Phase shifting medium, phase shifter and base station antenna

Abstract

The utility model discloses a phase-shifting medium, a phase shifter and a base station antenna. The phase-shifting medium comprises a first medium plate and a second medium plate which are oppositely arranged. Wherein a chute for accommodating a phase shift circuit is arranged between the first dielectric plate and the second dielectric plate, the first dielectric plate is provided with a plurality of first matching parts which are sequentially arranged along the extension direction of the chute, and a first matching groove is arranged between any two adjacent first matching parts; the second dielectric plate is provided with a second matching part and a second matching groove, the second matching part is arranged corresponding to the first matching groove, and the second matching groove is arranged corresponding to the first matching part. According to the phase-shifting medium, the phase shifter and the base station antenna provided by the utility model, the matching parts and the matching grooves which are correspondingly arranged are designed on the two medium plates, so that the integral strength of the phase-shifting medium is improved by retaining part of the medium structure while the impedance matching efficiency is maintained.

Description

Technical Field

[0001] The utility model belongs to the technical field of communication, and in particular relates to a phase shift medium, a phase shifter and a base station antenna. Background Art

[0002] Cavity phase shifter is a type of phase shifter widely used in modern base station antenna systems. It consists of metal cavity, phase shift medium and phase shift circuit. The metal cavity not only provides structural protection, but also plays a key role in the propagation characteristics of electromagnetic waves. The interaction between the phase shift medium and the phase shift circuit supports the adjustment of the signal phase, so that the beam directivity can be precisely controlled.

[0003] In the existing cavity phase shifter design, there is a technical challenge, that is, how to achieve effective impedance matching between different media. Because the movement of the phase shift medium causes part of the phase shift circuit port to always be in the medium, while the other part is always in the air (air is also a dielectric with certain dielectric properties), the inconsistency of the relative dielectric constants of different media will lead to impedance mismatch. This impedance inconsistency will cause signal reflection, affecting the signal transmission efficiency and the performance of the phase shifter.

[0004] In order to improve the impedance matching effect, a common method is to open a window on the phase-shifting medium. This approach can provide a gradual transition of impedance, achieve impedance matching of the transmission line, reduce signal reflection, and thus improve signal transmission efficiency. However, this matching method has certain disadvantages, especially in terms of the structural strength of the medium. The window opening process may weaken the physical strength of the phase-shifting medium, reducing the durability and reliability of the phase shifter, especially in long-term operation or under harsh environmental conditions.

[0005] Therefore, it is necessary to provide a new solution to the above technical problems. Utility Model Content

[0006] The utility model aims to provide a phase shifting medium, a phase shifter and a base station antenna, which can improve the structural strength of the phase shifting medium while solving the impedance matching problem.

[0007] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0008] In a first aspect, the utility model provides a phase-shifting medium, which includes a substrate and a first dielectric plate and a second dielectric plate arranged on the substrate and arranged opposite to each other; wherein, a slide groove for accommodating the sliding of a phase-shifting circuit is provided between the first dielectric plate and the second dielectric plate, and a plurality of first matching parts arranged in sequence along the extension direction of the slide groove are provided on the first dielectric plate, and a first matching groove is provided between any two adjacent first matching parts; a second matching part and a second matching groove are provided on the second dielectric plate, and the second matching part is provided corresponding to the first matching groove, and the second matching groove is provided corresponding to the first matching part.

[0009] In one or more embodiments, the distance between the first matching portion and the second matching groove is greater than the width of the slide groove, and / or the distance between the second matching portion and the first matching groove is greater than the width of the slide groove.

[0010] In one or more embodiments, the first matching portion is complementary to the second matching groove structure; and / or the second matching portion is complementary to the first matching groove structure.

[0011] In one or more embodiments, the first matching portion and the second matching portion are identical in shape and size.

[0012] In one or more embodiments, the first matching portion, the first matching slot, the second matching portion and the second matching slot together constitute a first impedance matching region; a second impedance matching region is provided on the phase shifting medium, and a spacer is provided between the second impedance matching region and the first impedance matching region.

[0013] In one or more embodiments, the second impedance matching region includes a third matching portion and a third matching slot provided on the first dielectric plate, and a fourth matching portion and a fourth matching slot provided on the second dielectric plate, the third matching portion being provided corresponding to the fourth matching slot, and the third matching slot being provided corresponding to the fourth matching portion.

[0014] In one or more embodiments, the third matching portion is complementary to the fourth matching slot structure; and / or the fourth matching portion is complementary to the third matching slot structure.

[0015] In one or more embodiments, the sum of the areas of the third matching slots in the second impedance matching region is smaller than the sum of the areas of the first matching slots in the first impedance matching region.

[0016] In one or more embodiments, the first impedance matching region is provided with at least one first matching slot; and the second impedance matching region is provided with at least one third matching slot.

[0017] In one or more embodiments, the phase shifting medium further includes a substrate, and the first dielectric plate and the second dielectric plate are disposed on the substrate.

[0018] In one or more embodiments, the base plate, the first dielectric plate, and the second dielectric plate are integrally formed.

[0019] In the second aspect, the utility model provides a phase shifter, characterized in that it includes a cavity, a phase shifting circuit, a first phase shifting medium and a second phase shifting medium, the first phase shifting medium and the second phase shifting medium are constructed as the phase shifting medium described above, the phase shifting circuit is arranged in the cavity, the first phase shifting medium and the second phase shifting medium are arranged in the cavity and are respectively located on both sides of the phase shifting circuit.

[0020] In one or more embodiments, the first phase shifting medium is disposed at the top of the phase shifting circuit, the second phase shifting medium is disposed at the bottom of the phase shifting circuit, and the first phase shifting medium and the second phase shifting medium are disposed in mirror symmetry.

[0021] In one or more embodiments, the top of the phase shift circuit is accommodated in the slide groove of the first phase shift medium, and the bottom of the phase shift circuit is accommodated in the slide groove of the second phase shift medium, and the first phase shift medium and the second phase shift medium can slide relative to the phase shift circuit.

[0022] In one or more embodiments, a connecting portion is provided at one end of the first phase-shifting medium, a connecting hole is provided on the second phase-shifting medium, and the connecting portion is inserted into the connecting hole.

[0023] In one or more embodiments, the inner wall of the cavity protrudes along the thickness direction of the phase shifting circuit to form a partition wall, and the partition wall divides the cavity into a first receiving cavity and a second receiving cavity. The first phase shifting medium is slidably disposed in the first receiving cavity, and the second phase shifting medium is slidably disposed in the second receiving cavity.

[0024] In one or more embodiments, a avoidance groove matching the partition wall is formed between the first phase-shifting medium and the second phase-shifting medium, and the partition wall is disposed in the avoidance groove.

[0025] In one or more embodiments, a limiting member is fixedly connected to the cavity, the limiting member has a limiting portion, the limiting portion is passed through the avoiding groove, one end of the phase shifting circuit is provided with a limiting groove matching the limiting portion, and the limiting portion is clamped in the limiting groove.

[0026] In a third aspect, the utility model provides a base station antenna, characterized in that it includes the phase shifting medium or phase shifter as described above.

[0027] Compared with the prior art, the phase-shifting medium, phase shifter and base station antenna provided by the utility model provide a track for the sliding of the phase-shifting circuit by setting a sliding groove between the first dielectric plate and the second dielectric plate, and the phase-shifting circuit can be limited by the phase-shifting medium. Therefore, there is no need to provide a limiting structure for limiting the phase-shifting circuit on the cavity of the phase shifter, which can increase the space utilization of the cavity; and corresponding matching parts and matching grooves are designed on the two dielectric plates, which constitute a new type of impedance matching area. This structure improves the overall strength of the phase-shifting medium by retaining part of the dielectric structure while maintaining the impedance matching performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of a phase shift medium in one embodiment of the utility model;

[0030] Figure 2 It is a three-dimensional structural diagram of a phase shifter in one embodiment of the utility model;

[0031] Figure 3 Figure 2 a cross-sectional view of the phase shifter shown;

[0032] Figure 4 Figure 2 An exploded schematic diagram of the phase shifter shown;

[0033] Figure 5 Figure 2 A cross-sectional view of a cavity in the phase shifter shown;

[0034] Figure 6 Figure 2 A cross-sectional view of the phase shifting medium in the phase shifter shown.

[0035] Description of main reference numerals:

[0036] 11-first dielectric plate, 111-first matching part, 112-first matching groove, 113-third matching part, 114-third matching groove, 12-second dielectric plate, 121-second matching part, 122-second matching groove, 123-fourth matching part, 124-fourth matching groove 124, 13-substrate, 14-slide groove, 101-first impedance matching area, 102-second impedance matching area, 103-spacer, 20-cavity, 21-partition wall, 22-first receiving cavity, 23-second receiving cavity, 30-phase shifting circuit, 31-limiting groove, 40-first phase shifting medium, 41-connecting part, 50-second phase shifting medium, 51-connecting hole, 60-avoiding groove, 70-limiting member, 71-limiting part. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0038] 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.

[0039] In the prior art, phase shifters play an important role in achieving beam pointing and shape adjustment. Impedance matching problems and insufficient dielectric structure strength are key factors affecting their performance and reliability. Especially for cavity phase shifters, the inventors found that although the prior art can achieve a certain degree of beam directivity adjustment, it has significant defects in impedance matching and structural strength. Specifically, although the traditional windowed impedance matching method solves the impedance matching problem to a certain extent, the physical strength of the phase-shifting medium is weakened due to the window opening in the structure, which may cause problems in long-term operation or in harsh environments, such as damage to the medium or functional degradation.

[0040] On this basis, the inventor proposed a new technical implementation idea. The core of this idea is to achieve optimized impedance matching and improve structural strength by constructing an improved phase-shifting medium structure, so as to reduce the strength loss caused by the traditional window design. The utility model adopts an innovative multi-matching part and matching slot structure, which significantly improves the overall strength of the phase-shifting medium by retaining part of the medium structure while maintaining the impedance matching performance.

[0041] The technical implementation idea of ​​the utility model is to provide a phase shift medium having a first dielectric plate and a second dielectric plate, a slide groove for sliding the phase shift circuit is arranged between the first dielectric plate and the second dielectric plate, and complementary matching parts and matching grooves are designed on the two dielectric plates, which constitute a new type of impedance matching area. Through such a design, not only more accurate impedance matching is achieved at different frequencies, but also the structural strength of the phase shift medium is maintained through the staggered comb structure, thereby improving the durability and reliability of the phase shifter.

[0042] Please refer to Figure 1 As shown, the phase shift medium in one embodiment of the utility model includes a substrate 13 and a first dielectric plate 11 and a second dielectric plate 12 disposed on the substrate 13 and arranged opposite to each other. Among them, there is a slide groove 14 for accommodating the phase shift circuit between the first dielectric plate 11 and the second dielectric plate 12, and the first dielectric plate 11 is provided with a plurality of first matching parts 111 arranged in sequence along the extension direction of the slide groove 14, and a first matching groove 112 is provided between any two adjacent first matching parts 111. A second matching part 121 and a second matching groove 122 are provided on the second dielectric plate 12, and the second matching part 121 is provided corresponding to the first matching groove 112, and the second matching groove 122 is provided corresponding to the first matching part 111.

[0043] The shape and size relationship between the second matching portion 121 and the first matching groove 112, and the shape and size relationship between the second matching groove 122 and the first matching portion 111 can be designed according to actual needs. For example, it can be designed that the projection of the second matching portion 121 on the first dielectric plate completely falls into the first matching groove 112, or it can be designed that the projection of the second matching portion 121 on the first dielectric plate partially falls into the first matching groove 112.

[0044] Preferably, the first matching portion 111 and the second matching slot 122 are complementary in structure. The second matching portion 121 and the first matching slot 112 are complementary in structure. The complementary structural design makes the impedance of any cross section of the phase-shifting medium perpendicular to the sliding direction of the phase-shifting medium completely consistent, and the impedance matching is more advantageous.

[0045] It should be noted that, in the technical solution provided by the present invention, the second matching portion 121 and the first matching groove 112 are structurally complementary, and the first matching portion 111 and the second matching groove 122 are structurally complementary, which means that the two are structurally complementary, that is, the second matching portion 121 can just fill the first matching groove 112 and complete the first matching groove 112.

[0046] The substrate 13, the first dielectric plate 11 and the second dielectric plate 12 together constitute the main structure of the phase-shifting medium. The substrate 13 is the supporting structure of the entire phase-shifting medium, and provides support for the first dielectric plate 11 and the second dielectric plate 12. The substrate 13, the first dielectric plate 11 and the second dielectric plate 12 can be formed by an integrated molding process. The first dielectric plate 11 and the second dielectric plate 12 are both arranged on the substrate 13, and they are arranged opposite to each other, forming two sides of the slide groove 14, thereby providing the phase-shifting medium with a track that can slide relative to the phase-shifting circuit. The design of the aforementioned slide groove 14 structure can limit the phase-shifting circuit by the phase-shifting medium, so there is no need to provide a limiting structure for limiting the phase-shifting circuit on the cavity of the phase shifter, which can increase the space utilization of the cavity.

[0047] A plurality of first matching parts 111 are designed on the first dielectric plate 11, which are arranged in sequence along the extension direction of the slide slot 14, and a first matching slot 112 is arranged between every two adjacent first matching parts 111, that is, the first matching parts 111 and the first matching slots 112 are arranged alternately. The second matching part 121 and the second matching slot 122 on the second dielectric plate 12 are complementary to the structure on the first dielectric plate 11, and the second matching part 121 is arranged at the position of the first matching slot 112, and the second matching slot 122 corresponds to the position of the first matching part 111. The arrangement of the first matching slot 112 and the second matching slot 122 allows a part of the phase shift circuit to be exposed to the air, thereby playing an impedance matching role. The arrangement of the first matching part 111 and the second matching part 121 can play a role in structural reinforcement.

[0048] In an exemplary embodiment, the distance between the first matching portion 111 and the second matching groove 122 is greater than the width of the slide groove 14 , and / or the distance between the second matching portion 121 and the first matching groove 112 is greater than the width of the slide groove 14 .

[0049] The design of the width of the slide groove 14 ensures that the phase shift medium maintains a relatively fixed position with respect to the phase shift circuit during the sliding process. By designing the distance between the matching portion and the matching groove to be larger than the width of the slide groove 14, it is further ensured that there will be no interference with the matching structure on the opposite side during the movement, thereby avoiding potential physical collision or damage.

[0050] When the distance between the matching portion and the corresponding matching groove is greater than the width of the slide groove 14, the impedance of the region can be increased, which is beneficial to achieve impedance matching.

[0051] Specifically, the first matching section 111 and the second matching section 121 have the same shape and size. Matching sections of the same shape and size can achieve consistent impedance characteristics throughout the phase shifter. This uniformity helps optimize the overall electromagnetic wave transmission path and ensures that the impedance change of the electromagnetic wave inside the phase shift medium is smooth and continuous, which is crucial for improving signal integrity and reducing reflections. From a physical structure perspective, matching sections of the same shape and size can ensure that the phase shifter maintains structural symmetry when sliding the phase shift circuit, which helps reduce non-ideal phenomena in electromagnetic wave propagation caused by structural asymmetry, such as mode deflection or signal distortion.

[0052] In an exemplary embodiment, the first matching portion 111 , the first matching slot 112 , the second matching portion 121 and the second matching slot 122 together constitute a first impedance matching region 101 ; a second impedance matching region 102 is provided on the phase shifting medium, and a spacer 103 is provided between the second impedance matching region 102 and the first impedance matching region 101 .

[0053] The second impedance matching region 102 is designed to be similar to the first impedance matching region 101, but can be optimized for a different frequency range. Thus, after the electromagnetic wave propagates through the first matching region, it will then enter the second matching region, which further adjusts the impedance of the electromagnetic wave and expands the matching frequency range. The second impedance matching region 102 can achieve its specific frequency response through different matching parts and matching slot sizes, shapes, spacings, and arrangements.

[0054] A single impedance matching region may result in a limited bandwidth of the phase shifter. The spacer 103 is located between the first impedance matching region 101 and the second impedance matching region 102. As a transition region, by introducing the second impedance matching region 102 and the spacer 103, the operating bandwidth of the phase shifter can be effectively expanded to avoid affecting the performance of the communication system due to too narrow bandwidth. By setting two impedance matching regions, the phase shifter can achieve stable impedance matching in a wider frequency range, thereby increasing the bandwidth. The first impedance matching region 101 may be optimized for the low frequency band, while the second impedance matching region 102 may be optimized for the high frequency band. The combination of the two enables the entire phase shifter to operate in a wide frequency range.

[0055] Specifically, the second impedance matching region 102 includes a third matching portion 113 and a third matching slot 114 provided on the first dielectric plate 11, and a fourth matching portion 123 and a fourth matching slot 124 provided on the second dielectric plate 12, the third matching portion 113 is provided corresponding to the fourth matching slot 124 and is complementary to the fourth matching slot 124, and the third matching slot 114 is provided corresponding to the fourth matching portion 123 and is complementary to the fourth matching portion 123. The matching portion and matching slot structure of the second impedance matching region 102 are similar to those of the first impedance matching region 101, and the length of the second impedance matching region 102 is relatively shorter than that of the first impedance matching region 101.

[0056] The sum of the areas of the third matching slots 114 of the second impedance matching region 102 is smaller than the sum of the areas of the first matching slots 112 of the first impedance matching region 101. The first impedance matching region 101 is provided with at least two first matching slots 123; the second impedance matching region 102 is provided with at least one third matching slot 114.

[0057] Please refer to Figures 2 to 4 As shown, in one embodiment of the utility model, a phase shifter is provided, which includes a cavity 20, a phase shifting circuit 30, a first phase shifting medium 40 and a second phase shifting medium 50. The first phase shifting medium 40 and the second phase shifting medium 50 are constructed as the phase shifting medium in the aforementioned embodiment. The phase shifting circuit 30 is arranged in the cavity 20, and the first phase shifting medium 40 and the second phase shifting medium 50 are arranged in the cavity 20 and are respectively located on both sides of the phase shifting circuit 30.

[0058] The cavity 20 of the phase shifter is usually made of metal or other electromagnetic wave reflecting materials, forming a closed space for accommodating the phase shift circuit 30 and the first phase shift medium 40 and the second phase shift medium 50. The design of the cavity 20 not only protects the internal structure from the external environment, but also affects the propagation path and mode of the electromagnetic wave.

[0059] The phase shift circuit 30 is a core component for realizing phase control, and its design can be realized based on different technologies, such as PIN diode, microstrip line, waveguide or MEMS technology, etc. The phase shift circuit 30 is arranged inside the cavity 20, and realizes phase adjustment by changing the propagation characteristics of electromagnetic waves in the circuit (such as path length, medium characteristics, etc.).

[0060] The first phase shifting medium 40 and the second phase shifting medium 50 are designed as described above, i.e., include a matching part and a matching slot structure, and these media are arranged in the cavity 20 and are respectively located on both sides of the phase shifting circuit 30. This layout helps to achieve uniform impedance matching inside the entire phase shifter and reduce reflection and loss.

[0061] In an exemplary embodiment, please refer to Figure 3As shown, the first phase shift medium 40 is disposed at the top of the phase shift circuit 30, and the second phase shift medium 50 is disposed at the bottom of the phase shift circuit 30, and the first phase shift medium 40 and the second phase shift medium 50 are disposed in mirror symmetry.

[0062] By arranging the first phase shift medium 40 and the second phase shift medium 50 in mirror symmetry, it is ensured that the cross-sectional impedances of the two are consistent in the cross section perpendicular to the phase shift circuit 30. This consistency is the key to optimizing impedance matching, because it means that when the electromagnetic wave passes through the phase shift circuit 30 and the media on both sides thereof, it will encounter balanced electromagnetic conditions, reducing reflection and scattering, thereby improving the transmission efficiency and quality of the signal.

[0063] For the phase shift circuit 30 using a U-shaped trace, the first phase shift medium 40 is responsible for the line transformation of the upper half of the U-shaped trace, and the second phase shift medium 50 is responsible for the line impedance transformation of the lower half of the U-shaped trace, thereby optimizing the overall return loss of the U-shaped trace and reducing the transmission loss.

[0064] Specifically, the top of the phase shift circuit 30 is received in the slide groove of the first phase shift medium 40, and the bottom of the phase shift circuit 30 is received in the slide groove of the second phase shift medium 50, so that the first phase shift medium 40 and the second phase shift medium 50 can slide relative to the phase shift circuit 30. By adjusting the positions of the first phase shift medium 40 and the second phase shift medium 50 relative to the phase shift circuit 30, the propagation conditions of the electromagnetic wave in the phase shifter can be finely controlled.

[0065] In an exemplary embodiment, please refer to Figure 4 and Figure 6 As shown, a connecting portion 41 is provided at one end of the first phase shifting medium 40, and a connecting hole 51 is provided on the second phase shifting medium 50, and the connecting portion 41 is inserted into the connecting hole 51. A connecting portion 41 is designed at one end of the first phase shifting medium 40, which is a protruding structure, which may be cylindrical, rod-shaped or a protrusion with a specific shape, and is specifically used to cooperate with the connecting hole 51 of the second phase shifting medium 50. A connecting hole 51 that cooperates with the connecting portion 41 is provided on the second phase shifting medium 50, and is used to receive the connecting portion 41 of the first phase shifting medium 40. The size, shape and depth of the connecting hole 51 match the connecting portion 41 to ensure that the two phase shifting media can be tightly and accurately connected.

[0066] Through the cooperation of the connecting portion 41 and the connecting hole 51, the first and second phase shifting media 50 can be accurately aligned and fixed at a predetermined position. This mechanical connection method improves the structural stability of the phase shifter, especially when facing mechanical vibration or external impact, it can reduce the relative movement of internal components and ensure the consistency and reliability of the phase shifter performance.

[0067] In an exemplary embodiment, please refer to Figure 3 and Figure 5As shown, the inner wall of the cavity 20 protrudes along the thickness direction of the phase shifting circuit 30 to form a partition wall 21, and the partition wall 21 divides the cavity 20 into a first receiving cavity 22 and a second receiving cavity 23. The first phase shifting medium 40 is slidably disposed in the first receiving cavity 22, and the second phase shifting medium 50 is slidably disposed in the second receiving cavity 23.

[0068] The partition wall 21 is a structure formed by the inner wall of the cavity 20 protruding along the thickness direction of the phase shift circuit 30. Its function is to separate the cavity 20 into two independent receiving cavities. At the same time, the partition wall 21 can increase the isolation between the traces on the phase shift circuit 30 and reduce the coupling effect.

[0069] Specifically, a clearance groove 60 matching with the partition wall 21 is formed between the first phase shifting medium 40 and the second phase shifting medium 50, and the partition wall 21 is arranged in the clearance groove 60. The clearance groove 60 provides a clear positioning space for the partition wall 21, which helps to achieve fast and accurate assembly during the assembly process. At the same time, this structural design also enhances the mechanical stability of the entire phase shifter, avoiding possible gaps or looseness caused by the mismatch between the partition wall 21 and the phase shifting medium.

[0070] For further information, please refer to Figures 2 to 4 As shown, a limiting member 70 is fixedly connected to the cavity 20, and the limiting member 70 has a limiting portion 71, which is inserted into the avoiding groove 60. One end of the phase shifting circuit 30 is provided with a limiting groove 31 matching the limiting portion 71, and the limiting portion 71 is clamped in the limiting groove 31.

[0071] The stopper 70 is a component fixedly connected to the cavity 20, and the stopper 70 can be stably connected to the cavity 20 by snaps, screws, welding or other mechanical fixing methods. The stopper 71 is a part of the stopper 70, which is inserted into the avoidance groove 60, and the shape and size are designed to be able to accurately match and clamp in the stopper groove 31 at the end of the phase shift circuit 30. Through the mutual clamping cooperation between the stopper 71 and the stopper groove 31, the displacement of the phase shift circuit 30 relative to the cavity 20 can be limited.

[0072] In one embodiment of the utility model, a base station antenna is further provided, which includes the aforementioned phase shift medium or phase shifter.

[0073] In summary, the phase-shifting medium, phase shifter and base station antenna provided by the utility model, by setting a slide groove between the first dielectric plate and the second dielectric plate, limit the phase-shifting circuit through the phase-shifting medium, so there is no need to provide a limiting structure for limiting the phase-shifting circuit on the cavity of the phase shifter, which can increase the space utilization of the cavity; and corresponding matching parts and matching grooves are designed on the two dielectric plates, which constitute a new type of impedance matching area. This structure improves the overall strength of the phase-shifting medium by retaining part of the dielectric structure while maintaining the impedance matching performance.

[0074] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0075] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A phase shifting medium, characterized in that: It includes a first dielectric plate and a second dielectric plate which are arranged opposite to each other; Wherein, a slide groove for accommodating a phase shift circuit is provided between the first dielectric plate and the second dielectric plate, a plurality of first matching parts arranged in sequence along the extension direction of the slide groove are provided on the first dielectric plate, and a first matching groove is provided between any two adjacent first matching parts; A second matching portion and a second matching slot are provided on the second dielectric plate. The second matching portion is arranged corresponding to the first matching slot, and the second matching slot is arranged corresponding to the first matching portion.

2. The phase shifting medium according to claim 1, characterized in that: The distance between the first matching portion and the second matching groove is greater than the width of the sliding groove, and / or The distance between the second matching portion and the first matching groove is greater than the width of the sliding groove.

3. The phase shifting medium according to claim 1, characterized in that: The first matching portion is complementary to the second matching groove structure; and / or The second matching portion is complementary to the first matching groove structure.

4. The phase shifting medium according to claim 1, characterized in that: The first matching portion and the second matching portion have the same shape and size.

5. The phase shifting medium according to claim 1, characterized in that: The first matching part, the first matching slot, the second matching part and the second matching slot together constitute a first impedance matching region; a second impedance matching region is provided on the phase shifting medium, and a spacing part is provided between the second impedance matching region and the first impedance matching region.

6. The phase shifting medium according to claim 5, characterized in that: The second impedance matching area includes a third matching part and a third matching slot provided on the first dielectric plate, and a fourth matching part and a fourth matching slot provided on the second dielectric plate, the third matching part is provided corresponding to the fourth matching slot, and the third matching slot is provided corresponding to the fourth matching part.

7. The phase shifting medium according to claim 6, characterized in that: The third matching portion is structurally complementary to the fourth matching groove; and / or The fourth matching portion is structurally complementary to the third matching groove.

8. The phase shifting medium according to claim 6, characterized in that: The sum of areas of the third matching slots in the second impedance matching region is smaller than the sum of areas of the first matching slots in the first impedance matching region.

9. The phase shifting medium according to claim 8, characterized in that: The first impedance matching region is provided with at least one first matching slot; the second impedance matching region is provided with at least one third matching slot.

10. The phase shifting medium according to claim 1, characterized in that: The phase shifting medium further includes a substrate, and the first dielectric plate and the second dielectric plate are arranged on the substrate.

11. The phase shifting medium according to claim 10, characterized in that: The base plate, the first dielectric plate and the second dielectric plate are configured to be integrally formed.

12. A phase shifter, characterized in that: The invention comprises a cavity, a phase shifting circuit, a first phase shifting medium and a second phase shifting medium, wherein the first phase shifting medium and the second phase shifting medium are constructed as the phase shifting medium as described in any one of claims 1 to 11, the phase shifting circuit is arranged in the cavity, and the first phase shifting medium and the second phase shifting medium are arranged in the cavity and are respectively located on both sides of the phase shifting circuit.

13. The phase shifter according to claim 12, characterized in that: The first phase shifting medium is arranged at the top of the phase shifting circuit, the second phase shifting medium is arranged at the bottom of the phase shifting circuit, and the first phase shifting medium and the second phase shifting medium are arranged in mirror symmetry.

14. The phase shifter according to claim 13, characterized in that The top of the phase shift circuit is received in the slide groove of the first phase shift medium, and the bottom of the phase shift circuit is received in the slide groove of the second phase shift medium. The first phase shift medium and the second phase shift medium can slide relative to the phase shift circuit.

15. The phase shifter according to claim 12, characterized in that: A connecting portion is provided at one end of the first phase-shifting medium, a connecting hole is provided on the second phase-shifting medium, and the connecting portion is inserted into the connecting hole.

16. The phase shifter according to claim 12, characterized in that: The inner wall of the cavity protrudes along the thickness direction of the phase shifting circuit to form a partition wall, which divides the cavity into a first receiving cavity and a second receiving cavity. The first phase shifting medium is slidably disposed in the first receiving cavity, and the second phase shifting medium is slidably disposed in the second receiving cavity.

17. The phase shifter according to claim 16, characterized in that A avoidance groove matching the partition wall is formed between the first phase-shifting medium and the second phase-shifting medium, and the partition wall is arranged in the avoidance groove.

18. The phase shifter according to claim 17, characterized in that A limiting member is fixedly connected to the cavity, the limiting member has a limiting portion, the limiting portion is inserted into the avoiding groove, one end of the phase shifting circuit is provided with a limiting groove matching the limiting portion, and the limiting portion is clamped in the limiting groove.

19. A base station antenna, characterized in that: The method comprises the phase shifting medium according to any one of claims 1 to 11 or the phase shifter according to any one of claims 12 to 18.

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