Phase shifter and base station antenna

Abstract

The embodiment of the invention provides a phase shifter and a base station antenna, and relates to the technical field of antennae, the phase shifter comprises at least one main body, the main body comprises a metal cavity, and the interior of the metal cavity is hollow; the phase shifting plate is mounted in the metal cavity; the output interfaces comprise matching pieces and connecting pieces, the matching pieces are arranged outside the metal cavity, the matching pieces are electrically connected with the phase shifting plate through the connecting pieces, and the matching pieces are used for being connected with coaxial cables. According to the phase shifter and the base station antenna provided by the embodiment of the invention, the problem that the using effect of the phase shifter is poor due to the fact that the width of the metal cavity is large in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of antennas, and in particular to a phase shifter and a base station antenna. Background Art

[0002] The phase shifter is the core component of the base station antenna. The phase shifter mainly transmits the input signal of the main feeder to each oscillator at a certain power and phase to achieve the beamforming effect.

[0003] In the related art, the phase shifter usually includes a metal cavity and a phase shifter plate. The phase shifter plate is arranged in the metal cavity and is connected to an input feeder. A plurality of output interfaces are arranged on the edge of the phase shifter plate. Each output interface is located in the metal cavity and each output interface is used to be connected to each vibrator outside the phase shifter through a coaxial cable. When in use, the signal is input through the input feeder line, and after passing through the phase shifter, it is transmitted from each output interface to each vibrator.

[0004] However, in the above phase shifter, the width of the metal cavity is relatively large, so that the resonance point of the metal cavity is too low, which is not conducive to improving the resonance frequency of the metal cavity, thereby making it difficult to design the phase shifter to a higher frequency, resulting in poor use effect of the phase shifter. Summary of the invention

[0005] The embodiments of the present application provide a phase shifter and a base station antenna to solve the problem in the prior art that the width of the metal cavity is large, making it difficult to design the phase shifter to a higher frequency, thereby resulting in poor use effect of the phase shifter.

[0006] In a first aspect, an embodiment of the present application provides a phase shifter, including: at least one main body, the main body including:

[0007] A metal cavity, wherein the interior of the metal cavity is hollow;

[0008] A phase shifter plate, the phase shifter plate is installed in the metal cavity;

[0009] Multiple output interfaces, the output interfaces include matching pieces and connecting pieces, each of the matching pieces is arranged outside the metal cavity, the matching pieces are electrically connected to the phase shifter through the connecting piece, and the matching pieces are used to connect the coaxial cables.

[0010] In a possible implementation manner, a plurality of fixing grooves are provided on the outer surface of the metal cavity, and the matching piece is inserted into the fixing grooves.

[0011] In a possible implementation manner, the matching component is provided with a first wiring block, and the first wiring block is provided with a first connecting groove for clamping the coaxial cable.

[0012] In a possible implementation manner, the matching piece is provided with an elastic portion, a positioning protrusion is provided on the elastic portion, and a positioning hole for matching with the positioning protrusion is opened on the outer wall of the metal cavity.

[0013] In a possible implementation, the connecting member includes a pin, the pin is inserted into the metal cavity, and the pin is electrically connected to the matching member and the phase shifter at the same time.

[0014] In a possible implementation manner, a first slot is provided at a position of the metal cavity corresponding to the matching piece, a second slot is provided on the matching piece, and the pin is plugged into the second slot and the first slot at the same time.

[0015] In a possible implementation manner, a plurality of second wiring blocks are disposed on the outer wall of the metal cavity, and the second wiring blocks are provided with second connecting grooves.

[0016] In a possible implementation manner, mounting grooves are provided at two opposite ends of the metal cavity, and two opposite ends of the phase shifting plate are respectively and correspondingly clamped in the two mounting grooves.

[0017] In a possible implementation manner, the phase shifting plate includes a plurality of plate units arranged in sequence and a transition piece electrically connecting two adjacent plate units.

[0018] In a second aspect, an embodiment of the present application provides a base station antenna, comprising an input feeder, a plurality of vibrators and a phase shifter as described in any of the above embodiments, wherein the input feeder is electrically connected to a phase shifter plate in the phase shifter, and each of the vibrators is respectively electrically connected to a matching component or a phase shifter plate in the phase shifter.

[0019] The embodiment of the present application provides a phase shifter and a base station antenna, wherein the phase shifter is provided by: a metal cavity, the interior of which is hollow; a phase shifter plate, which is installed in the metal cavity; and a plurality of output interfaces, wherein the output interface includes a matching part and a connecting part, each matching part is provided outside the metal cavity, the matching part is electrically connected to the phase shifter plate through the connecting part, and the matching part is used to connect the coaxial cable. Thus, at least part of the output interface (such as the matching part) is provided outside the metal cavity, thereby reducing the occupation of the internal space of the metal cavity, and the required width of the metal cavity can be reduced, so that the metal cavity has a higher resonance point, so that the metal cavity can be designed to a higher frequency; and the phase shifter can also use a medium with a larger dielectric constant, shorten the phase shifter stroke, and is conducive to reducing the length of the phase shifter, solving the problem in the prior art that the metal cavity width is large, making it difficult to design the phase shifter to a higher frequency, and thus resulting in poor use effect of the phase shifter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] Figure 1 A schematic diagram of a partial explosion structure of a phase shifter provided in an embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of the structure of the phase shift network on the traditional phase shift plate;

[0023] Figure 3 This is a schematic diagram of the structure of the phase shift network on the phase shift plate in an embodiment of the present application;

[0024] Figure 4 for Figure 1 A schematic diagram of the structure of the first wiring block;

[0025] Figure 5 This is a schematic diagram of a partial explosion structure of a two-layer metal cavity in an embodiment of the present application;

[0026] Figure 6 for Figure 5 Schematic diagram of the structure of the connecting parts;

[0027] Figure 7 for Figure 1 A schematic diagram of the structure of the second wiring block;

[0028] Figure 8 for Figure 1 A cross-sectional view of the metal cavity;

[0029] Fig. 9 for Figure 1 Schematic diagram of the local structure of the phase shifter.

[0030] Description of reference numerals:

[0031] 10-coaxial cable;

[0032] 100-metal cavity; 110-fixing slot; 120-installation slot;

[0033] 200-phase shifting plate; 210-plate unit; 220-adapter;

[0034] 300-output interface; 310-matching member; 320-connecting member; 321-first slot; 322-second slot; 330-first wiring block; 331-first connecting slot; 332-elastic part; 333-positioning protrusion; 334-positioning hole;

[0035] 400 - second junction block; 410 - second connection slot; 420 - tin guide slot;

[0036] a1-first layer line; a2-second layer line; a3-third layer line; a4-fourth layer line.

[0037] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0039] In related technologies, phase shifters are the core components of base station antennas. Phase shifters mainly transmit the input signal of the main feeder to each vibrator at a certain power and phase (the vibrator is the radiating element of the antenna, responsible for converting the RF signal into electromagnetic waves for radiation, and also receiving external electromagnetic waves and converting them into RF signals), to achieve the effect of beamforming. By changing the phase shifting structure of the phase shifter through the transmission structure to change the phase difference of the signal reaching each vibrator, the downtilt angle of the antenna beam can be adjusted to adjust the signal coverage range.

[0040] The phase shifter usually includes a metal cavity and a phase shifter plate. The phase shifter plate is arranged in the metal cavity and is connected to an input feeder. The edge of the phase shifter plate is provided with multiple output interfaces, each of which is located in the metal cavity. Each output interface is used to be connected to each vibrator outside the phase shifter through a coaxial cable. When in use, the signal is input through the input feeder, and after passing through the phase shifter, it is transmitted from each output interface to each vibrator.

[0041] However, in the above-mentioned phase shifter, the phase shifter plate and each output interface are located inside the metal cavity, which easily leads to a larger width of the metal cavity, so that the resonance point of the metal cavity is too low, which is not conducive to improving the resonance frequency of the metal cavity, thereby making it difficult to design the phase shifter to a higher frequency, resulting in poor use effect of the phase shifter.

[0042] Therefore, the embodiment of the present application provides a phase shifter and a base station antenna, wherein the phase shifter is provided by: a metal cavity, the interior of the metal cavity is hollow; a phase shifter plate, the phase shifter plate is installed in the metal cavity; a plurality of output interfaces, the output interface includes a matching part and a connecting part, each matching part is arranged outside the metal cavity, the matching part is electrically connected to the phase shifter plate through the connecting part, and the matching part is used to connect the coaxial cable. Therefore, at least part of the output interface (such as the matching part) is arranged outside the metal cavity, thereby reducing the occupation of the internal space of the metal cavity, and the required width of the metal cavity can be reduced, so that the metal cavity has a higher resonance point, so that the metal cavity can be designed to a higher frequency; and the phase shifter can also use a medium with a larger dielectric constant, shorten the phase shifter stroke, and is conducive to reducing the length of the phase shifter, solving the problem in the prior art that the metal cavity width is large, making it difficult to design the phase shifter to a higher frequency, and thus resulting in poor use effect of the phase shifter.

[0043] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0044] like Figure 1 As shown, a phase shifter provided in an embodiment of the present application includes: at least one main body, the main body includes:

[0045] The metal cavity 100 is hollow inside;

[0046] A phase shift plate 200, the phase shift plate 200 is installed in the metal cavity 100;

[0047] Multiple output interfaces 300 , the output interfaces 300 include matching pieces 310 and connectors 320 , each matching piece 310 is disposed outside the metal cavity 100 , the matching piece 310 is electrically connected to the phase shifter 200 via the connector 320 , and the matching piece 310 is used to connect the coaxial cable 10 .

[0048] The metal cavity 100 is hollow inside, so that the metal cavity 100 is in a long box-shaped structure. The phase shifter 200 is in a long strip-shaped structure and is arranged inside the metal cavity 100, so that the extension direction of the phase shifter 200 is consistent with the extension direction of the metal cavity 100. The phase shifter 200 can be in the form of a PCB or a metal strip line. During implementation, the input feeder can be electrically connected to the phase shifter 200 to transmit the signal to the phase shifter 200.

[0049] Secondly, multiple output interfaces 300 are distributed along the length direction of the phase shift plate 200, and each output interface 300 is located on the same long side of the metal cavity 100. The output interface 300 includes a matching piece 310 and a connecting piece 320. The matching piece 310 is arranged on the outer wall of the metal cavity 100, and the connecting piece 320 is installed on the metal cavity 100. The connecting piece 320 is connected to the matching piece 310 and the phase shift plate 200 at the same time, so that the matching piece 310 is electrically connected to the phase shift network on the phase shift plate 200 through the connecting piece 320. During implementation, each matching piece 310 can be connected to each vibrator respectively, so that the signal is transmitted from each output interface 300 to each vibrator after passing through the phase shifter. Therefore, at least a portion of the output interface 300 (such as the matching piece 310) is arranged outside the metal cavity 100, thereby reducing the occupation of the internal space of the metal cavity 100, and reducing the required width of the metal cavity 100, so that the metal cavity 100 has a higher resonance point, so that the metal cavity 100 can be designed to a higher frequency; and the phase shifter can also use a medium with a larger dielectric constant, shortening the phase shifter stroke, which is conducive to reducing the length of the phase shifter, and solves the problem in the prior art that the width of the metal cavity 100 is large, making it difficult to design the phase shifter to a higher frequency, thereby resulting in a poor use effect of the phase shifter.

[0050] Secondly, the external microstrip matching circuit (i.e., matching element 310) can integrate filtering and impedance transformation, improve the isolation between different frequencies, and be more flexibly designed according to the antenna performance indicators.

[0051] During implementation, the coaxial cable 10 can be welded without bending and passing through the metal cavity 100, thereby reducing the possibility of phase discontinuity and having better phase consistency. In addition, it can reduce the use of high-power welding equipment during the phase shifter welding process, reduce energy consumption during the production process, and facilitate replacement and repair.

[0052] For example, Figure 2 As shown, in the conventional phase shifter, the phase shift network on the phase shift plate 200 is distributed along the width direction with four layers of lines, namely the first layer of lines a1, the second layer of lines a2, the third layer of lines a3 and the fourth layer of lines a4. Among them, the fourth layer of lines a4 is a plurality of output interfaces 300, and the fourth layer of lines a4 plays the role of converting the air strip line characteristic impedance of the phase shift unit The impedance is transformed to 50 ohms through a stripline.

[0053] In this embodiment, if Figure 3As shown, the phase shift network on the phase shift plate 200 has only three layers of circuits, namely: the first layer of circuit a1, the second layer of circuit a2, and the third layer of circuit a3. At this time, the fourth layer of circuit a4 on the phase shift plate 200 is removed, and the fourth layer of circuit a4 is moved to the outside of the metal cavity 100 by using the matching member 310 and the connecting member 320, so that the matching member 310 and the connecting member 320 together The impedance is transformed to 50 ohms.

[0054] In contrast, by moving the fourth layer line a4 in the phase shift network to the outside of the metal cavity 100 through the matching piece 310 and the connector 320, the phase shift network of the four-layer line in the metal cavity 100 is changed into a phase shift network of the three-layer line, and the width of the metal cavity 100 is further reduced, so that the metal cavity 100 has a higher resonance point, so that the phase shifter can be designed to a higher operating frequency band, and a medium with a larger dielectric constant can be used to reduce the physical sliding distance of the medium and shorten the overall length of the phase shifter.

[0055] For example, the phase shift network has the same first, second and third layer circuits of the phase shift plate 200, the width (a) of the conventional metal cavity 100 (the phase shift plate 200 also has the fourth layer circuit a4) is 26mm, and it is assumed that the length of the 1-output 12-port phase shifter is 1200mm, the height is 5.5mm, and the relative dielectric constant of the dielectric-filled metal cavity 100 is 3.0, then the lowest resonant frequency is approximately:

[0056] =3.33GHz

[0057] It can be seen that the lowest resonant frequency is calculated to be 3.33 GHz. A series of resonant points will appear in the phase shifter above 3.33 GHz, causing the performance of the phase shifter to deteriorate.

[0058] In this embodiment, the fourth layer line a4 is eliminated from the phase shift network on the phase shift plate 200. To this end, the width of the metal cavity 100 can be reduced. For example, the width of the metal cavity 100 can be reduced by 5 mm. Then, when other parameters remain unchanged, the lowest resonant frequency is calculated to be 4.12 GHz. In comparison, a higher operating frequency can be supported.

[0059] It should be noted that the main body can be one, two or other numbers, and there is no limitation on this. When there are multiple main bodies, the metal cavities 100 in each main body can be connected to each other to form a phase shifter with multiple layers of metal cavities 100.

[0060] In other embodiments, the matching pieces 310 may be arranged on both sides of the cavity and then connected by the connector 320. The grounding method of the matching piece 310 may be a coupling method, or a via hole and a pad may be arranged on the front of the matching piece 310 to connect the ground and connect the metal cavity 100 on both sides by welding. It can be set to 75 ohms, the phase shifter and the vibrator are connected by a coaxial cable 10, and the matching circuit is in the vibrator feed line or the vibrator is set to an input impedance of 75 ohms. It is also possible not to perform impedance transformation and adjust the input impedance of the vibrator itself to the characteristic impedance of the air strip line of the phase shift unit. , adjust the port position, directly feed the connected vibrator, and realize cable-free feeding.

[0061] like Figure 1 As shown, in some embodiments, a plurality of fixing grooves 110 are provided on the outer surface of the metal cavity 100 , and the matching pieces 310 are inserted into the fixing grooves 110 .

[0062] Specifically, the fixing groove 110 is formed by two parallel and spaced-apart tracks. The two tracks can be fixed to the long edge of the metal cavity 100 by welding, bonding or other means, so that a stepped fixing groove 110 is formed between the two tracks. Of course, the fixing groove 110 can also be set as a dovetail groove structure, which is not limited.

[0063] The matching piece 310 is in the shape of a long strip as a whole, specifically a microstrip line with a meandering structure, so as to transform impedance and reduce the overall length of the matching piece 310. Of course, the matching piece 310 can also be in other shapes, which is not limited.

[0064] Exemplarily, the matching element 310 may also be designed as a microstrip line structure with filtering and impedance transformation functions, so as to enhance the isolation between different frequencies, so as to be more flexibly designed according to the antenna performance indicators.

[0065] During installation, the matching piece 310 only needs to be inserted into the fixing slot 110 from one end thereof, and then the connecting piece 320 is installed to connect the matching piece 310 and the phase shifting plate 200 through the connecting piece 320. Finally, the external coaxial cable 10 or the vibrator is electrically connected to the matching piece 310.

[0066] like Figure 1 and Figure 4 As shown, further, the matching piece 310 is provided with a first wiring block 330 , and the first wiring block 330 is provided with a first connecting groove 331 for clamping the coaxial cable 10 .

[0067] Each matching piece 310 is provided with a first wiring block 330, which can be made of plastic and fixed to one end of the matching piece 310 away from the connecting piece 320. The first connecting groove 331 is provided on a side of the first wiring block 330 away from the metal cavity 100, and the first connecting groove 331 is in a semicircular structure and is arranged obliquely.

[0068] During installation, the coaxial cable 10 is first clamped into the first connection slot 331 on the first wiring block 330, and then the inner conductor of the coaxial cable 10 is welded to the matching piece 310. Thus, the installation of each coaxial cable 10 is positioned by multiple first wiring blocks 330, ensuring that each coaxial cable 10 is fixed in the same or similar state, thereby improving phase consistency.

[0069] During implementation, in order to facilitate locking of the matching member 310 after the matching member 310 is inserted into the fixing slot 110, in this embodiment, the matching member 310 is positioned from both ends of the matching member 310 by the connecting member 320 and the first wiring block 330 respectively.

[0070] Specifically, Figure 4 As shown, for the end where the first wiring block 330 is located, the matching piece 310 is provided with an elastic portion 332 , a positioning protrusion 333 is provided on the elastic portion 332 , and a positioning hole 334 for matching with the positioning protrusion 333 is opened on the outer wall of the metal cavity 100 .

[0071] In this embodiment, the elastic portion 332 may be an arc-shaped elastic sheet, and the elastic portion 332 may be fixed to the first wiring block 330 by welding or other means, and the elastic portion 332 is located on the side of the first wiring block 330 away from the matching member 310. The positioning protrusion 333 is located on the side of the elastic portion 332 facing the metal cavity 100, and the positioning protrusion 333 may be integrally formed with the elastic portion 332, and may also be fixed to the elastic portion 332 by welding or other means.

[0072] Therefore, after the matching piece 310 is inserted into the fixing groove 110, the positioning protrusion 333 on the elastic part 332 will be engaged with the positioning hole 334, thereby locking the first wiring block 330, i.e., the matching piece 310, in the current position, i.e., locking the matching piece 310 in the fixing groove 110, thereby ensuring the stability of the matching piece 310 after installation.

[0073] like Figure 1 As shown, in addition, for one end where the connector 320 is located, the connector 320 includes a pin, which is inserted into the metal cavity 100 and electrically connected to the matching member 310 and the phase shifter 200 at the same time.

[0074] Specifically, a first slot 321 is provided at a position of the metal cavity 100 corresponding to the matching piece 310 , a second slot 322 is provided on the matching piece 310 , and the pin is plugged into the second slot 322 and the first slot 321 at the same time.

[0075] After the matching piece 310 is inserted into the fixing slot 110, the second slot 322 corresponds to the first slot 321, and then the connecting piece 320 can be inserted into the second slot 322 and the first slot 321 in sequence, so that the matching piece 310 is restricted in the fixing slot 110 through the connecting piece 320, and finally the connecting piece 320 can be welded to the matching piece 310 and the phase shifter 200, so as to ensure the stability of the matching piece 310 after installation. In addition, a circuit is provided on the connecting piece 320 to transmit signals. After the connecting piece 320 contacts the matching piece 310 and the phase shifter 200 at the same time, the matching piece 310 is electrically connected to the phase shift network on the phase shifter 200 (for example, the end of the third layer of circuits on the phase shifter 200) through the circuit on the connecting piece 320, so as to ensure the transmission effect of electrical signals between the matching piece 310 and the phase shifter network on the phase shifter 200.

[0076] It should be noted that when the connector 320 is used in a multi-layer metal cavity 100, the pins correspondingly arranged in each layer of the metal cavity 100 can be connected into an integral structure. Figure 5 and Figure 6 When applied to a two-layer metal cavity 100, the two pins respectively plugged into the two metal cavities 100 can be set as an integrated structure to form a "π"-shaped structure, so that the two pins can be installed together to improve the convenience of installation.

[0077] like Figure 1 and Figure 7 As shown, in some embodiments, a plurality of second wiring blocks 400 are disposed on the outer wall of the metal cavity 100 , and the second wiring blocks 400 are provided with second connection grooves 410 .

[0078] In this embodiment, the plurality of fixing grooves 110 can be classified, some of the fixing grooves 110 are used for clamping the matching piece 310, and some of the fixing grooves 110 are used for clamping the second wiring block 400. The second wiring block 400 is provided with a second connection groove 410, which is in a semicircular structure and is located on a side of the second wiring block 400 away from the metal cavity 100.

[0079] When installing the second wiring block 400, it can be firstly clamped in the fixing groove 110 to pre-position the second wiring block 400, and then the second wiring block 400 is welded and fixed to the metal cavity 100, thereby improving the convenience and accuracy of the installation of the second wiring block 400 and improving the installation effect. Then, the cable (such as the coaxial cable 10) can be clamped in the second connection groove 410, and then the cable and the second wiring block 400 are welded, so as to facilitate the connection of the cable with the metal cavity 100 or the phase shifter 200.

[0080] It should be noted that a tin guide groove 420 is also provided on the inner wall of the second connection groove 410 , so that the tin guide groove 420 can limit the flow range of the solder, reduce the possibility of the solder overflowing to an unnecessary area, and ensure the welding effect.

[0081] like Figure 8 As shown, in some embodiments, mounting grooves 120 are disposed at two opposite ends of the metal cavity 100 , and two opposite ends of the phase shifting plate 200 are correspondingly clamped in the two mounting grooves 120 .

[0082] The extending direction of the mounting groove 120 is consistent with the extending direction of the metal cavity 100 , and two opposite long sides of the phase shifting plate 200 are respectively correspondingly engaged with the two mounting grooves 120 .

[0083] Therefore, when installing the phase shifter 200 , it is only necessary to insert the phase shifter 200 into the metal cavity 100 from the end in the extending direction of the metal cavity 100 and simultaneously snap it into the two installation grooves 120 , thereby improving the convenience of installing the phase shifter 200 .

[0084] like Fig. 9 As shown, further, the phase shifting plate 200 includes a plurality of plate units 210 arranged in sequence and a transition piece 220 for electrically connecting two adjacent plate units 210 .

[0085] The plurality of plate units 210 are sequentially arranged along their length direction, and circuits are disposed on each plate unit 210. During installation, each plate unit 210 can be inserted into the metal cavity 100 from both ends of the metal cavity 100 in its extending direction.

[0086] The adapter 220 may be in the form of a sheet, strip, plate or other structure, and may also have circuits on the adapter 220. During installation, the adapter 220 may be welded to two adjacent plate units 210 at the same time, so that each plate unit 210 is connected to form a phase shifting plate 200 as a whole, and the circuits on each plate unit 210 are electrically connected to each other through the circuits on the adapter 220, so as to construct a complete phase shifting network.

[0087] Thus, the entire phase shift plate 200 that needs to be processed can be divided into multiple plate units 210 for processing, which reduces the processing difficulty and improves the process quality and mass production performance. In this regard, the problem that the PCB board or metal strip line of the phase shift network is too long and difficult to process is solved, and the metal cavity 100 does not need or only needs to be partially electroplated.

[0088] During implementation, good electrical performance can be achieved by adjusting the line impedance on the board unit 210 and the line impedance on the adapter 220, and the structure is stable without introducing additional losses. The board unit 210 can be in the form of a PCB or a metal strip line. The adapter 220 is preferably a direct electrical connection in the form of a PCB, or an electrical coupling connection in the form of a PCB or a metal strip line. In summary, the phase shifter provided in the embodiment of the present application sets at least part of the output interface 300 (such as the matching member 310) outside the metal cavity 100, thereby reducing the occupation of the internal space of the metal cavity 100, and can reduce the required width of the metal cavity 100, so that the metal cavity 100 has a higher resonance point, so that the metal cavity 100 can be designed to a higher frequency; and the phase shifter can also use a medium with a larger dielectric constant, shorten the phase shifter stroke, and is conducive to reducing the length of the phase shifter, solving the problem that the width of the metal cavity 100 in the prior art is large, making it difficult to design the phase shifter to a higher frequency, thereby resulting in poor use of the phase shifter.

[0089] An embodiment of the present application also provides a base station antenna, including an input feeder, a plurality of vibrators and a phase shifter in any of the above embodiments, wherein the input feeder is electrically connected to a phase shifter plate 200 in the phase shifter, and each vibrator is electrically connected to each matching component 310 or phase shifter plate 200 in the phase shifter.

[0090] Specifically, the base station antenna includes an input feeder, a phase shifter, a vibrator, a reflector, a transmission structure and a radome.

[0091] The phase shifter is the phase shifter in any of the above embodiments, and the specific structure has been described in detail in the above embodiments, which will not be repeated here.

[0092] For the input feeder, vibrator, reflector, transmission structure and antenna cover, the existing structure can be adopted, and there is no limitation on this, and it is not shown in the attached figure. Among them, the transmission structure is used to change the phase shifting structure of the phase shifter to change the phase difference of the signal reaching each vibrator, that is, to adjust the downtilt angle of the antenna beam and adjust the signal coverage range. The reflector can reflect the radiation energy generated by the antenna, thereby enhancing the strength of the signal, helping to improve the gain of the antenna and making the signal coverage range wider. The antenna cover can protect each component and improve the overall safety performance of the antenna.

[0093] It should be noted that, for example, in some embodiments, the vibrator can be electrically connected to the matching element 310 in the phase shifter. In other embodiments, when the output interface 300 on the phase shift plate 200 is 75 ohms, the matching element 310 is not required, and the connector 320 or the phase shift plate 200 can be directly connected to the vibrator or connected to the vibrator through a 75 ohm line.

[0094] A base station antenna provided in an embodiment of the present application has a metal cavity 100 in a phase shifter with a higher resonance point, thereby increasing the resonance frequency of the metal cavity 100 so that the phase shifter can be designed to have a higher operating frequency, thereby supporting the antenna to have good electrical adjustment performance in a higher frequency band and optimizing the antenna performance.

[0095] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A phase shifter, characterized in that: include: At least one body, the body comprising: A metal cavity (100), wherein the interior of the metal cavity (100) is hollow; A phase shift plate (200), the phase shift plate (200) being installed in the metal cavity (100); A plurality of output interfaces (300), the output interfaces (300) comprising a matching piece (310) and a connecting piece (320), each of the matching pieces (310) being arranged outside the metal cavity (100), the matching piece (310) being electrically connected to the phase shift plate (200) via the connecting piece (320), and the matching piece (310) being used to connect a coaxial cable (10).

2. The phase shifter according to claim 1, characterized in that: The outer surface of the metal cavity (100) is provided with a plurality of fixing grooves (110), and the matching piece (310) is inserted into the fixing grooves (110).

3. The phase shifter according to claim 2, characterized in that: The matching piece (310) is provided with a first wiring block (330), and the first wiring block (330) is provided with a first connection groove (331) for clamping the coaxial cable (10).

4. The phase shifter according to claim 2, characterized in that: The matching piece (310) is provided with an elastic part (332), a positioning protrusion (333) is provided on the elastic part (332), and a positioning hole (334) for matching with the positioning protrusion (333) is provided on the outer wall of the metal cavity (100).

5. The phase shifter according to claim 2, characterized in that: The connecting member (320) comprises a plug pin, the plug pin is inserted into the metal cavity (100), and the plug pin is electrically connected to the matching member (310) and the phase shift plate (200) at the same time.

6. The phase shifter according to claim 5, characterized in that A first slot (321) is provided on the metal cavity (100) at a position corresponding to the matching piece (310), a second slot (322) is provided on the matching piece (310), and the insertion pin is simultaneously plugged into the second slot (322) and the first slot (321).

7. The phase shifter according to any one of claims 1 to 6, characterized in that: The outer wall of the metal cavity (100) is provided with a plurality of second wiring blocks (400), and the second wiring blocks (400) are provided with second connection grooves (410).

8. The phase shifter according to any one of claims 1 to 6, characterized in that: Mounting grooves (120) are provided at two opposite ends in the metal cavity (100), and the two opposite ends of the phase shifting plate (200) are respectively and correspondingly clamped in the two mounting grooves (120).

9. The phase shifter according to any one of claims 1 to 6, characterized in that: The phase shifting plate (200) comprises a plurality of plate body units (210) arranged in sequence and a transition piece (220) for electrically connecting two adjacent plate body units (210).

10. A base station antenna, characterized in that: The invention comprises an input feeder, a plurality of vibrators and the phase shifter according to any one of claims 1 to 9, wherein the input feeder is electrically connected to a phase shifting plate (200) in the phase shifter, and each of the vibrators is electrically connected to a matching component (310) or a phase shifting plate (200) in the phase shifter.

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