Phase shifter and base station antenna

Abstract

The embodiment of the invention provides a phase shifter and a base station antenna. The phase shifter comprises a fixed frame, a phase shifting strip line and a sliding medium. The fixed frame comprises a guide rail. The phase shift strip line is fixed on the guide rail. The sliding medium is in sliding connection with the guide rail and is separated from the phase-shifting strip line through the guide rail. The guide rail can guide the movement of the sliding medium relative to the phase-shifting strip line, thereby facilitating the improvement of the smoothness of the movement of the sliding medium relative to the phase-shifting strip line. As the sliding medium is separated from the phase-shifting strip line through the guide rail, and the sliding medium is not contacted with the phase-shifting strip line, friction between the sliding medium and the phase-shifting strip line is avoided in the process that the sliding medium moves relative to the phase-shifting strip line, the resistance of the sliding medium in the process of moving relative to the phase-shifting strip line is reduced, and the service life of the phase-shifting strip line is prolonged. The smoothness of the sliding medium relative to the phase-shifting strip line movement is further improved, the pulling force for driving the sliding medium relative to the phase-shifting strip line movement is reduced, and the requirement for a driving piece for driving the sliding medium relative to the phase-shifting strip line movement is lowered.

Description

Technical Field

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

[0002] With the continuous development of mobile communication networks, users have higher and higher requirements for communication performance. In mobile communication networks, phase shifters are used to adjust the phase distribution of each radiating unit in the antenna to change the radiation coverage and communication quality of the antenna. In an existing phase shifter, the phase shifting strip line is fixed by a fixed frame, and the sliding medium of the phase shifter slides on the fixed frame. During the sliding process, the sliding medium will generate a large sliding resistance with the phase shifting strip line and the fixed frame, which affects the smoothness of the sliding medium during the sliding process. Summary of the invention

[0003] The embodiments of the present application provide a phase shifter and a base station antenna capable of improving the smoothness of a sliding medium during a sliding process.

[0004] In a first aspect, an embodiment of the present application provides a phase shifter, comprising: a fixed frame provided with a guide rail; a phase shifting strip line fixed on the guide rail; and a sliding medium slidably connected to the guide rail, wherein the sliding medium is separated from the phase shifting strip line by the guide rail.

[0005] The sliding medium is slidably connected to the guide rail, and the sliding medium is separated from the phase-shifting strip line by the guide rail. The guide rail can guide the movement of the sliding medium relative to the phase-shifting strip line, which is beneficial to improving the smoothness of the movement of the sliding medium relative to the phase-shifting strip line.

[0006] Since the sliding medium is separated from the phase-shifting belt line by the guide rail, the sliding medium and the phase-shifting belt line do not contact each other. During the movement of the sliding medium relative to the phase-shifting belt line, the sliding medium will not rub against the phase-shifting belt line, thereby reducing the resistance of the sliding medium during the movement relative to the phase-shifting belt line, further improving the smoothness of the movement of the sliding medium relative to the phase-shifting belt line, and also reducing the pulling force driving the sliding medium to move relative to the phase-shifting belt line, which is beneficial to reducing the requirements for the driving component that drives the sliding medium to move relative to the phase-shifting belt line.

[0007] According to the first aspect, in a possible implementation of the present application, the sliding medium includes a first dielectric sheet and a second dielectric sheet that are arranged opposite to each other, the guide rail is located between the first dielectric sheet and the second dielectric sheet, the phase-shifting strip line is located between the first dielectric sheet and the second dielectric sheet, the guide rail is slidably connected to the first dielectric sheet on a side facing the first dielectric sheet, the guide rail is slidably connected to the second dielectric sheet on a side facing the second dielectric sheet, the first dielectric sheet and the phase-shifting strip line are separated by the guide rail, and the second dielectric sheet and the phase-shifting strip line are separated by the guide rail.

[0008] In this possible implementation, when the first dielectric sheet slides along the guide rail relative to the phase-shifting strip line, since the first dielectric sheet is separated from the phase-shifting strip line by the guide rail, there is no friction between the first dielectric sheet and the phase-shifting strip line during the sliding process, thereby reducing the resistance of the first dielectric sheet during the sliding process, thereby reducing the pulling force requirement for the driving member.

[0009] Since the guide rail is located between the first dielectric sheet and the second dielectric sheet, it is equivalent to setting the guide rail inside the sliding medium. Compared with setting the fixed frame outside the first dielectric sheet and the second dielectric sheet, and compared with the situation in the related art where the height of the dielectric sheets in the third direction is the same, the phase shifter provided in the present application will be smaller in the height direction perpendicular to the sliding direction of the first dielectric sheet or the second dielectric sheet, which is beneficial to reducing the height of the guide rail.

[0010] When the second dielectric sheet slides along the guide rail relative to the phase-shifting strip line, since the second dielectric sheet is separated from the phase-shifting strip line by the guide rail, there is no friction between the second dielectric sheet and the phase-shifting strip line during the sliding process, thereby reducing the resistance of the second dielectric sheet during the sliding process, thereby reducing the pulling force requirement for the driving member.

[0011] According to the first aspect, in a possible implementation of the present application, a first sliding hole is provided on a side of the first dielectric sheet facing the phase-shifting strip line, a second sliding hole is provided on a side of the second dielectric sheet facing the phase-shifting strip line, the guide rail is slidably connected to the first sliding hole on a side facing the first dielectric sheet, and the guide rail is slidably connected to the second sliding hole on a side facing the second dielectric sheet.

[0012] In this possible implementation, by providing a first sliding hole on the first dielectric sheet and accommodating the guide rail portion in the first sliding hole of the first dielectric sheet, a sliding connection between the guide rail and the first sliding hole of the first dielectric sheet is achieved, which has a simple structure and is conducive to reducing the manufacturing cost of the phase shifter.

[0013] According to the first aspect, in a possible implementation of the present application, the phase shifter further includes a first ball, the guide rail is provided with a third sliding hole on one side facing the first dielectric sheet, the first ball is partially received in the first sliding hole, the first ball is partially received in the third sliding hole, and the first ball can roll relative to the guide rail.

[0014] In this possible implementation, since the guide rail and the first dielectric sheet are connected via the first ball, the first ball can roll relative to the guide rail along the first sliding hole, thereby converting the sliding friction between the guide rail and the first dielectric sheet into rolling friction, which is beneficial to further reduce the resistance of the first dielectric sheet during sliding relative to the phase-shifting strip line, and further improve the smoothness of the movement of the first dielectric sheet relative to the phase-shifting strip line.

[0015] According to the first aspect, in a possible implementation of the present application, the phase shifter also includes a second ball, a fourth sliding hole is provided on the side of the guide rail facing the second dielectric sheet, the second ball is partially accommodated in the second sliding hole, the second ball is partially accommodated in the fourth sliding hole, and the second ball can roll relative to the guide rail.

[0016] In this possible implementation, since the guide rail and the second dielectric sheet are connected via the second ball, the second ball can roll relative to the guide rail along the second slide hole, thereby converting the sliding friction between the guide rail and the second dielectric sheet into rolling friction, which is beneficial to further reduce the resistance of the second dielectric sheet during sliding relative to the phase-shifting strip line, and further improve the smoothness of the second dielectric sheet when moving relative to the phase-shifting strip line.

[0017] According to the first aspect, in a possible implementation of the present application, the phase shifter further includes a shielding cavity, the fixed frame, the phase shifting strip line, the first dielectric sheet, and the second dielectric sheet are all accommodated in the shielding cavity, and the guide rail is relatively fixed to the shielding cavity.

[0018] In this possible implementation, the shielding cavity has electromagnetic shielding properties, which can serve as a grounding structure for the phase-shifting strip line and simultaneously shield against external signal interference to ensure the transmission of electrical signals in the phase-shifting strip line. That is, the shielding cavity is used as a shielding cavity for the phase-shifting strip line.

[0019] According to the first aspect, in a possible implementation of the present application, a first sliding portion is provided on the inner wall of the shielding cavity facing the first dielectric sheet, a second sliding portion is provided on the side of the first dielectric sheet away from the phase-shifting strip line, and the second sliding portion of the first dielectric sheet is slidably connected to the first sliding portion.

[0020] In this possible implementation, based on the sliding connection between the side of the first dielectric sheet facing the phase-shifting strip line and the guide rail, the side of the first dielectric sheet facing away from the phase-shifting strip line is slidingly connected to the inner wall of the shielding cavity, that is, the sliding of the first dielectric sheet relative to the phase-shifting strip line is guided and limited on both opposite sides of the first dielectric sheet, thereby further improving the smoothness and stability of the sliding of the first dielectric sheet relative to the phase-shifting strip line.

[0021] According to the first aspect, in a possible implementation of the present application, the phase shifter further includes a third ball, the first sliding portion is provided with a fifth sliding hole, the second sliding portion is provided with a sixth sliding hole, the third ball is partially received in the fifth sliding hole, the second ball is partially received in the sixth sliding hole, and the third ball can roll relative to the guide rail

[0022] In this possible implementation, since the first sliding part and the second sliding part are slidably connected via the third ball, the third ball can roll relative to the guide rail. During the movement of the first dielectric sheet relative to the phase-shifting strip line, the third ball rolls relative to the guide rail, converting the static / sliding friction into rolling friction, thereby reducing the resistance of the first dielectric sheet when sliding relative to the phase-shifting strip line, which is beneficial to improving the smoothness of the sliding of the first dielectric sheet relative to the phase-shifting strip line.

[0023] According to the first aspect, in a possible implementation of the present application, a third sliding portion is provided on the inner wall of the shielding cavity facing the second dielectric sheet, a fourth sliding portion is provided on the side of the second dielectric sheet away from the phase-shifting strip line, and the fourth sliding portion of the second dielectric sheet is slidably connected to the third sliding portion.

[0024] In this possible implementation, based on the sliding connection between the side of the second dielectric sheet facing the phase-shifting strip line and the guide rail, the side of the second dielectric sheet facing away from the phase-shifting strip line is slidingly connected to the inner wall of the shielding cavity, that is, the sliding of the second dielectric sheet relative to the phase-shifting strip line is guided and limited on both opposite sides of the second dielectric sheet, further improving the smoothness and stability of the sliding of the second dielectric sheet relative to the phase-shifting strip line.

[0025] According to the first aspect, in a possible implementation of the present application, the phase shifter also includes a fourth ball, the third sliding portion is provided with a seventh sliding hole, the fourth sliding portion is provided with an eighth sliding hole, the fourth ball is partially accommodated in the seventh sliding hole, the fourth ball is partially accommodated in the eighth sliding hole, and the fourth ball can roll relative to the guide rail.

[0026] In this possible implementation, since the third sliding part and the fourth sliding part are slidably connected via the fourth ball, the fourth ball can roll relative to the guide rail. During the movement of the second dielectric sheet relative to the phase-shifting strip line, the fourth ball rolls relative to the guide rail, converting the static / sliding friction into rolling friction, thereby reducing the resistance of the second dielectric sheet when sliding relative to the phase-shifting strip line, which is beneficial to improving the smoothness of the sliding of the second dielectric sheet relative to the phase-shifting strip line.

[0027] According to the first aspect, in a possible implementation manner of the present application, the phase shifter further includes a first bracket, and one end of the guide rail is fixedly connected to the first bracket.

[0028] In this possible implementation, the first bracket is used to support the guide rail to improve the reliability of the guide rail.

[0029] In a second aspect, an embodiment of the present application further provides a base station antenna, comprising a radiation unit and a phase shifter according to the first aspect, wherein the phase shifter is electrically connected to the base station antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of an antenna feeder system provided in one embodiment of the present application;

[0031] Figure 2 An internal architecture diagram of a base station antenna provided in one embodiment of the present application;

[0032] Figure 3 A three-dimensional schematic diagram of a phase shifter provided in the first embodiment of the present application;

[0033] Figure 4 for Figure 3 The three-dimensional exploded schematic diagram of the phase shifter without the shielding cavity is shown;

[0034] Figure 5 It is a three-dimensional assembly diagram of the sliding medium and the fixed frame;

[0035] Figure 6 is a three-dimensional schematic diagram of a first dielectric sheet;

[0036] Figure 7 is a three-dimensional assembly diagram of the first dielectric sheet and the fixed frame;

[0037] Figure 8 A three-dimensional schematic diagram of a partial structure of a phase shifter provided in the second embodiment of the present application;

[0038] Fig. 9 A three-dimensional exploded schematic diagram of a fixed frame, a phase-shifting strip line, and a sliding medium provided in the second embodiment of the present application;

[0039] Fig.10 A three-dimensional assembly diagram of a fixed frame and a phase shifting strip line provided in the second embodiment of the present application;

[0040] Fig.11 A three-dimensional schematic diagram of a first dielectric sheet provided in the second embodiment of the present application;

[0041] Fig.12 A three-dimensional assembly diagram of a partial structure of a phase shifter provided in the third embodiment of the present application;

[0042] Fig.13 for Fig.12 A three-dimensional exploded perspective schematic diagram of a phase shifter shown;

[0043] Fig.14 A side view of a phase shifter provided for a third embodiment;

[0044] Fig.15 It is a three-dimensional schematic diagram of a partial structure of a shielding cavity;

[0045] Fig.16A schematic diagram of a first dielectric sheet provided in the third embodiment, showing a side away from the phase-shifting strip line. DETAILED DESCRIPTION

[0046] An embodiment of the present application provides a base station, including an indoor baseband processing unit (building base bandunit, BBU), a remote radio unit (remote radio unit, RRU) and an antenna feed system, see Figure 1 , Figure 1 A schematic diagram of the structure of an antenna feed system provided in an embodiment of the present application. The radio remote unit is connected between the indoor baseband processing unit and the antenna feed system 500. There can be multiple antenna feed systems 500, and the radio remote units are also multiple in the same number. Each antenna feed system 500 cooperates with a radio remote unit, and multiple antenna feed systems 500 are respectively connected to an indoor baseband processing unit through their corresponding radio remote units to realize the function of sending and receiving wireless signals.

[0047] See also Figure 1 The schematic diagram of the structure of the antenna system 500 is shown. The antenna system 500 includes a base station antenna 400, a pole 502, an antenna bracket 503, a joint seal 504 and a grounding device 501. The pole 502 is fixed relative to the ground, and the antenna bracket 503 is connected between the base station antenna 400 and the pole 502 to achieve a fixed connection between the base station antenna 400 and the pole 502. In some embodiments, the antenna bracket 503 can also be set as an adjustable bracket, which is used to adjust the azimuth and angle of the base station antenna 400 relative to the pole 502, and then cooperate with the signal transmission angle of the base station antenna 400 to ensure that the signal emitted by the antenna system 500 can form a preset downtilt angle with the ground. The base station of the present application can be set in any public place or community to achieve the signal coverage function of its corresponding area.

[0048] The base station antenna 400 is an array antenna, and the base station antenna 400 is also electrically connected to the grounding device 501 to realize the grounding function of the base station antenna 400. The end of the grounding device 501 away from the base station antenna 400 can also be connected and fixed to the holding pole 502, and the grounding function is realized through the holding pole 502. It can be understood that the grounding device 501 can also be directly fixed to the ground to ensure the reliable grounding function of the base station antenna 400. The base station antenna 400 is usually accommodated in a sealed box body (radome), and the box body needs to have sufficient rigidity and anti-fouling, waterproof and other capabilities in terms of mechanical properties to protect the internal components of the base station antenna 400 from the external environment; the electrical properties of the box body need to have good electromagnetic wave penetration characteristics to ensure the signal transceiver function of the base station antenna 400. A joint seal 504 can also be set between the grounding device 501 and the box body of the base station antenna 400. When the grounding device 501 is led out from the base station antenna 400 , it can achieve a sealed connection with the box body of the base station antenna 400 through the joint seal 504 , thereby achieving sealed protection of various components inside the box body of the base station antenna 400 .

[0049] See also Figure 2 , Figure 2 An internal architecture diagram of a base station antenna provided for an embodiment of the present application. Inside the box body of the base station antenna 400 of the present application, a radiation unit 401, a metal reflector 402 and a phase shifter 403 are provided. The radiation unit 401 is located on one side of the metal reflector 402, and forms at least one independent radiation array with the metal reflector 402. The radiation unit 401 is also an antenna vibrator, which is used to transmit or receive radio waves. The frequencies of multiple radiation units 401 in the independent radiation array can be the same or different, and thus correspond to the reception and transmission of radio waves in different frequency bands. When the metal reflector 402 is located on one side of the radiation unit 401, it can reflect the wireless signal and make the wireless signal gather on the radiation unit 401 to enhance the wireless signal received by the radiation unit 401; the metal reflector 402 is also used to reflect the wireless signal at the radiation unit 401 and transmit it outward, so as to enhance the strength of the signal emitted by the radiation unit 401. Furthermore, the metal reflective plate 402 is also used to block or shield the wireless signal from the other side (ie, the opposite direction) of the radiation unit 401 , so as to prevent the wireless signal from the other side from interfering with the radiation unit 401 .

[0050] It can be understood that the phase shifter 403 in the base station antenna 400 is also the phase shifter involved in this application. The phase shifter 403 is electrically connected to the radiation unit 401, and the side of the phase shifter 403 away from the radiation unit 401 is also connected to the antenna interface 406, and is connected to the indoor baseband processing unit of the base station through the antenna interface 406 (not shown in the figure). The indoor baseband processing unit of the base station can be used to generate a signal, which is transmitted to the radiation unit 401 end after the phase distribution of the phase shifter 403 and transmitted to the outside world; or, the indoor baseband processing unit is used to receive the wireless signal transmitted by the radiation unit 401, and the wireless signal is obtained by the phase shifter 403 according to a certain phase processing. Among them, the phase shifter 403 of the present application is used to adjust the phase of the wireless signal, thereby changing the downtilt angle of the wireless signal beam, and then optimizing the communication network. Furthermore, the base station antenna 400 can also be provided with a transmission or calibration network 404, and a combiner or filter 405 and other functional devices, which are used to calibrate the wireless signal, adjust the amplitude of the wireless signal, and other operations. The phase shifter 403, the calibration network 404, and the combiner or filter 405 can form a phase shift network. The phase shift network can be a physical phase shift or a dielectric phase shift.

[0051] See also Figure 3 and Figure 4 , Figure 3 This is a three-dimensional schematic diagram of a phase shifter 403 provided in the first embodiment of the present application. Figure 4 for Figure 3 The phase shifter shown is a three-dimensional exploded schematic diagram without the shielding cavity. The phase shifter 403 may include a shielding cavity 10, a fixed frame 30, a phase-shifting strip line 50 and a sliding medium 70. The fixed frame 30, the phase-shifting strip line 50 and the sliding medium 70 are all contained in the shielding cavity 10. The phase-shifting strip line 50 is fixed on the fixed frame 30. The sliding medium 70 can slide relative to the phase-shifting strip line 50, and then adjust the phase of the phase shifter 403 by changing the electrical length of the phase-shifting strip line 50. Among them, in the phase shifter 403 of the present application, the phase-shifting strip line 50 can be used to realize the function of a power divider. That is, the sliding medium 70 slides relative to the power divider composed of the phase-shifting strip line 50 to change the phase output of the phase shifter 403. It can be understood that in some embodiments, the phase-shifting strip line 50 provided in the present application can also be used as a coupler, an electric modulator or a filter, etc., and is applied to the base station involved in the present application to realize the transmission and / or phase adjustment of microwave wireless signals.

[0052] The shielding cavity 10 has electromagnetic shielding properties, which can serve as a grounding structure for the phase-shifting strip line 50, and at the same time form a shield against external signal interference to ensure the transmission of electrical signals of the phase-shifting strip line 50. That is, the shielding cavity 10 is used as a shielding cavity for the phase-shifting strip line 50. In some embodiments of the present application, the shielding cavity 10 is roughly a rectangular structure, and the shielding cavity 10 includes a first side wall 11, a second side wall 12, and a third side wall 13. The first side wall 11 and the second side wall 12 are arranged opposite to each other along a first direction. The length direction of the first side wall 11 and the length direction of the second side wall 12 are the second direction. The third side wall 13 is connected between the first side wall 11 and the second side wall 12. The first side wall 11 and the second side wall 12 form an opening 113 at an end away from the third side wall 13. The opening 113 and the third side wall 13 are arranged opposite to each other along the third direction. The first direction can be Figure 3 The X direction shown in FIG. , the second direction can be Figure 3 The Y direction shown in the figure, the third direction can be Figure 3 The Z direction shown in . In this embodiment, any two of the first direction, the second direction, and the third direction are perpendicular to each other. It can be understood that the present application does not limit any two of the first direction, the second direction, and the third direction to be perpendicular to each other, and the first direction is different from the second direction, the second direction is different from the third direction, and the first direction is different from the third direction. It can be understood that the present application does not limit the structure of the shielding cavity 10. For example, the shielding cavity 10 can also be a circular shielding cavity, etc. The shielding cavity 10 can also be a closed shielding cavity.

[0053] The fixing frame 30 is received in the shielding cavity 10 and fixed relative to the shielding cavity 10. The fixing frame 30 is made of non-metallic material. The fixing frame 30 is located between the first side wall 11 and the second side wall 12 in the first direction. Figure 5 , Figure 5 It is a three-dimensional assembly diagram of the sliding medium and the fixed frame, and the fixed frame 30 includes a first bracket 31 and a guide rail 33. The first bracket 31 can be fixedly connected to the shielding cavity 10, for example, the first bracket 31 is fixedly connected to at least one of the first side wall 11, the second side wall 12, and the third side wall 13. The first bracket 31 is used to support the guide rail 33. One end or both ends of the guide rail 33 are fixedly connected to the first bracket 31. The guide rail 33 is used to support the phase shifting strip line 50 and to be slidably connected to the sliding medium 70. The first bracket 31 and the guide rail 33 can be set as one body, or the first bracket 31 and the guide rail 33 can be set as a separate body. It can be understood that the first bracket 31 can be omitted, and one end of the guide rail 33 can be directly fixed to the shielding cavity 10, and the guide rail 33 and the shielding cavity 10 can be relatively fixed.

[0054] The phase-shifting strip line 50 is fixed on the guide rail 33. The sliding medium 70 is slidably connected to the guide rail 33, and the sliding medium 70 is separated from the phase-shifting strip line 50 by the guide rail 33. The guide rail 33 can guide the movement of the sliding medium 70 relative to the phase-shifting strip line 50, which is conducive to improving the smoothness of the movement of the sliding medium 70 relative to the phase-shifting strip line 50. Since the sliding medium 70 is separated from the phase-shifting strip line 50 by the guide rail 33, the sliding medium 70 and the phase-shifting strip line 50 are not in contact. During the movement of the sliding medium 70 relative to the phase-shifting strip line 50, the sliding medium 70 will not rub against the phase-shifting strip line 50, which reduces the resistance of the sliding medium 70 during the movement of the phase-shifting strip line 50 relative to the phase-shifting strip line 50, further improves the smoothness of the movement of the sliding medium 70 relative to the phase-shifting strip line 50, and also reduces the pulling force driving the sliding medium 70 to move relative to the phase-shifting strip line 50, which is conducive to reducing the requirements for the driving member driving the sliding medium 70 to move relative to the phase-shifting strip line 50.

[0055] In this embodiment, the phase-shifting strip line 50 is arranged on the guide rail 33 and extends along the guide rail 33. The phase-shifting strip line 50 can be a serpentine line or a straight line. The phase-shifting strip line 50 can be in the form of a microstrip line, a suspended strip line, etc.

[0056] Please refer to Figure 3 , Figure 4 and Figure 6 , Figure 6 1 is a three-dimensional schematic diagram of the first dielectric sheet, and the sliding medium 70 includes a first dielectric sheet 71 and a second dielectric sheet 73 arranged opposite to each other in the first direction. The first dielectric sheet 71 is slidably connected to the side of the guide rail 33 facing the first side wall 11. The first dielectric sheet 71 is located between the first side wall 11 and the phase-shifting strip line 50. Part of the guide rail 33 is located between the first dielectric sheet 71 and the phase-shifting strip line 50, that is, the first dielectric sheet 71 and the phase-shifting strip line 50 are separated by the guide rail 33, and the first dielectric sheet 71 does not contact the phase-shifting strip line 50. The first dielectric sheet 71 can be connected to a driving member. For example, the driving member can be connected to the first dielectric sheet 71 through the opening 113. The driving member is used to drive the first dielectric sheet 71 to move relative to the phase-shifting strip line 50. The driving member can be a driving device such as a motor, a cylinder, or an oil cylinder.

[0057] When the first dielectric sheet 71 slides along the guide rail 33 relative to the phase-shifting strip line 50, since the first dielectric sheet 71 is separated from the phase-shifting strip line 50 by the guide rail 33, there is no friction between the first dielectric sheet 71 and the phase-shifting strip line 50 during the sliding process, thereby reducing the resistance of the first dielectric sheet 71 during the sliding process, thereby reducing the tension requirement for the driving member.

[0058] In some embodiments of this application, please refer to Figure 7 , Figure 73D schematic diagram of the assembly of the first dielectric sheet and the fixed frame. A first sliding hole 711 is provided on the surface of the first dielectric sheet 71 facing the phase shifting strip line 50. A portion of the guide rail 33 on the side facing the first dielectric sheet 71 extends into the first sliding hole 711 of the first dielectric sheet 71 and is slidably connected with the first sliding hole 711. By providing the first sliding hole 711 on the first dielectric sheet 71 and partially accommodating the guide rail 33 in the first sliding hole 711 of the first dielectric sheet 71, the guide rail 33 is slidably connected with the first sliding hole 711 of the first dielectric sheet 71, which has a simple structure and is conducive to reducing the manufacturing cost of the phase shifter 403.

[0059] The second dielectric sheet 73 is arranged opposite to the first dielectric sheet 71. The second dielectric sheet 73 is slidably connected to the side of the guide rail 33 facing the second side wall 12. The second dielectric sheet 73 is located between the second side wall 12 and the phase-shifting strip line 50. Part of the guide rail 33 is located between the second dielectric sheet 73 and the phase-shifting strip line 50, that is, the second dielectric sheet 73 and the phase-shifting strip line 50 are separated by the guide rail 33, and the second dielectric sheet 73 does not contact the phase-shifting strip line 50. The second dielectric sheet 73 can be connected to a driving member, for example, the driving member can be connected to the second dielectric sheet 73 through the opening 113. The driving member is used to drive the second dielectric sheet 73 to move relative to the phase-shifting strip line 50. The driving member can be a driving device such as a motor, a cylinder, or an oil cylinder.

[0060] When the second dielectric sheet 73 slides along the guide rail 33 relative to the phase-shifting strip line 50, since the second dielectric sheet 73 is separated from the phase-shifting strip line 50 by the guide rail 33, there is no friction between the second dielectric sheet 73 and the phase-shifting strip line 50 during the sliding process, thereby reducing the resistance of the second dielectric sheet 73 during the sliding process, thereby reducing the pulling force requirement for the driving member.

[0061] In some embodiments of the present application, a second sliding hole is provided on a surface of the second dielectric sheet 73 facing the phase shifting strip line 50, and a portion of the guide rail 33 on one side facing the second dielectric sheet 73 extends into the second sliding hole of the second dielectric sheet 73 and is slidably connected with the second sliding hole of the second dielectric sheet 73. By providing the second sliding hole on the second dielectric sheet 73 and partially accommodating the guide rail 33 in the second sliding hole of the second dielectric sheet 73, the guide rail 33 is slidably connected with the second sliding hole of the second dielectric sheet 73, which has a simple structure and is conducive to reducing the manufacturing cost of the phase shifter 403.

[0062] In addition, since the guide rail 33 is located between the first medium sheet 71 and the second medium sheet 73, it is equivalent to setting the guide rail 33 inside the sliding medium 70. Compared with the situation in the related art where the height of the medium sheets in the third direction is the same, the height of the guide rail 33 in the third direction is smaller, which is beneficial to reducing the height of the guide rail 33 in the third direction.

[0063] In some embodiments of the present application, the number of guide rails 33 is two, and the two guide rails 33 are arranged at intervals along the third direction. The number of first sliding holes 711 of the first dielectric sheet 71 is at least two, and the number of second sliding holes on the second dielectric sheet 73 is at least two. Each guide rail 33 is slidably connected with the first sliding hole 711 at a corresponding position on the first dielectric sheet 71 and the second sliding hole 731 at a corresponding position on the second dielectric sheet 73. Since the number of guide rails 33 is two, it is beneficial to improve the stability of the first dielectric sheet 71 and the second dielectric sheet 73 when sliding relative to the phase shifting strip line 50. It can be understood that the present application does not limit the number of guide rails 33. For example, the number of guide rails 33 can be at least one, the number of first sliding holes 711 of the first dielectric sheet 71 can be at least one, and the number of second sliding holes of the second dielectric sheet 73 can be at least one.

[0064] See also Figure 8 and Fig. 9 , Figure 8 This is a three-dimensional schematic diagram of a partial structure of a phase shifter provided in the second embodiment of the present application. Fig. 9 This is a three-dimensional exploded schematic diagram of a fixed frame, a phase shifting strip line, and a sliding medium provided in the second embodiment of the present application. The structure of the phase shifter 403 provided in the second embodiment is roughly the same as that of the phase shifter provided in the first embodiment. The difference is at least that the phase shifter 403 provided in the second embodiment also includes a first ball 81 and a second ball 82, and the side of the guide rail 33 facing the first dielectric sheet 71 is also provided with a connection with the first dielectric sheet 71 through the first ball 81, and the side of the guide rail 33 facing the second dielectric sheet 73 is connected to the second dielectric sheet 73 through the second ball 82. The first ball 81 can roll relative to the guide rail 33, and the second ball 82 can roll relative to the guide rail 33.

[0065] Since the side of the guide rail 33 facing the first dielectric sheet 71 is connected to the first sliding hole 711 through the first ball 81, the first ball 81 can roll along the first sliding hole 711 relative to the guide rail 33, thereby converting the sliding friction between the guide rail 33 and the first dielectric sheet 71 into rolling friction, which is beneficial to further reduce the resistance of the first dielectric sheet 71 during sliding relative to the phase-shifting strip line 50, and further improve the smoothness of the first dielectric sheet 71 when moving relative to the phase-shifting strip line 50.

[0066] Since the side of the guide rail 33 facing the second dielectric sheet 73 is connected to the second slide hole through the second ball 82, the second ball 82 can roll along the second slide hole 731 relative to the guide rail 33, thereby converting the sliding friction between the guide rail 33 and the second dielectric sheet 73 into rolling friction, which is beneficial to further reduce the resistance of the second dielectric sheet 73 during the sliding process relative to the phase-shifting strip line 50, and further improve the smoothness of the second dielectric sheet 73 when moving relative to the phase-shifting strip line 50.

[0067] See also Fig.10 , Fig.10 The three-dimensional assembly diagram of the fixed frame and the phase shifting strip line provided in the second embodiment of the present application, the guide rail 33 includes a sliding section 331 and a connecting section 333 that are fixedly connected along the extension direction of the guide rail 33. In the second direction, a third sliding hole is provided on the side of the sliding section 331 facing the first dielectric sheet 71. A fourth sliding hole 3311 is provided on the side of the sliding section 331 facing the second dielectric sheet 73. The width of the sliding section 331 in the third direction is greater than the width of the connecting section 333 in the third direction, which is used to improve the strength of the guide rail 33, thereby improving the reliability of the guide rail 33. It can be understood that the width of the sliding section 331 of the guide rail 33 in the third direction can be less than or equal to the width of the connecting section 333 in the third direction.

[0068] See also Fig.11 , Fig.11 This is a three-dimensional schematic diagram of a first dielectric sheet provided in the second embodiment of the present application. Fig.11 Taking the structure of the first dielectric sheet 71 as an example, the first sliding hole 711 of the first dielectric sheet 71 and the third sliding hole on the side of the guide rail 33 facing the first dielectric sheet 71 are slidably connected through at least one first ball 81. The first ball 81 is partially accommodated in the first sliding hole 711 of the first dielectric sheet 71, and partially accommodated in the third sliding hole of the guide rail 33. In the process of the first dielectric sheet 71 sliding relative to the phase shifting strip line 50, the first ball 81 between the first dielectric sheet 71 and the guide rail 33 rolls in the first sliding hole 711 and the third sliding hole.

[0069] Each first ball 81 is partially accommodated in the corresponding first sliding hole 711 and the third sliding hole. The first sliding hole 711 and the third sliding hole both guide and limit the movement of the first ball 81, thereby reducing the possibility of the first ball 81 detaching from the first dielectric sheet 71 and the guide rail 33, and is also beneficial to improving the stability of the movement of the first dielectric sheet 71 relative to the phase shifting strip line 50.

[0070] The second ball bearing 82 is partially received in the second sliding hole of the second dielectric sheet 73, and partially received in the fourth sliding hole 3311 of the guide rail 33 facing the second dielectric sheet 73. When the second dielectric sheet 73 slides relative to the phase shifting strip line 50, the second ball bearing 82 between the second dielectric sheet 73 and the guide rail 33 rolls in the second sliding hole of the second dielectric sheet 73 and in the fourth sliding hole 3311 of the guide rail 33 facing the second dielectric sheet 73.

[0071] Each second ball 82 is partially accommodated in the corresponding second slide hole and fourth slide hole 3311. The second slide hole and the fourth slide hole 3311 both guide and limit the movement of the second ball 82, thereby reducing the possibility of the second ball 82 detaching from the second dielectric sheet 73 and the guide rail 33, and is also beneficial to improving the stability of the movement of the first dielectric sheet 71 relative to the phase shifting belt line 50.

[0072] It can be understood that the third sliding hole on the guide rail 33 can be omitted, and the first ball 81 is rollingly disposed in the first sliding hole 711 , or the first ball 81 can be rollingly disposed on the guide rail 33 .

[0073] It can be understood that the first slide hole 711 on the first dielectric sheet 71 can be omitted, and the first ball 81 is rollingly arranged in the third slide hole on the side of the guide rail 33 facing the first dielectric sheet 71, or the first ball 81 can be rollingly arranged on the side of the first dielectric sheet 71 facing the guide rail 33.

[0074] It can be understood that the fourth sliding hole 3311 on the guide rail 33 can be omitted, and the second ball 82 is rollingly disposed in the second sliding hole, or the second ball 82 can be rollingly disposed on the guide rail 33.

[0075] It can be understood that the second slide hole on the second dielectric sheet 73 can be omitted, and the second ball 82 is rollingly arranged in the fourth slide hole 3311 on the side of the guide rail 33 facing the second dielectric sheet 73, or the second ball 82 can be rollingly arranged on the side of the second dielectric sheet 73 facing the guide rail 33.

[0076] See also Fig.12 , Fig.13 and Fig.14 , Fig.12 This is a three-dimensional assembly diagram of a partial structure of a phase shifter provided in the third embodiment of the present application. Fig.13 for Fig.12 A three-dimensional exploded perspective view of a phase shifter shown in FIG. Fig.14 This is a side view of the phase shifter provided in the third embodiment. The structure of the phase shifter 403 provided in the third embodiment is substantially the same as that of the phase shifter provided in the second embodiment. The difference lies in that, in the phase shifter 403 provided in the third embodiment, the inner wall of the shielding cavity 10 is slidably connected to the side of the first dielectric sheet 71 facing away from the phase shift strip line 50, and the inner wall of the shielding cavity 10 is slidably connected to the side of the second dielectric sheet 73 facing away from the phase shift strip line 50.

[0077] On the basis that the side of the first dielectric sheet 71 facing the phase-shifting strip line 50 is slidably connected to the guide rail 33, the side of the first dielectric sheet 71 facing away from the phase-shifting strip line 50 is slidably connected to the inner wall of the shielding cavity 10, that is, the sliding of the first dielectric sheet 71 relative to the phase-shifting strip line 50 is guided and limited on both sides of the first dielectric sheet 71 along the second direction, thereby further improving the smoothness and stability of the sliding of the first dielectric sheet 71 relative to the phase-shifting strip line 50.

[0078] On the basis that the side of the second dielectric sheet 73 facing the phase-shifting strip line 50 is slidably connected to the guide rail 33, the side of the second dielectric sheet 73 facing away from the phase-shifting strip line 50 is slidably connected to the inner wall of the shielding cavity 10, that is, the sliding of the second dielectric sheet 73 relative to the phase-shifting strip line 50 is guided and limited on both sides of the second dielectric sheet 73 along the second direction, further improving the smoothness and stability of the sliding of the second dielectric sheet 73 relative to the phase-shifting strip line 50.

[0079] See also Fig.15 and Fig.16 , Fig.15 It is a three-dimensional schematic diagram of part of the structure of the shielding cavity. Fig.16 A schematic diagram of the side of the first dielectric sheet away from the phase-shifting strip line provided in the third embodiment, a first sliding portion 115 is provided on the inner wall of the first side wall 11 of the shielding cavity 10 facing the first dielectric sheet 71, a second sliding portion 715 is provided on the side of the first dielectric sheet 71 away from the phase-shifting strip line 50, and the first sliding portion 115 of the first side wall 11 is slidably connected with the second sliding portion 715 of the first dielectric sheet 71. The phase shifter 403 further includes a third ball 83, and the first sliding portion 115 of the first side wall 11 is slidably connected with the second sliding portion 715 of the first dielectric sheet 71 through the third ball 83. The third ball 83 can roll relative to the guide rail 33.

[0080] Since the first sliding part 115 is slidably connected to the second sliding part 715 via the third ball bearing 83, the third ball bearing 83 can roll relative to the guide rail 33. During the movement of the first dielectric sheet 71 relative to the phase-shifting strip line 50, the third ball bearing 83 rolls relative to the guide rail 33, converting the sliding friction into rolling friction, thereby reducing the resistance of the first dielectric sheet 71 when sliding relative to the phase-shifting strip line 50, which is beneficial to improving the smoothness of the sliding of the first dielectric sheet 71 relative to the phase-shifting strip line 50.

[0081] In this embodiment, the first sliding portion 115 and the second sliding portion 715 are waist-shaped guide rails, and each first sliding portion 115 is provided with a fifth sliding hole 1151 (such as Fig.15 Each second sliding portion 715 is provided with a sixth sliding hole 7151 (as shown in Fig.16 As shown in FIG. 1 , the extension direction of the fifth sliding hole 1151 and the sixth sliding hole 7151 is the same as the extension direction of the guide rail 33. Each third ball 83 is partially received in the corresponding fifth sliding hole 1151, and each third ball 83 is partially received in the corresponding sixth sliding hole 7151.

[0082] Each third ball 83 is partially accommodated in the corresponding fifth slide hole 1151 and the corresponding sixth slide hole 7151. The fifth slide hole 1151 and the corresponding sixth slide hole 7151 both guide and limit the movement of the third ball 83, thereby reducing the possibility of the third ball 83 detaching from the first dielectric sheet 71 and the guide rail 33, and is also beneficial to improving the stability of the movement of the first dielectric sheet 71 relative to the phase shifting band line 50.

[0083] A third sliding portion 125 is provided on the inner wall of the second side wall 12 of the shielding cavity 10 facing the second dielectric sheet 73, and a fourth sliding portion 735 is provided on the side of the second dielectric sheet 73 away from the phase shifting strip line 50, and the third sliding portion 125 of the second side wall 12 is slidably connected with the fourth sliding portion 735 of the second dielectric sheet 73. The phase shifter 403 further includes a fourth ball 84, and the third sliding portion 125 of the second side wall 12 is slidably connected with the fourth sliding portion 735 of the second dielectric sheet 73 through the fourth ball 84. The fourth ball 84 can roll relative to the guide rail 33.

[0084] Since the third sliding part 125 and the fourth sliding part 735 are slidably connected via the fourth ball bearing 84, the fourth ball bearing 84 can roll relative to the guide rail 33. During the movement of the second dielectric sheet 73 relative to the phase-shifting strip line 50, the fourth ball bearing 84 rolls relative to the guide rail 33, converting the sliding friction into rolling friction, thereby reducing the resistance of the second dielectric sheet 73 when sliding relative to the phase-shifting strip line 50, which is beneficial to improving the smoothness of the sliding of the second dielectric sheet 73 relative to the phase-shifting strip line 50.

[0085] In this embodiment, the third sliding part 125 and the fourth sliding part 735 are waist-shaped guide rails, each third sliding part 125 is provided with a seventh sliding hole 1251, each fourth sliding part 735 is provided with an eighth sliding hole 7351, and the extension direction of the seventh sliding hole 1251 and the eighth sliding hole 7351 is the same as the extension direction of the guide rail 33. Each fourth ball 84 is partially received in the corresponding seventh sliding hole 1251, and each fourth ball 84 is partially received in the corresponding eighth sliding hole 7351.

[0086] Each fourth ball 84 is partially accommodated in the corresponding seventh slide hole 1251 and the corresponding eighth slide hole 7351. The seventh slide hole 1251 and the corresponding eighth slide hole 7351 both guide and limit the movement of the fourth ball 84, thereby reducing the possibility of the fourth ball 84 detaching from the second dielectric sheet 73 and the guide rail 33, and is also beneficial to improving the stability of the movement of the second dielectric sheet 73 relative to the phase shifting belt line 50.

[0087] It can be understood that in some possible implementations, the third ball bearing 83 can be omitted, one of the first sliding part 115 and the second sliding part 715 can be a sliding hole, and the other of the first sliding part 115 and the second sliding part 715 can be a sliding rail, and the sliding rail is slidably connected to the sliding hole.

[0088] It can be understood that in some possible implementations, the fourth ball 84 can be omitted, one of the third sliding part 125 and the fourth sliding part 735 can be a sliding hole, and the other of the third sliding part 125 and the fourth sliding part 735 can be a sliding rail, and the sliding rail is slidably connected to the sliding hole.

[0089] It can be understood that the present application does not limit the sliding connection method between the shielding cavity 10 and the sliding medium 70 .

[0090] It can be understood that the first to third embodiments of the present application can be used in combination with each other without conflict or contradiction.

[0091] It should be understood that expressions such as "including" and "may include" that may be used in the present application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In the present application, terms such as "including" and / or "having" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components, or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0092] In addition, in the present application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.

[0093] In the present application, expressions including ordinal numbers such as "first" and "second" may modify various elements. However, such elements are not limited by the above expressions. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used to distinguish one element from other elements. For example, a first user device and a second user device indicate different user devices, although the first user device and the second user device are both user devices. Similarly, without departing from the scope of the present application, a first element may be referred to as a second element, and similarly, a second element may also be referred to as a first element.

[0094] When a component is referred to as being "connected" or "accessed" to another component, it should be understood that the component is not only directly connected to or accessed to the other component, but also another component may exist between the component and the other component. On the other hand, when a component is referred to as being "directly connected" or "directly accessed" to another component, it should be understood that there is no component between them.

[0095] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A phase shifter, characterized in that: The phase shifter comprises: A fixed frame provided with guide rails; A phase shifting strip line fixed on the guide rail; A sliding medium is slidably connected to the guide rail, and the sliding medium is separated from the phase shifting strip line by the guide rail.

2. The phase shifter according to claim 1, characterized in that: The sliding medium includes a first dielectric sheet and a second dielectric sheet arranged opposite to each other, the guide rail is located between the first dielectric sheet and the second dielectric sheet, and the phase shifting strip line is located between the first dielectric sheet and the second dielectric sheet. The guide rail is slidably connected to the first dielectric sheet on one side thereof facing the first dielectric sheet, and is slidably connected to the second dielectric sheet on one side thereof facing the second dielectric sheet. The first dielectric sheet and the phase-shifting strip line are separated by the guide rail, and the second dielectric sheet and the phase-shifting strip line are separated by the guide rail.

3. The phase shifter according to claim 2, characterized in that: A first sliding hole is provided on a side of the first dielectric sheet facing the phase-shifting strip line, a second sliding hole is provided on a side of the second dielectric sheet facing the phase-shifting strip line, the guide rail is slidably connected to the first sliding hole on a side facing the first dielectric sheet, and the guide rail is slidably connected to the second sliding hole on a side facing the second dielectric sheet.

4. The phase shifter according to claim 3, characterized in that: The phase shifter further includes a first ball. A third sliding hole is provided on a side of the guide rail facing the first dielectric sheet. The first ball is partially received in the first sliding hole. The first ball can roll relative to the guide rail.

5. The phase shifter according to claim 3, characterized in that: The phase shifter further includes a second ball. A fourth sliding hole is provided on a side of the guide rail facing the second dielectric sheet. The second ball is partially received in the second sliding hole. The second ball can roll relative to the guide rail.

6. The phase shifter according to claim 2, characterized in that: The phase shifter further includes a shielding cavity, the fixing frame, the phase shifting strip line, the first dielectric sheet, and the second dielectric sheet are all accommodated in the shielding cavity, and the guide rail is relatively fixed to the shielding cavity.

7. The phase shifter according to claim 6, characterized in that: A first sliding portion is provided on the inner wall of the shielding cavity facing the first dielectric sheet, a second sliding portion is provided on a side of the first dielectric sheet away from the phase shifting strip line, and the second sliding portion of the first dielectric sheet is slidably connected to the first sliding portion.

8. The phase shifter according to claim 7, characterized in that The phase shifter also includes a third ball, the first sliding part is provided with a fifth sliding hole, the second sliding part is provided with a sixth sliding hole, the third ball is partially accommodated in the fifth sliding hole, the third ball is partially accommodated in the sixth sliding hole, and the third ball can roll relative to the guide rail.

9. The phase shifter according to claim 6, characterized in that: A third sliding portion is provided on the inner wall of the shielding cavity facing the second dielectric sheet, a fourth sliding portion is provided on the side of the second dielectric sheet away from the phase shifting strip line, and the fourth sliding portion of the second dielectric sheet is slidably connected to the third sliding portion.

10. The phase shifter according to claim 9, characterized in that The phase shifter also includes a fourth ball, the third sliding portion is provided with a seventh sliding hole, the fourth sliding portion is provided with an eighth sliding hole, the fourth ball is partially accommodated in the seventh sliding hole, the fourth ball is partially accommodated in the eighth sliding hole, and the fourth ball can roll relative to the guide rail.

11. The phase shifter according to any one of claims 1 to 10, characterized in that: The fixed frame further includes a first bracket, and one end of the guide rail is fixedly connected to the first bracket.

12. A base station antenna, characterized in that: The base station antenna comprises a radiation unit and a phase shifter according to any one of claims 1 to 11, and the phase shifter is electrically connected to the base station antenna.

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