阅读说明：本技术 一种可调式移相器 (Adjustable phase shifter ) 是由 吴维检 张湛明 张浩喻 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种可调式移相器,包括：固定板、滑动板和壳体；固定板上包括至少两条平行的第一微带线；滑动板的第一侧包括通过连接微带线电连接的至少两条平行的第二微带线,滑动板的第二侧的一边包括至少两个凸起的块体,壳体在与滑动板上至少两个凸起的块体对应的位置设置有至少两个对应的调节螺纹孔,壳体在与滑动板其他对应的位置设置有至少一个对应的固定螺纹孔,壳体在与滑动板上至少两条平行的第二微带线未连接的一侧对应的位置设置有移相连接器,调节螺纹孔中包括接触凸起的块体的调节螺钉,固定螺纹孔中包括固定滑动板的第二侧的固定螺钉。本发明实施例公开的可调式移相器,提高了移相器的相位调节精度。(The invention discloses an adjustable phase shifter, comprising: a fixed plate, a sliding plate and a housing; the fixing plate comprises at least two parallel first microstrip lines; the first side of the sliding plate comprises at least two parallel second microstrip lines which are electrically connected through the connecting microstrip lines, one side of the second side of the sliding plate comprises at least two convex block bodies, the shell is provided with at least two corresponding adjusting threaded holes at positions corresponding to the at least two convex block bodies on the sliding plate, the shell is provided with at least one corresponding fixed threaded hole at positions corresponding to other sliding plate bodies, the shell is provided with a phase-shifting connector at a position corresponding to one side of the sliding plate which is not connected with the at least two parallel second microstrip lines, the adjusting threaded holes comprise adjusting screws which are in contact with the convex block bodies, and the fixed threaded holes comprise fixing screws which are used for fixing the second side of the sliding plate. The adjustable phase shifter disclosed by the embodiment of the invention improves the phase adjusting precision of the phase shifter.)

1. A tunable phase shifter, comprising: a fixed plate, a sliding plate and a housing;

the fixed plate comprises at least two parallel first microstrip lines;

the first side of the sliding plate comprises at least two parallel second microstrip lines, one ends of the at least two parallel second microstrip lines are electrically connected through connecting microstrip lines, the at least two parallel second microstrip lines and the at least two parallel first microstrip lines have the same size and the same interval, one side of the second side of the sliding plate comprises at least two convex block bodies, the sliding plate is slidably placed on the fixed plate, and the at least two parallel second microstrip lines are overlapped with the at least two parallel first microstrip lines;

the casing comprises a sinking cavity capable of accommodating the fixed plate and a sliding plate placed on the fixed plate, at least two corresponding adjusting threaded holes are formed in the positions of the casing corresponding to at least two convex block bodies on the sliding plate, at least one corresponding fixing threaded hole is formed in the positions of the casing corresponding to other positions of the sliding plate, a phase-shifting connector is arranged at the position of the casing corresponding to one side of the sliding plate, which is not connected with at least two parallel second microstrip lines, the adjusting threaded holes comprise adjusting screws contacting with the convex block bodies, and the fixing threaded holes comprise fixing screws fixing the second side of the sliding plate.

2. The adjustable phase shifter of claim 1, wherein the adjustment screw is a tapered screw comprising a threaded body and a tapered head.

3. The adjustable phase shifter of claim 1, wherein the submerged cavity comprises a cavity and a step having a size larger than the cavity, and an inner size of the step is the same as an outer size of the fixed plate.

4. The adjustable phase shifter of claim 3, wherein the submerged chamber is provided with at least two corresponding block-receiving chambers at positions corresponding to at least two raised blocks on the sliding plate.

5. The adjustable phase shifter according to claim 3 or 4, wherein the submerged cavity is provided with at least two raised ribs inside the cavity on the adjustment screw hole side.

6. The adjustable phase shifter according to any one of claims 1 to 4, further comprising a frame, wherein the frame is fixedly mounted on the fixing plate, the frame includes an accommodating cavity for accommodating the housing therein, the frame is provided with a long hole for accommodating a screw at a position corresponding to at least two adjusting threaded holes and at least one fixing threaded hole, and a length direction of the long hole is parallel to the at least two parallel first microstrip lines.

7. The adjustable phase shifter according to claim 6, wherein the length of the screw-receiving elongated hole is smaller than the length of the at least two parallel first microstrip lines.

8. The adjustable phase shifter of claim 6, wherein the size of the receiving cavity in the housing is larger than the size of the housing.

9. The adjustable phase shifter according to any one of claims 1 to 4, wherein the second side of the sliding plate further comprises a fixedly mounted buffer pad, the size of the buffer pad is smaller than or equal to the size of the sliding plate, and the buffer pad does not cover the at least two raised blocks.

10. The adjustable phase shifter of claim 9, further comprising a pressure plate above the cushion pad, the size of the pressure plate being smaller than or equal to the size of the cushion pad.

Technical Field

The embodiment of the invention relates to a microwave technology, in particular to an adjustable phase shifter.

Background

A phase shifter is a device capable of adjusting a signal transmission phase, and is widely used in various microwave systems. In particular, in the array antenna, since the array antenna includes a plurality of radiation elements, in order to perform beamforming on the array antenna, it is necessary to accurately control the phases of signals transmitted and received by the respective radiation elements.

The phase shifter is divided into an analog phase shifter and a digital phase shifter, wherein the digital phase shifter is controlled more accurately but can only realize discontinuous phase adjustment, and the analog phase shifter realizes continuous phase adjustment of signals by adjusting the physical length of a signal transmission line. In the current fifth Generation mobile communication (5th Generation, 5G) wireless products, large-scale array antennas have been widely used. The number of radiating elements in the large-scale array antenna is large, in order to reduce cost and power consumption, a plurality of radiating elements need to share one transceiver unit, and in order to realize beam forming of the antenna array, an analog phase shifter needs to be adopted in the large-scale array antenna for beam forming adjustment.

The existing analog phase shifters are usually machined and manually installed in the array antenna, and due to the fact that the number of the phase shifters is large, it is difficult to ensure the installation accuracy of each phase shifter in the assembling process, so that each phase shifter is difficult to provide the same phase output, and accurate beam forming of a large-scale array antenna may be affected.

Disclosure of Invention

The invention provides an adjustable phase shifter, which improves the phase adjusting precision of the phase shifter.

In a first aspect, an embodiment of the present invention provides a tunable phase shifter, including: a fixed plate, a sliding plate and a housing;

the fixing plate comprises at least two parallel first microstrip lines;

the first side of the sliding plate comprises at least two parallel second microstrip lines, one ends of the at least two parallel second microstrip lines are electrically connected through a connecting microstrip line, the at least two parallel second microstrip lines and the at least two parallel first microstrip lines have the same size and the same interval, one side of the second side of the sliding plate comprises at least two convex block bodies, the sliding plate is slidably placed on the fixed plate, and the at least two parallel second microstrip lines are superposed with the at least two parallel first microstrip lines;

the casing can hold the fixed plate and place the sunken chamber of sliding plate on the fixed plate including holding, the casing is provided with two at least regulation screw holes that correspond with the position that two at least bellied blocks on the sliding plate correspond, the casing is provided with at least one corresponding fixed screw hole in the position that corresponds with other positions that correspond of sliding plate, the casing is provided with the connector of shifting the phase in the position that corresponds with the one side that two at least parallel second microstrip lines on the sliding plate are not connected, adjust the adjusting screw hole including the adjusting screw who contacts bellied block, including the fixing screw of the second side of fixed sliding plate in the fixed screw hole.

In a possible implementation form of the first aspect, the adjusting screw is a conical screw, and the conical screw comprises a threaded main body and a conical head.

In a possible implementation manner of the first aspect, the sinking cavity comprises a cavity and a step with a size larger than that of the cavity, and an inner size of the step is the same as an outer size of the fixing plate.

In a possible implementation of the first aspect, the submerged chamber is provided with at least two corresponding block receiving chambers in positions corresponding to at least two raised blocks on the sliding plate.

In a possible implementation manner of the first aspect, the sinking cavity is provided with at least two raised ribs inside the cavity body on the opposite side of the adjusting threaded hole.

In a possible implementation manner of the first aspect, the microstrip line connector further includes a frame, the frame is fixedly mounted on the fixing plate, the frame includes an accommodating cavity capable of accommodating the housing, the frame is provided with a long hole for accommodating the screw at a position corresponding to the at least two adjusting threaded holes and the at least one fixing threaded hole, and a length direction of the long hole is parallel to the at least two parallel first microstrip lines.

In a possible implementation manner of the first aspect, the length of the long hole for accommodating the screw is smaller than the length of the at least two parallel first microstrip lines.

In a possible implementation manner of the first aspect, the size of the accommodating cavity in the housing is larger than that of the housing.

In a possible implementation manner of the first aspect, the second side of the sliding plate further comprises a fixedly mounted cushion, the size of the cushion is smaller than or equal to the size of the sliding plate, and the cushion does not cover the at least two raised blocks.

In a possible implementation manner of the first aspect, the cushion pad further includes a pressure plate above the cushion pad, and the size of the pressure plate is smaller than or equal to the size of the cushion pad.

The adjustable phase shifter provided by the embodiment of the invention comprises a fixed plate, a sliding plate and a shell, wherein the sliding plate is provided with a raised block body, and the shell is provided with an adjusting threaded hole and a fixed threaded hole which correspond to the raised block body, so that the adjustable phase shifter can realize the position adjustment of the sliding plate through adjusting an adjusting screw in the threaded hole, and the aim of adjusting the performance of the phase shifter can be achieved. The adjustable phase shifter provided by the embodiment of the invention provides an accurate, simple, high-efficiency and multi-dimensional adjusting mode; in addition, the phase can be fixed only by once debugging in the assembly process, and the adjusting efficiency is high; after debugging, the adjustable phase shifter provided by the embodiment of the invention can be used as an independent component to be welded on an antenna, and the debugging result can be maintained in a device with a service life, so that the reliability is higher.

Drawings

FIG. 1 is a schematic diagram of a large scale array;

FIG. 2 is a schematic diagram of another large-scale array;

fig. 3A to 3C are schematic views of a conventional phase shifter structure used in an array antenna;

FIGS. 4A and 4B are schematic diagrams illustrating a misassembly of a phase shifter;

FIGS. 5A-5G are schematic structural diagrams of a tunable phase shifter according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an adjusting screw in an adjustable phase shifter according to an embodiment of the present invention;

FIGS. 7A and 7B are schematic structural diagrams of another adjustable phase shifter according to an embodiment of the present invention;

fig. 8A-8C are schematic cross-sectional views of a tunable phase shifter according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the current fifth Generation mobile communication (5th Generation, 5G) wireless products, a large-scale array antenna is generally used. A5G antenna array is composed of a plurality of radiation units, and radiation beams of the radiation units are combined into a beam required by the antenna array.

In order to implement beamforming in the antenna array, each radiation element needs to be beam-controlled. When the size of the antenna array is large, configuring an independent transceiver unit for each radiating unit to perform beam control would result in a large number of transceiver units, which would result in a significant increase in the cost, weight, volume, and power consumption of the antenna array, and is obviously impractical. Therefore, most of the existing large-scale array antennas use one transceiver unit to simultaneously connect a plurality of radiation units, and through the control of the transceiver unit, each radiation unit can realize different beamforming. However, in the current array antenna, the number of the transceiver units is still large, which results in high cost and power consumption of the array antenna.

Fig. 1 is a schematic structural diagram of a large-scale array, and in fig. 1, an antenna array includes 192 radiation elements as an example, where 96 dual-polarized radiation elements, which are equivalent to 192 radiation elements, are shown in the figure. Every 3 radiation units with the same polarization share a feed network of 1 minute and 3 minutes and 1 port, and each port is associated with a transceiver unit, namely an antenna array consisting of 192 radiation units is connected with 64 transceiver units. During beamforming, the transceiver unit adjusts the phase and amplitude of each port. The number of the receiving and sending units determines the range and flexibility of beam forming, and influences the effect of beam forming.

However, reducing the number of transceiver units also means reducing costs and product power consumption. Therefore, increasing attention is paid to how to reduce the number of transceiver units of the wireless device and ensure the flexibility of beamforming. One solution to the cost and power consumption of array antennas is to reduce the number of transceiver units. Fig. 2 is a schematic structural diagram of another large-scale array, and the large-scale array antenna shown in fig. 2 is based on the array antenna shown in fig. 1, and 32 transceiver units are used instead of 64 transceiver units, so that the cost and power consumption are reduced to half of the original cost and power consumption. In fig. 2, in order to use 32 transceiver elements instead of 64 transceiver elements, every 6 co-polarized radiating elements share one port and 1 transceiver element control. This means that the number of transceiver units per column is reduced from 4 to two, and each row still contains 8 transceiver units. This design limits the range and flexibility of beam scanning in the vertical direction due to the reduced number of transceiver units.

Thus, in fig. 2, integrated phase shifters are needed to solve the above problem, and these phase shifters are controlled by special networks and mechanical structures to help achieve the desired beam scanning angle in the vertical direction. The biggest challenge of the structure is how to ensure the consistency of a plurality of phase shifters, and the phase shifters with poor consistency can cause the problems of antenna gain loss, high side lobes, poor scanning range and the like. The phase shifter is required to provide the same phase and amplitude output after assembly to the antenna.

Fig. 3A to 3C are schematic views of a conventional phase shifter structure used in an array antenna, wherein fig. 3A is a schematic view of a conventional phase shifter structure, and the phase shifter is composed of two different Printed Circuit Boards (PCBs) having Microstrip lines (MSLs). The PCB 31 includes a microstrip line 32 in a U shape, and the PCB 33 includes two parallel microstrip lines 34 and 35. The PCB 33 is fixed and the microstrip line 34 includes an input 36 and a first output 37 and the microstrip line 35 includes a second output 38. The two arms of the microstrip line 32 are parallel and have the same distance with the microstrip line 34 and the microstrip line 35. The PCB 31 covers the PCB 33, so that two arms of the microstrip line 32 are completely overlapped and contacted with the microstrip line 34 and the microstrip line 35, and the phases from the input end 35 to the first output end 37 and the second output end 38 can be changed by sliding the PCB 31 in a direction parallel to the microstrip line 34 and the microstrip line 35, thereby achieving the phase shifting effect. The normal operation of the phase shifter is shown in fig. 3B and 3C. In the array antenna shown in fig. 2, 32 transceiver units are connected to 32 phase shifters, respectively, and all the phase shifters are driven by one motor and identical structural parts.

However, since the phase shifter shown in fig. 3A requires manual assembly, a phase error or impedance mismatch of the phase shifter may be caused due to an assembly error. FIGS. 4A and 4B are schematic diagrams illustrating a misassembly of a phase shifter; as shown in fig. 4A and 4B, the two arms of the microstrip line 32 in fig. 4A are misaligned with the microstrip line 34 and the microstrip line 35, which causes impedance mismatch. The two arms of the microstrip line 32 in fig. 4B are not parallel to the microstrip line 34 and the microstrip line 35, which will cause phase error and impedance mismatch.

Fig. 5A to 5G are schematic structural views of a tunable phase shifter according to an embodiment of the present invention, as shown in fig. 5A to 5F, the tunable phase shifter according to the embodiment includes: a fixed plate 51, a sliding plate 52 and a housing 53. Fig. 5A is an exploded view of an assembly of an adjustable phase shifter, fig. 5B is a schematic diagram of a fixed plate structure, fig. 5C is a schematic diagram of a first side of a sliding plate, fig. 5D is a schematic diagram of a second side of the sliding plate, fig. 5E is a schematic diagram of an outer side of a housing, and fig. 5F and 5G are schematic diagrams of an inner side of the housing.

The fixed board 51 includes at least two parallel first microstrip lines 511, and in fig. 5B, two parallel first microstrip lines 54 are taken as an example. The fixed board 51 and the two parallel first microstrip lines 511 are the same as the PCB 31 shown in fig. 3A.

The first side of the sliding plate 52 comprises at least two parallel second microstrip lines 521, which are exemplified by the two parallel second microstrip lines 521 in fig. 5C. One end of the two parallel second microstrip lines 521 is electrically connected through the connecting microstrip line 522, and the two parallel second microstrip lines 521 and the connecting microstrip line 522 form a U-shaped microstrip line. The two parallel second microstrip lines 521 have the same size and the same distance with the two parallel first microstrip lines 511. One edge of the second side of the slide plate 52 comprises at least two convex blocks 523, in fig. 5D for example two convex blocks 523. The sliding plate 52 is slidably disposed on the fixed plate 51, and the two parallel second microstrip lines 521 are overlapped with the two parallel first microstrip lines 511. One of the two first microstrip lines 511 on the fixed plate 51 may serve as a signal input terminal of the phase shifter, and the other may serve as a signal output terminal of the phase shifter. The raised blocks 523 may be secured to the slide plate 52 by welding or by screws.

The fixed plate 51 and the sliding plate 52 may be made of polymer or made of PCB. The first microstrip line 511 and the second microstrip line 521 may be fixed on the fixed plate 51 or the sliding plate 52 by printing or plating.

Since the sliding plate 52 is manually assembled with the fixed plate 51, it is difficult to ensure that the two parallel second microstrip lines 521 are overlapped with the two parallel first microstrip lines 511, and therefore, in this embodiment, a housing 53 is further provided, and a structure for adjusting and positioning the assembling position of the sliding plate 52 is provided by the cooperation of the housing 53 and the sliding plate 52, so that the uniformity of the phase can be ensured throughout the phase shifter.

The housing 53 includes a submerged chamber 531 for accommodating the fixed plate 51 and the sliding plate 52 placed on the fixed plate 51, the housing 53 is provided with at least two corresponding adjusting threaded holes 532 at positions corresponding to the at least two convex blocks 523 of the sliding plate 52, and the housing 53 is provided with at least one corresponding fixed threaded hole 533 at positions corresponding to the other sliding plates 52. In the present embodiment, two adjusting threaded holes 532 and one fixing threaded hole 533 are taken as an example. The casing 53 is provided with a phase-shift connector 534 at a position corresponding to the unconnected side of the two parallel second microstrip lines 521 on the sliding plate 52, the adjusting screw hole 532 includes an adjusting screw 535 contacting the convex block 523, and the fixing screw hole 533 includes a fixing screw 536 fixing the second side of the sliding plate 52.

In the phase shifter of the present embodiment, the fixed plate 51 is the same as the PCB 31 shown in fig. 3A, the first side of the sliding plate 52 is the same as the PCB 32 shown in fig. 3A, but one edge of the second side of the sliding plate 52 is provided with two convex blocks 523. And the fixed plate 51 and the sliding plate 52 are provided with the housing 53 for accommodating the fixed plate 51 and the sliding plate 52, and the housing 53 is provided with the adjusting threaded hole 532 at the corresponding position of the convex block 523, so after the adjusting threaded hole 532 is screwed with the adjusting screw 535, the adjusting screw 535 will contact with the convex block 523 with the depth of the adjusting screw 535, and will press the convex block 523. The position of the adjusting screw hole 532 is slightly deviated from the arrangement of the convex block 523, the adjusting screw 535 contacting the convex block 523 forces the sliding plate 52 to move in the direction perpendicular to the first microstrip line 511, so that the purpose of adjusting the position of the sliding plate 52 in the transverse direction can be achieved. Since at least two adjustment screw holes 532 are provided on the housing 53, different positions of the sliding plate 52 can be laterally moved by adjusting the adjustment screws 535 in the two adjustment screw holes 532. After the position of the sliding plate 52 is adjusted by the adjusting screw 535, the sliding plate 52 can be fixed by the fixing screw 536, so that the position of the sliding plate 52 is fixed, and when the housing 53 is moved in a direction parallel to the first microstrip line 511, the sliding plate 52 will also be simultaneously driven to move in a direction parallel to the first microstrip line 511, that is, the two second microstrip lines 521 will slide on the two first microstrip lines 511. Thus, the position adjustment of the phase shifter is completed, and the two second microstrip lines 521 on the sliding plate 52 and the two first microstrip lines on the fixed plate 51 of the phase shifter with the completed position adjustment can be overlapped, so that the phase shift value of the phase shifter can meet the design requirement.

Since the adjustable phase shifter provided in this embodiment is a mechanical phase shifter, the phase-shift connector 534 needs to be disposed on the housing 53, the phase-shift connector 534 is used for being connected to a driving device for driving the adjustable phase shifter, and the housing 53 is driven by the driving device to move in a direction parallel to the first microstrip line 511, so that the housing 53 drives the sliding plate 52 to move in a direction parallel to the first microstrip line 511, that is, the second microstrip line 521 moves in a direction parallel to the first microstrip line 511, thereby changing a total transmission distance between the signal input end and the signal output end, and implementing phase adjustment of the phase shifter.

It should be noted that, when the phase shifter is adjusted by the adjusting screw 535, a measuring instrument may be connected between the input end and the output end of the phase shifter to test the parameters of the phase shifter, so as to adjust the screw 535 according to the test data, thereby implementing the adjustment of the phase shifter.

In order to enable the adjusting screw 535 to better adjust the position of the sliding plate 52, the adjusting screw 535 may be a conical screw, fig. 6 is a schematic structural diagram of an adjusting screw in an adjustable phase shifter according to an embodiment of the present invention, and as shown in fig. 6, the adjusting screw is a conical screw and includes a threaded main body 61 and a conical head 62. After the adjusting screw 535 is set as a taper screw, since the taper screw includes the taper head 62, as the adjusting screw 535 is screwed into the adjusting screw hole 532, the taper head 62 will gradually press the convex block 523, and the sliding plate 52 will gradually move to a side away from the adjusting screw hole 532, thereby adjusting the position of the sliding plate 52.

Further, the sinking chamber 531 of the housing 53 includes a chamber 537 and a step 538 having a size larger than that of the chamber, and the inner size of the step 538 is the same as the outer size of the fixed plate 51. As shown in fig. 5F and 5G, steps 538 may be located on both sides of the sink cavity 531. The height of the step 538 is the same as or slightly smaller than the thickness of the fixed plate 51, and the inner diameter of the rectangular frame formed by the step 538 is the same as the outer diameter of the fixed plate 51, so that after the housing 53 is covered on the fixed plate 51 and the sliding plate 52, the fixed plate 51 is embedded in the rectangular frame formed by the step 538 and can move in a direction parallel to the first microstrip line 511. Cavity 537 of submerged chamber 531 is adapted to receive sliding plate 52.

Further, the sinking chamber 531 of the housing 53 is provided with at least two corresponding block receiving chambers 539 at positions corresponding to the at least two convex blocks 523 on the sliding plate 52. Since the two convex blocks 523 are required to make the sliding plate 52 move laterally under the pressing of the adjustment screw 535, the block receiving cavity 539 is provided to receive the convex blocks 523 and to enable the movement of the convex blocks 523. The block receiving cavities 539 need to be larger in duration than the size of the raised blocks 523 and may be the same shape.

Further, the sink cavity 531 of the housing 53 is provided with at least two raised ribs 530 on the inside of the cavity 537 opposite the adjusting threaded hole 532. For ease of assembly, the inner dimension of the chamber body of the submerged chamber 531 needs to be slightly larger than the outer dimension of the sliding plate 52, but in order to enable the sliding plate 52 to be firmly fixed in the housing 52, at least two raised ribs 530 may be provided inside the chamber body 537, two ribs 530 being exemplified in the figure. The provision of the rib 530 allows the lateral position of the slide plate 52 to be restricted, facilitating the positioning of the slide plate 52.

Optionally, the second side of the slide plate 52 further comprises a fixedly mounted cushion 524, the size of the cushion 524 being smaller than or equal to the size of the slide plate 52, and the cushion 524 not covering the at least two raised blocks 523. Since the sliding plate 52 is generally a rigid plate, in order to enable the housing 53 to move the sliding plate 52 after the fixing screw 536 is fixed to the sliding plate 52, a buffer 524 may be disposed on the sliding plate 52, and the buffer 524 may increase the friction force of the fixing screw 536, which is further beneficial for the housing 53 to move the sliding plate 52. Cushion 524 may be rubber and may be adhered to the second side of plate 52.

Optionally, a pressure plate 55 is further included above the cushioning pad 524, the size of the pressure plate 55 being smaller than or equal to the size of the cushioning pad 524. In order to further increase the friction between the housing 53 and the sliding plate 52 after being fixed by the fixing screws 536, a layer of pressure plate 55 may be further added to the cushion 524, and the pressure plate 55 is a rigid plate. After the pressure plate 55 is disposed and the fixing screws 536 are fastened, the fastening screws 536 actually press the pressure plate 55, the pressure plate 55 further presses the cushion pad 524, since the cushion pad 524 is made of a flexible material, a large friction force exists between the pressed pressure plate 55 and the cushion pad 524, and the cushion pad 524 is fixed to the sliding plate 52, so that the sliding plate 52 can be well driven by the housing 53 to slide.

Fig. 7A and 7B are schematic structural views of another adjustable phase shifter according to an embodiment of the present invention, as shown in fig. 7, the adjustable phase shifter according to the embodiment further includes, on the basis of fig. 5A to 5G: and a frame body 54. Fig. 7A is an exploded view of an assembled adjustable phase shifter, and fig. 7B is a schematic diagram of a frame structure.

The frame 54 is fixedly mounted on the fixing plate 51, the frame 54 includes an accommodating cavity 541 capable of accommodating the housing 53, the frame 54 is provided with a long hole 542 for accommodating screws at a position corresponding to the at least two adjusting screw holes 532 and the at least one fixing screw hole 533, and a length direction of the long hole 542 is parallel to the at least two parallel first microstrip lines 511.

The frame 54 may be made of any material, and preferably, the frame 54 is made of a metal material, so as to provide an effect of shielding electromagnetic signal interference to other structures accommodated therein. Frame 54 is fixed to fixed plate 51 by welding or screwing. The slide plate 52 and the housing 53 are both located in the accommodation chamber 541. The size of the accommodating chamber 541 may be larger than that of the housing 53, so that the housing 53 may slide the sliding plate 52 in the accommodating chamber 541. Since the housing 53 has the adjusting screw 535 and the fixing screw 536, and the housing 53 needs to drive the sliding plate 52 to move in a direction parallel to the first microstrip line 511, a plurality of long holes 542 are provided in the frame 54, corresponding to the adjusting screw hole 532 and the fixing screw hole 533 respectively, and have a certain length in a direction parallel to the first microstrip line 511, so that the adjusting screw 535 and the fixing screw 536 can move in the long holes 542.

Further, the length of the long hole 542 accommodating the screw is smaller than the length of the at least two parallel first microstrip lines 511. The length of the long hole 542 can be set according to the phase shift requirement of the adjustable phase shifter, and the length of the long hole 542 is required to be smaller than the length of the at least two parallel first microstrip lines 511, so that the first microstrip line 511 and the second microstrip line 522 can be ensured to be always in contact.

In addition, after the position of the sliding plate 52 is accurately adjusted by the adjusting screw 535 and the sliding plate 52 is fixed by the fixing screw 536, the adjusting screw 535 and the fixing screw 536 may be fixed by using glue or a fastening varnish to ensure that various devices of the adjustable phase shifter always maintain a desired phase.

Fig. 8A-8C are schematic cross-sectional views of a tunable phase shifter according to an embodiment of the present invention. The structural relationship of the structures in the above embodiments in the tunable phase shifter can be seen from fig. 8A to fig. 8C, and the specific relationship of the structures has been described in detail in the above embodiments, and is not repeated here.

The adjustable phase shifter provided by the embodiment of the invention comprises a fixed plate, a sliding plate and a shell, wherein the sliding plate is provided with a raised block body, and the shell is provided with an adjusting threaded hole and a fixed threaded hole which correspond to the raised block body, so that the adjustable phase shifter can realize the position adjustment of the sliding plate through adjusting an adjusting screw in the threaded hole, and the aim of adjusting the performance of the phase shifter can be achieved. The adjustable phase shifter provided by the embodiment of the invention provides an accurate, simple, high-efficiency and multi-dimensional adjusting mode; in addition, the phase can be fixed only by once debugging in the assembly process, and the adjusting efficiency is high; after debugging, the adjustable phase shifter provided by the embodiment of the invention can be used as an independent component to be welded on an antenna, and the debugging result can be maintained in a device with a service life, so that the reliability is higher.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.