WO2023273682A1

WO2023273682A1 - Dual-frequency dual-feed omnidirectional high-gain antenna, chip, and wireless communication device

Info

Publication number: WO2023273682A1
Application number: PCT/CN2022/093901
Authority: WO
Inventors: 马良; 刘杰; 李孜
Original assignee: 华为技术有限公司
Priority date: 2021-06-29
Filing date: 2022-05-19
Publication date: 2023-01-05
Also published as: CN115548657A

Abstract

The present application provides a dual-frequency dual-feed omnidirectional high-gain antenna, a chip, and a wireless communication device. The antenna comprises a circuit board, at least two low-frequency dipole elements, at least two high-frequency dipole elements, and branches. The low-frequency dipole elements are disposed on a first surface of the circuit board, and the high-frequency dipole elements are disposed on a second surface of the circuit board. The adjacent low-frequency dipole elements are connected by a first transmission line. The low-frequency dipole element comprises a first low-frequency dipole element, and the first low-frequency dipole element is electrically connected to a first feeder. The frequency of signals transmitted by the high-frequency dipole elements is higher than the frequency of signals transmitted by the low-frequency dipole elements. The first low-frequency dipole element comprises a first oscillator arm and a second oscillator arm. The branch is disposed between the first oscillator arm and the second oscillator arm. The branch comprises a partition portion extending in a second direction, and the second direction is perpendicular to a first direction. The branch is connected between the first transmission line and the first feeder.

Description

A dual-frequency double-feed omnidirectional high-gain antenna, chip and wireless communication equipment

Cross References to Related Applications

This application claims the priority of the Chinese patent application submitted to the State Intellectual Property Office of China on June 29, 2021, with the application number 202110727973.5, and the title of the application is "a dual-frequency double-feed omnidirectional high-gain antenna, chip and wireless communication equipment" , the entire contents of which are incorporated in this application by reference.

technical field

The present application relates to the technical field of antennas, specifically a dual-frequency double-feed omnidirectional high-gain antenna, a chip and a wireless communication device.

Background technique

Compared with mobile networks, Wireless Fidelity (Wi-Fi) technology uses unlicensed wireless spectrum, which inherently has low cost advantages. With the improvement and popularization of the signal rate of Wi-Fi, the number of applications of Wi-Fi devices is increasing.

As the signal rate requirements for Wi-Fi are getting higher and higher, the transmission rate of the 2.4G frequency band of the antenna can no longer meet the market demand. Therefore, a dual-band antenna combining the 2.4G frequency band and the 5G frequency band has been promoted. The dual-frequency antenna includes a low-frequency oscillator for transmitting 2.4G signals and a high-frequency oscillator for transmitting 5G signals. The above-mentioned low-frequency oscillator and high-frequency oscillator are arranged on both sides of the printed circuit board. However, although the dual-band antenna can support signal transmission in two frequency bands, the high-frequency oscillators and low-frequency oscillators located on both sides of the printed circuit board are also prone to crosstalk, and the signal isolation of the dual-band antenna is poor.

Contents of the invention

The application provides a dual-frequency double-feed omnidirectional high-gain antenna, a chip and a wireless communication device. The isolation of different frequency signals of the antenna is high, and the communication effect of the wireless communication device is better.

In the first aspect, the dual-frequency dual-feed omnidirectional high-gain antenna provided by the present application includes a circuit board, at least two low-frequency dipole dipoles, at least two high-frequency dipole dipoles and branches. The two opposite surfaces of the circuit board are respectively the first surface and the second surface. At least two low-frequency dipole vibrators are arranged on the first surface of the above-mentioned circuit board. Specifically, the above-mentioned at least two low-frequency dipole vibrators are sequentially arranged on the above-mentioned second surface along the first direction. Any adjacent low-frequency dipole dipoles are connected through a first transmission line. The at least two low-frequency dipole dipoles include a first low-frequency dipole dipole, which is located at the end of the antenna and electrically connected to the first feeder, so as to realize signal transmission. At least two high-frequency dipole oscillators are arranged on the second surface of the circuit board, and the at least two high-frequency dipole oscillators are sequentially arranged on the second surface along the first direction. Any adjacent high-frequency dipole dipoles are electrically connected through the second transmission line. The at least two high-frequency dipole dipoles include a first high-frequency dipole dipole, and the first high-frequency dipole dipole is located at the end of the antenna and is electrically connected to the second feeder, so as to realize signal transmission. The frequency of the signal transmitted by the high-frequency dipole oscillator is higher than the frequency of the signal transmitted by the low-frequency dipole oscillator. The above-mentioned first low-frequency dipole dipole includes a first dipole arm and a second dipole arm arranged along a first direction. The branches of the antenna are arranged between the first dipole arm and the second dipole arm. The branch has an isolation portion extending along a second direction, and the second direction is perpendicular to the first direction, that is to say, the isolation portion can completely isolate the first dipole arm and the second dipole arm. The stub is connected between the first transmission line and the first feeder line. The isolation part forms a high-impedance state between the first dipole arm and the second dipole arm. For the first low-frequency dipole oscillator, the isolation part can suppress the high-frequency energy on the second surface of the circuit board from being coupled to the first surface at the port, reducing the crosstalk of the oscillators on both sides of the circuit board. Improve the isolation between the high-frequency dipole oscillator and the low-frequency dipole oscillator at the port to achieve the purpose of improving the performance of the antenna.

The above branches may specifically be T-shaped branches. The T-shaped branch includes an isolation portion and a connection portion, the isolation portion extends along two directions, and the connection portion extends along a first direction. The first transmission line is connected to the isolation part, and the first feeder line is connected to the connection part. Alternatively, the first transmission line is connected to the connection part, and the first feeder line is connected to the isolation part. This solution thus facilitates the connection of stubs to other structures.

One of the first transmission line and the second transmission line may be a coplanar microstrip transmission line, and the coplanar microstrip transmission line may be printed on the surface of the circuit board, thereby reducing costs.

In addition, in order to prevent the coplanar microstrip transmission lines on both sides of the circuit board from causing obvious crosstalk, one of the first transmission line and the second transmission line can be a coplanar microstrip transmission line, and the other can be a coaxial jumper .

When the first transmission line is a coplanar microstrip transmission line, the coplanar microstrip transmission line has a first hollow structure. The first hollow structure forms a high-frequency stop band, thereby reducing the crosstalk between the signal of the high-frequency dipole oscillator and the signal of the low-frequency dipole oscillator. In addition, disposing the first hollow structure on the coplanar microstrip transmission line is also conducive to the transmission of low-frequency signals. Therefore, this solution improves the isolation between the high-frequency dipole oscillator and the low-frequency dipole oscillator, and can also increase the gain of the antenna.

The specific shape of the above-mentioned first hollow structure is not limited, and may be a U-shaped first hollow structure. Therefore, more first hollow structures can be provided along the extension direction of the coplanar microstrip transmission line to improve the decoupling effect for high-frequency signals.

The total length of the above-mentioned first hollow structure is half of the medium wavelength of the high-frequency dipole oscillator. Then the first hollow structure can reduce the interference of high-frequency signals in a targeted manner, and can form a high-frequency stop band on the coplanar microstrip transmission line, making the high-frequency pattern of the dual-frequency double-fed omnidirectional antenna more regular, to solve the problem of The problem of abnormal frequency pattern.

When specifically setting the coplanar microstrip transmission line, the second transmission line may be a coplanar microstrip transmission line, and the coplanar microstrip transmission line has a second hollow structure. The second hollow structure forms a low-frequency stop band, thereby reducing the crosstalk between the signal of the low-frequency dipole oscillator and the signal of the high-frequency dipole oscillator. In addition, disposing the second hollow structure on the coplanar microstrip transmission line is also conducive to the transmission of high-frequency signals. Therefore, this solution improves the isolation between the high-frequency dipole oscillator and the low-frequency dipole oscillator, and can also increase the gain of the antenna.

The specific shape of the above-mentioned second hollow structure is not limited, and may be a U-shaped second hollow structure. Therefore, more second hollow structures can be arranged along the extension direction of the coplanar microstrip transmission line, so as to improve the decoupling effect for low-frequency signals.

The total length of the second hollow structure is half of the medium wavelength of the low-frequency dipole oscillator. The second hollow structure can specifically reduce the interference of high-frequency signals, and can form a low-frequency stop band on the coplanar microstrip transmission line, making the low-frequency pattern of the dual-frequency double-fed omnidirectional antenna more regular to solve the problem of different frequencies. The problem of malformed pattern.

Specifically, when the low-frequency dipole oscillator is provided, the oscillator arm of the low-frequency dipole oscillator has a third hollow structure. The third hollow structure can form a high-frequency stop band, which can increase the gain of the antenna, and can also improve the isolation between the high-frequency dipole oscillator and the low-frequency dipole oscillator.

When the above-mentioned third hollow structure is specifically provided, the specific shape of the third hollow structure is not limited, and may be a U-shaped third hollow structure. Since the total length of the third hollow structure is usually a fixed length, when the U-shaped third hollow structure is set on the vibrator arm of the low-frequency dipole vibrator, a large number of U-shaped third hollow structures can be set to improve The decoupling effect increases the gain of the antenna.

The total length of the third hollow structure is half of the medium wavelength of the high-frequency dipole oscillator. This solution enables the third hollow structure to specifically reduce the interference generated by the high-frequency dipole oscillator. In addition, each low-frequency dipole dipole includes the above-mentioned third hollow structure, so that the high-frequency pattern of the dual-frequency double-fed omnidirectional antenna can be made more regular, so as to solve the problem of deformed pattern of different frequencies.

When specifically setting the above-mentioned high-frequency dipole vibrator, the high-frequency dipole vibrator includes a third dipole arm and a fourth dipole arm arranged along the first direction, and the third dipole arm faces one side of the fourth dipole arm. The side has a first sawtooth portion, and the side of the fourth vibrator arm facing the third dipole arm has a second sawtooth portion. The first sawtooth part and the second sawtooth part are coupled, that is, the third dipole arm and the fourth dipole arm of the high-frequency dipole dipole adopt sawtooth coupling. In this solution, the coupling degree of the third dipole arm and the fourth dipole arm is better, and the degrees of freedom and matching are also better, so that the energy conversion efficiency of the high-frequency dipole oscillator is better, which is beneficial to increase the gain.

In a specific technical solution, first low-frequency dipole vibrators and second low-frequency dipole vibrators are sequentially arranged on the first surface of the above-mentioned circuit board along the first direction, and first low-frequency dipole vibrators are sequentially arranged on the second surface along the second direction. A high-frequency dipole oscillator, a second high-frequency dipole oscillator, a third high-frequency dipole oscillator, and a fourth high-frequency dipole oscillator. The center of the first low-frequency dipole oscillator overlaps with the center of the first high-frequency dipole oscillator, and the center of the second low-frequency dipole oscillator overlaps with the center of the third high-frequency dipole oscillator. The positions of the second high-frequency dipole oscillator and the fourth high-frequency dipole oscillator are not limited, and the four high-frequency dipole oscillators may be evenly or unevenly distributed. Adopting this scheme to lay out the low-frequency dipole oscillator and the high-frequency dipole oscillator is beneficial to save the space of the antenna.

In the second aspect, the present application provides a wireless communication device. The specific type of the wireless communication device is not limited. It only needs to have the dual-frequency double-feed omnidirectional high-gain antenna in the above technical solution, and utilize the dual-frequency double-feed omnidirectional High-gain antenna enables wireless communication. Specifically, the foregoing wireless communication device may be devices such as routers and set-top boxes. The wireless communication device above includes a casing, a control circuit, and the dual-frequency dual-feed omnidirectional high-gain antenna provided in the first aspect. The above-mentioned control circuit and the dual-frequency double-feed omnidirectional high-gain antenna are arranged in the casing, and the control circuit is electrically connected to the dual-frequency double-feed omnidirectional high-gain antenna. Since the dual-frequency dual-feed omnidirectional high-gain antenna has higher isolation and higher gain, the communication effect of the wireless communication device is better.

In a third aspect, the present application provides a chip, which includes a control circuit and the dual-frequency dual-feed omnidirectional high-gain antenna in any of the above technical solutions. The above-mentioned control circuit is electrically connected with the dual-frequency double-feed omnidirectional high-gain antenna, and the above-mentioned dual-frequency double-feed omnidirectional high-gain antenna is used to transmit the input and output signals of the control circuit. In this solution, the dual-frequency dual-feed omnidirectional high-gain antenna has high isolation and high gain, so the communication effect of the chip is relatively good.

Description of drawings

FIG. 1 is a schematic diagram of a side structure of a dual-frequency dual-feed omnidirectional high-gain antenna in an embodiment of the present application;

FIG. 2 is a structural representation of the first surface of the dual-frequency dual-feed omnidirectional high-gain antenna in the embodiment of the present application;

FIG. 3 is a structural representation of the second surface of the dual-frequency dual-feed omnidirectional high-gain antenna in the embodiment of the present application;

Fig. 4 is a kind of partial enlarged view of place A in Fig. 2;

Fig. 5 is another structural representation of the second surface of the dual-frequency dual-feed omnidirectional high-gain antenna in the embodiment of the present application;

FIG. 6 is another structural schematic diagram of the first surface of the dual-frequency dual-feed omnidirectional high-gain antenna in the embodiment of the present application;

FIG. 7 is another structural schematic diagram of the second surface of the dual-frequency dual-feed omnidirectional high-gain antenna in the embodiment of the present application;

Fig. 8 is a partial enlarged view of place B in Fig. 7;

9 is an in-band pattern of the vertical plane of the low-frequency signal when the low-frequency gain of the antenna in the embodiment of the present application reaches 4.6dBi;

Fig. 10 is the in-band pattern of the vertical plane of the high-frequency signal when the high-frequency gain of the antenna in the embodiment of the present application reaches 8.26dBi;

FIG. 11 is a relationship diagram between the S parameter and the working frequency of the antenna in the embodiment of the present application;

12 is an in-band pattern of the vertical plane of the low-frequency signal when the low-frequency gain of the antenna in the embodiment of the present application reaches 4.4dBi;

Fig. 13 is the in-band pattern of the vertical plane of the high-frequency signal when the high-frequency gain of the antenna in the embodiment of the present application reaches 8.43dBi;

FIG. 14 is a relationship diagram between the S parameters and the working frequency of the antenna in the embodiment of the present application.

Reference signs:

1-circuit board; 11-first surface;

12-Second surface; 2-Low frequency dipole vibrator;

21-the first low-frequency dipole oscillator; 211-the first oscillator arm;

212-the second dipole arm; 22-the second low-frequency dipole oscillator;

23-The third hollow structure; 3-High-frequency dipole vibrator;

31-the first high-frequency dipole oscillator; 32-the second high-frequency dipole oscillator;

33-the third high-frequency dipole oscillator; 34-the fourth high-frequency dipole oscillator;

35-the third vibrator arm; 351-the first sawtooth part;

36-the fourth vibrator arm; 361-the second sawtooth part;

4-the first transmission line; 5-the first feeder line;

6-Second transmission line; 7-Second feeder line;

8-branch; 81-isolation department;

82-Connection part; 10-Coplanar microstrip transmission line;

101-the first hollow structure;

20-coaxial jumper wire.

detailed description

In order to facilitate understanding of the dual-frequency dual-feed omnidirectional high-gain antenna, chip, and wireless communication device provided in the embodiments of the present application, the application scenarios thereof are introduced below. With the development of wireless communication technology, the performance requirements for antennas are getting higher and higher. The above-mentioned antenna is usually set in a wireless communication device, and the wireless communication device is more and more widely used in production and life, and the performance of the antenna plays a decisive role in the performance of the wireless communication device. In order to make the antenna have a better signal rate, there is a dual-frequency antenna in the prior art. Dual-band antennas usually prepare 2.4G oscillators on one side of the printed circuit board and 5G oscillators on the other side. During the working process of the oscillators in the two frequency bands, signal coupling may occur, resulting in low isolation of the antenna, small gain, and distortion of the pattern.

The terms used in the following examples are for the purpose of describing particular examples only, and are not intended to limit the application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also Expressions such as "one or more" are included unless the context clearly dictates otherwise.

Reference to "one embodiment" or "a particular embodiment" or the like described in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. The terms "including", "comprising", "having" and variations thereof mean "including but not limited to", unless specifically stated otherwise.

Figure 1 is a schematic diagram of a side structure of a dual-frequency double-feed omnidirectional high-gain antenna in an embodiment of the present application. As shown in Figure 1, the dual-frequency double-feed omnidirectional high-gain antenna includes a circuit board, and the circuit board includes The first surface 11 and the second surface 12 of the. The above-mentioned first surface 11 is provided with at least two low-frequency dipole oscillators 2 , and the second surface 12 is provided with at least two high-frequency dipole oscillators 3 . The above-mentioned at least two low-frequency dipole vibrators 2 are sequentially arranged on the above-mentioned first surface 11 along the first direction M, and at least two high-frequency dipole vibrators 3 are sequentially arranged on the above-mentioned second surface 12 along the first direction M, The foregoing first direction M may specifically be an extending direction of the antenna. That is to say, the two side surfaces of the circuit board of the dual-frequency double-fed omnidirectional high-gain antenna are respectively provided with a low-frequency dipole dipole 2 and a high-frequency dipole dipole 3 .

Fig. 2 is a schematic structural representation of the first surface of the dual-frequency dual-feed omnidirectional high-gain antenna in the embodiment of the present application. As shown in Fig. 1 and Fig. These are the first low-frequency dipole oscillator 21 , the second low-frequency dipole oscillator 22 . . . the nth low-frequency dipole oscillator, where n is a positive integer of at least 2. The adjacent low-frequency dipole oscillators 2 are electrically connected through the first transmission line 4, that is, the first low-frequency dipole oscillator 21 and the second low-frequency dipole oscillator 22 are electrically connected through the first transmission line 4, and the n-1th low-frequency dipole The pole oscillator is electrically connected to the nth low-frequency dipole oscillator through another first transmission line 4 . All low-frequency dipole oscillators 2 are connected in sequence, and adjacent low-frequency dipole oscillators 2 are electrically connected through a first transmission line 4 . Specifically, when the antenna includes n low-frequency dipole dipoles 2 , it includes n−1 first transmission lines 4 . The first low-frequency dipole oscillator 21 is located at the feed-in end, and the first low-frequency dipole oscillator 21 is electrically connected to the first feeder 5. Specifically, the first transmission line 4 and the first feeder 5 pass through the first low-frequency dipole oscillator. 21 are electrically connected to realize signal transmission.

Fig. 3 is a kind of structural representation of the second surface of dual-frequency double-feed omnidirectional high-gain antenna in the embodiment of the present application, as shown in Fig. 1 and Fig. 3, the second surface 12 of above-mentioned circuit board, along the first direction M These are the first high-frequency dipole oscillator 31 , the second high-frequency dipole oscillator 32 . . . the mth high-frequency dipole oscillator, wherein m is a positive integer of at least 2. The adjacent high-frequency dipole oscillators 3 are electrically connected through the second transmission line 6, that is, the first high-frequency dipole oscillator 31 and the second high-frequency dipole oscillator 32 are electrically connected through the second transmission line 6, and the m- The first high-frequency dipole oscillator is electrically connected to the mth high-frequency dipole oscillator through another second transmission line 6 . All high-frequency dipole oscillators 3 are connected in sequence, and adjacent high-frequency dipole oscillators 3 are electrically connected through a second transmission line 6 . Specifically, when the antenna includes m high-frequency dipole dipoles 3 , it includes m−1 second transmission lines 6 . The first high-frequency dipole oscillator 31 is located at the feed-in end. One end of the first high-frequency dipole oscillator 31 is electrically connected to the second transmission line 6, and the other end is electrically connected to the second feeder line 7. Specifically, the above-mentioned second The feeder 7 is electrically connected to the second transmission line 6 through the first high-frequency dipole oscillator 31 to realize signal transmission.

Specifically, the frequency of the signal transmitted by the low-frequency dipole oscillator 2 is lower than the frequency of the signal transmitted by the high-frequency dipole oscillator 3 . For example, the frequency of the signal transmitted by the above-mentioned low-frequency dipole oscillator 2 can be located in the 2.4GHz frequency band, such as between 2.4GHz and 2.5GHz; the frequency of the signal transmitted by the above-mentioned high-frequency dipole oscillator 3 can be located in the 5GHz frequency band, such as in Between 5.1GHz and 5.9GHz. Of course, the specific operating frequency of the dual-frequency dual-feed omnidirectional high-gain antenna can be scaled accordingly according to actual needs.

FIG. 4 is a partial enlarged view of A in FIG. 2 . As shown in FIG. 4 , the above-mentioned first low-frequency dipole vibrator 21 includes a first dipole arm 211 and a second dipole arm 212 arranged along the first direction M . The first dipole arm 211 and the second dipole arm 212 are used for radiating electromagnetic waves. The first transmission line 4 , the first feeder line 5 and the transverse connection between the first dipole arm 211 and the second dipole arm 212 are used to transmit signal energy. A branch 8 is disposed between the first dipole arm 211 and the second dipole arm 212 , and the branch 8 has an isolation portion 81 extending along the second direction N. The second direction N is perpendicular to the first direction M, that is to say, the isolation part 81 isolates the first dipole arm 211 and the second dipole arm 212 along the first direction M to form a high-impedance state, thereby suppressing the second dipole of the circuit board. The high-frequency energy of the two surfaces 12 is coupled to the first surface 11 at the port, reducing the crosstalk of the oscillators on both sides of the circuit board, and improving the isolation between the high-frequency dipole oscillator 3 and the low-frequency dipole oscillator 2 at the port, A high-gain omni-directional design of the antenna is formed to achieve the purpose of improving the performance of the antenna.

FIG. 5 is a schematic diagram of another structure of the second surface of the dual-frequency dual-feed omnidirectional high-gain antenna in the embodiment of the present application. As shown in FIG. 5 , in another technical solution, the second surface 12 of the circuit board 1 of the above-mentioned antenna may also be provided with branches 8 . Specifically, the above-mentioned first high-frequency dipole dipole 31 includes a third dipole arm 35 and a fourth dipole arm 36 arranged along the first direction M. Likewise, the third dipole arm 35 and the fourth dipole arm 36 are used to radiate electromagnetic waves. The second transmission line 6 , the second feeder line 7 and the transverse connection between the third dipole arm 35 and the fourth dipole arm 36 are used to transmit signal energy. A branch 8 may also be provided between the third dipole arm 35 and the fourth dipole arm 36, and the branch 8 has a second isolation portion 81 extending along the second direction N. The second direction N is perpendicular to the first direction M. That is to say, the isolation part 81 isolates the third dipole arm 35 and the fourth dipole arm 36 along the first direction M to form a high-impedance state, so that the low-frequency energy of the first surface 11 of the circuit board 1 can be prevented from being coupled to the port. to the second surface 12, reduce the crosstalk of the oscillators on both sides of the circuit board, improve the isolation between the high-frequency dipole oscillator 3 and the low-frequency dipole oscillator 2 at the port, and form a high-gain omnidirectional design of the antenna, achieving The purpose of improving the performance of the antenna.

Please continue to refer to FIG. 4 , when the above branch 8 is specifically arranged, the above branch 8 may also be a T-shaped branch 8 . That is, the branch 8 also includes a connection portion 82 perpendicular to the isolation portion 81 . The isolation part 81 is connected to the first transmission line 4 , and the connection part 82 is connected to the first feeder line 5 . Alternatively, the above-mentioned first transmission line 4 is connected to the connection part 82 , and the first feeder line 5 is connected to the isolation part 81 . In this solution, by providing the connecting portion 82 , it is convenient to connect the T-shaped branch 8 with the first transmission line 4 and the first feeder line 5 . Specifically, the first transmission line 4 may be welded to the isolation part 81 , and the first feeder line 5 is connected to the connection part 82 .

When specifically setting the first transmission line and the second transmission line, the first transmission line may be a coplanar microstrip transmission line, or the second transmission line may be a coplanar transmission line. The coplanar transmission line is directly printed on the surface of the circuit board, which is beneficial to reduce costs.

Specifically, as shown in FIGS. 2 and 3 , the above-mentioned second transmission line 6 is a coplanar microstrip transmission line 10 , and the first transmission line 4 is a coaxial jumper line 20 . Alternatively, Fig. 6 is another structural schematic diagram of the first surface of the dual-frequency double-feed omnidirectional high-gain antenna in the embodiment of the present application, and Fig. 7 is the second surface of the dual-frequency double-feed omnidirectional high-gain antenna in the embodiment of the present application. Schematic representation of another structure of the surface. As shown in FIGS. 6 and 7 , the above-mentioned first transmission line 4 is a coplanar microstrip transmission line 10 , and the second transmission line 6 is a coaxial jumper line 20 . In this solution, only one of the transmission lines on both sides of the circuit board is a coplanar microstrip transmission line 10 , so as to avoid excessive crosstalk caused by coplanar microstrip transmission lines 10 on both sides.

Specifically, please refer to FIG. 6 and FIG. 7 , in one embodiment, the first transmission line 4 is a coplanar microstrip transmission line 10 , and the second transmission line 6 is a coaxial jumper line 20 . That is to say, the coplanar microstrip transmission line 10 is located on the side where the low-frequency dipole dipole 2 is located. The coplanar microstrip transmission line 10 has a first hollow structure 101 . Specifically, the above-mentioned first hollow structure 101 is in the shape of a slit, that is, the width of the first hollow structure 101 is relatively small. The first hollow structure 101 forms a high-frequency stop band, specifically a stop band of 5.1 GHz˜5.9 GHz. Furthermore, the high-frequency energy generated by the high-frequency dipole oscillator 3 is prevented from being coupled to the first surface 11 , thereby reducing the crosstalk to the signal of the low-frequency dipole oscillator 2 . In addition, disposing the first hollow structure on the coplanar microstrip transmission line is also conducive to the transmission of low-frequency signals. Therefore, this solution improves the isolation between the high-frequency dipole oscillator 3 and the low-frequency dipole oscillator 2, and can also increase the gain of the antenna.

When the above-mentioned first hollow structure 101 is specifically arranged, the first hollow structure 101 can be specifically a U-shaped first hollow structure 101, so that more first hollow structures 101 can be provided along the extension direction of the coplanar microstrip transmission line 10 to improve The coplanar microstrip transmission line 10 on the side where the low-frequency dipole oscillator 2 is located has a decoupling effect on high-frequency signals.

The total length of the first hollow structure 101 is half of the medium wavelength of the high frequency dipole oscillator 3 . Specifically, when the first hollow structure 101 is a linear first hollow structure 101 , the total length of the first hollow structure 101 is the length of the linear first hollow structure 101 . When the above-mentioned first hollow structure 101 is a U-shaped first hollow structure 101, the total length of the above-mentioned first hollow structure 101 is the sum of the lengths of the two long sides and the length of a short side of the U-shaped first hollow structure 101 . This solution can form a high-frequency stop band on the coplanar microstrip transmission line 10, so that the high-frequency pattern of the dual-frequency double-fed omnidirectional antenna is more regular, so as to solve the problem of deformed pattern of different frequencies.

Please refer to FIG. 2 and FIG. 3 , in another embodiment, the first transmission line 4 is a coaxial jumper line 20 , and the second transmission line 6 is a coplanar microstrip transmission line 10 . That is to say, the coplanar microstrip transmission line 10 is located on the side where the high-frequency dipole oscillator 3 is located. The coplanar microstrip transmission line 10 has a second hollow structure 102 . Specifically, the above-mentioned second hollow structure 102 is in the shape of a slit, that is, the width of the second hollow structure 102 is relatively small. The second hollow structure 102 forms a low-frequency stop band, specifically a stop band of 2.4 GHz to 2.5 GHz, thereby preventing the low-frequency energy generated by the low-frequency dipole oscillator 2 from being coupled to the second surface 12, thereby reducing the impact of low-frequency signals on high frequencies. The crosstalk of the signal of frequency dipole dipole 3. In addition, the arrangement of the above-mentioned second hollow structure 102 is also conducive to the transmission of high-frequency signals. Therefore, this solution improves the isolation between the low-frequency dipole oscillator 2 and the high-frequency dipole oscillator 3, and can also increase the gain of the antenna.

When the above-mentioned second hollow structure 102 is specifically arranged, the second hollow structure 102 can specifically be a U-shaped second hollow structure 102, so that more second hollow structures 102 can be provided along the extension direction of the coplanar microstrip transmission line 10 to improve The decoupling effect of the high-frequency dipole oscillator 3 on low-frequency signals.

The total length of the second hollow structure 102 is half of the medium wavelength of the low-frequency dipole oscillator 2 . Specifically, when the second hollow structure 102 is a linear second hollow structure 102 , the total length of the second hollow structure 102 is the length of the linear second hollow structure 102 . When the above-mentioned second hollow structure 102 is a U-shaped second hollow structure 102, the total length of the above-mentioned second hollow structure 102 is the sum of the lengths of the two long sides and the length of a short side of the U-shaped second hollow structure 102 . This solution can form a low-frequency stop band on the coplanar microstrip transmission line 10, so that the low-frequency pattern of the dual-frequency double-fed omnidirectional antenna is more regular, so as to solve the problem of deformity of the different-frequency pattern.

Please refer to FIG. 2 and FIG. 4 , in a specific embodiment, the vibrator arm of the low-frequency dipole dipole 2 has a third hollow structure 23 . Specifically, the above-mentioned third hollow structure 23 is in the shape of a slit, that is, the width of the third hollow structure 23 is relatively small. The third hollow structure 23 forms a high-frequency stop band, thereby preventing the high-frequency energy generated by the high-frequency dipole oscillator 3 from being coupled to the first surface 11, so that the high-frequency energy generated by the high-frequency dipole oscillator 3 remains stable, The low-frequency dipole oscillator 2 has relatively low influence, which is beneficial to improving the stability of the high-frequency pattern and the gain of high-frequency energy. In addition, this solution can also reduce the crosstalk between the energy generated by the high-frequency dipole oscillator 3 and the signal of the low-frequency dipole oscillator 2 , and improve the isolation between the high-frequency dipole oscillator 3 and the low-frequency dipole oscillator 2 .

As shown in Figure 2 and Figure 4, when specifically setting the above-mentioned third hollow structure 23, the third hollow structure 23 can be a U-shaped third hollow structure, so that the vibrator arm of the low-frequency dipole vibrator 2 can be set along the extension direction More third hollow structures 23 are used to improve the decoupling effect of the low-frequency dipole oscillator 2 on high-frequency signals.

The total length of the third hollow structure 23 is half of the medium wavelength of the high frequency dipole oscillator 3 . Specifically, when the third hollow structure 23 is a linear third hollow structure 23 , the total length of the third hollow structure 23 is the length of the linear third hollow structure. When the third hollow structure is a U-shaped third hollow structure, the total length of the third hollow structure 23 is the sum of the lengths of the two long sides and the length of a short side of the U-shaped third hollow structure. This solution can form a high-frequency stop band on the dipole arm of the low-frequency dipole oscillator 2, and each oscillator arm of the low-frequency dipole oscillator 2 has a third hollow structure 23, so that the dual-frequency dual-feed omnidirectional antenna The high-frequency pattern is more regular to solve the problem of deformed inter-frequency patterns.

FIG. 8 is a partially enlarged view of B in FIG. 7 . Please refer to FIG. 8 , the high-frequency dipole dipole 3 includes a third dipole arm 35 and a fourth dipole arm 36 . The third dipole arm 35 has a first sawtooth portion 351 on a side facing the fourth dipole arm 36 , and the fourth dipole arm 36 has a second serration portion 361 on a side facing the third dipole arm 35 . The coupling between the first sawtooth part 351 and the second sawtooth part 361 can make the third dipole arm 35 and the fourth dipole arm 36 have a better coupling degree, and a better degree of freedom and matching, so that the high frequency dipole vibrator The energy conversion efficiency of 3 is better, which is beneficial to increase the gain.

Please refer to FIGS. 1 to 3. In a specific embodiment, the first surface 11 of the circuit board of the dual-frequency double-fed omnidirectional high-gain antenna has two low-frequency dipole vibrators 2, and the second surface 12 has four high-frequency dipoles. Dipole oscillator3. Specifically, the first low-frequency dipole vibrator 21 and the second low-frequency dipole vibrator 22 are arranged sequentially along the first direction M on the first surface 11 of the circuit board, and the first low-frequency dipole vibrator 22 is arranged sequentially along the first direction M on the second surface 12. A high-frequency dipole oscillator 31 , a second high-frequency dipole oscillator 32 , a third high-frequency dipole oscillator 33 , and a fourth high-frequency dipole oscillator 34 . The first low-frequency dipole oscillator 21 and the second low-frequency dipole oscillator 22 are connected through the first transmission line 4 , and the first low-frequency dipole oscillator 21 is connected to the first feeder line 5 . The first high-frequency dipole vibrator 31, the second high-frequency dipole vibrator 32, the third high-frequency dipole vibrator 33, and the fourth high-frequency dipole vibrator 34 are sequentially connected through the second feeder 7, and the above-mentioned first high-frequency dipole vibrator A high-frequency dipole oscillator 31 is connected to the second feeder 7 . The center of the first low frequency dipole oscillator 21 overlaps with the center of the first high frequency dipole oscillator 31 , and the center of the second low frequency dipole oscillator 22 overlaps with the center of the third high frequency dipole oscillator 33 . In this solution, the four high-frequency dipole oscillators 3 can be evenly distributed, or the second high-frequency dipole oscillator 32 and the fourth high-frequency dipole oscillator 34 can be flexibly arranged according to actual needs. Adopting this scheme to lay out the low-frequency dipole dipole 2 and the high-frequency dipole dipole 3 is beneficial to save the space of the antenna.

Please refer to Fig. 2 and Fig. 3, in a kind of specific embodiment, the first surface 11 of the circuit board of dual-frequency double-feed omnidirectional high-gain antenna has two low-frequency dipole dipoles 2, and the second surface 12 has four The high-frequency dipole vibrator 3 adopts the arrangement in the above-mentioned embodiment. A T-shaped branch 8 is arranged between the first dipole arm 211 and the second dipole arm 212 of the first low-frequency dipole dipole 21, and a T-shaped branch 8 is arranged between the third dipole arm 35 and the fourth dipole arm 36 of the high-frequency dipole dipole 3. Adopt sawtooth coupling. Adjacent low-frequency dipole oscillators 2 are connected by coaxial jumper wires 20 , and adjacent high-frequency dipole oscillators 3 are connected by coplanar microstrip transmission lines 10 . The vibrator arm of the low-frequency dipole vibrator 2 has a U-shaped third hollow structure. The total length of the U-shaped third hollow structure is half of the medium wavelength of the high-frequency dipole vibrator 3, forming a stop band for high frequencies. . The coplanar microstrip transmission line 10 has a U-shaped second hollow structure 102 whose total length is half of the medium wavelength of the low-frequency dipole oscillator 2 to form a stop band for low-frequency signals. By reasonably arranging the spacing between the vibrators, specifically, the spacing between the low-frequency dipole oscillators 2 can be 0.8 times the medium wavelength of the low-frequency signal, and the spacing between the high-frequency dipole oscillators 3 can be 0.8 times the wavelength of the high-frequency signal. 0.8 times the wavelength of the medium. Combining the third hollow structure and the second hollow structure 102 to form an isolation measure, so that the dual-frequency double-feed omnidirectional high-gain antenna can achieve high side-fire omnidirectional high gain and high frequency-differential isolation. FIG. 9 is an in-band pattern of the vertical plane of the low-frequency signal when the low-frequency gain of the antenna reaches 4.6dBi in the embodiment of the present application. For details, refer to the pattern when the low-frequency is 2.4GHz and 2.5GHz. It can be seen that in this embodiment, when the gain is higher, the in-band pattern stability of the low frequency signal is also better. Fig. 10 is the in-band pattern of the vertical plane of the high-frequency signal when the high-frequency gain of the antenna reaches 8.26dBi in the embodiment of the present application. For details, refer to the pattern when the high-frequency is 5.2GHz, 5.5GHz and 5.8GHz. It can be seen that in this embodiment, when the gain is high, the stability of the in-band pattern of the high-frequency signal is also good. Figure 11 is a diagram of the relationship between the S parameters and the operating frequency of the antenna in the embodiment of the present application. As shown in Figure 11, S1.1 corresponds to the matching information of the low-frequency dipole oscillator, and the antenna works in a low-frequency (2.4GHz-2.5GHz) state When the S parameter is less than -10, the transmission effect is better. S2.2 corresponds to the matching information of the high-frequency dipole oscillator. When the antenna works at a high frequency (5.1GHz-5.9GHz), the S parameter is less than -18, and the transmission effect is better. S2.1 corresponds to the isolation information between the low-frequency dipole oscillator and the high-frequency dipole oscillator. When the antenna works in the low-frequency (2.4GHz-2.5GHz) state and the high-frequency (5.1GHz-5.9GHz) state, S The parameters are all less than -15, therefore, the isolation of this antenna is better.

Please refer to the embodiment shown in Fig. 6 and Fig. 7, the difference between this embodiment and the implementation shown in Fig. 2 and Fig. 3 is that the low-frequency dipole oscillators 2 are connected by coplanar microstrip transmission lines 10, The high-frequency dipole oscillators 3 are connected by coaxial jumper wires 20 . The coplanar microstrip transmission line 10 has a U-shaped first hollow structure 101 whose total length is half of the medium wavelength of the high-frequency dipole oscillator 3 to form a stop band for high-frequency signals. FIG. 12 is an in-band pattern of the vertical plane of the low-frequency signal when the low-frequency gain of the antenna reaches 4.4dBi in the embodiment of the present application. For details, refer to the pattern when the low-frequency is 2.4GHz and 2.5GHz. It can be seen that in this embodiment, when the gain is higher, the in-band pattern stability of the low frequency signal is also better. Figure 13 is the in-band pattern of the vertical plane of the high-frequency signal when the high-frequency gain of the antenna in the embodiment of the present application reaches 8.43dBi. For details, refer to the pattern when the high-frequency is 5.2GHz, 5.5GHz and 5.8GHz. It can be seen that in this embodiment, when the gain is high, the stability of the in-band pattern of the high-frequency signal is also good. Figure 14 is a relationship diagram between the S parameters and the operating frequency of the antenna in the embodiment of the present application. As shown in Figure 14, S2.2 corresponds to the matching information of the low-frequency dipole oscillator, and the antenna works in a low-frequency (2.4GHz-2.5GHz) state When the S parameter is less than -10, the transmission effect is better. S1.1 corresponds to the matching information of the high-frequency dipole oscillator. When the antenna works at a high frequency (5.1GHz-5.9GHz), the S parameter is less than -10, and the transmission effect is better. S2.1 corresponds to the isolation information between the low-frequency dipole oscillator and the high-frequency dipole oscillator. When the antenna works in the low-frequency (2.4GHz-2.5GHz) state and the high-frequency (5.1GHz-5.9GHz) state, S The parameters are all less than -15, therefore, the isolation of this antenna is better.

Based on the same technical concept, the present application also provides a wireless communication device, which includes a casing, a control circuit and a dual-frequency dual-feed omnidirectional high-gain antenna in any of the above technical solutions. The above-mentioned dual-frequency double-feed omnidirectional high-gain antenna and the control circuit are arranged in the above-mentioned casing, and the above-mentioned dual-frequency double-feed omnidirectional high-gain antenna is electrically connected to the control circuit. The above-mentioned control circuit is used for signal processing, and the dual-frequency double-fed omnidirectional high-gain antenna is used for signal transmission. Specifically, the dual-frequency double-feed omnidirectional high-gain antenna can transmit the signal processed by the control circuit, or the control circuit can receive and process the signal received by the dual-frequency double-feed omnidirectional high-gain antenna. Since the dual-frequency dual-feed omnidirectional high-gain antenna has higher isolation and higher gain, the communication effect of the wireless communication device is better.

In a specific embodiment, a specific type of the foregoing wireless communication device is not limited. For example, the wireless communication device may be a router or a set-top box, etc., and is mainly a WiFi communication device.

Based on the same technical idea, the present application also provides a chip, which includes a control circuit and the dual-frequency dual-feed omnidirectional high-gain antenna in any of the above technical solutions. The above-mentioned dual-frequency double-feed omnidirectional high-gain antenna is electrically connected to the control circuit. Specifically, the above-mentioned control circuit and the dual-frequency dual-feed omnidirectional high-gain antenna can form a package structure, so as to simplify the chip installation process. The above-mentioned control circuit is used for signal processing, and the dual-frequency double-fed omnidirectional high-gain antenna is used for transmitting the input and output signals of the above-mentioned control circuit. Specifically, the dual-frequency double-feed omnidirectional high-gain antenna can transmit the signal processed by the control circuit, or the control circuit can receive and process the signal received by the dual-frequency double-feed omnidirectional high-gain antenna. Due to the high isolation and high gain of the dual-frequency double-feed omnidirectional high-gain antenna, the communication effect of the chip is better.

Apparently, those skilled in the art can make various changes and modifications to this application without departing from the protection scope of this application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A dual-frequency dual-feed omnidirectional high-gain antenna is characterized in that it includes:

a circuit board comprising first and second surfaces facing away from each other;

At least two low-frequency dipole oscillators 2 are sequentially arranged on the first surface along the first direction; adjacent low-frequency dipole oscillators are electrically connected through a first transmission line 4; the at least two low-frequency dipoles The sub oscillator 2 includes a first low-frequency dipole oscillator 21, which is electrically connected to the first feeder 5; the first low-frequency dipole oscillator 21 includes first The dipole arm 211 and the second dipole arm 212;

At least two high-frequency dipole oscillators 3 are sequentially arranged on the second surface along the first direction; the adjacent high-frequency dipole oscillators are electrically connected through a second transmission line 6; the at least two A high-frequency dipole oscillator includes a first high-frequency dipole oscillator 31, and the first high-frequency dipole oscillator 31 is electrically connected to the second feeder 7; the frequency of the signal transmitted by the high-frequency dipole oscillator , higher than the frequency of the signal transmitted by the low-frequency dipole oscillator;

The branch 8 is disposed between the first dipole arm 211 and the second dipole arm 212; the branch has an isolation portion 81 extending along a second direction, the second direction is perpendicular to the first direction, The branch 8 is connected between the first transmission line 4 and the first feeder 5 .
The dual-frequency dual-feed omnidirectional high-gain antenna according to claim 1, wherein the first transmission line is a coplanar microstrip transmission line, and the coplanar microstrip transmission line has a first hollow structure 101 .
The dual-frequency dual-feed omnidirectional high-gain antenna according to claim 2, wherein the first hollow structure is U-shaped.
The dual-frequency dual-feed omnidirectional high-gain antenna according to claim 2 or 3, wherein the total length of the first hollow structure is half of the medium wavelength of the high-frequency dipole oscillator.
The dual-frequency dual-feed omnidirectional high-gain antenna according to claim 1, wherein the second transmission line is a coplanar microstrip transmission line, and the coplanar microstrip transmission line has a second hollow structure 102 .
The dual-frequency double-feed omnidirectional high-gain antenna according to claim 5, wherein the second hollow structure is U-shaped.
The dual-frequency dual-feed omnidirectional high-gain antenna according to claim 5 or 6, wherein the total length of the second hollow structure is half of the medium wavelength of the low-frequency dipole oscillator.
The dual-frequency dual-feed omnidirectional high-gain antenna according to any one of claims 1 to 7 is characterized in that the dipole arm of the low-frequency dipole dipole has a third hollow structure 23 .
The dual-frequency dual-feed omnidirectional high-gain antenna according to claim 8, wherein the third hollow structure is U-shaped.
The dual-frequency dual-feed omnidirectional high-gain antenna according to claim 8 or 9, wherein the total length of the third hollow structure 23 is half of the medium wavelength of the high-frequency dipole oscillator.
The dual-frequency dual-feed omnidirectional high-gain antenna according to any one of claims 1 to 10, wherein the first transmission line is a coplanar microstrip transmission line; or, the second transmission line is a coplanar microstrip Transmission line.
The dual-frequency dual-feed omnidirectional high-gain antenna according to any one of claims 1 to 11, characterized in that the branch is T-shaped.
The dual-frequency dual-feed omnidirectional high-gain antenna according to any one of claims 1 to 12, wherein the high-frequency dipole dipole includes a third dipole arm and a fourth dipole arm, and the third The side of the vibrator arm facing the fourth dipole arm has a first sawtooth portion 351, the side of the fourth dipole arm facing the third dipole arm has a second sawtooth portion 361, and the first sawtooth portion Coupled with the second serration.
The dual-frequency double-feed omnidirectional high-gain antenna according to any one of claims 1 to 13, wherein the first low-frequency dipole vibrator and the second low-frequency dipole are sequentially arranged on the first surface vibrator, the second surface is sequentially arranged with the first high-frequency dipole vibrator, the second high-frequency dipole vibrator, the third high-frequency dipole vibrator and the fourth high-frequency dipole vibrator, the The center of the first low-frequency dipole oscillator overlaps with the center of the first high-frequency dipole oscillator, and the center of the second low-frequency dipole oscillator overlaps with the center of the third high-frequency dipole oscillator.
A wireless communication device, characterized in that it includes a casing, a control circuit and a dual-frequency double-feed omnidirectional high-gain antenna according to any one of claims 1 to 14, the control circuit and the dual-frequency double-feed omnidirectional The directional high-gain antenna is arranged on the housing, and the control circuit is electrically connected to the dual-frequency double-fed omnidirectional high-gain antenna.
A chip, characterized in that it comprises a control circuit and the dual-frequency dual-feed omnidirectional high-gain antenna according to any one of claims 1 to 14, the control circuit and the dual-frequency dual-feed omnidirectional high-gain antenna electrical connection.