sixth end, the fifth end is bent toward the ground portion extending, and the fifth end is connected to the first end; A fourth radiating portion, located on the dielectric substrate and outside the third radiating portion, the fourth radiating portion has a seventh end and an eighth end, the seventh end is close to the sixth end, the eighth end extending along the second short side to the first long side; a second coupling part located on the dielectric substrate and disposed between the third radiating part and the grounding part; a second signal source connected to the second coupling part and the ground part; and An isolation part is located on the dielectric substrate, one end of the isolation part is connected to the first end and the fifth end at the same time, and the other end is connected to the ground part. The dual-antenna device as claimed in item 1, wherein the third end of the second radiating part is more bendable and extends toward the direction of the first long side, and the seventh end of the fourth radiating part is more bendable The fold extends toward the direction of the first long side. The dual-antenna device as described in Claim 1 further includes an antenna ground plane adjacent to the first long side of the dielectric substrate, the fourth end of the second radiating portion, the eighth end of the fourth radiating portion The end and the ground portion are connected to the ground plane of the antenna. The dual-antenna device as claimed in claim 3, wherein the antenna ground plane is further connected to a system ground plane, and the system ground plane is located outside the first long side of the dielectric substrate. The dual-antenna device as claimed in claim 4, wherein the antenna ground plane is connected to the system ground plane through a conductive material. The dual-antenna device as described in Claim 1 further includes a first antenna unit and a second antenna unit, the first antenna unit includes the first radiating part, the second radiating part, the first coupling part and the first signal source, the second antenna unit includes the third radiating part, the fourth radiating part, the second coupling part and the second signal source, so that the isolation part is located in the first antenna unit and the second antenna unit, and the first antenna unit is mirror-symmetrical to the second antenna unit. The dual-antenna device as claimed in claim 1, wherein the isolation part comprises at least one lumped element. The dual-antenna device as claimed in claim 7, wherein the lumped element is a resistive element, a capacitive element or an inductive element. The dual-antenna device as claimed in item 3, wherein the first radiating portion, the first coupling portion, the grounding portion and the antenna ground plane excite a first operating mode, the second radiating portion, the first The coupling part, the ground part and the antenna ground plane excite a second operation mode and a third operation mode. The dual-antenna device as claimed in item 9, wherein the third radiating portion, the second coupling portion, the grounding portion, and the antenna ground plane excite a fourth operating mode, the fourth radiating portion, the second The coupling part, the ground part and the antenna ground plane excite a fifth operation mode and a sixth operation mode.

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