Phase shifter with fan-shaped PCB (Printed Circuit Board)

Abstract

The utility model discloses a phase shifter provided with a fan-shaped PCB (printed circuit board), and aims to solve the problem that the gain and attractiveness of an antenna are affected by too many and too long cables due to the adoption of a fan-shaped pcb (printed circuit board) matched cable or a cavity matched cable mode in the conventional 690-960MHZ phase shifter. The phase shifter comprises a low-frequency PCB and a rotating slip sheet rotating around a common circle center, a first microstrip line is etched on the upper surface of the low-frequency PCB, the rotating slip sheet comprises a medium slip sheet, an upper clamping piece and a lower clamping piece, a second microstrip line is etched on the lower surface of the medium slip sheet, and the first microstrip line and the second microstrip line are in one-to-one correspondence in position. According to the utility model, the coaxial cable is adopted for connection, and the first microstrip line adopts a slow wave structure to reduce the physical length, so that the physical length of a transmission line required by phase shift is smaller, thereby facilitating reduction of the size of a phase shifter, lower loss of an array antenna, higher gain and better aesthetic property.

Description

Technical Field

[0001] This utility model belongs to the field of phase shifter technology, and specifically relates to a phase shifter with a fan-shaped PCB board. Background Technology

[0002] Traditional phase shifter designs include various types, such as mechanical, analog, and digital phase shifters. Mechanical phase shifters change the phase by physically moving a dielectric sheet, while analog and digital phase shifters use electronic circuits to adjust the phase. With technological advancements, higher demands are placed on miniaturization, broadband speed, and cost reduction of phase shifters. Existing phase shifter implementations mainly fall into two categories: variable-length phase shifters and dielectric-sliding phase shifters. Variable-length phase shifters change the phase by altering the physical length of the signal transmission path, while dielectric-sliding phase shifters adjust the phase by moving a dielectric sheet. These schemes each have their own characteristics in implementation, but they also have some drawbacks, such as the larger size of variable-length phase shifters and potentially higher insertion and return losses in dielectric-sliding phase shifters.

[0003] Current 690-960MHz phase shifters use either fan-shaped PCBs with cables or cavity-type PCBs with cables. The cable length is matched according to the antenna's performance requirements to optimize the phase difference between radiating elements and achieve better radiation performance. However, using longer transmission lines to achieve the required phase shift results in a less compact physical layout, increasing physical size and signal loss, thereby reducing antenna gain and hindering the miniaturization and aesthetics of antenna equipment. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a phase shifter with a fan-shaped PCB board. This phase shifter aims to solve the problem that existing 690-960MHz phase shifters use fan-shaped PCBs with cables or cavity-type cables, where excessive and long cables affect the antenna gain and aesthetics.

[0006] (2) Technical solution

[0007] To address the aforementioned technical problems, this utility model provides a phase shifter with a fan-shaped PCB board. The phase shifter includes a low-frequency PCB board and a rotating slider that rotates around a common center. The upper surface of the low-frequency PCB board is etched with a first microstrip line. The rotating slider includes a dielectric slider, an upper clamping member, and a lower clamping member. The lower surface of the dielectric slider is etched with a second microstrip line. The positions of the first microstrip line and the second microstrip line correspond one-to-one. Multiple first spring walls are fixedly connected to both sides of the upper clamping member, and multiple second spring walls are fixedly connected to both sides of the lower clamping member. The first and second spring walls are used to clamp the dielectric slider as it slides on the low-frequency PCB board, causing a corresponding change in the phase of the transmission line.

[0008] Preferably, the first microstrip line includes a first central line and three arc-shaped bends. One end of the first central line is connected to the input port through the microstrip main transmission line, and the other end of the first central line is connected to a short-circuit microstrip line. The middle of the short-circuit microstrip line is S-shaped. The centers of the three arc-shaped bends are on the first central line, and the left and right ends of each arc-shaped bend are connected to an output port through the microstrip wall.

[0009] Furthermore, the second microstrip line includes a second central line and three microstrip arc arms, with the centers of the three microstrip arc arms located on the second central line. The second central line and the three microstrip arc arms are all connected by conductive lines.

[0010] Furthermore, there are two sets of phase movers. The upper clamping member has limit holes and mounting holes on its front and rear sides, respectively. The lower clamping member has a positioning hole in its middle. The upper surface of the lower clamping member has elastic locking pins and mounting pins fixedly connected to its front and rear sides, respectively. The lower surface of the upper clamping member has two positioning pins fixedly connected to its lower surface, and the positioning holes correspond to the positions of the positioning pins.

[0011] Furthermore, the upper clamping member is integrally formed with the first spring wall, the rear side of the first spring wall is bent forward and backward, the front side of the first spring wall is bent forward, the lower clamping member is integrally formed with the second spring wall, the rear side of the second spring wall is bent forward and backward, and the front side of the second spring wall is bent forward.

[0012] Furthermore, it also includes two fixed brackets. The left and right sides of the low-frequency PCB board are fixedly connected to the two fixed brackets by limit screws. The front and rear sides of the lower surface of the fixed brackets are fixedly connected to columns. The bottom of the columns is fixedly connected to elastic blocks. The front and rear sides of the upper surface of the fixed brackets are provided with corresponding snap-fit ​​holes for the elastic blocks.

[0013] Furthermore, it also includes a reinforcing pad, which is attached to the lower surface of the low-frequency PCB board, and multiple cable slots are fixedly connected to the upper surface of the mounting bracket.

[0014] Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model uses two fixed brackets to fix the low-frequency PCB board, and the fixed brackets are provided with elastic blocks and locking holes. When multiple positive and negative phase shifter components are stacked and installed, the upper elastic block will lock into the lower locking hole, which can not only connect them into a whole, but also make the multi-layer interlocking more secure.

[0017] This invention provides a positioning hole on the lower clamping member and a positioning post on the upper clamping member. When the two phase shifter assemblies are stacked and installed, the positioning post on the lower clamping member will be inserted into the positioning hole on the upper clamping member, thereby enabling the upper and lower positive and negative polarization phase shifters to be connected in series and linked, ensuring the consistency of amplitude and phase changes when the positive and negative polarization phase shifters are working.

[0018] This invention involves etching a first microstrip line onto a fan-shaped low-frequency PCB board and a second microstrip line onto a dielectric slider, connected by a coaxial cable. During operation, the first and second spring walls clamp the dielectric slider as it slides on the low-frequency PCB board, causing a corresponding change in the phase of the transmission line. Because the first microstrip line uses a slow-wave structure to reduce its physical length, the physical length of the transmission line required for phase shifting is smaller, which helps to reduce the size of the phase shifter. At the same time, shorter cables are used between the phase shifter's outputs to connect with the radiating elements. With the same spacing and number of radiating elements, the array antenna has lower loss, higher gain, lower cost, and better aesthetics. Attached Figure Description

[0019] Figure 1 This is an exploded structural diagram of the present invention.

[0020] Figure 2 This is a top view of the structure of this utility model.

[0021] Figure 3 This is an exploded structural diagram of the rotating slider of this utility model.

[0022] Figure 4 This is a schematic diagram of the connection structure of the two sets of phase shifters of this utility model.

[0023] Figure 5 This is a schematic diagram of the connection structure of multiple phase shifters of this utility model.

[0024] The labels in the attached diagram are as follows: 1. Low-frequency PCB board; 2. Rotating slider; 3. First microstrip line; 4. Dielectric slider; 5. Upper clamping component; 6. Lower clamping component; 7. Second microstrip line; 8. First spring wall; 9. Second spring wall; 10. Fixed bracket; 11. Column; 12. Elastic block; 13. Snap-fit ​​hole; 14. Reinforcing pad; 15. Cable slot; 301. First center line; 302. Arc-shaped bent microstrip line; 303. Microstrip main transmission line; 304. Output port; 305. Microstrip wall; 306. Short-circuited microstrip line; 501. Limiting hole; 502. Mounting hole; 503. Positioning hole; 601. Elastic locking post; 602. Mounting post; 603. Positioning post; 701. Second center line; 702. Microstrip arc arm; 703. Conductive line. Detailed Implementation

[0025] This specific embodiment is a phase shifter with a fan-shaped PCB board, and its structural schematic diagram is shown below. Figures 1-5 As shown, the phase shifter includes a low-frequency PCB board 1 and a rotating slider 2 that rotates around a common center. Specifically, the low-frequency PCB board 1 has a fan-shaped structure with a frequency of 690-960MHz. The phase shifter includes both power division and phase shifting functions. It drives the rotating slider 2 to move between the low-frequency PCB boards 1 through a transmission component, so that the phase shifter can adjust the phase more flexibly to adapt to different performance requirements. The upper surface of the low-frequency PCB board 1 is etched with a first microstrip line 3. The rotating slider 2 includes a dielectric slider 4, an upper clamping member 5, and a lower clamping member 6. The lower surface of the dielectric slider 4 is etched with a second microstrip line 7. The positions of the first microstrip line 3 and the second microstrip line 7 correspond one-to-one. Multiple first spring walls 8 are fixedly connected to the left and right sides of the upper clamping member 5, and multiple second spring walls 9 are fixedly connected to the left and right sides of the lower clamping member 6. The first spring walls 8 and the second spring walls 9 are used to clamp the dielectric slider 4 and slide it on the low-frequency PCB board 1 to cause the phase of the transmission line to change accordingly.

[0026] like Figure 1 and Figure 2As shown: In this embodiment, the first microstrip line 3 includes a first central line 301 and three arc-shaped bent microstrip lines 302. One end of the first central line 301 is connected to the input port through the microstrip main transmission line 303, and the other end of the first central line 301 is connected to a short-circuit microstrip line 306. The middle part of the short-circuit microstrip line 306 is S-shaped. Specifically, the short-circuit microstrip line 306 is a 1 / 4 wavelength short-circuit microstrip line or a 1 / 4 wavelength short-circuit stub microstrip line. Here, the strip line is used as a transmitter. For applications such as frequency signal lightning protection, electrostatic discharge protection, or impedance matching transformers, the centers of the three arc-shaped bent microstrip lines 302 are located on the first center line 301, and the radii of the three arc-shaped bent microstrip lines 302 are arranged in a certain proportional relationship. Specifically, the arc-shaped bent microstrip line 302 is an arc-shaped slow-wave structure. The slow-wave structure reduces the physical length, which is beneficial to reducing the size of the phase shifter. The left and right ends of each arc-shaped bent microstrip line 302 are connected to an output port 304 through a microstrip wall 305.

[0027] like Figure 1 and Figure 2 As shown: In this embodiment, the second microstrip line 7 includes a second central line 701 and three microstrip arc arms 702. The centers of the three microstrip arc arms 702 are on the second central line 701. The second central line 701 and the three microstrip arc arms 702 are connected by conductive lines 703. When the rotating slider 2 moves between the low-frequency PCB board 1, the three microstrip arc arms 702 move along the corresponding three arc-shaped bent microstrip lines 302.

[0028] like Figure 1 , Figure 3 and Figure 4 As shown: In this embodiment, there are two sets of phase shifters. The upper clamping member 5 has a limit hole 501 and a mounting hole 502 on its front and rear sides, respectively. The lower upper clamping member 5 has a positioning hole 503 in the middle. The upper surface of the lower clamping member 6 has elastic locking pins 601 and mounting pins 602 fixedly connected to its front and rear sides, respectively. The lower surface of the upper lower clamping member 6 has two positioning pins 603 fixedly connected. The positioning hole 503 and the positioning pin 603 are positioned correspondingly. In order to improve synchronization, after the low frequency PCB board 1 of the two sets of phase shifters is fixed, the position of the rotating slider 2 is the same, and the common center of the two sets of rotating sliders 2 is concentric. The inner diameter of the positioning hole 503 is the same as the outer diameter of the positioning pin 603.

[0029] like Figure 3As shown, the elastic locking post 601 and the lower clamping member 6 are integrally injection molded. The elastic locking post 601 has a connecting post and a limiting block. When connected, the connecting post can deform. After the upper clamping member 5 and the lower clamping member 6 are installed, the elastic locking post 601 is locked in the limiting hole 501. The mounting post 602 passes through the first center line 301 and the second center line 701 and is located in the mounting hole 502. The upper clamping member 5 and the lower clamping member 6 can rotate around the center of the mounting post 602. At the same time, the first elastic wall 8 and the second elastic wall 9 press the medium sliding plate 4 on the low frequency PCB board 1.

[0030] like Figure 4 and Figure 5 As shown, after the upper and lower phase shifter assemblies are stacked and installed, the positioning pin 603 on the lower clamping member 6 of the upper group will be inserted into the positioning hole 503 on the upper clamping member 5 of the lower group, so that the upper and lower positive and negative polarization phase shifters can be connected in series and linked to ensure the consistency of amplitude and phase changes when the positive and negative polarization phase shifters are working.

[0031] like Figure 2 and Figure 3 As shown: In this embodiment, the upper clamping member 5 is integrally formed with the first spring wall 8, the rear first spring wall 8 is bent forward and backward, the front first spring wall 8 is bent forward, the lower clamping member 6 is integrally formed with the second spring wall 9, the rear second spring wall 9 is bent forward and backward, and the front second spring wall 9 is bent forward.

[0032] In this way, the first spring wall 8 and the second spring wall 9 can effectively fit the rotating slider 2 with the low-frequency PCB board 1, ensuring the stability of the phase shifter during operation.

[0033] like Figure 1 and Figure 2 As shown: In this embodiment, two fixed brackets 10 are also included. The left and right sides of the low frequency PCB board 1 are fixedly connected to the two fixed brackets 10 by limiting screws. The front and rear sides of the lower surface of the fixed bracket 10 are fixedly connected to the columns 11. The bottom end of the columns 11 is fixedly connected to the elastic blocks 12. The front and rear sides of the upper surface of the fixed bracket 10 are provided with corresponding snap-fit ​​holes 13. The elastic blocks 12 are integrally injection molded with the fixed bracket 10 and the columns 11. The elastic blocks 12 form a connecting column and a limiting block. The connecting column can deform when connected.

[0034] After multiple positive and negative phase shifter components are stacked and installed in this way, the upper elastic locking block 12 will lock into the lower locking hole 13, which can not only connect them into a whole, but also make the multi-layer interlocking more secure.

[0035] like Figure 1As shown: In this embodiment, a reinforcing pad 14 is also included. The reinforcing pad 14 is attached to the lower surface of the low-frequency PCB board 1, and multiple cable slots 15 are fixedly connected to the upper surface of the fixing bracket 10.

[0036] This allows the second spring wall 9 to slide along the reinforcing pad 14 during movement, avoiding wear between it and the low-frequency PCB board 1. At the same time, the cable slot 15 secures the connected coaxial cable, making the overall appearance more aesthetically pleasing.

[0037] Working principle: The first microstrip line 3 is etched on the fan-shaped low-frequency PCB board 1, and the second microstrip line 7 is etched on the dielectric slider 4. They are connected by a coaxial cable. During operation, the first spring wall 8 and the second spring wall 9 clamp the dielectric slider 4 and slide it on the low-frequency PCB board 1, causing the phase of the transmission line to change accordingly. Since the first microstrip line 3 adopts a slow wave structure to reduce the physical length, the physical length of the transmission line required for phase shift is smaller, which helps to reduce the size of the phase shifter. At the same time, a shorter cable is used between the outputs of the phase shifter to connect with the radiating element. With the same spacing and number of radiating elements, the array antenna has lower loss, higher gain, and lower cost.

[0038] All technical features in this embodiment can be freely combined according to actual needs.

[0039] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A phase shifter with a fan-shaped PCB board, the phase shifter comprising a low-frequency PCB board (1) and a rotating slider (2) rotating around a common center, characterized in that: The upper surface of the low-frequency PCB board (1) is etched with a first microstrip line (3). The rotating slider (2) includes a dielectric slider (4), an upper clamping member (5), and a lower clamping member (6). The lower surface of the dielectric slider (4) is etched with a second microstrip line (7). The positions of the first microstrip line (3) and the second microstrip line (7) correspond one-to-one. Multiple first spring walls (8) are fixedly connected to the left and right sides of the upper clamping member (5). Multiple second spring walls (9) are fixedly connected to the left and right sides of the lower clamping member (6). The first spring walls (8) and the second spring walls (9) are used to clamp the dielectric slider (4) to slide on the low-frequency PCB board (1) so that the phase of the transmission line changes accordingly.

2. The phase shifter with a fan-shaped PCB board according to claim 1, characterized in that, The first microstrip line (3) includes a first central line (301) and three arc-shaped bend microstrip lines (302). One end of the first central line (301) is connected to the input port through the microstrip main transmission line (303). The other end of the first central line (301) is connected to a short-circuit microstrip line (306). The middle part of the short-circuit microstrip line (306) is S-shaped. The center of the three arc-shaped bend microstrip lines (302) is on the first central line (301). The left and right ends of each arc-shaped bend microstrip line (302) are connected to an output port (304) through a microstrip wall (305).

3. The phase shifter with a fan-shaped PCB board according to claim 1, characterized in that, The second microstrip line (7) includes a second center line (701) and three microstrip arc arms (702). The centers of the three microstrip arc arms (702) are on the second center line (701). The second center line (701) and the three microstrip arc arms (702) are connected by conductive lines (703).

4. The phase shifter with a fan-shaped PCB board according to claim 1, characterized in that, The phase shifter is in two sets. The upper clamping member (5) has a limit hole (501) and a mounting hole (502) on its front and rear sides respectively. The lower clamping member (5) has a positioning hole (503) in the middle. The upper surface of the lower clamping member (6) is fixedly connected to the front and rear sides of the upper surface with an elastic locking post (601) and a mounting post (602) respectively. The lower surface of the lower clamping member (6) is fixedly connected to two positioning posts (603). The positioning hole (503) corresponds to the position of the positioning post (603).

5. The phase shifter with a fan-shaped PCB board according to claim 1, characterized in that, The upper clamping member (5) is integrally formed with the first spring wall (8). The rear side of the first spring wall (8) bends forward and backward, and the front side of the first spring wall (8) bends forward. The lower clamping member (6) is integrally formed with the second spring wall (9). The rear side of the second spring wall (9) bends forward and backward, and the front side of the second spring wall (9) bends forward.

6. The phase shifter with a fan-shaped PCB board according to claim 1, characterized in that, It also includes two fixed brackets (10). The left and right sides of the low frequency PCB board (1) are fixedly connected to the two fixed brackets (10) by limit screws. The front and rear sides of the lower surface of the fixed bracket (10) are fixedly connected to columns (11). The bottom end of the column (11) is fixedly connected to an elastic block (12). The front and rear sides of the upper surface of the fixed bracket (10) are provided with snap-fit ​​holes (13) corresponding to the elastic block (12).

7. The phase shifter with a fan-shaped PCB board according to claim 6, characterized in that, It also includes a reinforcing pad (14), which is attached to the lower surface of the low-frequency PCB board (1), and multiple cable slots (15) are fixedly connected to the upper surface of the fixing bracket (10).

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