Cavity, phase shifter, phase shifter assembly and antenna

Abstract

The invention discloses a cavity for a phase shifter, and belongs to the technical field of phase shifters. The cavity comprises a top wall, a bottom wall arranged opposite to the top wall and a pair of side walls connected between the top wall and the bottom wall, the top wall, the bottom wall and the side walls define an accommodating cavity for accommodating the phase shifting assembly, and the width of the accommodating cavity close to the top wall and / or the bottom wall is smaller than that of the middle part; the containing cavity close to the top wall and / or the containing cavity close to the bottom wall are / is in a trapezoid shape. The invention further discloses a phase shifter with the cavity, a phase shifter assembly with the phase shifter and an antenna with the phase shifter or the phase shifter assembly. The resonant frequency of the cavity can be far away from the working frequency band, and the performance of the phase shifter is prevented from being affected by the resonant frequency of the cavity.

Description

[0001] Description of the case

[0002] This application is a divisional application of the Chinese invention patent application with the application date of April 21, 2023, application number 202310436696.1, and invention name "A cavity, a phase shifter, a phase shifter assembly and an antenna". Technical Field

[0003] The present invention relates to the technical field of phase shifters, and in particular to a cavity for a phase shifter, a phase shifter having the cavity, a phase shifter component having the phase shifter, and an antenna having the phase shifter or the phase shifter component. Background Art

[0004] In the field of mobile communications, antennas are used as transmitting and receiving components of radios, and are important components that affect the signal quality of devices. Antennas usually include radiating oscillators and feeding networks, and the feeding network includes phase shifters and power dividers. One end of the power divider is connected to the phase shifter through a cable, and the other end is connected to the radiating oscillator through a cable. At present, the phase shifting circuit of the phase shifter is a PCB circuit board with a microstrip structure. This arrangement makes the loss of the phase shifter relatively large. Secondly, the phase shifter and the power divider are connected by a cable. This arrangement further increases the loss of the antenna. In order to reduce the loss of the antenna and increase the gain, the researchers made the microstrip phase shifter into a cavity phase shifter with a stripline structure. The cavity phase shifter usually includes a cavity and a phase shifting circuit arranged in the cavity. In order to further reduce the loss, the researchers further made the cable connecting the phase shifter and the power divider into a stripline and arranged it in the receiving cavity of the cavity. Such a setting will increase the height of the cavity, so that the resonant frequency of the phase shifter is reduced and is very close to the operating frequency band of the phase shifter, or even makes the resonant frequency of the cavity fall within the operating frequency band of the phase shifter. When the resonant frequency of the cavity is close to the operating frequency band of the phase shifter or within the operating frequency band of the phase shifter, it will affect the performance of the phase shifter, and thus have an adverse effect on the feeding network and the antenna.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] An object of the present invention is to provide a cavity for a phase shifter, which can make the resonance frequency of the cavity away from the working frequency band, thereby preventing the performance of the phase shifter from being affected by the resonance frequency of the cavity.

[0007] Another object of the present invention is to provide a phase shifter having the above-mentioned cavity, which can make the resonance frequency of the cavity away from the working frequency band, thereby preventing the performance of the phase shifter from being affected by the resonance frequency of the cavity.

[0008] Another object of the present invention is to provide a phase shifter assembly having the above-mentioned phase shifter, which can make the resonance frequency of the cavity away from the working frequency band and avoid the performance of the phase shifter being affected by the resonance frequency of the cavity.

[0009] Another object of the present invention is to provide an antenna having the above-mentioned phase shifter assembly or phase shifter, which can make the resonant frequency of the cavity away from the working frequency band and avoid the performance of the phase shifter being affected by the resonant frequency of the cavity.

[0010] To achieve the above-mentioned purpose, an embodiment of the present invention provides a cavity for a phase shifter, which is used to assemble a phase shift component, wherein the phase shift component includes a phase shift circuit and a phase shift medium that can move relative to the phase shift circuit, and the cavity includes a top wall, a bottom wall arranged opposite to the top wall, and a pair of side walls connected between the top wall and the bottom wall, and the top wall, the bottom wall and the side walls form a receiving cavity for accommodating the phase shift component, and the width of the receiving cavity close to the top wall and / or the side wall is smaller than the width of the middle part.

[0011] In one or more embodiments of the present invention, at least one step structure is provided on the side wall of the cavity near the top wall and / or the bottom wall.

[0012] In one or more embodiments of the present invention, the receiving cavity close to the top wall and / or the receiving cavity close to the bottom wall is in a trapezoidal shape.

[0013] In one or more embodiments of the present invention, the distance between a pair of side walls located on one side of the step structure and close to the end of the cavity is W1, and the distance between a pair of side walls located on the other side of the step structure is W, wherein,

[0014] W1<W.

[0015] In one or more embodiments of the present invention, the ratio of W1 to W is not less than one third.

[0016] In one or more embodiments of the present invention, the number of the step structures is 2 and they are located at the intersection of the side wall and the top wall.

[0017] In one or more embodiments of the present invention, the cavity further includes an extension wall extending outward from one side of the top wall, and the extension wall and the top wall are coupled to a reflective plate.

[0018] An embodiment of the present invention further provides a phase shifter, comprising:

[0019] The cavity described above;

[0020] The phase shift component is assembled in the receiving cavity and comprises a phase shift circuit and a phase shift medium which can move relative to the phase shift circuit.

[0021] In one or more embodiments of the present invention, the phase-shifting medium is disposed close to the top wall or the bottom wall of the cavity.

[0022] In one or more embodiments of the present invention, the distance between the top wall and the bottom wall is L, and the minimum distance between the phase-shifting medium and the top wall of the cavity is no more than 0.25L.

[0023] In one or more embodiments of the present invention, the distance between the top wall and the bottom wall is L, and the minimum distance between the phase-shifting medium and the bottom wall of the cavity is no more than 0.25L.

[0024] In one or more embodiments of the present invention, the ratio of the effective volume V1 of the phase-shifting medium to the volume V of the receiving chamber is not greater than 1 / 3.

[0025] In one or more embodiments of the present invention, the ratio of the effective volume V1 of the phase-shifting medium to the volume V of the receiving chamber is not greater than 1 / 5.

[0026] An embodiment of the present invention also provides a phase shifter assembly, comprising a first phase shifter and a second phase shifter, wherein at least one of the first phase shifter and the second phase shifter is the phase shifter described above, wherein the cavity side walls of the first phase shifter are arranged opposite to the cavity side walls of the second phase shifter, and the cavity top wall of the first phase shifter is provided with a first extension wall, and the cavity top wall of the second phase shifter extends in a direction away from the first phase shifter to form a second extension wall coupled with a reflective plate, and a groove is provided between the first extension wall and the second extension wall so that the plane of the first extension wall facing the reflective plate is disconnected from the plane of the second extension wall facing the reflective plate.

[0027] In one or more embodiments of the present invention, the first extension wall is formed by extending from the cavity top wall of the first phase shifter in a direction away from the second phase shifter; the second extension wall is formed by extending from the cavity top wall of the second phase shifter in a direction away from the first phase shifter; the first extension wall, the cavity top wall of the first phase shifter, the second extension wall and the cavity top wall of the second phase shifter are coplanar.

[0028] In one or more embodiments of the present invention, the cavity top wall of the first phase shifter is at least partially concave, the cavity top wall of the second phase shifter is at least partially concave, and the concave portion of the first phase shifter and the concave portion of the second phase shifter form the groove.

[0029] In one or more embodiments of the present invention, the cavity of the first phase shifter and the cavity of the second phase shifter share a side wall.

[0030] In one or more embodiments of the present invention, the phase shifter assembly further includes a connecting member; the connecting member connects a side wall of the first phase shifter and a side wall of the second phase shifter, or connects a bottom wall of the first phase shifter and a bottom wall of the second phase shifter.

[0031] An embodiment of the present invention also provides an antenna, comprising a reflecting plate, a radiating unit and the above-mentioned phase shifter or the above-mentioned phase shifter assembly, wherein the radiating unit is arranged on one side of the reflecting plate, and the phase shifter or the phase shifter assembly is arranged on the opposite side, and the phase shifter or the phase shifter assembly is electrically connected to the radiating unit.

[0032] In one or more embodiments of the present invention, the antenna also includes a feeding conductor, the reflecting plate is provided with a mounting groove that penetrates the reflecting plate, the cavity of the phase shifter or the phase shifter assembly is provided with a mounting hole corresponding to the mounting groove, one end of the feeding conductor is connected to the radiation unit, and the opposite end passes through the mounting groove and the mounting hole and is electrically connected to the phase shifting circuit.

[0033] In one or more embodiments of the present invention, the radiation unit includes a vibrator and a vibrator support member, and the vibrator is disposed on the phase shifter or the phase shifter assembly through the vibrator support member.

[0034] Compared with the prior art, the present invention can effectively improve the resonant frequencies of the fundamental mode and higher-order modes of the cavity by changing the structure of the receiving cavity so that the width close to the top wall and / or the bottom wall is smaller than the width of the middle part, and / or changing the position and size of the phase shifting medium, so that the resonant frequency of the cavity is ultimately away from the working frequency band of the phase shifter, thereby avoiding adverse effects on the feeding network and the operation of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of a cavity structure according to an embodiment of the present invention;

[0036] Figure 2 is a second schematic diagram of a cavity structure according to an embodiment of the present invention;

[0037] Figure 3 is a schematic diagram of various cavity shapes according to an embodiment of the present invention;

[0038] Figure 4 is a schematic diagram of a phase shifter with phase shifting media at different positions according to an embodiment of the present invention;

[0039] Figure 5 is a field intensity distribution diagram inside the receiving cavity when there is no medium according to an embodiment of the present invention;

[0040] Figure 6 is a field intensity distribution diagram inside the receiving cavity when the medium is at the end of the receiving cavity according to an embodiment of the present invention;

[0041] Figure 7 is a field intensity distribution diagram inside the receiving cavity when the medium is in the middle of the receiving cavity according to an embodiment of the present invention;

[0042] Figure 8 is a perspective view of a phase shifter assembly according to an embodiment of the present invention;

[0043] Fig. 9 yes Figure 8 A schematic diagram of the cross-sectional structure of the phase shifter assembly;

[0044] Fig.10 is a schematic diagram of a groove structure in a phase shifter assembly according to an embodiment of the present invention;

[0045] Fig.11 Schematic diagram of the connection of the cavity side walls of two phase shifters according to one embodiment of the present invention Figure 1 ;

[0046] Fig.12 Schematic diagram of the connection of the cavity side walls of two phase shifters according to one embodiment of the present invention Figure 2 ;

[0047] Fig.13 is a schematic diagram of an antenna structure according to an embodiment of the present invention.

[0048] Description of main reference numerals:

[0049] 10-cavity, 10a-top wall, 10b-bottom wall, 10c-side wall, 10d-accommodating cavity, 10e-extension wall, 20-phase shifting component, 20a-phase shifting circuit, 20b-phase shifting medium, 30-phase shifter, 40-reflecting plate, 50-radiating unit, M-groove, N-connector. DETAILED DESCRIPTION

[0050] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0051] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0052] In the prior art, when the resonant frequency of the phase shifter cavity is close to the working frequency band of the phase shifter 30 or within the working frequency band of the phase shifter 30, it will affect the performance of the phase shifter 30. In order to solve this problem, the phase shifter cavity disclosed in an embodiment of the present invention can make the resonant frequency of the cavity 10 far away from the working frequency band, so as to prevent the performance of the phase shifter 30 from being affected by the resonant frequency of the receiving cavity 10d.

[0053] Figure 1 A cavity for a phase shifter according to a preferred embodiment of the present invention is shown, which can be equipped with a phase shifting component 20 for adjusting the phase. The cavity 10 includes a top wall 10a, a bottom wall 10b and a pair of side walls 10c, wherein the pair of side walls 10c are two side walls 10c arranged opposite to each other and having a certain distance therebetween. The top wall 10a and the bottom wall 10b are arranged opposite to each other, with a certain distance therebetween. The two side walls 10c are connected between the top wall 10a and the bottom wall 10b, and the two side walls 10c, the top wall 10a and the bottom wall 10b finally form a receiving cavity 10d, in which the phase shifting component 20 can be assembled.

[0054] Furthermore, in order to improve the resonant frequency of the cavity 10 and make it away from the working frequency band of the phase shifter 30, the present invention improves the resonant frequency of the cavity 10 by changing the structure of the receiving cavity 10d on the cavity 10, so that the resonant frequency of the cavity 10 is finally away from the working frequency band of the phase shifter 30. Specifically, the width of the receiving cavity 10d near the top wall 10a is set to be smaller than the width of the middle part, such as Figure 1 and 2 As shown, part A is the part of the receiving cavity 10d close to the top wall 10a, and part B is the middle part of the receiving cavity 10d. The width of the receiving cavity of part A is smaller than the width of the receiving cavity of part B. Of course, the width of the receiving cavity 10d close to the bottom wall 10b can also be set to be smaller than the width of the middle part. Alternatively, the width of the receiving cavity 10d close to the top wall 10a and the width of the receiving cavity 10d close to the bottom wall 10b can both be set to be smaller than the width of the middle part, which can be selected according to actual needs.

[0055] Furthermore, in order to realize that the width of the receiving cavity 10d near the top wall 10a or near the bottom wall 10b is smaller than the width of the middle part, on the one hand, the side wall 10c of the cavity 10 can be set as a step structure, such as Figure 1 As shown; another In another aspect, at least the portion of the receiving cavity 10d close to the top wall 10a and / or the bottom wall 10b may be set to be a trapezoidal shape, such as Figure 2 Shown Of course, the solution of making the width of the receiving cavity 10d close to the top wall 10a or close to the bottom wall 10b smaller than the width of the middle part is not limited to the above, and it is only necessary to make the final structure of the receiving cavity 10d satisfy that the width close to the top wall 10a and / or close to the bottom wall 10b is smaller than the width of the middle part.

[0056] Figure 1The side wall 10c of the cavity 10 is shown to be provided with a step structure C. Specifically, the side wall 10c of the cavity 10 is provided with a step structure near the top wall 10a, and the step structure makes the width of the receiving cavity 10d near the top wall 10a smaller than the width of the middle part. The number and position of the step structure can be set according to actual needs. In specific implementation, two step structures ( Figure 1 A step structure is provided on each side wall 10c, and it is best if the step structure is located at the intersection of the side wall 10c and the top wall 10a.

[0057] Furthermore, if Figure 1 As shown, the receiving cavity 10d is preferably a rectangular cavity. Figure 1 The width of the receiving cavity 10d on the side close to the top wall 10a is the distance W1 between the pair of side walls 10c, and the width of the receiving cavity 10d on the opposite side of the step structure is the distance W between the pair of side walls 10c, and W1 and W satisfy the following relationship: W1 is less than W. In implementation, it is best to satisfy the following relationship between W1 and W: the ratio of W1 to W is not less than one third. By making the width of the receiving cavity 10d satisfy the above relationship, the resonant frequency of the receiving cavity 10d can be effectively improved, and it can be kept away from the working frequency band of the phase shifter 30. Figure 3 As shown in (a), taking the size of the receiving cavity 10d as 500*50*9mm as an example, there is no medium filling inside, and this receiving cavity 10d has no step structure. At this time, the resonant frequencies of the fundamental mode and the higher-order mode of the receiving cavity 10d are shown in Table 1 below. Figure 3 As shown in (b) and (c), when the receiving cavity 10d is provided with a step structure, the resonant frequencies of the fundamental mode and the higher-order mode of the receiving cavity 10d are shown in Tables 2 and 3 below, wherein the distance between a pair of side walls near the top in (b) is greater than the distance between a pair of side walls near the top in (c).

[0058] Mode1 (base mode) Mode2 (higher mode) Mode3 (higher mode) 1 3.0148GHz 3.0606GHz 3.1365GHz 2 3.1838GHz 3.2272GHz 3.2965GHz 3 3.2468GHz 3.2899GHz 3.3595GHz

[0059] By comparison, it can be seen that by setting the step structure, the width of the receiving cavity 10d close to the top wall 10a is smaller than the width of the middle part, so that the resonant frequency of the cavity is shifted to high frequency, and finally away from the working frequency band of the phase shifter 30, where the working frequency band of the phase shifter 30 is usually 1.7 to 2.7 GHz. At the same time, by comparison, it can be seen that by changing the width size of the receiving cavity 10d at the step structure, the resonant frequency of the receiving cavity 10d can be increased, making it further away from the working frequency band of the phase shifter 30.

[0060] Figure 2Specifically, the width of the trapezoidal receiving cavity 10d near the top wall 10a is smaller than the width of the middle part, which can make the resonance frequency of the fundamental mode and high-order mode of the receiving cavity 10d away from the working frequency band of the phase shifter 30, avoiding adverse effects on the feeding network and the antenna.

[0061] Combination Figure 1 and Figure 2 As shown, the cavity 10 further includes an extension wall 10e, which is formed by extending the top wall 10a of the cavity 10 outward, and the extension wall 10e and the top wall 10a of the cavity 10 can be used for coupling connection with the reflection plate.

[0062] The present invention changes the structure of the receiving cavity 10d so that the width close to the top wall 10a and / or the bottom wall 10b is smaller than the width of the middle part, which can effectively improve the resonant frequencies of the fundamental mode and the higher-order modes of the cavity 10, so that the resonant frequency of the cavity 10 is ultimately far away from the operating frequency band of the phase shifter 30, thereby avoiding adverse effects on the feeding network and the operation of the antenna.

[0063] Combination Figure 4 As shown in (a), (b), and (c) of FIG. 1 , a phase shifter 30 in a preferred embodiment of the present invention comprises the cavity 10 and the phase shifting assembly 20 described above. The phase shifting component 20 is installed in the receiving cavity 10d to achieve phase adjustment. The phase shift circuit 20a includes a phase shift circuit 20a and a phase shift medium 20b, and the phase shift medium 20b can shift relative to the phase shift circuit 20a along a preset direction. Move to achieve phase adjustment, and finally adjust the antenna downtilt angle The phase shift circuit 20a herein includes but is not limited to a PCB board. In other embodiments, the phase shift circuit 20a may also be a plate-shaped member designed with tinned aluminum or copper. Take PCB board as an example, How the phase shifting component 20 realizes phase adjustment is described in detail: a signal line for signal transmission is provided on the PCB, and a phase shifting medium 20b is covered Cover part of the signal line . When the phase shift medium 20b moves relative to the phase shift circuit 20a, the propagation speed of the signal on the signal line will change. changes, thus changing the phase of the signal .

[0064] Combination Figures 4 to 7 As shown, in order to improve the resonant frequency of the cavity 10 and keep it away from the working frequency band of the phase shifter 30, in addition to changing the structure of the receiving cavity 10d as described above, the resonant frequency of the cavity 10 can also be improved by changing the position and / or size of the phase shifting medium 20b, so that the resonant frequency of the cavity 10 is finally away from the working frequency band of the phase shifter 30.

[0065] Specifically, Figure 4 As shown, the phase shifting medium 20b is arranged close to the end of the cavity 10, which can effectively improve the resonant frequency of the cavity 10 and keep it away from the working frequency band of the phase shifter 30. Figures 4 to 7 As shown, Figure 4 (a) The phase shifting medium 20b is disposed close to the bottom wall 10b. At this time, the resonance frequencies of the fundamental mode and the higher-order mode of the cavity 10 are shown in Table 1 below; Figure 4(b) The phase shift medium 20b is arranged away from the bottom wall 10b, and the phase shift medium 20b is located below the center of the receiving cavity 10d, or the phase shift medium 20b is arranged away from the bottom wall 10b and close to the center of the receiving cavity 10d. At this time, the resonant frequencies of the fundamental mode and the higher-order mode of the cavity 10 are shown in Table 2 below; Figure 4 In (c), the phase shifting medium 20b is located at the center of the receiving cavity 10d. At this time, the resonant frequencies of the fundamental mode and the higher-order mode of the cavity 10 are shown in Table 3 below.

[0066] Mode1 (base mode) Mode2 (higher mode) Mode3 (higher mode) 1 2.9312GHz 3.0351GHz 3.1020GHz 2 2.6375GHz 2.8430GHz 3.0563GHz 3 2.4964GHz 2.7144GHz 2.9986GHz

[0067] By comparison, it can be seen that as the phase shift medium 20b approaches the central area of ​​the receiving cavity 10d along the height direction (i.e., the distance between the top wall 10a and the bottom wall 10b is the height direction), the resonance frequencies of the fundamental mode and the higher-order mode of the cavity 10 show a downward trend. For example, when the phase shift medium moves from near the bottom wall to the central area, the fundamental mode frequency of the cavity drifts toward the low frequency. From near the bottom wall to the central area, there is a drift of about 500MHz. By arranging the phase shift medium 20b close to the end of the cavity 10, the resonance frequency of the cavity 10 can be effectively improved, that is, the resonance frequencies of the fundamental mode and the higher-order mode of the cavity 10 are increased, so that they are away from the working frequency band of the phase shifter 30. See Figure 6 and Figure 7 The reason why the resonance frequencies of the fundamental mode and the higher-order mode of the cavity 10 decrease as the phase-shifting medium 20b approaches the central region is that: for the receiving cavity 10d, the electric field distribution inside it is as follows: Figure 5 As shown, the field strength near the center is much higher than the field strength near the bottom wall 10b or the top wall 10a. When the phase shifting medium 20b is located at the center of the receiving cavity 10d, the equivalent capacitance increases and the resonant frequency drifts to a low frequency, such as Figure 7 shown.

[0068] Furthermore, if Figure 4 As shown, in order to ensure that the position of the phase shifting medium 20b in the receiving cavity 10d can make the resonant frequency of the cavity 10 away from the working frequency band of the phase shifter 30. The minimum distance between the phase shifting medium 20b and the top wall 10a or the bottom wall 10b satisfies the following relationship: L0≤0.25L, where L is the distance between the top wall 10a and the bottom wall 10b.

[0069] Furthermore, in order to ensure that the position of the phase-shifting medium 20b in the receiving cavity 10d can make the resonant frequency of the cavity 10 away from the working frequency band of the phase shifter 30. The effective volume V1 of the phase-shifting medium 20b is not greater than 1 / 3 of the volume V of the receiving cavity 10d. Furthermore, the ratio of the effective volume V1 of the phase-shifting medium 20b to the volume V of the receiving cavity 10d is not greater than 1 / 5. With such an arrangement, when the volume of the phase-shifting medium 20b is further reduced, the position of the phase-shifting medium 20b in the receiving cavity 10d can be flexible and changeable. The effective volume of the phase-shifting medium 20b refers to the sum of the volumes of all media that cooperate with the phase-shifting circuit to affect the propagation speed of the signal in the phase-shifting circuit. For example, the phase-shifting medium generally includes a plurality of phase-shifting dielectric elements and a connecting element that connects adjacent dielectric elements; wherein the phase-shifting dielectric element cooperates with the phase-shifting circuit to affect the propagation speed of the signal in the phase-shifting circuit; at this time, the effective volume of the phase-shifting medium is the sum of the volumes of all phase-shifting dielectric elements. In this embodiment, Figure 4 As shown, the phase shift medium 20b includes two sub-phase shift media, and the phase shift circuit is located between the two sub-phase shift media. When multiple sub-phase shift media are arranged in the receiving cavity 10d, the ratio of the total volume of the sub-phase shift media to the volume V of the receiving cavity 10d is not greater than 1 / 3.

[0070] Combination Figure 8 and Fig. 9 As shown, a phase shifter assembly of a preferred embodiment of the present invention includes a first phase shifter and a second phase shifter, as shown in FIG. Fig. 9 As shown, the left phase shifter 30 is the first phase shifter, and the right phase shifter 30 is the second phase shifter. At least one of the first phase shifter and the second phase shifter is the above-mentioned phase shifter 30. In implementation, it is best to have both the first phase shifter and the second phase shifter be the above-mentioned phase shifter 30.

[0071] Specifically, the first phase shifter and the second phase shifter are arranged opposite to each other. In this embodiment, the first phase shifter and the second phase shifter are arranged opposite to each other by arranging the cavity side wall 10c of the first phase shifter and the cavity side wall 10c of the second phase shifter opposite to each other. Fig. 9 As shown, the cavity side wall 10c of the first phase shifter faces the cavity side wall 10c of the second phase shifter.

[0072] Furthermore, the top wall 10a of the cavity of the first phase shifter is provided with a first extension wall, such as Fig. 9 As shown, the extension wall 10e of the left phase shifter 30 is a first extension wall. The top wall 10a of the cavity of the second phase shifter is provided with a second extension wall, such as Fig. 9As shown, the extension wall 10e of the right phase shifter 30 is the second extension wall 10e. A groove M is formed between the first extension wall and the second extension wall so that the plane of the first extension wall facing the reflector is disconnected from the plane of the second extension wall 10e facing the reflector. By using a groove structure to disconnect the plane of the first extension wall facing the reflector from the plane of the second extension wall facing the reflector, on the one hand, the process difficulty can be reduced and costs can be saved, and on the other hand, the coupling between different frequency bands can be weakened and the quality of the directional pattern can be improved. The process difficulty is reduced here because the plane of the first extension wall facing the reflector can be disconnected from the plane of the second extension wall facing the reflector by setting the groove M to form two relatively small planes. Compared with the entire large plane before disconnection, the smaller plane is easier to process and thus the process difficulty can be reduced and costs can be saved.

[0073] In this embodiment, the first extension wall is formed by extending the cavity top wall 10a of the first phase shifter toward the second phase shifter, and the second extension wall is formed by extending the cavity top wall 10a of the second phase shifter toward the first phase shifter. The first extension wall, the cavity top wall 10a of the first phase shifter, the second extension wall and the cavity top wall 10a of the second phase shifter are coplanarly arranged to achieve coupling connection between two phase shifters and a reflector.

[0074] Furthermore, if Fig. 9 As shown, the cavity of the first phase shifter is connected to the cavity of the second phase shifter through a common side wall, and the cavity top wall 10a of the first phase shifter is at least partially recessed, and the cavity top wall 10a of the second phase shifter is at least partially recessed, and the recessed portion of the first phase shifter and the recessed portion of the second phase shifter form the groove M. The width of the recessed portion of the cavity top wall 10a is not greater than the width of the cavity top wall 10a, and at the same time, the depth of the recessed portion of the cavity top wall 10a is not greater than the wall thickness of the extension wall 10e, so as to ensure the structural strength of the cavity 10. Of course, in other embodiments, such as Fig.10 As shown, the depth of the groove M can also be greater than the thickness of the extension wall 10e, and the depth of the groove M can be set according to actual needs. The present invention can reduce the space occupied by the phase shifter assembly by adopting a common side wall arrangement. Of course, in other embodiments, the common side wall arrangement may also be used, such as Figure 11-12 As shown, the two side walls 10c are connected by a connector N to achieve a common ground function. The location of the connector N can be set according to actual needs, such as Fig.10 As shown, the connecting member N is arranged at the bottom, connecting the cavity bottom walls 10b of the two phase shifters. Fig.11 As shown, the connecting member N is disposed near the middle portion to connect the cavity side walls 10c of the two phase shifters.

[0075] like Fig.13As shown, an antenna of a preferred embodiment of the present invention comprises a reflector 40, a radiation unit 50 and the above-mentioned phase shifter 30 or phase shifter assembly. The radiation unit 50 is arranged on one side of the reflector 40, and the phase shifter 30 or phase shifter assembly is arranged on the opposite side, and the phase shifter 30 or phase shifter assembly is electrically connected to the radiation unit 50.

[0076] Furthermore, the antenna further includes a feeding conductor (not shown), and the phase shifter 30 or the phase shifter assembly is electrically connected to the radiation unit 50 via the feeding conductor. Fig.12 As shown, the reflector is provided with a mounting groove 40a that penetrates the reflector 40, and the radiation unit 50 can be mounted at the mounting groove 40a. The cavity 10 of the phase shifter 30 is provided with a mounting hole (not shown) corresponding to the mounting groove 40a. One end of the feed conductor is electrically connected to the radiation unit 50, and the opposite end passes through the mounting groove 40a and the mounting hole and enters the cavity 10 and is electrically connected to the phase shift circuit 20a, thereby realizing the electrical connection between the phase shifter 30 or the phase shifter assembly and the radiation unit.

[0077] In this embodiment, the radiation unit 50 includes a vibrator and a vibrator support member, and the vibrator is assembled on the phase shifter or the phase shifter assembly through the vibrator support member.

[0078] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A cavity for a phase shifter, used for assembling a phase shift component, wherein the phase shift component comprises a phase shift circuit and a phase shift medium movable relative to the phase shift circuit, characterized in that: The cavity includes a top wall, a bottom wall arranged opposite to the top wall, and a pair of side walls connected between the top wall and the bottom wall. The top wall, the bottom wall and the side walls form a receiving cavity for receiving the phase shifting component. The width of the receiving cavity near the top wall and / or the bottom wall is smaller than the width of the middle part. The receiving cavity near the top wall and / or the receiving cavity near the bottom wall is trapezoidal in shape.

2. The cavity for phase shifter according to claim 1, characterized in that: The cavity further includes an extension wall extending outward from one side of the top wall, and the extension wall and the top wall are coupled to the reflection plate.

3. A phase shifter, characterized in that: include The cavity according to any one of claims 1 to 2; The phase shift component is assembled in the receiving cavity and comprises a phase shift circuit and a phase shift medium which can move relative to the phase shift circuit.

4. The phase shifter according to claim 3, characterized in that The phase shifting medium is arranged close to the top wall or the bottom wall of the cavity.

5. The phase shifter according to claim 4, characterized in that The distance between the top wall and the bottom wall is L, and the minimum distance between the phase-shifting medium and the top wall of the cavity is no greater than 0.25L.

6. The phase shifter according to claim 4, characterized in that The distance between the top wall and the bottom wall is L, and the minimum distance between the phase-shifting medium and the bottom wall of the cavity is no greater than 0.25L.

7. The phase shifter according to claim 4, characterized in that The ratio of the effective volume V1 of the phase-shifting medium to the volume V of the receiving chamber is not greater than 1 / 3.

8. The phase shifter according to claim 7, characterized in that The ratio of the effective volume V1 of the phase-shifting medium to the volume V of the receiving chamber is not greater than 1 / 5.

9. A phase shifter assembly, characterized in that: It comprises a first phase shifter and a second phase shifter, at least one of the first phase shifter and the second phase shifter is the phase shifter according to any one of claims 3 to 8, wherein the side wall of the cavity of the first phase shifter is arranged opposite to the side wall of the cavity of the second phase shifter, and the cavity of the first phase shifter is provided with a first extension wall, and the second phase shifter is provided with a second extension wall, and a groove is provided between the first extension wall and the second extension wall so that the plane of the first extension wall facing the reflective plate is disconnected from the plane of the second extension wall facing the reflective plate.

10. The phase shifter assembly according to claim 9, characterized in that The first extension wall is formed by extending from the top wall of the cavity of the first phase shifter in a direction away from the second phase shifter; the second extension wall is formed by extending from the top wall of the cavity of the second phase shifter in a direction away from the first phase shifter; The first extension wall, the cavity top wall of the first phase shifter, the second extension wall and the cavity top wall of the second phase shifter are coplanar.

11. The phase shifter assembly according to claim 9, characterized in that The cavity top wall of the first phase shifter is at least partially concave, and the cavity top wall of the second phase shifter is at least partially concave, and the concave portion of the first phase shifter and the concave portion of the second phase shifter form the groove.

12. The phase shifter assembly according to claim 9, wherein: The cavity of the first phase shifter and the cavity of the second phase shifter share a side wall.

13. The phase shifter assembly according to claim 9, wherein: The phase shifter assembly further includes a connecting member; the connecting member connects a side wall of the first phase shifter and a side wall of the second phase shifter, or connects a bottom wall of the first phase shifter and a bottom wall of the second phase shifter.

14. An antenna, characterized in that: It comprises a reflecting plate, a radiating unit and the phase shifter described in any one of claims 3 to 8 or the phase shifter assembly described in any one of claims 9 to 13, wherein the radiating unit is arranged on one side of the reflecting plate, and the phase shifter or the phase shifter assembly is arranged on the opposite side, and the phase shifter or the phase shifter assembly is electrically connected to the radiating unit.

15. The antenna according to claim 14, characterized in that The antenna also includes a feeding conductor, a mounting groove penetrating the reflecting plate is provided on the reflecting plate, and a mounting hole corresponding to the mounting groove is provided in the cavity of the phase shifter or the phase shifter assembly, one end of the feeding conductor is connected to the radiation unit, and the opposite end passes through the mounting groove and the mounting hole and is electrically connected to the phase shifting circuit.

16. The antenna according to claim 14, characterized in that The radiation unit includes a vibrator and a vibrator support, and the vibrator is arranged on the phase shifter or the phase shifter component through the vibrator support.

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