TWM638323U - Multi-frequency dual antenna device - Google Patents

Abstract

This case discloses a multi-frequency dual-antenna device, which includes a first antenna unit, a second antenna unit and a meander isolation part. The first antenna unit includes: a first grounding portion having an opposite first side and a second side; a first radiation portion located on one side of the first side and having a first end and a second side A second end, the first end extends toward the first ground portion; a first integrated element connects the first end and the first ground portion; a second radiation portion is located between the first radiation portion and the first ground portion , and has a third terminal and a fourth terminal, the third terminal extends toward the direction of the first grounding part; the first signal source is connected to the third terminal and the first grounding part. The second antenna unit has a corresponding structural design to that of the first antenna unit, and the meander isolation part is located between the first antenna unit and the second antenna unit.

Description

Multi-frequency dual-antenna device

This case is about a miniaturized multi-frequency dual-antenna device with good isolation.

In recent years, the component layout of notebook computers has continuously reduced the antenna space. In addition, the current high screen-to-body ratio is the mainstream design. The width of the outer border of the screen is only about 4 mm to 6 mm, and the space available for the antenna is greatly reduced. , so that the antenna height is generally lower than the previous 6 mm. Even if the antenna is placed around the keyboard, the space will be squeezed by the increased capacity battery that emphasizes long working time. Therefore, the traditional antenna design method can no longer meet the current design requirements.

Generally used in the dual-antenna system design of notebook computers, the design of the two antenna units side by side can reduce the antenna footprint, but the two antenna units usually have a separation distance of 0.5 times the wavelength of the lowest operating frequency of the low frequency 2.4 GHz ( It is about 62.5 mm) to ensure good isolation between the two antenna elements, but shortening the current separation distance from 62.5 mm to 5 mm will greatly reduce the isolation between antennas, resulting in the inability to have good spatial integration .

This case provides a multi-frequency dual-antenna device, including a first grounding part, a first radiating part, a first integrated element, a second radiating part, a first signal source, a second grounding part, and a third radiating part part, a second integrated element, a fourth radiating part, a second signal source and a meandering isolation part. In the multi-frequency dual antenna device, the first grounding part has a first side and a second side opposite to each other; the first radiation part is located on one side of the first side and has a first end and a second End, the first end of the first radiating part extends toward the direction of the first grounding part; the first integrated element connects the first end and the first grounding part; the second radiating part is located between the first radiating part and the first grounding part , and has a third end and a fourth end, the third end of the second radiation portion extends toward the direction of the first ground portion; the first signal source is connected to the third end and the first ground portion. The second grounding part is parallel to the first grounding part, and has a third side and a fourth side opposite to each other, and the third side is on the same side as the first side; the third radiation part is located on the third side and has a fifth end and a sixth end, the fifth end of the third radiating part extends toward the direction of the second grounding part; the second integrated element connects the fifth end and the second grounding part; the fourth radiating part The part is located between the third radiating part and the second grounding part, and has a seventh end and an eighth end, the seventh end of the fourth radiating part extends toward the direction of the second grounding part; the second signal source is connected to the second Seven ends and the second grounding part. The meandering isolation part is located between the first radiation part and the third radiation part.

In summary, this case is a multi-frequency dual-antenna device design, which reduces the size of a single antenna unit by adding an integrated component design, and uses the back-to-back dual-antenna layout of the two antenna units to achieve a 2.4 GHz solution. For coupling requirements, only a separation distance of 5 mm is required to meet the isolation requirements of the 2.4 GHz band. In addition, in this case, a non-grounded serpentine design is added between the two antenna units to improve the isolation between the two antenna units in the 5 GHz and 6 GHz frequency bands. Therefore, this case is a simple and miniaturized multi-frequency dual-antenna device design, which can achieve good isolation and provide 2.4 GHz (2400 ～2500 MHz) and 5 GHz (5150～5850 MHz) frequency bands, and also meet the characteristic requirements of the latest high-frequency band 6 GHz (5925～7125 MHz) of WiFi 6E.

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 and/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, the multi-frequency dual-antenna device 10 of this case includes a dielectric substrate 12, a first ground portion 14, a first radiation portion 16, a first integrated element 18, a second radiation portion 20, a first signal source 22 , a second ground portion 24 , a third radiating portion 26 , a second integrated element 28 , a fourth radiating portion 30 , a second signal source 32 and a meandering isolation portion 34 , and The first grounding part 14, the first radiating part 16, the first integrated element 18, the second radiating part 20, the first signal source 22, the second grounding part 24, the third radiating part 26, the second integrated element 28, the fourth The radiation part 30 , the second signal source 32 and the meandering isolation part 34 are located on the same surface of the dielectric substrate 12 .

As shown in FIG. 1, in the multi-frequency dual antenna device 10, the dielectric substrate 12 includes a first long side 121 opposite to a second long side 122 and a first short side 123 opposite to a first long side 122. Two short sides 124, the first short side 123 connects the same side of the first long side 121 and the second long side 122, the second short side 124 connects the first long side 121 and the second long side 122 the other same side. The first ground portion 14 is close to the first short side 123 and adjacent to the first long side 121, so as to be disposed along the first long side 121. The first ground portion 14 has an opposite first side 141 and A second side 142 , so that the first long side 121 of the dielectric substrate 12 is adjacent to the second side 142 . The first radiation portion 16 is located on one side of the first side 141 of the first ground portion 14, and the first radiation portion 16 has a first end 161 and a second end 162, the first end of the first radiation portion 16 161 is close to the central position and extends toward the direction of the first grounding portion 14 , and the second end 162 of the first radiation portion 16 is close to the first short side 123 . One end of the first integrated element 18 is connected to the first end 161 of the first radiation portion 16 , and the other end of the first integrated element 18 is connected to the first ground portion 14 . The second radiation portion 20 is located between the first radiation portion 16 and the first ground portion 14 and close to the first radiation portion 16, the second radiation portion 20 has a third end 201 and a fourth end 202, the second radiation The third end 201 of the portion 20 extends toward the first ground portion 14 , and the fourth end 202 of the second radiating portion 20 is close to the first short side 123 . One end of the first signal source 22 is connected to the third end 201 of the second radiation portion 20 , and the other end of the first signal source 22 is connected to the first ground portion 14 to be grounded, so that the first signal source 22 can be used to send and receive radio frequency signals.

Please continue to refer to FIG. 1, the second ground portion 24 is juxtaposed with the first ground portion 14, and the second ground portion 24 is located on the dielectric substrate 12 close to the second short side 124 and adjacent to the first long side 121, so that Arranged along the first long side 121, the second ground portion 24 has a third side 241 and a fourth side 242 opposite to each other, and the third side 241 and the first side of the first ground portion 14 141 on the same side, and the fourth side 242 is adjacent to the first long side 121 of the dielectric substrate 12 . The third radiation portion 26 is located on one side of the third side 241 of the second ground portion 24, and the third radiation portion 26 has a fifth end 261 and a sixth end 262, the fifth end of the third radiation portion 26 261 is close to the central position and extends toward the direction of the second grounding portion 24, and the sixth end 262 of the third radiating portion 26 is close to the second short side 124. In one embodiment, the first radiating portion 16 and the third radiating portion The distance D between 26 is 5 millimeters apart. One end of the second integrated element 28 is connected to the fifth end 261 of the third radiation portion 26 , and the other end of the second integrated element 28 is connected to the second ground portion 24 . The fourth radiating portion 30 is located between the third radiating portion 26 and the second grounding portion 24 and close to the third radiating portion 26, the fourth radiating portion 30 has a seventh end 301 and an eighth end 302, the fourth radiating portion The seventh end 301 of the fourth radiating portion 30 extends toward the second ground portion 24 , and the eighth end 302 of the fourth radiating portion 30 is close to the second short side 124 . One end of the second signal source 32 is connected to the seventh end 301 of the fourth radiation part 30 , and the other end of the second signal source 32 is connected to the second ground part 24 and grounded, so that the second signal source 32 can be used to send and receive radio frequency signals. The meandering isolation portion 34 is located at the center of the dielectric substrate 12 and between the first radiating portion 16 and the third radiating portion 26 to isolate the first radiating portion 16 and the third radiating portion 26 and prevent the first radiating portion 16 from There will be a near-field coupling current path passing between the third radiating portion 26 and cause interference.

In the embodiment shown in FIG. 1 , the first end 161 of the first radiation portion 16 is vertically bent and extended to connect to the first integrated element 18, and the third end 201 of the second radiation portion 20 is vertically bent and extended to Connected to the first signal source 22, the fifth end 261 of the third radiation portion 26 is vertically bent and extended to be connected to the second integrated element 28, and the seventh end 301 of the fourth radiation portion 30 is vertically bent and extended to be connected to the second signal source 32 .

In one embodiment, as shown in FIG. 1 , the multi-frequency dual-antenna device 10 includes a first antenna unit 36 and a second antenna unit 38 , both of which operate at multiple frequencies. Wherein, the first antenna unit 36 includes the first grounding portion 14, the first radiating portion 16, the first integrated element 18, the second radiating portion 20 and the first signal source 22, and the second antenna unit 38 includes the second grounding portion 24. The third radiating part 26, the second integrated element 28, the fourth radiating part 30 and the second signal source 32, so that the meandering isolation part 34 is exactly located at the first antenna unit 36 (the first radiating part 16) and the second There is no connection between the antenna units 38 (the third radiating portion 26 ), and between the first antenna unit 36 and the second antenna unit 38 . Wherein, the first antenna unit 36 is mirror-symmetrical to the second antenna unit 38 , so that the first antenna unit 36 and the second antenna unit 38 present symmetrical mirror images on opposite sides of the meandering isolation portion 34 .

In this case, the design of a meandering isolation part 34 is added between the first antenna unit 36 and the second antenna unit 38. The meandering isolation part 34 is a non-ground design, and the total length is about a high-frequency operating frequency (such as 5.36 GHz), the length of 0.5 times the wavelength, and the addition of the meander isolation part 34 does not change the resonance mode of the multi-frequency dual-antenna device 10 at low frequency (2.4 GHz).

In one embodiment, as shown in FIG. 1 , in the multi-frequency dual-antenna device 10 , the first integrated element 18 and the second integrated element 28 are respectively an inductance element. Wherein, the inductance value of the first integrated component 18 is 3.9 nH˜6.2 nH, and the inductance value of the second integrated component 28 is 3.9 nH˜6.2 nH.

In one embodiment, as shown in FIG. 1 , in the first antenna unit 36 , the length of the first radiation portion 16 is 0.1 times the wavelength of the low frequency operating frequency. In the second antenna unit 38, the length of the third radiation portion 26 is 0.1 times the wavelength of the low frequency operating frequency.

In one embodiment, please refer to FIG. 2, the outer side of the first long side 121 of the dielectric substrate 12 of the multi-frequency dual-antenna device 10 is further provided with a system ground plane 40, so that the first ground portion 14 of the second The two sides 142 and the fourth side 242 of the second ground portion 24 are electrically connected to the system ground plane 40 . In one embodiment, the system ground plane 40 can be an independent metal sheet, or it can be located on a metal plane of an electronic device. For example, the system ground plane 40 can be a metal frame of the electronic device or inside the casing of the electronic device. The metal sheet or sputtered metal part, but this case is not limited to this. For example, when the electronic device is a notebook computer, the system ground plane 40 may be the system ground portion of the notebook computer screen or metal parts such as EMI aluminum foil or sputtered metal areas in the notebook computer screen casing. Wherein, the shape and size of the system ground plane 40 drawn in the drawings are only for illustration, and the shape or size of the system ground plane 40 may be changed along with the application of the multi-frequency dual-antenna device 10. limit.

In the multi-frequency dual-antenna device 10, the first radiating part 16, the second radiating part 20, the third radiating part 26 and the fourth radiating part 30, in addition to the vertically bent structural design, only need a sufficient radiation length. Other structural designs of different shapes are possible. In another embodiment, as shown in FIG. 3 , the first end 161 of the first radiating portion 16 is bent and extended to connect to the first integrated element 18 , and the third end 201 of the second radiating portion 20 is bent and extended to be connected. The first signal source 22, the fifth end 261 of the third radiation part 26 is bent and extended to connect the second integrated element 28, and the seventh end 301 of the fourth radiation part 30 is bent and extended to connect the second signal source 32, and the rest The structure is the same as the above-mentioned embodiment described in FIG. 1 , so reference can be made to the above-mentioned description, and no more details are given here.

In one embodiment, as shown in FIG. 1 and FIG. Elements such as the meandering isolation portion 34 are made of conductive metal materials, such as silver, copper, aluminum, iron or alloys thereof, but the present case is not limited thereto.

In the multi-frequency dual-antenna device 10 of this case, please refer to Fig. 1, Fig. 4 and Fig. 5 at the same time, the first integrated element 18 uses an inductance element with an inductance value of 4.7 nH, and the second integrated element 28 uses an inductance value Inductive element of 4.7 nH. Take the second antenna unit 38 as an example. When operating in the low frequency band, actually take 2.442 GHz as an example. As shown in FIG. It is coupled to the third radiation part 26 and reaches the second ground part 24 through the second integrated element 28 to form a low-frequency resonance path. By adjusting the second integrated component 28, the center frequency of the low frequency 2.4 GHz can be adjusted independently without affecting the bandwidth of 2.4 GHz and the characteristics of the high frequency 5/6 GHz. And with the symmetrical back-to-back design of the first antenna unit 36 and the second antenna unit 38 , it can be found that the present case has good inherently decoupled characteristics at a low frequency of 2.4 GHz. Furthermore, the second integrated component 28 can reduce the size of the multi-frequency dual-antenna device 10, so that the total length of the third radiating part 26 only needs to be 0.1 times the wavelength of the low-frequency operating frequency, which can reduce the length of the third radiating part 26 more than the common 0.25 times the wavelength structure. The dimensions of the two antenna elements 38 . When the second antenna unit 38 operates in the high frequency band (5/6 GHz), actually take 6.140 GHz as an example, as shown in FIG. 5, the second signal source 32 generates a radio frequency signal, and feeds the radio frequency signal into the fourth radiation The part 30 resonates to form a high-frequency resonance path. Among them, in order to improve the isolation of the high-frequency band, this case adds the design of the meandering isolation part 34 without grounding between the first antenna unit 36 and the second antenna unit 38. When the second antenna unit 38 operates at high In the frequency band, the serpentine isolation part 34 has absorbed the near-field coupling energy toward the first antenna unit 36, so it will not affect the first antenna unit 36, so as to avoid the coupling resonance of the first antenna unit 36, which can Refer to the surface current distribution in Figure 5. In addition, the operating principle of the first antenna unit 36 is the same as that of the aforementioned second antenna unit 38 , so reference can be made to the aforementioned description, and details are not repeated here.

The multi-frequency dual-antenna device 10 proposed in this case does have good reflection coefficient and isolation. Please refer to Fig. 2 and Fig. 6 at the same time, in this multi-frequency dual-antenna device 10, the size of the entire multi-frequency dual-antenna device 10 is 5 mm * 25 mm (125 mm ² ), the first integrated component 18 and the second The inductance value of the two integrated components 28 is 4.7 nH, and the multi-frequency dual-antenna device 10 is used for the simulation analysis of the S parameters (including the reflection coefficient S11/S22 and the transmission coefficient S21 ) when the radio frequency signal is transmitted. When the multi-frequency 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. 6 respectively. It can be known from the reflection coefficient curves (S11, S22) shown in Fig. The reflection coefficients (S11, S22) displayed on the diagram are all less than -6 dB (S11, S22 <-6 dB) in the frequency band and high frequency operating band, which proves that both the low frequency operating band and the high frequency operating band have good performance. Impedance matching can meet the WiFi multi-band of 2400-2500 MHz, 5150-5850 MHz and 5925-7125 MHz. On the other hand, from the transmission coefficient (S21) shown in FIG. 6, it can be seen that when the multi-frequency dual-antenna device 10 operates in the low-frequency operating frequency band and the high-frequency operating frequency band, the antenna transmission coefficient in the low-frequency operating frequency band can be less than -13 dB (S21 <-13 dB), it shows that the antenna transmission coefficient can be less than -10 dB in the high-frequency operating frequency band (S21<-10 dB), which proves that it has good isolation in both the low-frequency operating frequency band and the high-frequency operating frequency band. Therefore, the multi-frequency dual-antenna device 10 of the present application has good isolation in both the low-frequency operating frequency band and the high-frequency operating frequency band.

In summary, this case is a multi-frequency dual-antenna device design, which reduces the size of a single antenna unit by adding an integrated component design, and uses the back-to-back dual-antenna layout of the two antenna units to achieve a 2.4 GHz solution. For coupling requirements, only a separation distance of 5 mm is required to meet the isolation requirements of the 2.4 GHz band. In addition, in this case, a non-grounded serpentine design is added between the two antenna units to improve the isolation between the two antenna units in the 5 GHz and 6 GHz frequency bands. Therefore, this case is a simple and miniaturized multi-frequency dual-antenna device design, which can achieve good isolation and provide 2.4 GHz (2400 ~ 2500 MHz) and 5 GHz (5150 ~ 5850 MHz) frequency bands, and also meet the characteristic requirements of the latest high frequency band 6 GHz (5925 ~ 7125 MHz) of WiFi 6E.

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: Multi-frequency dual-antenna device 12: Dielectric substrate 121: the first long side 122: second long side 123: First short side 124: second short side 14: The first grounding part 141: first side 142: second side 16: The first radiation department 161: first end 162: second end 18: The first integrated component 20: The second radiation department 201: Third end 202: Fourth end 22: The first signal source 24: Second grounding part 241: third side 242: Fourth side 26: The third radiation department 261: fifth end 262: sixth end 28: The second integrated component 30: The Fourth Radiant Division 301: seventh end 302: Eighth end 32:Second signal source 34: Serpentine Isolation Department 36: The first antenna unit 38: Second antenna unit 40: System ground plane D: distance

FIG. 1 is a schematic structural diagram of a multi-frequency dual-antenna device according to an embodiment of the present invention. FIG. 2 is a structural diagram of a multi-frequency dual-antenna device connected to a system ground plane according to an embodiment of the present invention. FIG. 3 is a schematic structural diagram of a multi-frequency dual-antenna device according to another embodiment of the present application. FIG. 4 is a distribution diagram of the surface current path excited at 2.442 GHz by the second signal source of the multi-frequency dual-antenna device according to an embodiment of the present invention. FIG. 5 is a distribution diagram of the surface current path excited at 6.14 GHz by the second signal source of the multi-frequency dual-antenna device according to an embodiment of the present invention. FIG. 6 is a schematic diagram of a simulation of reflection coefficients (S11 and S22 parameters) and transmission coefficients (S21 parameters) generated by the multi-frequency dual-antenna device according to the present application.

10: Multi-frequency dual-antenna device

12: Dielectric substrate

121: the first long side

122: second long side

123: First short side

124: second short side

14: The first grounding part

141: first side

142: second side

16: The first radiation department

161: first end

162: second end

18: The first integrated component

20: The second radiation department

201: Third end

202: Fourth end

22: The first signal source

24: Second grounding part

241: third side

242: Fourth side

26: The third radiation department

261: fifth end

262: sixth end

28: The second integrated component

30: The Fourth Radiant Division

301: seventh end

302: Eighth end

32:Second signal source

34: Serpentine Isolation Department

36: The first antenna unit

38: Second antenna unit

D: distance

Claims (11)

A multi-frequency dual-antenna device, comprising: a first ground portion having a first side and a second side opposite to each other; a first radiating part, located on one side of the first side, and has a first end and a second end, the first end of the first radiating part extends towards the direction of the first grounding part; a first integrated component, connected to the first end and the first ground portion; a second radiating portion, located between the first radiating portion and the first grounding portion, and has a third end and a fourth end, the third end of the second radiating portion faces toward the first grounding portion direction extension; a first signal source connected to the third terminal and the first ground; a second ground portion, which is juxtaposed with the first ground portion, and has a third side opposite to a fourth side, and the third side is on the same side as the first side; a third radiating part, located on one side of the third side, and has a fifth end and a sixth end, the fifth end of the third radiating part extends toward the second grounding part; a second integrated component connected to the fifth terminal and the second ground portion; A fourth radiating portion, located between the third radiating portion and the second grounding portion, and has a seventh end and an eighth end, the seventh end of the fourth radiating portion faces toward the second grounding portion direction extension; a second signal source connected to the seventh end and the second ground; and A meandering isolation part is located between the first radiating part and the third radiating part. The multi-frequency dual-antenna device as described in Claim 1 further includes a dielectric substrate, the first grounding part, the first radiating part, the first integrated element, the second radiating part, the first signal source, the The second grounding part, the third radiating part, the second integrated element, the fourth radiating part, the second signal source and the meandering isolation part are located on the dielectric substrate, and the first grounding part of the first The two sides and the fourth side of the second ground portion are adjacent to a long side of the dielectric substrate. The multi-frequency dual-antenna device as described in claim 2 further includes a system ground plane located on the long side of the dielectric substrate and electrically connected to the second side of the first ground part and the second ground The fourth side of the section. The multi-frequency 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 grounding part, the first radiating part, the second antenna unit An integrated element, the second radiating part and the first signal source, the second antenna unit includes the second grounding part, the third radiating part, the second integrated element, the fourth radiating part and the second For a signal source, the meandering isolation part is located between the first antenna unit and the second antenna unit, and the first antenna unit is mirror-symmetrical to the second antenna unit. The multi-frequency dual-antenna device as described in claim 4, wherein the first end of the first radiating part is vertically bent and extended to connect to the first integrated element; the third end of the second radiating part is vertically bent The fifth end of the third radiating part is bent and extended vertically to connect the second integrated element; and the seventh end of the fourth radiating part is extended and bent vertically Connect the second signal source. The multi-frequency dual-antenna device as described in Claim 4, wherein the first end of the first radiating part is bent and extended to connect to the first integrated element; the third end of the second radiating part is bent and extended to be connected The first signal source; the fifth end of the third radiating part is bent and extended to connect with the second integrated element; and the seventh end of the fourth radiating part is bent and extended to be connected to the second signal source. The multi-frequency dual-antenna device as claimed in claim 1 or 4, wherein the length of the meandering isolation part is 0.5 times the wavelength of the high-frequency operating frequency. The multi-frequency dual-antenna device as claimed in claim 1, wherein the length of the first radiating part is 0.1 times the wavelength of the low-frequency operating frequency. The multi-frequency dual-antenna device as claimed in Claim 1, wherein the length of the third radiating part is 0.1 times the wavelength of the low-frequency operating frequency. The multi-frequency dual-antenna device as claimed in claim 1, wherein the first integrated element and the second integrated element are an inductance element. The multi-frequency dual-antenna device as claimed in claim 1, wherein the distance between the first radiating part and the third radiating part is 5 millimeters apart.

Images