CN116154430A

CN116154430A - Phase shifter, base station antenna and base station

Info

Publication number: CN116154430A
Application number: CN202111387422.5A
Authority: CN
Inventors: 郑颜; 金莉; 卢俊锋; 王重阳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2023-05-23

Abstract

The application provides a phase shifter, a base station antenna and a base station. The phase shifter comprises a main body and a suspension strip line, wherein the main body comprises a containing cavity, the suspension strip line is contained in the containing cavity, and the suspension strip line comprises a main feeder line, a power dividing junction, an output feeder line and a filtering structure; the one end of main feeder is the input, the other end is connected with the merit branch knot, the output feeder is connected to the other end of merit branch knot, the output feeder includes two at least output, every output all keeps away from the merit branch knot, the main feeder includes the suspension section, the filtering structure is including locating the gap that opens a way on the suspension section, the gap that opens a way runs through the suspension section in the thickness direction of suspension section, and divide into parallel arrangement's transmission band and open circuit area with the suspension section width direction with the suspension section, the length direction of open circuit area and transmission band is the same with the length direction of suspension section, wherein, the one end and the transmission band of open circuit area are connected, the other end is unsettled in acceping the intracavity. The method and the device realize miniaturized filtering, avoid introducing passive intermodulation risks and ensure communication quality.

Description

Phase shifter, base station antenna and base station

Technical Field

The present application relates to the field of communications technologies, and in particular, to a phase shifter, a base station antenna, and a base station.

Background

The phase shifter is an important component of the base station antenna for adjusting the orientation of the nodding beam of the base station antenna to meet the needs of network coverage or network optimization. With the increasing number of multi-frequency antennas, in the design of a base station antenna, a filter is usually required to be externally arranged outside a phase shifter in a screw or welding mode by using a cable so as to realize filtering, thereby ensuring that all frequency bands do not interfere with each other and further increasing the isolation of different frequencies. However, the design not only can influence the communication quality due to the risk of introducing passive intermodulation (Passive Intermodulation, PIM) by the screws or welding spots, but also can increase extra insertion loss due to the introduction of an external filter, thereby reducing the radiation efficiency of the base station antenna.

Disclosure of Invention

The application provides a phase shifter, a base station antenna and a base station, which realize miniaturized filtering, avoid introducing passive intermodulation risks and ensure communication quality.

An embodiment of the present application provides a phase shifter, where the phase shifter includes a main body and a suspension strip line, the main body includes a housing cavity, the suspension strip line is housed in the housing cavity, and the suspension strip line includes a main feeder line, a power division junction, an output feeder line and a filtering structure;

The one end of main feeder is the input, the other end is connected with the merit branch knot, the output feeder is connected to the other end of merit branch knot, the output feeder includes two at least output, every output all keeps away from the merit branch knot, the main feeder includes the suspension section, the filtering structure is including locating the gap that opens a way on the suspension section, the gap that opens a way runs through the suspension section in the thickness direction of suspension section, and divide into parallel arrangement's transmission band and open circuit area with the suspension section width direction with the suspension section, the length direction of open circuit area and transmission band is the same with the length direction of suspension section, wherein, the one end and the transmission band of open circuit area are connected, the other end is unsettled in acceping the intracavity.

The phase shifter integrates a filtering function by arranging the open-circuit slot on the suspension section of the main feeder line, and realizes specific frequency band filtering (namely removing interference signals). The design of the open-circuit gap has simple structure, greatly reduces the filtering cost of the phase shifter, does not increase the size of the main feeder line, has high space utilization rate, is beneficial to the layout of the main feeder line in the accommodating cavity (namely in the main body), is beneficial to the miniaturization of the main body, and is further beneficial to the miniaturization of the phase shifter. Therefore, the phase shifter can be applied to the same small-sized, miniature or smaller base station antenna as the existing phase shifter which is not integrated with the filtering function, and is convenient for integration. In addition, when the phase shifter is integrated in the base station antenna, the different frequency isolation of the base station antenna can be effectively improved, and the communication quality of the base station antenna is improved; compared with the prior art, the design of the open-circuit gap not only effectively avoids the passive intermodulation risk introduced by the increase of screws or welding spots, but also improves the communication quality; in addition, the extra insertion loss caused by the external filter is avoided, and the radiation efficiency of the base station antenna is improved.

In one embodiment, the path length of the open slot is between one eighth and one quarter of the filtered wavelength. The filtered wavelength refers to the wavelength of the signal (i.e., the interference signal) that is filtered out by the open-circuit slit. The user can adjust the wavelength range of signals filtered by the open-circuit gap through adjusting the path length of the open-circuit gap, so that the user can conveniently filter unnecessary signals, the adjustment is simple, the adjustment cost is low, and the processing cost of the phase shifter is reduced. In this embodiment, the path length of the open slot is one sixth of the filtered wavelength.

In one embodiment, the open slot includes a first section and a second section, the first section extends along a length direction of the suspension section, the second section is communicated with one end of the first section away from the input end, and the second section extends along a width direction of the suspension section and penetrates through a side edge of the suspension section to be communicated with the accommodating cavity. At this time, the path length of the open slit refers to the sum of the lengths of the first and second segments. Therefore, the user can adjust the wavelength range of the signals filtered by the open-circuit slit by adjusting the length of the first section and/or the second section, and the adjustment is simple; and because the first section and the second section are all banded gaps, the structure is simple, the processing is easy, and the processing cost is reduced. It can be appreciated that when the length of the second segment is smaller than that of the first segment, the length of the second segment 2612 is negligible, and at this time, the user can quickly confirm the length of the first segment according to the wavelength range of the signal to be filtered, thereby reducing the adjustment difficulty and the processing cost.

In one embodiment, the open slot comprises a first section, a second section, a third section and a fourth section which are connected end to end in sequence, wherein the first section and the third section extend along the width direction of the suspension section, and the second section and the fourth section extend along the length direction of the suspension section; wherein, the one end that first section kept away from the second section runs through the suspension section along the width direction of suspension section. The user can adjust the wavelength range of the signals filtered by the open-circuit slit by adjusting the lengths of the first section, the second section, the third section and the fourth section.

In one embodiment, the number of the open slots is a plurality, the open slots are arranged on the main feed line at intervals, and the path lengths of the open slots are different. Because the path lengths of the open-circuit slits are different, the open-circuit slits can filter out signals in different wavelength ranges respectively. This effectively increases the operating bandwidth of the phase shifter.

In one embodiment, the filtering structure comprises a fixing frame, the main feeder line is fixed and suspended in the accommodating cavity, the fixing frame is accommodated in the accommodating cavity and detachably connected with the suspension section, and the fixing frame is used for limiting the transmission belt and the open-circuit belt. The width of the open-circuit gap can be limited by fixing the limit transmission belt and the open-circuit belt. Therefore, the condition that the width of the open-circuit gap is changed is effectively avoided, the open-circuit gap can be ensured to be stably and reliably loaded with parasitic capacitance, and further the open-circuit gap can be ensured to be capable of stably filtering signals.

In one embodiment, the fixing frame comprises a limiting body, the limiting body is located in the open-circuit gap, and the limiting body is abutted against the side face, facing the open-circuit gap, of the transmission belt and the open-circuit belt. The limit body is abutted against the transmission belt and the open-circuit belt, so that the width of the open-circuit gap is not changed, and the open-circuit gap is ensured to be capable of stably filtering signals.

In one embodiment, the fixing frame comprises a frame body, wherein the limiting body is convexly arranged on the surface of the frame body facing the suspension section, opposite end parts of the frame body in the thickness direction of the suspension section are respectively abutted against the cavity wall of the accommodating cavity, and opposite end parts in the width direction of the suspension section are respectively abutted against the cavity wall of the accommodating cavity. Like this, the support body is spacing in the thickness direction and the width direction of suspension section, and then carries out further spacing in the thickness direction and the width direction of suspension section to the suspension section with support body fixed connection, and the support body plays the effect of further supporting to the suspension section, further avoids suspension section to take place to contact with the chamber wall of acceping the chamber, further guarantees that the suspension section can stably suspend in acceping the chamber, has improved the stability of shifter inner structure.

In one embodiment, the fixing frame comprises a plurality of buckles, a plurality of clamping grooves are respectively arranged on two sides of the transmission belt and the open circuit belt in the width direction of the suspension section, and the plurality of buckles are in one-to-one corresponding clamping connection with the plurality of clamping grooves. Through the connection of buckle and draw-in groove, transmission band and open circuit area all can be steadily firmly with mount fixed connection, just can avoid transmission band and open circuit area to take place relative deflection or rock through the mount, guarantee that the width in gap of opening a way does not change, guarantee that the gap of opening a way can filter the signal steadily. And the design structure of the buckle and the clamping groove is simple and stable, the processing is easy, and the processing cost is low.

In this embodiment, a plurality of first clamping grooves are respectively arranged on one side of the transmission belt and the open-circuit belt, which is away from the open-circuit gap, a plurality of second clamping grooves are respectively arranged on one side of the transmission belt and the open-circuit belt, which is towards the open-circuit gap, the plurality of buckles comprise a plurality of first buckles and a plurality of second buckles, and each first buckle is inserted into a gap between a cavity wall of the accommodating cavity and the transmission belt or the open-circuit belt along the thickness direction of the suspension section and is correspondingly clamped with the first clamping groove; each second buckle is inserted into the open-circuit gap along the thickness direction of the suspension section and is correspondingly clamped with the second clamping groove. Through the cooperation of first buckle and first draw-in groove and second buckle and second draw-in groove be connected, transmission band and open circuit area all with mount fixed connection to the transmission band passes through relatively fixed with the open circuit area and realizes with the mount, stable in structure and simple, low in processing cost. The transmission belt and the open-circuit belt can be prevented from deflecting or swinging relatively through the fixing frame, the width of the open-circuit gap is not changed, the width of the open-circuit gap is further guaranteed through the second buckle inserted into the open-circuit gap, the open-circuit gap can be guaranteed to load parasitic capacitance stably and reliably, and further signals can be filtered out stably through the open-circuit gap.

In one embodiment, the fixing frame comprises a frame body, the suspension section is provided with limiting holes penetrating through the suspension section, the limiting holes are positioned on two opposite sides of the open-circuit gap, the frame body is provided with protrusions or fixing buckles corresponding to the limiting holes, and the protrusions or the fixing buckles are clamped in the limiting holes. The frame body can be stably and firmly fixedly connected with the suspension section through the cooperation of the fixing buckles, the protruding points and the limiting holes, and further the frame body is prevented from shaking or even moving relative to the suspension section. In addition, the design of the fixing buckle and the convex points is simple in structure, low in processing cost and convenient to assemble and disassemble.

In one embodiment, the main feeder further comprises a first connecting section and a second connecting section, one end of the first connecting section is electrically connected with the transmission belt of the suspension section, the other end of the first connecting section is connected with the second connecting section, the other end of the second connecting section is connected with the power division junction, one end of the open-circuit belt is connected with the transmission belt, and the other end of the open-circuit belt is arranged at intervals with the transmission belt through an open-circuit gap.

In this embodiment, the suspension section includes a first portion, a second portion and a third portion, opposite ends of the second portion in a length direction of the suspension section are connected with the first portion and the third portion, an end portion of the third portion, which is far away from the second portion, is connected with the first connection section, an end portion of the first portion, which is far away from the second portion, is an input end, an open slot is formed in the second portion to divide the second portion into a transmission belt and an open belt, the transmission belt is connected with the first portion and the third portion, an end portion of the open belt, which is close to the input end, is connected with the transmission belt, and the other end portion is spaced from the transmission belt. In other embodiments, the end of the open-circuit tape remote from the input end may be connected to the conveyor belt.

In other embodiments, the open slot may divide the entire suspension section into a transmission belt and an open belt in the width direction of the suspension section, one end of the transmission belt is connected to the first connection section, the end of the transmission belt away from the first connection section is an input end, one end of the open belt is connected to the transmission belt, and the other end is spaced from the transmission belt.

In one embodiment, a connecting hole is formed in one end, close to the power division junction, of the second connecting section, and an inserting end is convexly arranged on the power division junction and inserted into the connecting hole, so that the main feeder line is connected with the power division junction. The structure is stable and simple, the processing cost is low, the disassembly and the assembly are convenient, and the stability of the internal structure of the phase shifter is ensured.

In one embodiment, the accommodating cavity comprises a main cavity and an auxiliary cavity, the main cavity and the auxiliary cavity extend along the length direction of the suspension section, the auxiliary cavity is positioned at one side of the main cavity and is communicated with the main cavity along the thickness direction of the suspension section, the input end is positioned at one side of the main cavity far away from the auxiliary cavity, the main feeder line extends from the main cavity to the auxiliary cavity, and the power dividing junction and the output feeder line are positioned in the auxiliary cavity; wherein the suspension section is located in the main chamber. The design of the main cavity and the auxiliary cavity is beneficial to reducing the length of the main body, improving the space utilization rate and further being beneficial to the miniaturization development of the phase shifter.

In one embodiment, the phase shifter further comprises a phase shifting unit, the phase shifting unit is located in the accommodating cavity, and the phase shifting unit moves relative to the output feeder line so as to adjust the phase between the output end and the power division junction. The phase between the output end and the power division junction can be continuously adjusted by controlling the movement of the phase shifting unit, so that the adjustment of a user is facilitated.

In one embodiment, the phase shifting unit is a dielectric body, the phase shifting unit covers the output feeder line, and the phase shifting unit moves relative to the output feeder line to adjust the area of the output feeder line covered by the phase shifting unit. The equivalent dielectric constant of the output feeder line is changed by adjusting the area of the output feeder line covered by the phase shifting unit, so that the phase between the output end and the power dividing junction is changed.

In this embodiment, the number of the phase shift units is one, the output feeder line includes a first output section and a second output section, one ends of the first output section and the second output section are connected with the power division junction, the other ends are output ends respectively, the first output section and the second output section are arranged along the length direction of the suspension section, and the phase shift units cover the first output section, the second output section and the power division junction. The phase shifting unit can simultaneously and continuously change the area of the first output section and the second output section covered by the phase shifting unit along the length direction of the suspension section, and further can simultaneously and continuously adjust the equivalent dielectric constants of the first output section and the second output section, so that the phase of the power division junction to the two output ends can simultaneously and continuously change, and further the phase of the two output ends to the power division junction can be simultaneously changed.

In other embodiments, the number of phase shifting units may also correspond to the number of output ends, where each phase shifting unit is disposed on one side or both sides of an output section between one output end and a power division junction and covers the output section, and each phase shifting unit moves relative to the output feeder line to adjust an area covered by the corresponding output section by the phase shifting unit, thereby changing phases from different output ends to the power division junction.

A second aspect of an embodiment of the present application provides a base station antenna, including: the phase shifter and the antenna of any one of the first aspect of the present application, wherein the output end is electrically connected with the antenna.

In this embodiment, the antenna includes an antenna panel and a plurality of radiating elements; wherein the frequencies of the radiating elements may or may not be the same. The radiation unit is used for converting the radio frequency signal into an electromagnetic wave signal and radiating the electromagnetic wave signal; or receives an electromagnetic wave signal and converts it into a radio frequency signal. The antenna performs its function of radiating or receiving electromagnetic wave signals through the radiating element. The plurality of radiating units are arranged on the antenna panel, and the antenna panel is used for enhancing the directivity of the antenna. The output end of the phase shifter is electrically connected with the radiation units, the phase shifter enables the output signals to form continuous linear phase difference by moving the phase shifting units in the phase shifter, and the signals are transmitted to each radiation unit, so that the phase of each radiation unit is changed, and the purpose of adjusting the electric downtilt angle of the base station antenna is achieved.

A third aspect of the embodiments of the present application provides a base station, which is characterized by comprising the base station antenna of the second aspect of the present application and a base station server, where the base station server is electrically connected to the base station antenna. The base station server is used for outputting or receiving radio frequency signals. The base station server is electrically connected with the input end.

The phase shifter has the phase shifting function and the filtering function, when the phase shifter receives signals transmitted from the base station server, the phase shifter carries out specific frequency band filtering (namely removing interference waves) on the signals through the open-circuit gaps, then carries out phase shifting treatment on the signals, and then conveys the signals to each radiating unit of the antenna so as to adjust the electric downtilt angle of the electromagnetic wave beam of the base station antenna, thereby effectively reducing the interference of unnecessary signals to the radiating units, further ensuring that each frequency band of the base station antenna is not interfered, improving the different-frequency isolation degree and improving the communication quality of the base station antenna. Compared with the scheme of improving the different frequency isolation of the external filter of the phase shifter, the phase shifter integrating the filtering function and the phase shifting function not only reduces the number of screws or welding spots and the passive intermodulation risk, improves the communication quality of the base station antenna, but also avoids the addition of extra insertion loss caused by the external filter and effectively improves the radiation efficiency of the base station antenna. In addition, compared with the original phase shifter with the phase shifting function, the phase shifter has the advantages that after integrating the phase shifting function and the filtering function, the whole size and the internal space volume of the phase shifter are not increased. Therefore, with the development of miniaturization of the base station antenna, the phase shifter can always integrate the filtering function on the basis of guaranteeing the phase shifting function of the phase shifter, and is beneficial to miniaturization of the base station antenna.

Drawings

In order to more clearly describe the technical solutions in the embodiments or the background of the present application, the following description will describe the drawings that are required to be used in the embodiments or the background of the present application.

Fig. 1 is a schematic structural diagram of a base station according to an embodiment of the present application;

fig. 2 is a block diagram of a base station antenna of the base station shown in fig. 1;

fig. 3 is a schematic side view of a phase shifter of the base station antenna shown in fig. 2;

fig. 4 is a schematic side view of the phase shifter shown in fig. 3 with the phase shifting element omitted;

FIG. 5 is another angular block diagram of a main feed line portion (with support means omitted) of the phase shifter shown in FIG. 4;

fig. 6 is an enlarged view of a portion VIII (with the holder omitted) of the main feeder line portion in the phase shifter shown in fig. 5;

FIG. 7 is an enlarged view of a portion VIII of the main feed line portion of the phase shifter shown in FIG. 5;

FIG. 8 is an enlarged view of another embodiment of a portion VIII (with the mount omitted) of the main feed line portion of the phase shifter shown in FIG. 5;

FIG. 9 is a schematic diagram of another embodiment of a main feed line portion of the phase shifter shown in FIG. 5;

fig. 10 is an enlarged view of an X portion of the phase shifter shown in fig. 4.

Detailed Description

The phase shifter of the embodiment of the application is applied to a base station antenna, and the base station antenna is applied to a base station. A base station is a device deployed in a radio access network to provide wireless communication functionality. In this application, connecting component a to component B means that component a is both electrically connected to component B and physically connected to component B.

Embodiments of the present application are described below with reference to the accompanying drawings in the embodiments of the present application.

Referring to fig. 1, in the present embodiment, a base station 1000 includes a base station server 400 and an antenna feeder system. The base station server 400 is located indoors, which is beneficial to protecting the base station server 400 and improving the service life of the base station server 400. The base station server 400 is used to output or receive radio frequency signals. The base station server 400 is electrically connected to the antenna feeder system. The antenna feed system is used for radiating radio frequency signals output by the base station server 400 in the form of electromagnetic waves; or receives an external electromagnetic wave signal, converts it into a radio frequency signal, and transmits it to the base station server 400.

In this embodiment, the antenna feeder system includes a base station antenna 200, a pole 302, an adjusting bracket 303, a cable 304, at least one grounding device 305, a lightning protection device 306, and a sealing member. The base station antenna 200 is a plate-shaped multi-frequency antenna. It is to be understood that the base station antenna 200 may be any of various antenna elements such as a line antenna, a plane antenna, and a booster antenna. The number of the base station antennas 200 is one, or the number of the base station antennas 200 may be more than one. The base station antenna 200 is used to radiate or receive electromagnetic wave signals. Specifically, the base station antenna 200 converts the radio frequency signal into an electromagnetic wave signal and radiates it in the form of an electromagnetic beam; alternatively, an electromagnetic wave signal is received and converted into a radio frequency signal. The base station antenna 200 is located outdoors, so that interference caused by shielding of walls, roofs and the like is avoided, and the capability of the base station antenna 200 for radiating or receiving electromagnetic wave signals is improved.

Holding pole 302 is secured to a load bearing surface such as the ground, floor, etc. The adjustment bracket 303 is detachably attached to the pole 302. Base station antenna 200 is fixed to an adjustment bracket 303, and is further fixed to pole 302 via adjustment bracket 303. The adjusting bracket 303 is also used to adjust the mechanical downtilt of the base station antenna 200 in order to adjust the pointing direction of the electromagnetic beam of the base station antenna 200, thereby adjusting the coverage of the electromagnetic wave signal of the base station antenna 200. Cable 304 is used to enable signal transmission between base station antenna 200 and base station server 400.

In this embodiment, the adjusting bracket 303 includes a first bracket 3031 and a second bracket 3032, the first bracket 3031 and the second bracket 3032 are detachably mounted on the holding pole 302, the first bracket 3031 and the second bracket 3032 support the base station antenna 200 together, and the second bracket 3032 is farther away from a bearing surface such as the ground or the floor than the first bracket 3031, and by adjusting the second bracket 3032, one end of the base station antenna 200 connected to the second bracket 3032 is controlled to be close to or far away from the holding pole 302, so as to adjust a mechanical downtilt angle of the base station antenna 200. The "first" and "second" are for convenience of description only and should not be construed as limiting the present application. The mechanical downtilt angle refers to an angle that the opening of the base station antenna 200 is oriented downward due to the inclination with respect to the vertical direction.

One end of the cable 304 is connected to the base station antenna 200, the other end of the cable 304 passes through the wall 307 to be connected to the base station server 400 located indoors, and the base station server 400 is electrically connected with the base station antenna 200 through the cable 304. Thus, the radio frequency signal output by the base station server 400 is transmitted to the base station antenna 200 through the cable 304, and is converted into an electromagnetic wave signal through the base station antenna 200 and radiated; alternatively, the base station antenna 200 receives an external electromagnetic wave signal, converts the external electromagnetic wave signal into a radio frequency signal, and transmits the radio frequency signal to the base station server 400 through the cable 304. The grounding device 305 is disposed on the cable 304 to achieve grounding of the cable 304. The lightning protection device 306 is arranged on the cable 304 and is positioned between the wall 307 and the base station server 400, and the lightning protection device 306 is used for lightning protection and drainage, so that the damage to the base station server 400 caused by the invasion of lightning along the cable 304 is avoided. A seal may be provided between the base station antenna 200 and the cable 304 to ensure tightness of the connection of the base station antenna 200 to the cable 304.

Referring to fig. 1 and fig. 2 together, in the present embodiment, a base station antenna 200 includes at least one antenna 201, a feed network 202, a radome 203, and an antenna joint 204. The antenna 201 is used to radiate or receive electromagnetic wave signals, and the base station antenna 200 radiates or receives electromagnetic wave signals through the antenna 201. The feed network 202 is electrically connected to the antenna 201 and the antenna connector 204, respectively. Antenna connector 204 is electrically coupled to base station server 400 via cable 304. The antenna 201 and the feed network 202 are accommodated in the radome 203, and the antenna connector 204 is located outside the radome 203. Antenna 201 performs its signal transmission with base station server 400 via feed network 202, antenna connection 204, and cable 304. The feed network 202 is configured to feed the radio frequency signal received and converted by the antenna 201 to the antenna joint 204 according to a certain amplitude or phase, and further to the base station server 400; alternatively, the radio frequency signal received by the antenna connector 204 and output from the base station server 400 is fed to the antenna 201 with a certain amplitude or phase, and the electromagnetic wave signal is radiated outward. In one embodiment, the feed network 202 may be comprised of a controlled impedance transmission line.

In this embodiment, the radome 203 is used to protect the antenna 201 and the feeding network 202, so as to improve the service life of the base station antenna 200. It can be appreciated that the radome 203 should have good electromagnetic wave penetration characteristics in terms of electrical performance, so as to avoid affecting the radiation of the antenna 201 or receiving electromagnetic wave signals; the radome 203 should have stable and reliable characteristics in mechanical performance so that the radome 203 can withstand the influence of the external harsh environment.

In the present embodiment, as shown in fig. 2, each antenna 201 includes an antenna panel 2011 and a plurality of radiation units 2012; wherein the frequencies of the radiating elements 2012 may be the same or different. The radiation unit 2012 is used for converting the radio frequency signal into an electromagnetic wave signal and radiating the electromagnetic wave signal; or receives an electromagnetic wave signal and converts it into a radio frequency signal. The antenna 201 performs its function of radiating or receiving electromagnetic wave signals through the radiating unit 2012. The plurality of radiation units 2012 are disposed on the antenna panel 2011, and the antenna panel 2011 is used for enhancing directivity of the antenna 201. Illustratively, the antenna 201 is disposed on one side of the antenna panel 2011. For convenience of description, the surface of the antenna panel 2011 on which the antenna 201 is provided is referred to as a front surface. The antenna panel 2011 can reflect and collect the electromagnetic wave signals from the front to the receiving point, so as to improve the receiving sensitivity of the electromagnetic wave signals and enhance the capability of the antenna 201 for receiving the electromagnetic wave signals; moreover, the antenna panel 2011 can also concentrate electromagnetic wave signals to radiate in the same direction as the front face, so as to enhance the ability of the antenna 201 to radiate electromagnetic wave signals; in addition, the antenna panel 2011 can also block and shield interference of other irrelevant electric waves from the back side of the antenna panel 2011 (the back side of the antenna panel 2011 refers to the surface of the antenna panel 2011 facing away from the front side) on the antenna 201 to radiate or receive electromagnetic wave signals, so as to improve the quality of the electromagnetic wave signals radiated or received by the antenna 201.

In this embodiment, as shown in fig. 2, the feed network 202 includes a phase shifter 100, a transmission component 2022, a calibration network 2023, and a power adapter 2024. The phase shifter 100 is electrically connected to the plurality of radiating elements 2012 of the antenna 201, and the phase shifter 100 is used for changing the phase distribution of each radiating element 2012 of the antenna 201, so as to adjust the electrical downtilt angle of the electromagnetic beam of the base station antenna 200, thereby adjusting the direction of the electromagnetic beam of the base station antenna 200. Specifically, the phase shifter 100 is an analog phase shifter, and the phase shifter 100 changes the phase of each radiation element 2012 by moving the phase shifting element therein so that the output signals form a continuous linear phase difference and transmitting the signals to each radiation element 2012, thereby achieving the purpose of adjusting the electrical downtilt angle thereof. The transmission component 2022 is electrically connected to the phase shifting unit of the phase shifter 100, and the transmission component 2022 is used to drive the phase shifting unit to move so that signals output by the phase shifter 100 form a phase difference, so that the phase shifter 100 can adjust an electrical downtilt angle of an electromagnetic beam of the base station antenna 200. The calibration network 2023 is electrically connected to the phase shifter 100, and the calibration network 2023 is configured to output a calibration signal and feed the calibration signal to the phase shifter 100 to perform amplitude calibration and phase calibration on electromagnetic beam forming of the antenna 201, so that the antenna 201 can form an electromagnetic beam with accurate pointing direction. In one embodiment, the calibration network 2023 may be omitted.

The power adapter 2024 is electrically connected to the phase shifter 100 and the antenna connector 204, and the power adapter 2024 is configured to divide one path of input signal energy into multiple paths of outputs; or, the multiple input signals are combined into one output. Specifically, the power adapter 2024 combines the signals transmitted from the antenna connector 204 into one path for outputting to the phase shifter 100, and processes the signals by the phase shifter 100 for outputting to the antenna 201; alternatively, the radio frequency signal converted by the antenna 201 after being processed by the phase shifter 100 is divided into multiple paths and transmitted to the antenna joint 204. The presence of the power adapter 2024 reduces the wiring complexity of the feed network 202, reducing costs. It is understood that the power adapter 2024 may be omitted, i.e. the phase shifter 100 is directly electrically connected to the antenna connection 204.

In other embodiments, the phase shifter 100 may also be a digital phase shifter. The digital phase shifter is internally provided with a control circuit, and the phase of each radiation unit 2012 of the antenna 201 is correspondingly changed by switching and selecting the phase of uniform stepping through a switch in the control circuit, so that the electrical downtilt angle of the electromagnetic beam of the base station antenna 200 is changed. At this time, the feeding network 202 omits the transmission component 2022.

The phase shifter 100 is described in a specific embodiment below.

Referring to fig. 2 and 3, the phase shifter 100 includes a main body 10, a suspension strip 20, a phase shifting unit 30, and at least one supporting device 40. The suspension strip 20, the phase shift unit 30, and the supporting device 40 are housed in the main body 10. The support device 40 supports the suspension strip 20, and the phase shift unit 30 slides relative to the suspension strip 20. The phase shift unit 30 is electrically connected to the driving component 2022 of the feeding network 202. The incoming signal from the base station server 400 (shown in fig. 1) enters the feed network 202 via the antenna connection 204, is transmitted to the suspended strip line 20 via the power adapter 2024, and is output to the radiating element 2012 of the antenna 201 via the suspended strip line 20. For convenience of the following description, a signal transmitted from the base station server 400 to the suspension strip line 20 is referred to as an input signal; the signal output to the radiating element 2012 via the suspended strip line 20 is referred to as the output signal. In this embodiment, the phase of the output signal is changed by driving the phase shifter 30 by the transmission component 2022 to move relative to the suspension strip 20, so as to change the phase of the radiation unit 2012, thereby achieving the purpose of adjusting the electrical downtilt angle of the phase shifter 100.

In this embodiment, the body 10 has a housing cavity 11. The cavity wall of the main body 10 serves as a ground for the phase shifter 100, and the electronic components housed in the housing cavity 11 of the phase shifter 100 are grounded through the main body 10. The suspension strip 20, the phase shift unit 30 and the supporting device 40 are accommodated in the accommodating chamber 11. The supporting device 40 is fixedly arranged in the accommodating cavity 11, the suspension strip line 20 is fixed on the supporting device 40, the suspension strip line 20 is fixed through the supporting device 40 and suspended in the accommodating cavity 11, and the suspension strip line 20 is suspended in the accommodating cavity 11, namely, a gap exists between the suspension strip line 20 and the cavity wall of the accommodating cavity 11, namely, the suspension strip line 20 is not contacted with the cavity wall of the accommodating cavity 11. This realizes stable positioning of the suspension strip line 20 in the accommodating chamber 11, not only ensures the performance of the suspension strip line 20, but also ensures the performance of the phase shifter 100, and prevents the suspension strip line 20 from being damaged due to scratch with the chamber wall of the accommodating chamber 11. In the present embodiment, the supporting device 40 is a buckle protruding on the wall of the accommodating cavity 11, and the number of the supporting devices 40 is four, and the suspension strap 20 is clamped with the four buckles and fixed in the accommodating cavity 11 without contacting with the accommodating cavity 11. In other embodiments, the supporting device 40 may be a supporting frame fixed in the accommodating cavity 11, or may be other fixing structures disposed in the accommodating cavity 11. The shape and structure of the supporting means 40 are not particularly limited in this application. The shape of the main body 10 is not particularly limited in this application, and may be various shapes such as a rectangular parallelepiped, a block, a sphere, and the like. The body 10 may be manufactured by a die casting or crimping process, etc., which is not particularly limited in this application.

In this embodiment, as shown in fig. 3, the housing chamber 11 includes a main chamber 111 and a sub chamber 112 communicating with the main chamber 111, the main chamber 111 and the sub chamber 112 each extend along a first direction X, and the sub chamber 112 is located at one side of the main chamber 111 and communicates with the main chamber 111 along a second direction Y, and the first direction X is perpendicular to the second direction Y. This is advantageous in reducing the length of the main body 10 and improving space utilization. It will be appreciated that the receiving chamber 11 may include only the primary chamber 111 or the secondary chamber 112, which may include more chambers, for example, the receiving chamber 11 may include three chambers, four chambers, five chambers, or the like. For convenience of the following description, a direction perpendicular to the first direction X and the second direction Y is defined as a third direction Z (as shown in fig. 5).

Referring to fig. 2, 4 and 5, the suspension strip line 20 is used for signal transmission to divide an input signal into multiple output signals, wherein the energy of the output signals may be the same or different. In the present embodiment, the suspension strip line 20 is electrically connected to the power adapter 2024 and the radiating element 2012 of the antenna 201, respectively. The suspension strip line 20 is specifically a sheet metal transmission strip line, and the material thereof may be various conductive metals such as copper, aluminum, or other conductive materials, which are not specifically limited in this application. In this embodiment, the suspended strip line 20 includes a main feed line 22, a power dividing junction 23, and an output feed line 24. The main feed 22 includes an input 221 and the output feed 24 includes at least two outputs 241. The main feed line 22 is connected to the output feed line 24 through a power dividing junction 23. In this embodiment, the power dividing junction 23 is integrally formed with the output feed line 24. The end of the main feed line 22 remote from the input 221 is connected to the power split junction 23, and each output 241 is remote from the power split junction 23, i.e. each output 241 is electrically connected only to the power split junction 23, it being understood that the input 221 and at least two outputs 241 are located on opposite sides of the suspension strip line 20.

The input 221 is located in the main cavity 111 at a position away from the sub-cavity 112, the main feeder 22 extends from the main cavity 111 into the sub-cavity 112, and the other end of the main feeder 22 away from the input 221 is connected to the power dividing junction 23. The power dividing junction 23, the output feed 24 and at least two output terminals 241 are all located in the secondary cavity 112. The input 221 is electrically connected to the power adapter 2024 for receiving an input signal. The output end 241 is electrically connected to the radiating unit 2012 to output an output signal to the radiating unit 2012, i.e. the output end 241 is electrically connected to the antenna 201.

In one embodiment, the output end 241 may be further connected to a power divider (a device for dividing one input signal into two or more paths to output equal or unequal energy), where each output end 241 may be electrically connected to the plurality of radiating elements 2012 through the power divider, so that one output signal output by each output end 241 may be divided into multiple paths to be output to the plurality of radiating elements 2012 through the power divider, thereby reducing the wiring complexity of the suspended strip line 20 and reducing the manufacturing cost of the phase shifter 100.

The input signal fed from the power adapter 2024 to the suspension strip line 20 is fed from the input 221 to the main feeder 22, through the main feeder 22 to the power dividing junction 23, and then through the power dividing junction 23 to the different output 241 along the output feeder 24, and the multiplexed output signal is output from the plurality of output 241, and then fed to the plurality of radiating elements 2012. In this embodiment, the suspension strip line 20 includes a main feeder 22, a power dividing junction 23, and an output feeder 24, the output feeder 24 includes two output ends 241, and the power dividing junction 23 is located between the two output ends 241, which will be described below. In other embodiments, the suspension strip line 20 may also include more output ends 241. For example, the suspension strip line 20 may further include three output terminals 241, each of the three output terminals 241 being remote from the power split junction 23.

Referring to fig. 4 and 5, in the present embodiment, the main feeder 22 includes a suspension section 222, a first connection section 223 and a second connection section 224. The suspension section 222, the first connection section 223 and the second connection section 224 are all flat strips. The suspension section 222 extends in the first direction X, the first connection section 223 extends in the second direction Y, one end of the first connection section 223 is connected to the suspension section 222, and the other end is connected to the second connection section 224. The second connection section 224 extends along the first direction X, and the second connection section 224 is configured to connect with the power dividing junction 23. The end of the suspension section 222 remote from the first connection section 223 is said input end 221. In the present embodiment, the suspension section 222 is located in the main cavity 111, the first connection section 223 is located in the main cavity 111 and the auxiliary cavity 112, and the second connection section 224 is located in the auxiliary cavity 112; wherein the suspension section 222 is in clearance with the cavity wall of the main cavity 111, i.e. the suspension section 222 is not in contact with the cavity wall of the main cavity 111. In the present embodiment, the first direction X refers to the length direction of the suspension section 222, the second direction Y refers to the thickness direction of the suspension section 222, and the third direction Z refers to the width direction of the suspension section 222.

Referring to fig. 3 to 6 together, in the present embodiment, the phase shifter 100 is provided with a filter structure 26 at the suspension section 222 of the main feeder 22, and the filter structure 26 includes an open slot 261 provided on the suspension section 222. The open slot 261 is used for loading parasitic capacitance to filter out specific signals transmitted in the main feeder 22, the specific signals refer to interference signals outside the working frequency range of the phase shifter 100, the phase shifter 100 implements specific frequency band filtering through the open slot 261, and for convenience of description, the filtered signals are defined as filtered signals.

In the present embodiment, as shown in fig. 4, 5 and 6, the open slot 261 penetrates the suspension section 222 along the thickness direction (i.e. the second direction Y) of the suspension section 222, and divides part of the suspension section 222 into a transmission belt 2221 and an open belt 2222 in the width direction (i.e. the third direction Z) of the suspension section 222, and the length directions of the transmission belt 2221 and the open belt 2222 are the same as the length direction (i.e. the first direction X) of the suspension section 222; the open belt 2222 is positioned on one side of the belt 2221 and is separated by an open slot 261. One end of the open-circuit strip 2222 is connected to the transmission strip 2221, and the other end of the open-circuit strip 2222 is suspended in the main cavity 111 (i.e. the accommodating cavity 11), i.e. the open-circuit strip is in an open-circuit state with a space between the open-circuit strip 2221 and the cavity wall of the main cavity 111.

Specifically, the suspension section 222 includes a first portion 2223, a second portion 2224, and a third portion 2225, opposite ends of the second portion 2224 in the length direction of the suspension section 222 are respectively connected to the first portion 2223 and the third portion 2225, an end of the third portion 2225, which is far away from the second portion 2224, is connected to the first connection section 223, an end of the first portion 2223, which is far away from the second portion 2224, is the input end 221, an open slot 261 is provided on the second portion 2224 to divide the second portion 2224 into the transmission belt 2221 and the open belt 2222, the transmission belt 2221 is respectively connected to the first portion 2223 and the third portion 2225, an end of the open belt 2222, which is near the input end 221, is connected to the transmission belt 2221, and the other end is spaced from the transmission belt 2221. In other embodiments, the open belt 2222 may be connected to the transmission belt 2221 at an end remote from the input terminal 221.

In other embodiments, the open slot 261 may divide all the suspension sections 222 into a transmission belt 2221 and an open belt 2222 in the width direction of the suspension sections 222, one end of the transmission belt 2221 is connected to the first connection section 223, the end of the transmission belt 2221 away from the first connection section 223 is the input end 221, one end of the open belt 2222 is connected to the transmission belt 2221, and the other end is spaced from the transmission belt 2221.

Parasitic capacitance is formed due to a gap between the open strip 2222 and the transmission strip 2221, i.e., the open slot 261 is loaded with parasitic capacitance. When an input signal flows through the portion of the suspension segment 222 provided with the open-circuit slit 261 from the input end 221, the filtered signal resonates and is consumed under the action of parasitic capacitance loaded on the open-circuit slit 261, so that the open-circuit slit 261 can filter the filtered signal from the input signal, and specific frequency-selecting filtering of the input signal is realized. Moreover, when an input signal flows from the input terminal 221 through the portion of the suspension segment 222 where the open slot 261 is provided, the existence of the open slot 261 effectively lengthens the transmission path of the signal. For example, as shown in fig. 6, since the signal path of the open strip 2222 is cut off, the signal L flowing through the open strip 2222 can flow only along the edge of the open slit 261 toward the transmission strip 2221 to form a return flow, effectively lengthening the transmission path of the signal. The extension of the signal transmission path is beneficial to filtering out the resonance of the signal, and is further beneficial to filtering out the filtered signal. Thus, the input signal received by the input terminal 221 is filtered at the suspension section 222 of the main feeder 22 through the open slot 261, and then fed to the power division junction 23, and is output from different output terminals 241 along the output feeder 24, so that the signal output by each output terminal 241 does not include a signal (i.e., an interference signal) that is not required by the user, and the phase shifter 100 implements the filtering function through the open slot 261.

Referring to fig. 2 and fig. 3 together with fig. 6, the phase shifter 100 of the present application integrates a filtering function by providing an open slot 261 in the suspension section 222 of the main feeder 22, so as to implement specific frequency band filtering (i.e. removing interference signals). The open-circuit slit 261 has a simple structure, which not only greatly reduces the filtering cost of the phase shifter 100, but also does not increase the size of the main feeder 22, has high space utilization, is beneficial to the layout of the main feeder 22 in the accommodating cavity 11 (i.e. in the main body 10), is beneficial to the miniaturization of the main body 10, and is further beneficial to the miniaturization of the phase shifter 100. Thus, the phase shifter 100 of the present application can be applied to the same small, micro or smaller base station antenna 200 as the conventional phase shifter not integrated with the filtering function, and is easy to integrate. In addition, when the phase shifter 100 is integrated in the base station antenna 200, the different frequency isolation of the base station antenna 200 can be effectively improved, and the communication quality of the base station antenna 200 can be improved; compared with the prior art, the design of the open-circuit gap 261 not only effectively avoids the passive intermodulation risk introduced by the increase of screws or welding spots, but also improves the communication quality; in addition, the additional insertion loss introduced by the external filter is avoided, and the radiation efficiency of the base station antenna 200 is improved.

It should be noted that, in the present embodiment, the width of the open slot 261 (i.e. the width of the slot between the transmission belt 2221 and the open belt 2222) should be between 1mm and 2mm, which is more beneficial to load parasitic capacitance to filter out the filtered signal. In the present embodiment, the average width of the open slit 261 is 1.5mm.

Referring to fig. 3 and fig. 6 together, in the present embodiment, the path length of the open slot 261 is a filtering wavelength of one eighth to one fourth, and the filtering wavelength refers to the wavelength of the signal (i.e. the interference signal) filtered by the open slot 261. The user can adjust the wavelength range of the signals filtered by the open slot 261 by adjusting the path length of the open slot 261, so that the user can conveniently filter the unwanted signals, the adjustment is simple, the adjustment cost is low, and the processing cost of the phase shifter 100 is reduced. In this embodiment, the path length of the open slot 261 is one sixth of the filtered wavelength. In other embodiments, the path length of the open slot 261 may also be a fifth, eighth, or other value in the eighth to quarter range of the filtered wavelength.

In the present embodiment, the open slit 261 has an L-shape as shown in fig. 5 and 6. Specifically, the open slot 261 includes a first segment 2611 and a second segment 2612, where the first segment 2611 and the second segment 2612 are all band-shaped slots, the first segment 2611 extends along the length direction (i.e., the first direction X) of the suspension segment 222, the second segment 2612 is communicated with one end of the first segment 2611 away from the input end 221, and the second segment 2612 extends along the width direction (i.e., the third direction Z) of the suspension segment 222 and penetrates through the side edge of the suspension segment 222 to communicate with the accommodating cavity 11. At this time, the path length of the open slit 261 refers to the sum of the lengths of the first segment 2611 and the second segment 2612. Therefore, the user can adjust the wavelength range of the signals filtered by the open-circuit slit 261 by adjusting the length of the first segment 2611 and/or the second segment 2612, and the adjustment is simple; and because the first section 2611 and the second section 2612 are all strip-shaped gaps, the structure is simple, the processing is easy, and the processing cost is reduced. It can be appreciated that when the length of the second section 2612 is smaller than that of the first section 2611, the length of the second section 2612 is negligible, and at this time, the user can quickly confirm the length of the first section 2611 according to the wavelength range of the signal to be filtered, thereby reducing the adjustment difficulty and the processing cost.

In this application, the shape of the open slit 261 is not particularly limited. For example, in another embodiment, as shown in fig. 8, the open slot 261 may also include a first segment 2613, a second segment 2614, a third segment 2615, and a fourth segment 2616 that are sequentially connected end to end, where the first segment 2613, the second segment 2614, the third segment 2615, and the fourth segment 2616 are all band-shaped slots, and the first segment 2613 and the third segment 2615 extend along the width direction (i.e., the third direction Z) of the suspension segment 222, and the second segment 2614 and the fourth segment 2616 extend along the length direction (i.e., the first direction X) of the suspension segment 222; wherein an end of the first segment 2613 remote from the second segment 2614 penetrates the suspension segment 222 along a width direction (i.e., a third direction Z) of the suspension segment 222. At this time, the path length of the open slit 261 refers to the sum of the lengths of the first segment 2613, the second segment 2614, the third segment 2615, and the fourth segment 2616. The user can also adjust the wavelength range of the signals filtered by the open slot 261 by adjusting the lengths of the first segment 2613, the second segment 2614, the third segment 2615, and the fourth segment 2616.

Referring to fig. 4 to 7, the filter structure 26 includes a fixing frame 262, and the fixing frame 262 corresponds to the open slot 261. The fixing frame 262 is accommodated in the main cavity 111 (i.e. the accommodating cavity 11), the fixing frame 262 is detachably connected with the suspension section 222, and the fixing frame 262 is used for limiting the transmission belt 2221 and the open circuit belt 2222 so as to limit the width of the open circuit gap 261. In this embodiment, the fixing frame 262 is a plastic frame. It is understood that the material of the holder 262 may be a dielectric material such as glass or rubber, which is not specifically limited in this application.

In the present embodiment, the fixing frame 262 includes a frame body 2621 and a plurality of buckles 2622, and the plurality of buckles 2622 are disposed on a surface of the frame body 2621 facing the suspension section 222. The frame 2621 is detachably connected to the suspension section 222, and the transmission belt 2221 and the open belt 2222 are relatively fixed by a plurality of buckles 2622. When the holder 2621 is fixedly coupled to the suspension segment 222, the holder 262 may be installed into the main cavity 111 along with the suspension segment 222 when the suspension ribbon wire 20 is installed into the receiving cavity 11. When the suspension wires 20 loaded in the housing chamber 11 are fixed by the supporting means 40 and suspended in the housing chamber 11, the frame body 2621 (i.e., the fixing frame 262) fixedly connected to the suspension section 222 is fixed in the main chamber 111. In this embodiment, the supporting devices 40 are buckles protruding from the wall of the accommodating cavity 11, as shown in fig. 4, the number of the supporting devices 40 is four, the suspension sections 222 are located at two sides of the open slot 261 and are respectively clamped with two supporting devices 40, and two output feeder lines 24 are respectively clamped with one supporting device 40, so that the suspension strip line 20 is fixed and suspended in the accommodating cavity 11 by the four supporting devices 40.

In this embodiment, as shown in fig. 3, 6 and 7, the suspension section 222 is provided with a limiting hole along the length direction (i.e. the first direction X) at two sides of the open slot 261, the limiting hole includes a first limiting hole 2226 and a second limiting hole 2227, the first limiting hole 2226 is farther away from the input end 221 than the second limiting hole 2227, a fixing buckle 2621 corresponding to the first limiting hole 2226 and a bump 2624 corresponding to the second limiting hole 2227 are disposed on the surface of the frame 2621 facing the suspension section 222, the fixing buckle 2623 is clamped in the first limiting hole 2226, and the bump 2624 is embedded in the second limiting hole 2227 along the thickness direction (i.e. the second direction Y) of the suspension section 222. In this embodiment, the first limiting hole 2226 is a square hole, the second limiting hole 2227 is a circular hole, and it can be understood that the first limiting hole 2226 and the second limiting hole 2227 may be both circular holes or both square holes, etc., and the shapes of the first limiting hole 2226 and the second limiting hole 2227 are not specifically limited in this application. The frame 2621 can be stably and firmly fixedly connected with the suspension section 222 through the cooperation of the fixing buckle 2623 and the first limit hole 2226 and the cooperation of the protruding point 2624 and the second limit hole 2227, so as to prevent the frame 2621 from shaking or even moving relative to the suspension section 222. In addition, the design of the fixing buckle 2623 and the convex points 2624 is simple in structure, low in processing cost and convenient to assemble and disassemble.

In other embodiments, the first limiting hole 2226 is closer to the input end 221 than the second limiting hole 2227, the fixing buckle 2623 is clamped in the first limiting hole 2226, and the protruding point 2624 is embedded in the second limiting hole 2227. In other embodiments, the surface of the frame body 2621 facing the suspension section 222 may be provided with two fixing buckles 2623 or two protruding points 2624 corresponding to the first limiting hole 2226 and the second limiting hole 2227, and the frame body 2621 is fixedly connected with the suspension section 222 through the matching connection of the two fixing buckles 2623 or the two protruding points 2624 and the first limiting hole 2226 and the second limiting hole 2227.

In addition, in the present embodiment, as shown in fig. 3, when the suspension wire 20 is fixed and suspended in the accommodating cavity 11, the frame body 2621 further supports the suspension section 222, so as to further ensure that the suspension section 222 is stably suspended in the main cavity 111. Specifically, the opposite ends of the frame 2621 in the thickness direction (i.e., the second direction Y) of the suspension section 222 respectively press against the cavity wall of the main cavity 111, and the opposite ends in the width direction (i.e., the third direction Z) of the suspension section 222 respectively press against the cavity wall of the main cavity 111, so that the frame 2621 located in the main cavity 111 is limited in the thickness direction (i.e., the second direction Y) and the width direction (the third direction Z) of the suspension section 222, and further limits the suspension section 222 fixedly connected with the frame 2621 in the thickness direction and the width direction of the suspension section 222, further preventing the suspension section 222 from contacting the cavity wall of the main cavity 111, and further ensuring that the suspension section 222 can be stably suspended in the main cavity 111. In other embodiments, there may be a gap between the frame 2621 secured to the suspension section 222 and the cavity wall of the main cavity 111, i.e., the frame 2621 is suspended in the main cavity 111.

In the present embodiment, as shown in fig. 3, 6 and 7, a plurality of clamping grooves are respectively disposed on two sides of the transmission belt 2221 and the open-circuit belt 2222 in the width direction (i.e. the third direction Z) of the suspension section 222, and a plurality of buckles 2622 are correspondingly clamped with the plurality of clamping grooves one by one to fix the transmission belt 2221 and the open-circuit belt 2222 on the fixing frame 262 respectively.

Specifically, the transmission belt 2221 and the open belt 2222 are respectively provided with a plurality of first clamping grooves 2228 on a side facing away from the open slot 261, and a plurality of second clamping grooves 2229 are respectively provided on a side facing toward the open slot 261, the plurality of clamping grooves 2622 include a plurality of first clamping grooves 2625 and a plurality of second clamping grooves 2626, the first clamping grooves 2625 correspond to the first clamping grooves 2228, and each first clamping groove 2625 is inserted into a gap between a cavity wall of the main cavity 111 and the transmission belt 2221 or the open belt 2222 along a thickness direction (i.e., the second direction Y) of the suspension section 222 to be clamped with the corresponding first clamping groove 2228, i.e., the first clamping groove 2625 is located outside the open slot 261; the second buckles 2626 correspond to the second clamping grooves 2229, each second buckle 2626 is inserted into the open-circuit gap 261 along the thickness direction of the suspension section 222 and is clamped with the corresponding second clamping groove 2229, so that the transmission belt 2221 and the open-circuit belt 2222 are fixedly connected with the fixing frame 262 through the matching connection of the first buckle 2625 and the first clamping groove 2228 as well as the second buckle 2626 and the second clamping groove 2229, and accordingly the transmission belt 2221 and the open-circuit belt 2222 are relatively fixed, and the structure is stable, simple and low in processing cost. The fixing frame 262 can prevent the transmission belt 2221 and the open-circuit belt 2222 from deflecting or swinging, for example, the open-circuit belt 2222 deflects relative to the transmission belt 2221 along the thickness direction (i.e., the second direction Y) of the suspension section 222. Thus, the holder 262 can ensure that the width of the open slot 261 is not changed during the operation of the phase shifter 100. In this way, the occurrence of a change in the width of the open slit 261 is effectively avoided. Moreover, the second buckle 2626 inserted into the open slot 261 further ensures the width of the open slot 261, ensures that the open slot 261 can stably and reliably load parasitic capacitance, and further ensures that the open slot 261 can stably filter signals.

In other embodiments, the fixing frame 262 may also include a frame body 2621 and a limiting body, the limiting body is protruding on a surface of the frame body 2621 facing the suspension section 222, the limiting body is located in the open slot 261, and the limiting body abuts against a side surface of the transmission belt 2221 and the open belt 2222 facing the open slot 261. In this way, the limit body abuts against the transmission belt 2221 and the open circuit belt 2222, so that the width of the open circuit gap 261 is not changed, and the open circuit gap 261 can be ensured to stably filter signals.

Referring to fig. 3, 5 and 6 again, in the present embodiment, the number of open slits 261 is one, the number of holders 262 is one, and the holders 262 correspond to the open slits 261. It is understood that the number of open slits 261 and the number of holders 262 may be greater, and that the open slits 261 are spaced apart from each other on the suspension segment 222. For example, in another embodiment, as shown in fig. 9, the number of open slits 261 and the number of holders 262 are two, the two open slits 261 are arranged at intervals along the length direction (i.e. the first direction X) of the suspension section 222, the two holders 262 are in one-to-one correspondence with the two open slits 261, and the holders 262 are used for controlling the slit width of the corresponding open slits 261. The path lengths of the two open slits 261 may be different so that the two open slits 261 can filter out signals of different wavelength ranges, respectively. For example, the open slit 261 includes a first open slit and a second open slit, the path length of the first open slit is X, the path length of the second open slit is Y, the paths of the second open slit are different, the first open slit can filter signals with the wavelength range of 4X to 8X, the second open slit can filter signals with the wavelength range of 4Y to 8Y, and thus the two open slits 261 can filter signals with different wavelength ranges respectively. Since the two open slits 261 can filter out signals of different wavelength ranges, respectively, this effectively increases the operating bandwidth of the phase shifter 100. In other embodiments, two open slits 261 may also be spaced along the width direction (i.e., the third direction Z) of the suspension segment 222.

Referring to fig. 2, 3 and 6 again, the phase shifter 100 of the present application integrates a filtering function by setting the open slot 261 in the suspension section 222 of the main feeder 22, so as to implement specific frequency band filtering (i.e. to remove interference waves), and a user can adjust the wavelength range of the signal filtered by the open slot 261 by only adjusting the path length of the open slot 261, so as to facilitate user adjustment. Moreover, the user can filter out signals in different wavelength ranges by setting a plurality of open slits 261 with different path lengths on the suspension segment 222, so as to effectively increase the working bandwidth of the phase shifter 100. In addition, the design of the fixing frame 262 ensures that the open slot 261 can stably and reliably load parasitic capacitance, so as to ensure that the phase shifter 100 stably filters signals in a specific frequency band. In addition, the design of the open slot 261 has a simple structure, greatly reduces the filtering cost of the phase shifter 100, does not increase the size of the main feeder 22, has high space utilization, is beneficial to the layout of the main feeder 22 in the accommodating cavity 11 (i.e. in the main body 10), is beneficial to the miniaturization of the main body 10, and is further beneficial to the miniaturization of the phase shifter 100. Thus, the phase shifter 100 of the present application can be applied to the same small, micro or smaller base station antenna 200 as the conventional phase shifter not integrated with the filtering function, and is easy to integrate. In addition, when the phase shifter 100 is integrated in the base station antenna 200, due to the filtering function, the phase shifter can effectively improve the different frequency isolation of the base station antenna 200, and improve the communication quality of the base station antenna 200, compared with the prior art, the design of the open slot 261 can effectively avoid the passive intermodulation risk caused by the increase of screws or welding spots, and improve the communication quality; in addition, the additional insertion loss introduced by the external filter is avoided, and the radiation efficiency of the base station antenna 200 is improved.

Referring to fig. 3, 4, 5 and 10, in the present embodiment, the second connecting section 224 is provided with a connecting hole 2241 (as shown in fig. 5), and the connecting hole 2241 penetrates the second connecting section 224 along the thickness direction (i.e. the second direction Y) of the suspension section 222. The power dividing junction 23 is convexly provided with a plugging end 231 along the thickness direction (i.e., the second direction Y) of the suspension section 222, and the plugging end 231 is fixedly plugged into the connecting hole 2241 along the thickness direction (the second direction Y) of the suspension section 222 through processes such as cementing, welding and the like, so that the second connecting section 224 is connected with the power dividing junction 23, and the power dividing junction has stable and simple structure, low processing cost and convenient disassembly and assembly, and ensures the stability of the internal structure of the phase shifter 100. In other embodiments, the power dividing junction 23 may be directly fixed to the second connecting section 224 by welding or gluing, and the power dividing junction 23 and the second connecting section 224 may be directly integrally formed. The signal is fed from the input 221 to the power dividing junction 23 along the suspension 222, the first connection 223 and the second connection 224 in sequence, and is output from the different output 241 through the output feeder 24. In other embodiments, the first connecting section 223 and the second connecting section 224 may be omitted, i.e. the power dividing junction 23 is directly fixedly connected with the suspension section 222 by welding or gluing; alternatively, the power split junction 23 is integrally formed with the suspension segment 222.

Referring to fig. 2 to 4 again, the phase shifting unit 30 can move relative to the output feeder 24 of the suspension strip 20 to change the phase of the output signal, which is the signal processed by the suspension strip 20 and then output from the output terminal 241 to the radiation unit 2012. In this embodiment, the phase shift unit 30 is a dielectric body. The phase shift unit 30 is located in the secondary cavity 112. The phase shift unit 30 is disposed at one side or both sides of the output feed line 24 to cover the output feed line 24; the phase shift unit 30 may be in direct contact with the output feed line 24, or a gap may exist. The phase shifting unit 30 can move relative to the output feeder 24 to adjust the area of the output feeder 24 covered by the phase shifting unit 30, so as to continuously change the phase value from the power dividing junction 23 to the output end 241, realize continuous change of the output signal phase, further change the phase of the radiation unit 2012 to adjust the electrical downtilt angle of the base station antenna 200, and facilitate user adjustment.

Specifically, the number of the phase shift units 30 is one, the output feeder 24 includes a first output section 242 and a second output section 243, one ends of the first output section 242 and the second output section 243 are connected to the power dividing junction 23, the other ends are output ends 241, the first output section 242 and the second output section 243 are arranged in the auxiliary cavity 112 along the length direction (i.e. the first direction X) of the suspension section 222, the output end 241 of the first output section 242 is far from the input end 221 in the length direction of the suspension section 222 compared with the output end 241 of the second output section 243, and the phase shift unit 30 covers the first output section 242, the second output section 243 and the power dividing junction 23. The phase shift unit 30 moves along the length direction of the suspension section 222 to continuously change the areas of the first output section 242 and the second output section 243 covered by the phase shift unit 30, so as to continuously adjust the equivalent dielectric constants of the first output section 242 and the second output section 243, so that the phases of the power dividing junction 23 to the two output ends 241 can be continuously changed at the same time, and the phases of the output signals output by the two output ends 241 can be changed at the same time. For example, when the phase shift unit 30 moves in the first direction X away from the input 221 relative to the output feed line 24, the area of the second output section 243 covered by the phase shift unit 30 decreases such that the equivalent dielectric constant of the second output section 243 decreases; the area of the first output section 242 covered by the phase shift unit 30 increases such that the equivalent dielectric constant of the first output section 242 increases, and thus the phase of the power dividing junction 23 to the two output terminals 241 changes simultaneously, thereby changing the signal of the output signal.

It will be appreciated that the number of phase shift units 30 may also correspond to the number of output ends 241, where each phase shift unit 30 is disposed on one side or both sides of and covers an output segment between one output end 241 and the power dividing junction 23, and each phase shift unit 30 moves relative to the output feeder 24 to adjust the area covered by the phase shift unit 30 of the corresponding output segment, thereby changing the phase from the different output ends 241 to the power dividing junction 23. For example, the number of the phase shift units 30 may be two, and the two phase shift units are respectively referred to as a first phase shift unit and a second phase shift unit, where the first phase shift unit is disposed on one side or both sides of the first output section 242 and covers the first output section 242, the second phase shift unit is disposed on one side or both sides of the second output section 243 and covers the second output section 243, and the first phase shift unit and the second phase shift unit are respectively moved relative to the output feeder 24, so that the area covered by the first phase shift unit of the first output section 242 and the area covered by the second phase shift unit of the second output section 243 are changed, thereby changing the phase of the output signal.

Referring to fig. 2 and 3 again, the phase shifter 100 of the present embodiment has a phase shifting function and a filtering function, when the phase shifter 100 receives a signal transmitted from the antenna connector 204 via the power adapter 2024, the phase shifter 100 filters the signal in a specific frequency band (i.e. removes interference waves) through the open slot 261, then performs phase shifting processing on the signal, and then transmits the signal to each radiation unit 2012 of the antenna 201 to adjust the electrical downtilt angle of the electromagnetic beam of the base station antenna 200, thereby effectively reducing interference of unnecessary signals to the radiation unit 2012, further ensuring that each frequency band of the base station antenna 200 is not interfered, improving the isolation of different frequencies, and improving the communication quality of the base station antenna 200. Compared with the scheme of externally arranging the filter on the phase shifter 100 to improve the isolation degree of different frequencies, the phase shifter 100 integrating the filtering function and the phase shifting function not only reduces the number of screws or welding spots and the passive intermodulation risk, improves the communication quality of the base station antenna 200, but also avoids the addition of extra insertion loss caused by the externally arranged filter and effectively improves the radiation efficiency of the base station antenna 200. In addition, the phase shifter 100 of the present embodiment has no increase in the overall size and the internal space volume thereof after integrating the phase shifting function and the filtering function, compared with the conventional phase shifter having only the phase shifting function. Thus, with the development of miniaturization of the base station antenna 200, the phase shifter 100 of the present embodiment can always integrate the filtering function on the basis of ensuring the phase shifting function thereof, which is advantageous for miniaturization of the base station antenna 200.

The above is only a part of examples and embodiments of the present application, and the scope of the present application is not limited thereto, and any person skilled in the art who is familiar with the technical scope of the present application can easily think about the changes or substitutions, and all the changes or substitutions are covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The phase shifter is characterized by comprising a main body and a suspension strip line, wherein the main body comprises an accommodating cavity, the suspension strip line is accommodated in the accommodating cavity, and the suspension strip line comprises a main feeder line, a power dividing junction, an output feeder line and a filtering structure;

the utility model provides a power distribution device, including main feeder, output feeder, filter structure, wherein the main feeder is the input, the other end with the junction is divided to the merit is connected, the other end of junction is divided to the merit is connected the output feeder, the output feeder includes two at least output, every the output is all kept away from the junction is divided to the merit, the main feeder includes the suspension section, filter structure is including locating open circuit gap on the suspension section, open circuit gap is in the thickness direction of suspension section runs through the suspension section, and in suspension section width direction will the suspension section divide into parallel arrangement's transmission band and open circuit area, open circuit area with the length direction of transmission band with the length direction of suspension section is the same, wherein, the one end of open circuit area with the transmission band is connected, the other end unsettled in accept the intracavity.

2. The phase shifter of claim 1, wherein the open slot has a path length of one eighth to one fourth of a filtered wavelength.

3. The phase shifter of claim 1, wherein the open slot comprises a first section and a second section, the first section extending along a length of the suspension section, the second section communicating with an end of the first section remote from the input end, and the second section extending along a width of the suspension section and extending through a side of the suspension section in communication with the receiving cavity.

4. The phase shifter of claim 1, wherein the open slot comprises a first section, a second section, a third section, and a fourth section connected end to end in sequence, the first section and the third section extending in a width direction of the suspension section, the second section and the fourth section extending in a length direction of the suspension section; wherein, the first section is kept away from the one end of second section is followed the width direction of suspension section runs through the suspension section.

5. The phase shifter of any one of claims 1 to 4, wherein the number of open slits is plural, the plural open slits are provided on the main feed line at intervals from each other, and path lengths of the plural open slits are different.

6. The phase shifter of any one of claims 1 to 4, wherein the filtering structure comprises a fixing frame, the main feeder is fixed and suspended in the accommodating cavity, the fixing frame is accommodated in the accommodating cavity, the fixing frame is detachably connected with the suspension section, and the fixing frame is used for limiting the transmission belt and the open circuit belt.

7. The phase shifter of claim 6, wherein the mount includes a stop body positioned within the open slot, the stop body abutting the transmission belt and a side of the open slot facing the open slot.

8. The phase shifter according to claim 7, wherein the fixing frame includes a frame body, the stopper body is provided protruding on a surface of the frame body facing the suspension section, opposite end portions of the frame body in a thickness direction of the suspension section are respectively pressed against a cavity wall of the accommodating cavity, and opposite end portions in a width direction of the suspension section are respectively pressed against a cavity wall of the accommodating cavity.

9. The phase shifter according to claim 6, wherein the fixing frame includes a plurality of buckles, a plurality of clamping grooves are respectively provided on both sides of the transmission belt and the open circuit belt in the width direction of the suspension section, and the plurality of buckles are in one-to-one corresponding clamping connection with the plurality of clamping grooves.

10. The phase shifter of claim 6, wherein the fixing frame comprises a frame body, the suspension section is provided with a limiting hole penetrating through the suspension section, the limiting hole is located on two opposite sides of the open-circuit slit, the frame body is provided with a protrusion or a fixing buckle corresponding to the limiting hole, and the protrusion or the fixing buckle is clamped in the limiting hole.

11. The phase shifter of any one of claims 1 to 4, wherein the main feeder further comprises a first connection section and a second connection section, one end of the first connection section is electrically connected with the transmission band of the suspension section, the other end of the first connection section is connected with the second connection section, the other end of the second connection section is connected with the power dividing junction, one end of the open-circuit strip is connected with the transmission band, and the other end of the open-circuit strip is disposed at an interval from the transmission band through the open-circuit slit.

12. The phase shifter of claim 11, wherein the second connection section has a connection hole at an end near the power division junction, the power division junction has a protruding insertion end, and the insertion end is inserted into the connection hole, so that the main feeder line is connected to the power division junction.

13. The phase shifter of any one of claims 1 to 4, wherein the housing chamber includes a main chamber and a sub chamber, the main chamber and the sub chamber each extending along a length direction of the suspension section, the sub chamber being located on one side of the main chamber and communicating with the main chamber along a thickness direction of the suspension section, the input end being located on a side of the main chamber remote from the sub chamber, the main feed line extending from the main chamber into the sub chamber, the power dividing junction and the output feed line each being located in the sub chamber; wherein the suspension section is located in the main cavity.

14. The phase shifter of any one of claims 1-4, further comprising a phase shifting unit located in the housing cavity, the phase shifting unit moving relative to the output feed line to adjust the phase between the output and the power splitting junction.

15. The phase shifter of claim 14, wherein the phase shifting element is a dielectric body, the phase shifting element covers the output feed line, the phase shifting element moves relative to the output feed line to adjust an area of the output feed line covered by the phase shifting element.

16. A base station antenna comprising the phase shifter of any one of claims 1 to 15 and an antenna, the output being electrically connected to the antenna.

17. A base station comprising the base station antenna of claim 16 and a base station server, the base station server being electrically connected to the base station antenna.