Microstrip phase shifter

Abstract

The present invention discloses a microstrip phase shifter, comprising: a first substrate, the first substrate comprising a first surface and a second surface facing each other, the first surface being provided with a metal layer, the second surface being provided with a first feeder and a second feeder arranged in parallel; a movable assembly, the movable assembly being movably disposed on the first substrate, the movable feeder being provided on the movable assembly, the movable feeder comprising a first feeder portion, a second feeder portion, and a connecting portion connecting the first feeder portion and the second feeder portion, the first feeder portion being movably stacked on the first feeder portion, and the second feeder portion being movably stacked on the second feeder portion; a cover, the cover being detachably disposed on the first substrate, the movable assembly being disposed between the cover and the first substrate. The present invention has the advantages of small size, light weight, and low cost.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a microstrip phase shifter. Background Art

[0002] With the development of communication technology, people's demand for communication quality is getting higher and higher. The new generation of 5G mobile communication technology widely adopts MIMO (Massive Multiple Input Multiple Output) array antennas. The number of antenna ports far exceeds that of 4G antennas. If each port is electrically adjustable, then an antenna requires a large number of phase shifters to change the phase. The design of the phase shifter is particularly critical. The phase shifter must be low-cost and miniaturized while ensuring good performance. The existing technology generally uses cavity phase shifters. Cavity phase shifters enclose the circuit in a metal cavity to form a stripline. The phase is changed by moving the medium or moving the metal slider. The metal cavity makes the cavity phase shifter heavier and larger, making it unsuitable for multi-port array antennas. Summary of the Invention

[0003] The main purpose of the present invention is to provide a microstrip phase shifter, aiming to solve the problem that the cavity phase shifter in the prior art is heavy and bulky and is not suitable for multi-port array antennas.

[0004] To achieve the above objectives, the present invention provides a microstrip phase shifter, comprising: a first substrate, the first substrate comprising a first surface and a second surface opposite to each other, the first surface being provided with a metal ground layer, and the second surface being provided with a first feeder and a second feeder arranged in parallel; a movable assembly, the movable assembly being movably disposed on the first substrate, the movable feeder being disposed on the movable assembly, the movable feeder comprising a first feeder, a second feeder, and a connecting portion connecting the first feeder and the second feeder, the first feeder being movably superimposed on the first feeder, and the second feeder being movably superimposed on the second feeder; and a cover, the cover being detachably disposed on the first substrate, the movable assembly being disposed between the cover and the first substrate.

[0005] Furthermore, the first feeder has a first end and a second end that are far away from each other, the second feeder has a third end and a fourth end that are far away from each other, one of the first end, the second end, the third end and the fourth end serves as a signal input end, and at least one of the first end, the second end, the third end and the fourth end whose phase changes serves as a signal output end.

[0006] Furthermore, the moving component includes: a second substrate, the moving feeder is arranged on the surface of the second substrate facing the first feeder and the second feeder; an elastic member, the elastic member is arranged on the surface of the second substrate facing away from the moving feeder, and the elastic member is provided with an elastic protrusion protruding toward the second substrate; a moving member, the moving member includes a moving plate covering the second substrate and the elastic member and a first guide column provided on the moving plate, a first long groove is opened on the first substrate, the first guide column passes through the elastic member and the second substrate in sequence and can move in the first long groove.

[0007] Furthermore, an insulating medium is provided on the first feeder and the second feeder, and / or an insulating medium is provided on the movable feeder.

[0008] Furthermore, the movable part also includes: a second guide post, which is arranged on the surface of the movable plate away from the first guide post, and a second long groove is opened on the cover shell, and the second guide post extends out of the cover shell through the second long groove; the microstrip phase shifter also includes a pull rod, which is connected to one end of the second guide post extending out of the second long groove.

[0009] Furthermore, it also includes: a pull rod, and the movable plate is also provided with a connecting column fixedly connected to the pull rod, the connecting column is set at either end of the moving direction of the movable part, and the end of the movable plate provided with the connecting column extends out of the cover shell.

[0010] Furthermore, the movable part also includes: a plurality of limit blocks, the plurality of limit blocks are protruding on the surface of the movable plate facing the first substrate, and the second substrate and the elastic part are limited between the limit blocks; and / or, the movable part also includes: a plurality of friction bosses, the friction bosses are arranged on the surface of the movable plate away from the first guide column, and the friction bosses abut against the inner wall of the cover shell.

[0011] Furthermore, the cover includes: a cover body, which is covered on the moving component; a plurality of claws, which are extended from the cover body to the first substrate, and the first substrate is provided with a plurality of holes that cooperate with the claws.

[0012] Furthermore, the clamping claw includes a limiting portion and a locking portion connecting the limiting portion and the cover body, and the clamping hole includes a penetration hole and a locking hole that are interconnected. In the process of the clamping claw being clamped into the clamping hole, after the limiting portion passes through the penetration hole, the locking portion moves toward the locking hole so that the locking portion is limited by the hole wall of the locking hole.

[0013] Furthermore, the cover shell further includes: a positioning column, which extends from the cover shell body to the first substrate, and a positioning hole is provided on the first substrate to cooperate with the positioning column. After the snap-fitting part is snapped into the snap-fitting hole, the positioning column is confined in the positioning hole; or, the cover shell further includes: a fixing part, which is extended from the cover shell body, and a fixing hole is provided on the fixing part, and a fixing part is provided in the fixing hole, and the fixing part fixes the fixing part to the first substrate.

[0014] In the technical solution of the present invention, the microstrip phase shifter has the following advantages: 1. High stability and good consistency. During the movement of the mobile feeder, it can always ensure close contact with the first feeder and the second feeder, and the connection is reliable; 2. Good performance, stable power distribution, good standing wave performance, good phase linearity, and uniform phase change; 3. Small size, light weight, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of a microstrip phase shifter according to an embodiment of the present invention;

[0016] Figure 2 Schematic diagram of the exploded structure of an embodiment of a microstrip phase shifter of the present invention;

[0017] Figure 3 Schematic diagram of the exploded structure of another embodiment of the microstrip phase shifter of the present invention;

[0018] Figure 4 Schematic diagram of the exploded structure of another embodiment of the microstrip phase shifter of the present invention;

[0019] Figure 5 Schematic diagram of the structure of the second substrate of the microstrip phase shifter of the present invention;

[0020] Figure 6 Schematic diagram of the structure of the first feed line and the second feed line of the microstrip phase shifter of the present invention;

[0021] Figure 7 Schematic diagram of the exploded structure of another embodiment of the microstrip phase shifter of the present invention;

[0022] Figure 8 Schematic diagram of the exploded structure of another embodiment of the microstrip phase shifter of the present invention;

[0023] Figure 9 is a schematic diagram of the exploded structure of another embodiment of the microstrip phase shifter of the present invention;

[0024] Figure 10 A diagram showing power values ​​of the signal output port when the second substrate of the present invention is moved to different positions;

[0025] Figure 11The voltage standing wave ratio diagram of the signal input port when the second substrate of the present invention moves to different positions;

[0026] Figure 12 This is a phase value diagram of the signal output port 1 when the second substrate of the present invention moves to different positions. The signal output port 1 is a port that requires a constant phase;

[0027] Figure 13 This is the phase value of the signal output port 2 when the second substrate of the present invention moves to different positions. The signal output port 2 is the port requiring a phase change.

[0028] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Please also refer to Figure 1-5 The present invention provides a microstrip phase shifter 100, the microstrip phase shifter 100 comprises: a first substrate 10, the first substrate 10 comprises a first surface and a second surface opposite to each other, the first surface is provided with a metal layer 11 (see Figure 4), the second surface is provided with a first feeder 12 and a second feeder 13 arranged in parallel; a moving component 20, the moving component 20 is movably arranged on the first substrate 10, and the moving component 20 is provided with a moving feeder 21 (see Figure 4-5 ), the movable feeder 21 includes a first feeding portion 211, a second feeding portion 212 and a connecting portion 213 connecting the first feeding portion 211 and the second feeding portion 212, the first feeding portion 211 can be movably stacked on the first feeder 12, and the second feeding portion 212 can be movably stacked on the second feeder 13; the cover 30, the cover 30 is detachably set on the first substrate 10, and the movable component 20 is set between the cover 30 and the first substrate 10.

[0033] In this embodiment, the first substrate 10 can be a common printed circuit board (PCB). This embodiment does not limit the thickness, size and shape of the first substrate 10. Preferably, the shape of the first substrate 10 is rectangular or square. The first substrate 10 has two opposite surfaces, namely the first surface and the second surface, wherein the first surface is provided with the metal layer 11, and the second surface is provided with the first feeder 12 and the second feeder 13. The metal layer 11, the first feeder 12 and the second feeder 13 can be formed on the first substrate 10 through a printed circuit board manufacturing process, or can be attached to the first substrate 10. The first feeder 12 and the second feeder 13 are long strips and are arranged in parallel. The lengths of the first feeder 12 and the second feeder 13 can be equal or unequal. The length extension direction of the first feeder 12 and the second feeder 13 is also the moving direction of the moving component 20. The first feeder 12 has a first end A and a second end B that are far away from each other, and the second feeder 13 has a third end C and a fourth end D that are far away from each other. One of the first end A, the second end B, the third end C and the fourth end D serves as a signal input end, and the first end A, the second end B, the third end C and the fourth end D that are not used as signal input ends can all serve as signal output ends. In this embodiment, in order to achieve the electronic adjustment (changing the phase of the input signal) function, when the moving component 20 moves, at least the end whose phase changes is used as the signal output end.

[0034] In this embodiment, the movable component 20 is movably arranged on the second surface of the first substrate 10 as a whole. A movable feeder 21 is arranged on the surface of the movable component 20 facing the first substrate 10. Specifically, the movable feeder 21 includes a first feeding portion 211, a second feeding portion 212, and a connecting portion 213 connecting the first feeding portion 211 and the second feeding portion 212. The first feeding portion 211 and the second feeding portion 212 are preferably arranged in a long strip shape, and the first feeding portion 211 and the second feeding portion 212 are arranged in parallel. The length extension direction of the first feeding portion 211 and the second feeding portion 212 is the same as the length extension direction of the first feeding portion 12 and the second feeding portion 13. The connecting portion 213 connects the first feeding portion 211 and the second feeding portion 212 by connecting the two ends close to each other. The mobile feeder 21 has a U-shape or a concave shape as a whole, wherein the first feeder 211 is superimposed on the first feeder 12 and is movable relative to the first feeder 12 along the length direction of the first feeder 12, and the second feeder 212 is superimposed on the second feeder 13 and is movable relative to the second feeder 13 along the length direction of the second feeder 13. When a feed signal is input to any of the first end A, the second end B, the third end C, and the fourth end D, the mobile feeder 21 is moved to change the overlapping position of the mobile first feeder 211 and the first feeder 12, and the second feeder 212 and the second feeder 13, thereby changing the length of the path formed by the signal flowing through the first feeder 12, the first feeder 211, the connecting portion 213, the second feeder 212, and the second feeder 13, thereby achieving the purpose of phase adjustment (electrical modulation).

[0035] In a specific embodiment, if Figure 6 As shown, the first feeder 12 and the second feeder 13 are of equal length, the first end A is flush with the third end C, and the second end B is flush with the fourth end D. Figure 7 As shown, the first feeding portion 211 and the second feeding portion 212 can respectively block the first end A and the third end C. In this case, the second end B can be used as a signal input end and the fourth end D can be used as a signal output end, or the fourth end D can be used as a signal input end and the second end B can be used as a signal output end. In this case, when the moving component 20 is moved, the phase of the input signal changes, thereby achieving the purpose of electrical adjustment.

[0036] In another specific embodiment, Figure 8As shown, the first feeder 12 is longer than the second feeder 13, the first end A is not flush with the third end C, and the second end B is flush with the fourth end D. At this time, the first feeder 211 is stacked in the middle of the first feeder 12, neither blocking the first end A nor the second end B, and the second feeder 13 portion 212 blocks the third end C. At this time, the following two situations occur:

[0037] (1) The second end B is used as a signal input end and the first end A and the fourth end D are used as signal output ends. When the moving component 20 is moved, the phase of the signal input from the second end B and output from the first end A does not change, while the phase of the signal input from the second end B and output from the fourth end D changes, thereby achieving the purpose of electronic adjustment;

[0038] (2) The fourth end D is used as a signal input end and the first end A and the second end B are used as signal output ends. At this time, the moving component 20 is moved, and the phase of the signal input from the fourth end D and output from the first end A does not change, while the phase of the signal input from the fourth end D and output from the second end B changes, thereby achieving the purpose of electrical adjustment;

[0039] It can be understood that when the first end A, the second end B, the third end C and the fourth end D are not blocked by the first feeding part 211 and the second feeding part 212, when one of the first end A, the second end B, the third end C and the fourth end D is used as the signal input end, the phase of one of the three ports serving as the signal output ends must change, and the phases of the other two output ports do not change, which will not be elaborated here.

[0040] In this embodiment, the cover shell 30 is detachably arranged on the first substrate 10 to facilitate the disassembly and assembly of the movable component 20, and a receiving space is formed between the cover shell 30 and the first substrate 10. The movable component 20 is movably arranged in the receiving space relative to the first substrate 10 and the cover shell 30, and the movable component 20 is fixed to the first substrate 10 by the cover shell 30.

[0041] In summary, in this embodiment, the metal layer 11 is provided on the first surface of the first substrate 10, the first feeder 12 and the second feeder 13 are provided on the second surface of the first substrate 10, the mobile feeder 21 is provided on the surface of the mobile component 20 facing the first substrate 10, and the first feeding portion 211 of the mobile feeder 21 is stacked on the first feeder 12, and the second feeding portion 212 of the mobile feeder 21 is stacked on the second feeder 13, and the cover 30 is used to limit the mobile component 20 to the cover. A housing 30 is provided between the housing 30 and the first substrate 10 so that the movable component 20 can move stably on the first substrate 10. By moving the movable component 20, the length of the path formed by the signal flowing through the first feed line 12, the first feeding portion 211, the connecting portion 213, the second feeding portion 212, and the second feed line 13 is changed, thereby achieving the purpose of phase adjustment (electrical adjustment). No metal cavity is required, thereby reducing the overall weight of the microstrip phase shifter 100 and reducing the overall size of the microstrip phase shifter 100, and being suitable for multi-port array antennas, especially 5G array antennas.

[0042] Furthermore, since the first feeder 12 has a first end A and a second end B that are far away from each other, and the second feeder 13 has a third end C and a fourth end D that are far away from each other, when one of the first end A, the second end B, the third end C, and the fourth end D is used as a signal input end, the remaining three ends can be used as signal output ends. Among the three signal output ends, one signal output end realizes phase adjustment, and the phases of the remaining two signal output ends cannot be adjusted, and the input signal is directly output. Generally speaking, only one signal output port that does not perform phase adjustment (that is, no phase shift) is required. Therefore, only one of the two signal output ends that cannot adjust the phase can be retained (such as Figure 8 As shown), therefore, in this embodiment, the signal inputted by one signal input terminal is equivalent to being outputted from two signal output terminals through a power divider (one signal output terminal realizes phase shifting, and the other signal output terminal directly outputs the signal according to the original phase). In this way, by inputting a signal through one signal input terminal, two signals can be outputted from two signal output terminals to feed different antenna units, so that the phase shifter and the power divider are integrated into one, thereby further reducing the circuit size and further saving costs.

[0043] Please also refer to Figure 3-5Furthermore, the moving component 20 includes: a second substrate 22, the moving feeder 21 is arranged on the surface of the second substrate 22 facing the first feeder 12 and the second feeder 13; an elastic member 23, the elastic member 23 is arranged on the surface of the second substrate 22 away from the moving feeder 21, and the elastic member 23 is provided with an elastic protrusion 231 protruding toward the second substrate 22; a moving member 24, the moving member 24 includes a moving plate 241 covered on the second substrate 22 and the elastic member 23 and a first guide column 242 provided on the moving plate 241, a first long groove 14 is opened on the first substrate 10, and the first guide column 242 passes through the elastic member 23 and the second substrate 22 in sequence and can move in the first long groove 14.

[0044] In this embodiment, the second substrate 22 can be a common printed circuit board (PCB). The present invention does not limit the thickness, size and shape of the second substrate 22. Preferably, the shape of the second substrate 22 is rectangular or square. The second substrate 22 has two opposite surfaces, wherein the surface of the second substrate 22 facing the first feeder 12 and the second feeder 13 is provided with the movable feeder 21, so that after the second substrate 22 is placed on the first substrate 10, the movable feeder 21 can be overlapped with the first feeder 12 and the second feeder 13. It can be understood that in order to place the second substrate 22 in the accommodating space formed by the first substrate 10 and the cover 30, the size of the second substrate 22 is smaller than the size of the first substrate 10.

[0045] In this embodiment, the elastic member 23 is provided on the surface of the second substrate 22 away from the movable feeder 21, that is, the second substrate 22 is provided between the first substrate 10 and the elastic member 23. The elastic member 23 presses the second substrate 22 toward the first substrate 10 by elastic force, so that the movable feeder 21 is closely arranged with the first feeder 12 and the second feeder 13. Specifically, the shape of the elastic member 23 is preferably sheet-shaped to increase the contact area between the elastic member 23 and the movable member 24. The material of the elastic member 23 can be plastic or other materials. ; Further, by providing an elastic protrusion 231 protruding toward the second substrate 22 on the elastic member 23, the elastic force of the elastic member 23 on the second substrate 22 is increased. The number of the elastic protrusions 231 can be set to multiple according to actual conditions. The elastic protrusion 231 is preferably an elastic boss, that is, the contact surface between the elastic protrusion 231 and the second substrate 22 is a plane, thereby increasing the contact area between the elastic protrusion 231 and the second substrate 22. When the elastic protrusion 231 is in a compressed state, the elastic force and force uniformity of the second substrate 22 are improved.

[0046] In this embodiment, the movable member 24 is used to drive the elastic member 23 and the second substrate 22 to move along the length extension direction of the first feeder 12 under the pull of an external force, thereby changing the overlap state of the movable feeder 21 with the first feeder 12 and the second feeder 13, and further changing the length of the path formed by the signal flowing through the first feeder 12, the movable feeder 21 and the second feeder 13, thereby achieving the purpose of adjusting the phase.

[0047] Specifically, the movable plate 241 of the movable member 24 is covered on the second substrate 22 and the elastic member 23, that is, the elastic member 23 is arranged between the second substrate 22 and the movable plate 241, and the movable plate 241 is used to press the elastic member 23 toward the second substrate 22, so that the movable feeder 21 of the second substrate 22 is tightly arranged with the first feeder 12 and the second feeder 13 under pressure. At the same time, the first guide column 242 is provided on the surface of the movable plate 241 facing the elastic member 23, and the first guide column 242 is arranged according to the second substrate 22. It passes through the elastic member 23 and the second substrate 22 and extends to the first long groove 14 opened on the first substrate 10. The first long groove 14 extends along the moving direction of the moving component 20. When the moving plate 241 is moved by external tension, the first guide column 242 drives the elastic member 23 and the second substrate 22 to move together. At the same time, the end of the first guide column 242 away from the moving plate 241 moves in the first long groove 14. The first long groove 14 serves to limit the moving direction of the first guide column 242.

[0048] Furthermore, an insulating medium is provided on the first feeder 12 and the second feeder 13 , and / or an insulating medium is provided on the movable feeder 21 .

[0049] In this embodiment, since the first feeder 12, the second feeder 13, and the mobile feeder 21 are all made of conductive metal, if the first feeder 12, the second feeder 13 directly contacts the mobile feeder 21, during the long-term relative movement of the first feeder 12, the second feeder 13, and the mobile feeder 21, the first feeder 12, the second feeder 13, and the mobile feeder 21 may wear due to mutual friction. Therefore, by providing an insulating medium on the first feeder 12, the second feeder 13, and / or the mobile feeder 21, the mobile feeder 21 is isolated from the first feeder 12 and the second feeder 13 by the insulating medium, and the first feeder 12, the second feeder 13, and the mobile feeder 21 do not directly contact each other, thereby avoiding wear of the first feeder 12, the second feeder 13, and the mobile feeder 21 due to contact friction.

[0050] In addition, under the elastic force of the elastic member 23, the mobile feeder 21 is always closely disposed with the first feeder 12 and the second feeder 13. Therefore, at the position where the mobile feeder 21 overlaps with the first feeder 12 and the second feeder 13, the gap between the mobile feeder 21 and the first feeder 12 and the second feeder 13 is very small (because the insulating medium is very thin). Signals are transmitted between the first feeder 12, the second feeder 13 and the mobile feeder 21 in a coupled manner, with almost no signal loss. Therefore, the insulating medium does not cause signal transmission failure or excessive signal loss between the first feeder 12, the second feeder 13 and the mobile feeder 21.

[0051] Please also refer to Figure 2-3 8. In one embodiment, the movable member 24 further includes: a second guide post 243, the second guide post 243 is arranged on the surface of the movable plate 241 away from the first guide post 242, the cover 30 is provided with a second long slot 31, and the second guide post 243 extends out of the cover 30 through the second long slot 31; the microstrip phase shifter 100 further includes a pull rod (not shown), and the pull rod is connected to one end of the second guide post 243 extending out of the second long slot 31.

[0052] In this embodiment, a second guide post 243 is provided on the surface of the movable plate 241 away from the first guide post 242, that is, on the surface of the movable plate 241 away from the elastic member 23. At the same time, a second long slot 31 is provided on the cover shell 30. The second long slot 31 extends along the moving direction of the movable assembly 20. The second guide post 243 passes through the second long slot 31 and extends to the outside of the second long slot 31 to connect with the pull rod. When the pull rod is subjected to external tension, the pull rod moves with the second guide post 243 in the second long slot 31. At the same time, the second guide post 243 moves with the movable plate 241, the elastic member 23 and the second substrate 22 relative to the first substrate 10. At the same time, the movable plate 241 moves with the first guide post 242 in the first long slot 14. The second long slot 31 serves to limit the moving direction of the second guide post 243. It can be understood that Figure 8 As shown, at this time, the movable plate 241 can be completely accommodated in the cover shell 30.

[0053] Specifically, the pull rod can be provided with a plurality of grooves that cooperate with the second guide column 243, and one end of the second guide column 243 extends out of the second long slot 31 and extends into the groove to achieve the fixation of the pull rod and the second guide column 243. Preferably, the plurality of grooves can be arranged in a row in the moving direction of the moving component 20, and the relative position of the pull rod and the second guide column 243 can be adjusted by cooperating with different grooves and the second guide column 243.

[0054] like Figure 1 As shown, in another embodiment, the microstrip phase shifter 100 further includes: a pull rod (not shown), and a connecting column 244 fixedly connected to the pull rod is further provided on the movable plate 241, and the connecting column 244 is provided at either end of the moving direction of the movable member 24, and one end of the movable plate 241 provided with the connecting column 244 extends out of the cover 30.

[0055] In this embodiment, the connecting post 244 is provided at either end of the moving member 24 in the direction of movement. The end of the moving plate 241 provided with the connecting post 244 extends outside the housing 30, and the pull rod is connected to the connecting post 244. When the pull rod is subjected to external tension, the pull rod moves the moving plate 241, the elastic member 23, and the second substrate 22 on the first substrate 10. Simultaneously, the moving plate 241 moves the first guide post 242 within the first slot 14. The first slot 14 serves to limit the movement direction of the first guide post 242. In this case, the second guide post 243 and the second slot 31 of the above embodiment can be removed, simplifying the function of the microstrip phase shifter 100. Specifically, the pull rod can be provided with a plurality of grooves that cooperate with the connecting column 244, and the connecting column 244 extends into the grooves to achieve the fixation of the pull rod and the connecting column 244. Preferably, the plurality of grooves can be arranged in a row in the moving direction of the moving component 20, and the relative position of the pull rod and the connecting column 244 can be adjusted by cooperating with different grooves and the connecting column 244.

[0056] See also Figure 2-4 Furthermore, the movable member 24 further includes: a plurality of limit blocks 245, wherein the plurality of limit blocks 245 are protruding from the surface of the movable plate 241 facing the first substrate 10, and the second substrate 22 and the elastic member 23 are limited between the limit blocks 245; and / or, the movable member 24 further includes: a plurality of friction bosses 246, wherein the friction bosses 246 are arranged on the surface of the movable plate 241 away from the first guide column 242, and the friction bosses 246 abut against the inner wall of the cover shell 30.

[0057] In this embodiment, a plurality of limit blocks 245 are provided on the surface of the movable plate 241 facing the first substrate 10, and the limit blocks 245 are preferably provided on the edge of the movable plate 241. The second substrate 22 and the elastic member 23 are limited between the plurality of limit blocks 245 to prevent the second substrate 22 and the elastic member 23 from loosening during the movement of the movable plate 241, and further ensure that the second substrate 22 and the elastic member 23 will move synchronously with the movable plate 241. It can be understood that the plurality of limit blocks 245 can also be replaced by limit convex edges.

[0058] In this embodiment, a plurality of friction bosses 246 are provided on the surface of the movable plate 241 away from the first guide column 242. The friction bosses 246 are protruding from the movable plate 241. The top ends of the friction bosses 246 abut against the inner wall of the cover shell 30. During the movement of the movable plate 241, the friction bosses 246 abut and slide against the inner wall of the cover shell 30, thereby reducing the contact area between the movable part 24 and the cover shell 30, thereby achieving the effect of reducing friction, making the movable part 24 easier to pull.

[0059] See also Figure 2 Furthermore, the cover 30 includes: a cover body 32, the cover body 32 is covered on the moving component 20; a plurality of claws 33, the plurality of claws 33 are extended from the cover body 32 to the first substrate 10, and the first substrate 10 is provided with a plurality of clamping holes 15 that cooperate with the claws 33.

[0060] In this embodiment, the cover body 32 is covered on the movable component 20 so that the movable component 20 can move between the cover body 32 and the first substrate 10. A plurality of claws 33 are formed by extending from the cover body 32 to the first substrate 10. The plurality of claws 33 are respectively engaged with the holes 15 opened on the first substrate 10. The cover body 32 is fixedly connected to the first substrate 10 through the cooperation between the claws 33 and the holes 15. At the same time, the movable component 20 is limited to the first substrate 10 by the cover body 32. The number of the claws 33 is preferably four, and they are arranged at the four corners of the cover body 32 to improve the connection stability between the cover body 32 and the first substrate 10.

[0061] See also Figure 2 Furthermore, the clamping claw 33 includes a limiting portion 331 and a locking portion 332 connecting the limiting portion 331 and the cover body 32, and the clamping hole 15 includes a penetration hole 151 and a locking hole 152 that are connected to each other. When the clamping claw 33 is clamped into the clamping hole 15, after the limiting portion 331 passes through the penetration hole 151, the locking portion 332 moves toward the locking hole 152, so that the locking portion 332 is limited by the hole wall of the locking hole 152.

[0062] In this embodiment, the engaging portion 332 connects the cover body 32 and the limiting portion 331, the claw 33 is generally L-shaped, the penetration hole 151 is connected to the engaging hole 152, and the engaging hole 15 is also generally L-shaped. In the process of the claw 33 being engaged with the engaging hole 15, after the limiting portion 331 passes through the penetration hole 151, the engaging portion 332 is located in the penetration hole 151. By moving the engaging portion 332 toward the engaging hole 152, the engaging portion 332 is limited by the hole wall of the engaging hole 152, so that the claw 33 is clamped with the engaging hole 15. The disassembly process of the claw 33 and the engaging hole 15 is opposite to the above process, thereby realizing the engaging and detachable connection between the cover 30 and the first substrate 10.

[0063] See also Figure 4 、 9 Furthermore, the cover shell 30 further includes: a positioning column 34, the positioning column 34 extends from the cover shell body 32 toward the first substrate 10, and the first substrate 10 is provided with a positioning hole 16 that cooperates with the positioning column 34. After the engaging portion 332 is engaged with the engaging hole 152, the positioning column 34 is limited in the positioning hole 16; or, the cover shell 30 further includes: a fixing portion 35, the fixing portion 35 is extended from the cover shell body 32, a fixing hole is provided on the fixing portion 35, and a fixing member 40 is provided in the fixing hole, and the fixing member 40 fixes the fixing portion 35 to the first substrate 10.

[0064] In one embodiment, if Figure 4 The positioning post 34 is further extended from the cover body 32 toward the first substrate 10, and a positioning hole 16 that cooperates with the positioning post 34 is opened on the first substrate 10. After the engaging portion 332 is engaged with the engaging hole 152, the positioning post 34 is just engaged with the positioning hole 16, so that the positioning post 34 is restricted in the positioning hole 16. In this way, the engaging portion 332 can be prevented from easily detaching from the engaging hole 152, further improving the connection stability between the cover body 32 and the first substrate 10.

[0065] In another embodiment, Figure 9, a fixing portion 35 is formed by extending outward from the cover body 32, and a fixing hole is provided on the fixing portion 35. A fixing member 40 is provided in the fixing hole. The first substrate 10 can be provided with a through hole such as a threaded hole that cooperates with the fixing member 40. The fixing member 40 can be a screw or a bolt. The fixing portion 35 is fixed to the first substrate 10 through the cooperation of the fixing member 40 and the threaded hole. In this way, the engaging portion 332 can be prevented from easily detaching from the engaging hole 152, further improving the connection stability between the cover body 32 and the first substrate 10.

[0066] Figure 10 The power value of the signal output port when the second substrate 22 moves to different positions shows that the power value is stably maintained at around 3 dB, with a small fluctuation range of less than 0.9 dB. Figure 11 The voltage standing wave ratio of the signal input port is shown when the second substrate 22 is moved to different positions. It can be seen that the voltage standing wave ratio is small and the voltage standing wave ratio value is kept below 1.27 in a wide frequency band. Figure 12 The phase value of the signal output port 1 when the second substrate 22 moves to different positions. The signal output port 1 is a port that requires a constant phase. Its phase value changes slightly, and the change is less than 3 degrees at the frequency of 2.6 GHz. Figure 13 It is the phase value of the signal output port 2 when the second substrate 22 moves to different positions. The signal output port 2 is the port that requires phase change. Its output phase linearity is good, and when moving the same distance, the phase change is almost equal and uniform.

[0067] In summary, the microstrip phase shifter 100 of the present invention has the following advantages: 1. High stability and good consistency. During the movement of the mobile feeder 21, it can always maintain close contact with the first feeder 12 and the second feeder 13, and the connection is reliable; 2. Good performance, stable power distribution, good standing wave performance, good phase linearity, and uniform phase change; 3. Small size, light weight, and low cost.

[0068] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A microstrip phase shifter, characterized in that: The microstrip phase shifter comprises: a first substrate, the first substrate comprising a first surface and a second surface opposite to each other, the first surface being provided with a metal layer, and the second surface being provided with a first feed line and a second feed line arranged in parallel; A movable component, the movable component being movably disposed on the first substrate, the movable component being provided with a movable feeder, the movable feeder comprising a first feeding portion, a second feeding portion, and a connecting portion connecting the first feeding portion and the second feeding portion, the first feeding portion being movably stacked on the first feeder, and the second feeding portion being movably stacked on the second feeder; a cover shell, wherein the cover shell is detachably disposed on the first substrate, and the movable component is disposed between the cover shell and the first substrate; The first feeder has a first end and a second end that are spaced apart from each other, the second feeder has a third end and a fourth end that are spaced apart from each other, one of the first end, the second end, the third end, and the fourth end serves as a signal input end, and at least one of the first end, the second end, the third end, and the fourth end whose phase changes serves as a signal output end; The length of the first feeder is greater than that of the second feeder, the first end is not flush with the third end, and the second end is flush with the fourth end; The mobile component includes: a second substrate, the movable feeder being arranged on a surface of the second substrate facing the first feeder and the second feeder; an elastic member, the elastic member being arranged on a surface of the second substrate facing away from the movable feeder, the elastic member being provided with an elastic protrusion protruding toward the second substrate; a moving member, the moving member comprising a moving plate covering the second substrate and the elastic member, and a first guide post provided on the moving plate, wherein a first long slot is formed on the first substrate, and the first guide post sequentially passes through the elastic member and the second substrate and is movable in the first long slot; The moving part also includes: a second guide post, the second guide post being disposed on a surface of the movable plate facing away from the first guide post, the cover being provided with a second long slot, the second guide post extending out of the cover through the second long slot; the microstrip phase shifter further comprising a pull rod connected to an end of the second guide post extending out of the second long slot; An insulating medium is provided on the first feeder and the second feeder, and / or an insulating medium is provided on the movable feeder; The moving member further includes: a plurality of friction bosses, which are arranged on a surface of the moving plate facing away from the first guide column, and the friction bosses abut against the inner wall of the cover shell.

2. The microstrip phase shifter according to claim 1, wherein: Also includes: The pull rod is further provided on the movable plate with a connecting column fixedly connected to the pull rod, the connecting column is provided at either end of the moving direction of the movable part, and one end of the movable plate provided with the connecting column extends out of the cover shell.

3. The microstrip phase shifter according to claim 1, wherein: The moving part also includes: A plurality of limit blocks are protruded on the surface of the movable plate facing the first substrate, and the second substrate and the elastic member are limited between the limit blocks.

4. The microstrip phase shifter according to any one of claims 1 to 3, wherein: The housing comprises: A cover body, wherein the cover body is disposed on the moving component; A plurality of claws are formed by extending from the housing body toward the first substrate, and a plurality of holes cooperating with the claws are formed on the first substrate.

5. The microstrip phase shifter according to claim 4, wherein: The clamping claw includes a limiting portion and a locking portion connecting the limiting portion and the cover body, and the locking hole includes a penetration hole and a locking hole that are interconnected. When the clamping claw is clamped into the locking hole, after the limiting portion passes through the penetration hole, the locking portion moves toward the locking hole so that the locking portion is limited by the hole wall of the locking hole.

6. The microstrip phase shifter according to claim 5, wherein: The housing further comprises: A positioning post, the positioning post extending from the housing body toward the first substrate, the first substrate being provided with a positioning hole cooperating with the positioning post, and the positioning post being confined in the positioning hole after the engaging portion is engaged with the engaging hole; or The housing further comprises: The fixing portion is formed by extending from the cover body, the fixing portion is provided with a fixing hole, a fixing piece is provided in the fixing hole, and the fixing piece fixes the fixing portion on the first substrate.

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