Multi-frequency base station antenna

Abstract

The utility model provides a multi-frequency base station antenna, and relates to the technical field of communication equipment, in the multi-frequency base station antenna, positive and negative polarization signals of a plurality of low-frequency dual-polarization oscillators are accessed to at least one low-frequency phase shifter, and positive and negative polarization signals of a plurality of intermediate-frequency dual-polarization oscillators are accessed to at least one intermediate-frequency phase shifter; each low-frequency phase shifter and each intermediate-frequency phase shifter are respectively connected with a corresponding output end of the motor through a corresponding transmission piece, and the motor is further connected with external main equipment through a control line and used for receiving a control instruction from the external main equipment and controlling the corresponding output end to act according to the control instruction. And each transmission part is used for converting the rotary motion of the corresponding output end of the motor into linear motion and transmitting the linear motion to the corresponding low-frequency phase shifter or the intermediate-frequency phase shifter. The multi-frequency base station antenna provided by the utility model can meet the network coverage requirements of multiple frequency bands at the same time, the downward inclination angle of the antenna can be remotely adjusted, the main beam coverage range of antenna radiation is changed, and the coverage rate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of communication equipment, and in particular to a multi-frequency base station antenna. Background Art

[0002] Base station antennas are devices used in mobile communication networks, primarily responsible for transmitting and receiving wireless signals. In mobile communication network engineering design, base station antenna selection should be based on actual conditions, including network coverage requirements, traffic distribution, anti-interference requirements, and network service quality.

[0003] In related technologies, base station antennas have the following problems:

[0004] (1) Insufficient deep coverage: The old city has densely populated houses with small distances between buildings, which has a significant impact on the propagation of wireless signals, resulting in weak or no coverage of base station antennas.

[0005] (2) High traffic pressure: Densely populated urban areas have a large number of mobile users, and the users are concentrated and the traffic volume is high, which leads to the continuous increase in the configuration of base station antennas and a surge in network interference.

[0006] (3) Impact on surrounding base stations: The wireless environment in densely populated urban areas is complex and has severe internal interference, which can easily affect the antennas of surrounding base stations.

[0007] (4) Construction is difficult and costly: Residents in densely populated urban areas are more sensitive to mobile base stations. Site selection for base stations is difficult, buildings are densely packed, and signal transmission losses are large. Relying on macro stations and distributed systems for coverage is costly. Utility Model Content

[0008] The present invention is completed in order to at least partially solve the technical problems of insufficient depth coverage, severe interference, high cost, etc. existing in the prior art of base station antennas distributed in densely populated urban areas.

[0009] The utility model provides a multi-frequency base station antenna, comprising: a reflector, and a low-frequency radiation unit, an intermediate-frequency radiation unit, a low-frequency phase shifter, an intermediate-frequency phase shifter, a connector, a transmission member, and a motor arranged on the reflector, wherein the low-frequency radiation unit comprises a plurality of low-frequency dual-polarization vibrators, and the intermediate-frequency radiation unit comprises a plurality of intermediate-frequency dual-polarization vibrators; the positive polarization signals and the negative polarization signals of the plurality of low-frequency dual-polarization vibrators are connected to at least one low-frequency phase shifter, each low-frequency phase shifter is connected to two corresponding connectors, and the positive polarization signals and the negative polarization signals of the plurality of intermediate-frequency dual-polarization vibrators are connected to the at least one low-frequency phase shifter. The signal is connected to at least one intermediate frequency phase shifter, each intermediate frequency phase shifter is connected to two corresponding connectors, and each connector is connected to a cable; each low frequency phase shifter and each intermediate frequency phase shifter is respectively connected to a corresponding output end of the motor through a corresponding transmission member, and the motor is also connected to an external main device through a control line, which is used to receive control instructions from the external main device and control the corresponding output end according to the control instructions. Each transmission member is used to convert the rotational motion of the corresponding output end of the motor into linear motion and transmit it to the corresponding low frequency phase shifter or intermediate frequency phase shifter.

[0010] Optionally, the low-frequency radiation unit includes two groups of low-frequency dual-polarization vibrators, and the intermediate-frequency radiation unit includes four groups of intermediate-frequency dual-polarization vibrators; the two groups of low-frequency dual-polarization vibrators are arranged in two straight lines, the first group and the second group of intermediate-frequency dual-polarization vibrators in the four groups of intermediate-frequency dual-polarization vibrators are arranged in two straight lines and are located in the middle of the two straight lines formed by the two groups of low-frequency dual-polarization vibrators, and the third group and the fourth group of intermediate-frequency dual-polarization vibrators in the four groups of intermediate-frequency dual-polarization vibrators are located on both sides of the first group and the second group of intermediate-frequency dual-polarization vibrators, respectively.

[0011] Optionally, adjacent intermediate frequency dual-polarization vibrators in the third group of intermediate frequency dual-polarization vibrators are staggered to form two straight lines, wherein the first straight line coincides with a straight line formed by an arrangement of a group of low-frequency dual-polarization vibrators, and the intermediate frequency dual-polarization vibrators located on the first straight line are respectively arranged inside the group of low-frequency dual-polarization vibrators, wherein the intermediate frequency dual-polarization vibrators on the second straight line are arranged at equal intervals from the first and second groups of intermediate frequency dual-polarization vibrators; and / or,

[0012] Adjacent intermediate frequency dual-polarization vibrators in the fourth group of intermediate frequency dual-polarization vibrators are arranged in an staggered manner to form two straight lines, wherein the first straight line coincides with the straight line formed by another group of low-frequency dual-polarization vibrators, and the intermediate frequency dual-polarization vibrators located on the first straight line are respectively arranged inside the other group of low-frequency dual-polarization vibrators, wherein the intermediate frequency dual-polarization vibrators on the second straight line are arranged at equal intervals from the first and second groups of intermediate frequency dual-polarization vibrators.

[0013] Optionally, the two groups of low-frequency dual-polarization oscillators correspond to two low-frequency phase shifters, wherein each group of low-frequency dual-polarization oscillators includes 7 low-frequency dual-polarization oscillators; the four groups of intermediate-frequency dual-polarization oscillators correspond to two intermediate-frequency phase shifters, wherein each group of intermediate-frequency dual-polarization oscillators includes 12 intermediate-frequency dual-polarization oscillators;

[0014] The positive polarization signals and negative polarization signals of the two low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are each synthesized into one positive polarization signal and one negative polarization signal through a low-frequency one-to-two power splitter and then connected to a low-frequency phase shifter. The positive polarization signals and negative polarization signals of the other two low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are each synthesized into one positive polarization signal and one negative polarization signal through a low-frequency one-to-two power splitter and then connected to the same low-frequency phase shifter. The positive polarization signals and negative polarization signals of the remaining three low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are directly connected to the same low-frequency phase shifter; each low-frequency phase shifter is connected to five positive polarization signals and five negative polarization signals corresponding to a group of low-frequency dual-polarization vibrators;

[0015] Each group of intermediate frequency dual-polarization oscillators is divided into four small groups of intermediate frequency dual-polarization oscillators, and each small group of intermediate frequency dual-polarization oscillators includes three intermediate frequency dual-polarization oscillators. The positive polarization signal and the negative polarization signal of each small group of intermediate frequency dual-polarization oscillators are respectively synthesized into one positive polarization signal and one negative polarization signal through an intermediate frequency one-to-three power splitter board. The four positive polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two positive polarization signals through a combiner and then connected to the first intermediate frequency phase shifter. The four negative polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two negative polarization signals through another combiner and then connected to the second intermediate frequency phase shifter; the first intermediate frequency phase shifter is connected to eight positive polarization signals, and the second intermediate frequency phase shifter is connected to eight negative polarization signals.

[0016] Optionally, the two groups of low-frequency dual-polarization oscillators correspond to two low-frequency phase shifters, wherein each group of low-frequency dual-polarization oscillators includes 5 low-frequency dual-polarization oscillators; the four groups of intermediate-frequency dual-polarization oscillators correspond to two intermediate-frequency phase shifters, wherein each group of intermediate-frequency dual-polarization oscillators includes 8 intermediate-frequency dual-polarization oscillators;

[0017] The positive polarization signals and negative polarization signals of the five low-frequency dual-polarization oscillators in each group of low-frequency dual-polarization oscillators are directly connected to the same low-frequency phase shifter; each low-frequency phase shifter is connected to five positive polarization signals and five negative polarization signals corresponding to a group of low-frequency dual-polarization oscillators;

[0018] Each group of intermediate frequency dual-polarization oscillators is divided into four small groups of intermediate frequency dual-polarization oscillators, and each small group of intermediate frequency dual-polarization oscillators includes two intermediate frequency dual-polarization oscillators. The positive polarization signal and the negative polarization signal of each small group of intermediate frequency dual-polarization oscillators are respectively synthesized into one positive polarization signal and one negative polarization signal through an intermediate frequency one-to-two power splitter board. The four positive polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two positive polarization signals through a combiner and then connected to the first intermediate frequency phase shifter. The four negative polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two negative polarization signals through another combiner and then connected to the second intermediate frequency phase shifter; the first intermediate frequency phase shifter is connected to eight positive polarization signals, and the second intermediate frequency phase shifter is connected to eight negative polarization signals.

[0019] Optionally, the two groups of low-frequency dual-polarization oscillators correspond to two low-frequency phase shifters, wherein each group of low-frequency dual-polarization oscillators includes 9 low-frequency dual-polarization oscillators; the four groups of intermediate-frequency dual-polarization oscillators correspond to two intermediate-frequency phase shifters, wherein each group of intermediate-frequency dual-polarization oscillators includes 16 intermediate-frequency dual-polarization oscillators;

[0020] The positive polarization signals and negative polarization signals of the three low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are each synthesized into one positive polarization signal and one negative polarization signal through a low-frequency one-to-three power splitter and then connected to a low-frequency phase shifter. The positive polarization signals and negative polarization signals of the other three low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are each synthesized into one positive polarization signal and one negative polarization signal through a low-frequency one-to-three power splitter and then connected to the same low-frequency phase shifter. The positive polarization signals and negative polarization signals of the remaining three low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are directly connected to the same low-frequency phase shifter; each low-frequency phase shifter is connected to five positive polarization signals and five negative polarization signals corresponding to a group of low-frequency dual-polarization vibrators;

[0021] Each group of intermediate frequency dual-polarization oscillators is divided into four small groups of intermediate frequency dual-polarization oscillators, and each small group of intermediate frequency dual-polarization oscillators includes four intermediate frequency dual-polarization oscillators. The positive polarization signal and the negative polarization signal of each small group of intermediate frequency dual-polarization oscillators are respectively synthesized into one positive polarization signal and one negative polarization signal through an intermediate frequency one-to-four power splitter board. The four positive polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two positive polarization signals through a combiner and then connected to the first intermediate frequency phase shifter. The four negative polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two negative polarization signals through another combiner and then connected to the second intermediate frequency phase shifter; the first intermediate frequency phase shifter is connected to eight positive polarization signals, and the second intermediate frequency phase shifter is connected to eight negative polarization signals.

[0022] Optionally, the multi-frequency base station antenna also includes: a ruler; each ruler is connected to a portion of a corresponding transmission member that performs linear motion; each ruler passes through a first fixing member and is slidably connected to the first fixing member, and the first fixing member is connected to the reflector; the portion of each transmission member that performs linear motion passes through at least one second fixing member and is slidably connected to the second fixing member, and the second fixing member is also connected to the reflector.

[0023] Optionally, the edge of the reflective plate is bent upward to form a wall; the low-frequency radiation unit and the intermediate-frequency radiation unit are located on the front of the reflective plate, and the low-frequency phase shifter, the intermediate-frequency phase shifter, the transmission member and the motor are located on the back of the reflective plate.

[0024] Optionally, the multi-frequency base station antenna further includes: an antenna cover, an upper end cover and a lower end cover; the antenna cover is a hollow structure with openings at both ends, a placement chamber is provided therein, the reflector is located in the placement chamber, the upper end cover and the lower end cover are respectively provided at both ends of the antenna cover; the reflector is bent upward at one end corresponding to the lower end cover to form a joint surface, and each joint is provided on the joint surface, and the lower end cover is provided with through holes with the same number as the joints at positions corresponding to each joint, and each joint is detachably connected to the joint surface through its corresponding through hole.

[0025] Optionally, a plurality of supporting members are provided on the back of the reflector, and the plurality of supporting members are detachably connected to the inner surface of the back of the radome;

[0026] The outer surface of the back side of the antenna cover is also provided with a plurality of mounting plates, which are detachably connected to the outer surface of the back side of the antenna cover, and each mounting plate corresponds to the position of a group of support members, and each group of support members includes at least one support member; and / or, the outer surface of the back side of the antenna cover is also provided with a reinforcement connecting plate, which is detachably connected to the outer surface of the back side of the antenna cover, and the reinforcement connecting plate corresponds to the position of a group of support members, and each group of support members includes at least one support member.

[0027] The technical solution provided by the utility model may have the following beneficial effects:

[0028] The multi-frequency base station antenna provided by the present invention realizes the integration of multiple frequency bands by setting low-frequency radiation units and medium-frequency radiation units, which can meet the network coverage requirements of multiple frequency bands at the same time, and also realizes that a single multi-frequency multi-mode antenna replaces multiple antennas of different frequency bands, thereby reducing the overall volume of the multi-frequency base station antenna; by setting low-frequency phase shifters, medium-frequency phase shifters, transmission parts and motors, the downtilt angle of the antenna can be remotely adjusted to change the coverage range of the main beam radiated by the antenna, thereby improving the coverage rate and avoiding affecting the surrounding base station antennas; moreover, the multi-frequency base station antenna is simple and convenient to install and has low cost.

[0029] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0031] Figure 1 A schematic diagram of the overall structure of a multi-frequency base station antenna provided in Example 1 of the present utility model;

[0032] Figure 2 A schematic structural diagram of the reflector and components disposed on the front of the reflector in the multi-frequency base station antenna provided in Example 1 of the present utility model;

[0033] Figure 3 A schematic structural diagram of the reflector and components arranged on the back of the reflector in the multi-frequency base station antenna provided in Example 1 of the present utility model;

[0034] Figure 4 This is a front structural diagram of a reflector in a multi-frequency base station antenna provided in Example 1 of the present utility model;

[0035] Figure 5 A schematic diagram of the back structure of a reflector in a multi-frequency base station antenna provided in Example 1 of the present utility model;

[0036] Figure 6 A schematic structural diagram of a low-frequency dual-polarization oscillator in a multi-frequency base station antenna provided in Example 1 of the present utility model;

[0037] Figure 7 A schematic structural diagram of an intermediate frequency dual-polarized oscillator in a multi-frequency base station antenna provided in Example 1 of the present utility model;

[0038] Figure 8A schematic structural diagram of a low-frequency phase shifter in a multi-frequency base station antenna provided in Example 1 of the present utility model;

[0039] Figure 9 A schematic structural diagram of an intermediate frequency phase shifter in a multi-frequency base station antenna provided in Example 1 of the present utility model;

[0040] Figure 10 A schematic diagram of the structure of a motor in a multi-frequency base station antenna provided in Example 1 of the present utility model;

[0041] Figure 11 A schematic structural diagram of a scale in a multi-frequency base station antenna provided in Example 1 of the present utility model;

[0042] Figure 12 A schematic diagram of the inner surface structure of the lower end cover of the multi-frequency base station antenna provided in Example 1 of the present utility model;

[0043] Figure 13a This is one of the wiring principle diagrams of the multi-frequency base station antenna provided in Example 1 of the present utility model;

[0044] Figure 13b This is a second schematic diagram of the wiring principle of the multi-frequency base station antenna provided in Example 1 of the present utility model;

[0045] Figure 14 A schematic structural diagram of the reflector and components disposed on the front of the reflector in the multi-frequency base station antenna provided in Example 2 of the present utility model;

[0046] Figure 15a This is a schematic diagram of the wiring principle of a multi-frequency base station antenna provided in Example 2 of the present utility model;

[0047] Figure 15b The second schematic diagram of the wiring principle of the multi-frequency base station antenna provided in Example 2 of the present utility model;

[0048] Figure 16 A schematic structural diagram of the reflector and components disposed on the front of the reflector in the multi-frequency base station antenna provided in Example 3 of the present utility model;

[0049] Figure 17a This is one of the wiring principle diagrams of the multi-frequency base station antenna provided in Example 3 of the present utility model;

[0050] Figure 17b This is the second schematic diagram of the wiring principle of the multi-frequency base station antenna provided in Example 3 of the present utility model.

[0051] In the figure: 1 - mounting plate; 2 - reinforcement connecting plate; 3 - radome; 4 - reflector; 51 - low-frequency dual-polarization oscillator; 52 - intermediate-frequency dual-polarization oscillator; 6 - combiner; 7 - intermediate-frequency one-to-three power splitter board; 81 - low-frequency phase shifter; 82 - intermediate-frequency phase shifter; 9 - support; 10 - motor;

[0052] 11 - scale; 12 - transmission member; 131 - first fixing member; 132 - second fixing member; 14 - joint; 15 - upper end cover; 16 - lower end cover. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0054] It should be noted that, in the description of the present invention, the orientation or positional relationship indicated by the various orientation terms is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Moreover, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. In the description of the present invention, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or system. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the article or system including the element.

[0055] Due to different geographical environments, building coverage solutions for base station antennas, which are highly developed in central and eastern China, are not as effective when directly applied to western China. These solutions fall short of coverage expectations and result in insufficient deep coverage. To address the technical issues of existing base station antennas, such as insufficient deep coverage, severe interference, and high costs, the present invention provides a high-gain "V"-shaped, multi-frequency base station antenna customized for specific application scenarios. This antenna's downtilt angle can be remotely adjusted to change the coverage range of the antenna's main beam, improving coverage while avoiding interference with surrounding base station antennas. Furthermore, the antenna features a simple structure and low cost. This is described in detail below through specific embodiments.

[0056] Example 1:

[0057] like Figures 2 to 10As shown, this embodiment provides a multi-frequency base station antenna, including: a reflector 4, and a low-frequency radiating unit, an intermediate-frequency radiating unit, a low-frequency phase shifter 81, an intermediate-frequency phase shifter 82, a connector 14, a transmission member 12, and a motor 10 arranged on the reflector 4. The low-frequency radiating unit includes a plurality of low-frequency dual-polarization oscillators 51, and the intermediate-frequency radiating unit includes a plurality of intermediate-frequency dual-polarization oscillators 52.

[0058] Low frequency refers to the 698-960MHz frequency band, and medium frequency refers to the 1710-2690MHz frequency band. The vibrator is the core component of the antenna, which has the function of guiding and amplifying electromagnetic waves, making the electromagnetic signal received by the antenna stronger. Figure 6 and Figure 7 As shown, both the low-frequency dual-polarization oscillator 51 and the medium-frequency dual-polarization oscillator 52 are metal die-cast oscillators. This type of oscillator is light in weight, high in strength, corrosion-resistant, and has stable performance, thereby reducing the weight of the antenna as much as possible and meeting the requirement for stable antenna performance. Figure 8 and Figure 9 As shown, the low-frequency phase shifter 81 / intermediate-frequency phase shifter 82 can adjust the downtilt angle of the antenna beam by changing the relative phase between the low-frequency dual-polarization oscillator 51 / intermediate-frequency dual-polarization oscillator 52, thereby facilitating the optimization of the communication network.

[0059] Since both the mid- and low-frequency oscillators are made of metal die-cast oscillators, combined with mid- and low-frequency phase shifters, the weight of the antenna is reduced as much as possible to meet the requirements of stable antenna performance.

[0060] The motor 10 may be a RCU (Remote Control Unit) motor.

[0061] Among them, the specific number of the low-frequency dual-polarization vibrator 51, the intermediate-frequency dual-polarization vibrator 52, the low-frequency phase shifter 81, the intermediate-frequency phase shifter 82, the connector 14, the transmission member 12 and the output end of the motor 10 can be set and adjusted according to actual conditions.

[0062] Specifically, the positive polarization signals and negative polarization signals of multiple low-frequency dual-polarization oscillators 51 are connected to at least one low-frequency phase shifter 81, each low-frequency phase shifter 81 is connected to two corresponding connectors 14, and the positive polarization signals and negative polarization signals of multiple intermediate-frequency dual-polarization oscillators 52 are connected to at least one intermediate-frequency phase shifter 82, each intermediate-frequency phase shifter 82 is connected to two corresponding connectors 14, and each connector 14 is connected to a cable.

[0063] By using low-frequency phase shifters and intermediate-frequency phase shifters, the phase of the power signal obtained by each low-frequency dual-polarization element and each intermediate-frequency dual-polarization element in the antenna array can be changed, thereby completing the large downtilt of the main beam in the vertical plane, realizing the split large downtilt electrical adjustment technology, and meeting the coverage of the bottom buildings.

[0064] Furthermore, the two connectors 14 corresponding to each low-frequency phase shifter 81 respectively input or output one positive polarization signal and one negative polarization signal, that is, one connector 14 corresponding to each low-frequency phase shifter 81 inputs or outputs one positive polarization signal, and the other connector 14 corresponding to each low-frequency phase shifter 81 inputs or outputs one negative polarization signal. The two connectors 14 corresponding to each intermediate frequency phase shifter 82 input or output two positive polarization signals or two negative polarization signals, that is, the two connectors 14 corresponding to some intermediate frequency phase shifters 82 input or output two positive polarization signals, and the two connectors 14 corresponding to some intermediate frequency phase shifters 82 input or output two negative polarization signals. Therefore, the number of intermediate frequency phase shifters 82 should be an even number, and every two intermediate frequency phase shifters 82 can be regarded as a group, and the two connectors 14 corresponding to one intermediate frequency phase shifter 82 in a group of intermediate frequency phase shifters 82 input or output two positive polarization signals, and the two connectors 14 corresponding to another intermediate frequency phase shifter 82 in a group of intermediate frequency phase shifters 82 input or output two negative polarization signals.

[0065] by Figure 5 For example, it includes two low-frequency phase shifters 81, two intermediate-frequency phase shifters 82, and eight connectors 14. One low-frequency phase shifter 81 is connected to two connectors, namely, the first connector and the second connector. The first connector inputs or outputs a positive polarization signal, and the second connector inputs or outputs a negative polarization signal. Another low-frequency phase shifter 81 is connected to two connectors, namely, the third connector and the fourth connector. The third connector inputs or outputs a positive polarization signal, and the fourth connector inputs or outputs a negative polarization signal. One intermediate-frequency phase shifter 82 is connected to two connectors, namely, the fifth connector and the sixth connector. The fifth connector inputs or outputs a positive polarization signal, and the sixth connector inputs or outputs a positive polarization signal. Another intermediate-frequency phase shifter 82 is connected to two connectors, namely, the seventh connector and the eighth connector. The seventh connector inputs or outputs a negative polarization signal, and the eighth connector inputs or outputs a negative polarization signal.

[0066] Each low-frequency phase shifter 81 and each intermediate-frequency phase shifter 82 is connected to a corresponding output terminal of the motor 10 via a corresponding transmission member 12. The motor 10 is also connected to an external host device via a control line, for receiving control instructions from the external host device and controlling the operation of the corresponding output terminal in accordance with the control instructions. Driven by the output terminal of the motor 10, each transmission member 12 is used to convert the rotational motion of the corresponding output terminal of the motor 10 into linear motion and transmit it to the corresponding low-frequency phase shifter 81 or intermediate-frequency phase shifter 82. Because a variety of transmission structures capable of converting rotational motion into linear motion are known in the prior art, the specific structure of the transmission structure will not be described in detail in this utility model.

[0067] Due to the use of built-in motor technology, the external main device can remotely adjust the antenna's downtilt angle through the motor and transmission parts of the motor. The downtilt angle of the antenna is adjusted electronically to change the main beam coverage range of the antenna radiation. It is simple and convenient to use and has a beautiful appearance.

[0068] by Figure 5 For example, a total of four transmission members 12 are included, namely the first to fourth transmission members, and the motor 10 has four output ends, namely the first to fourth output ends. The first transmission member corresponds to the first output end of the motor, the second transmission member corresponds to the second output end of the motor, the third transmission member corresponds to the third output end of the motor, and the fourth transmission member corresponds to the fourth output end of the motor. Among them, a low-frequency phase shifter 81 is connected to the first output end of the motor 10 through a corresponding first transmission member, and the first transmission member converts the rotational motion of the first output end of the motor 10 into linear motion and transmits it to a corresponding low-frequency phase shifter 81; another low-frequency phase shifter 81 is connected to the second output end of the motor 10 through a corresponding second transmission member, and the second transmission member converts the rotational motion of the second output end of the motor 10 into linear motion and transmits it to another corresponding low-frequency phase shifter 81; an intermediate frequency phase shifter 82 is connected to the third output end of the motor 10 through a corresponding third transmission member, and the third transmission member converts the rotational motion of the third output end of the motor 10 into linear motion and transmits it to a corresponding intermediate frequency phase shifter 82; another intermediate frequency phase shifter 82 is connected to the fourth output end of the motor 10 through a corresponding fourth transmission member, and the fourth transmission member converts the rotational motion of the fourth output end of the motor 10 into linear motion and transmits it to another corresponding intermediate frequency phase shifter 82.

[0069] In this embodiment, the multi-frequency base station antenna has both a low-frequency radiation unit and a medium-frequency radiation unit, realizing the integration of multiple frequency bands, which can simultaneously meet the network coverage requirements of multiple frequency bands. It also realizes that a single multi-frequency multi-mode antenna replaces multiple antennas of different frequency bands, reducing the overall volume of the multi-frequency base station antenna; by setting a low-frequency phase shifter, a medium-frequency phase shifter, a transmission part and a motor, the downtilt angle of the antenna can be remotely adjusted, the coverage range of the main beam radiated by the antenna can be changed, the coverage rate can be improved, and the impact on surrounding base station antennas can be avoided; moreover, the multi-frequency base station antenna is simple and convenient to install at a low cost.

[0070] In a specific embodiment, Figure 4 and Figure 5 As shown, the edge of the reflector 4 is bent upward to form a wall. Figure 2 As shown, the low frequency radiation unit and the intermediate frequency radiation unit are located in front of the reflector 4. Figure 3 As shown, the low-frequency phase shifter 81 , the medium-frequency phase shifter 82 , the transmission member 12 and the motor 10 are located on the back of the reflection plate 4 .

[0071] In this embodiment, the low-frequency dual-polarization oscillator 51 and the intermediate-frequency dual-polarization oscillator 52 can be connected to the front surface of the reflector 4 via bolts, and the low-frequency phase shifter 81, the intermediate-frequency phase shifter 82, the transmission member 12, and the motor 10 can be connected to the back surface of the reflector 4 via bolts. By centrally arranging the low-frequency dual-polarization oscillator 51 and the intermediate-frequency dual-polarization oscillator 52 on the front surface of the reflector 4 and arranging the low-frequency phase shifter 81, the intermediate-frequency phase shifter 82, the transmission member 12, and the motor 10 on the back surface of the reflector 4, the space on the reflector 4 is rationally utilized, making the entire antenna structure more compact, correspondingly reducing the overall size of the antenna, and simplifying and convenient installation.

[0072] The reflector 4 may be a rectangular plate structure with 90-degree bent walls formed on its four sides to protect the low-frequency dual-polarization vibrator 51 and the medium-frequency dual-polarization vibrator 52 installed thereon.

[0073] In a specific embodiment, Figure 1 As shown, the multi-frequency base station antenna further includes: a radome 3 , an upper end cover 15 and a lower end cover 16 .

[0074] Among them, the antenna cover 3 is a hollow structure with openings at both ends, and a placement chamber is provided therein. The reflector 4 is located in the placement chamber. Correspondingly, the low-frequency radiation unit, the intermediate-frequency radiation unit, the low-frequency phase shifter 81, the intermediate-frequency phase shifter 82, the transmission part 12 and the motor 10 are also located in the placement chamber; the upper end cover 15 and the lower end cover 16 are respectively arranged at the upper and lower ends of the antenna cover 3.

[0075] like Figure 1 As shown, the radome 3 is a rectangular parallelepiped structure with a slightly curved surface. Its front side is a slightly curved surface, and its side and back sides are flat. The front side of the reflector 4 faces the front side of the radome 3, and the back side of the reflector 4 faces the back side of the radome 3.

[0076] The radome 3, the upper end cover 15 and the lower end cover 16 can all be made of fiberglass or UPVC. These two materials have the advantages of high strength and light weight, are easy to install and use, and can prevent rust.

[0077] like Figure 2 and Figure 4 As shown, the end of the reflector 4 corresponding to the lower end cover 16 is bent upward to form a joint surface, and each joint 14 is arranged on the joint surface. Figure 12 As shown, the lower end cover 16 is provided with through holes at positions corresponding to the respective joints 14, and the number of the joints is the same as that of the joints. Each joint 14 is detachably connected to the joint surface of the reflector 4 through the corresponding through hole in the lower end cover 16. The lower end cover 16 can also be connected to the joint surface of the reflector 4 by bolts, thereby mounting the joint surface of the reflector 4 on the lower end cover 16.

[0078] In this embodiment, in addition to multiple through holes for each joint 14 to pass through, the lower end cover 16 can also be provided with multiple bolt through holes, and the joint surface connection between the lower end cover 16 and the reflector 4 is achieved by stainless steel bolts passing through the bolt through holes on the lower end cover 16.

[0079] In a specific embodiment, Figure 3 As shown, a plurality of support members 9 are provided on the back of the reflector 4 , and the support members 9 can be installed on the back of the reflector 4 by bolts. The plurality of support members 9 are detachably connected to the inner surface of the back of the antenna cover 3 .

[0080] In this embodiment, multiple supports 9 are provided between the reflector 4 and the back surface of the radome 3, which serve to mount the reflector 4 on the radome 3 via the supports 9. By mounting the low-frequency dual-polarization oscillator 51, the intermediate-frequency dual-polarization oscillator 52, the low-frequency phase shifter 81, the intermediate-frequency phase shifter 82, the transmission member 12, the motor 10, and the connector 14 on a single reflector 4, the overall size of the antenna is effectively reduced.

[0081] In a specific embodiment, Figure 1 As shown, a plurality of mounting plates 1 are also provided on the outer surface of the back side of the antenna cover 3, and the plurality of mounting plates 1 are detachably connected to the outer surface of the back side of the antenna cover 3, and each mounting plate 1 corresponds to the position of a group of support members, and each group of support members includes at least one support member 9.

[0082] For example, two mounting plates 1 are used, and each mounting plate 1 corresponds to a group of support members. Each group of support members includes two support members, one group of support members is arranged on the back side of the reflector 4 near the upper end cover 15, and the other group of support members is arranged on the back side of the reflector 4 near the lower end cover 16. Each mounting plate 1 and the corresponding group of support members 9 are fixed to the antenna cover 3 by bolts, so that the antenna cover 3 is fixed to the support members 9 through the mounting plate 1.

[0083] In this embodiment, the mounting plate 1 can be a two-ear structure, specifically made of metal, such as stainless steel. By arranging the mounting plate 1 on the outer surface of the back of the antenna cover 3, it is convenient to fix the multi-band base station antenna on a fixture or bracket.

[0084] In a specific embodiment, Figure 1 As shown, a reinforcing connecting plate 2 is also provided on the outer surface of the back of the antenna cover 3. The reinforcing connecting plate 2 is detachably connected to the outer surface of the back of the antenna cover 3, and the position of the reinforcing connecting plate 2 corresponds to a group of support members, each group of support members includes at least one support member 9.

[0085] In this embodiment, the reinforcement connecting plate 2 can be a rectangular plate-shaped structure, specifically made of metal, such as stainless steel. The reinforcement connecting plate 2 and a corresponding set of support members 9 are fixed to the radome 3 via bolts. This allows the radome 3 to be further secured to the support members 9 via the reinforcement connecting plate 2, further improving the reliability of the securement between the radome 3 and the reflector 4.

[0086] In a specific embodiment, Figure 2 、 Figure 3 and Figure 11 As shown, the multi-frequency base station antenna further includes: scales 11. The number of scales 11, the number of transmission members 12, and the number of output terminals of the motor 10 are all the same, each scale 11 corresponds to a transmission member 12, and each transmission member 12 corresponds to an output terminal of the motor 10.

[0087] Of course, the end of the scale 11 marked with scales should extend outside the radome 3. Accordingly, the lower end cover 16 is provided with through holes corresponding to the positions of the scales 11, and the scales 11 extend outside the radome 3 through their corresponding through holes.

[0088] Specifically, each scale 11 is connected to a portion of a corresponding transmission member 12 that performs linear motion. In order to make the overall structure of the antenna more compact, each scale 11 is arranged above the motor 10. Each scale 11 passes through a first fixing member 131 and is slidably connected to the first fixing member 131. The first fixing member 131 is connected to the back of the reflector 4, and the first fixing member 131 is located directly above the motor 10. The portion of each transmission member that performs linear motion passes through at least one second fixing member 132 (for example, 3 to 4) and is slidably connected to the second fixing member 132. The second fixing member 132 is also connected to the back of the reflector 4.

[0089] In this embodiment, by providing a corresponding scale 11 for each transmission member 12, the user can easily observe the movement of each scale 11 and thereby understand the phase adjustment status of the corresponding low-frequency phase shifter 81 or intermediate-frequency phase shifter 82. By providing a first fixing member 131 for each scale 11, it is ensured that each scale 11 moves smoothly back and forth, driven by the linear motion portion of the corresponding transmission member 12. By providing at least one second fixing member 132 for each linear motion portion of the transmission member 12, it is ensured that each linear motion portion of the transmission member 12 moves smoothly back and forth.

[0090] In a specific embodiment, Figure 2As shown, the low-frequency radiating unit includes two groups of low-frequency dual-polarization dipoles 51, and the intermediate-frequency radiating unit includes four groups of intermediate-frequency dual-polarization dipoles 52. The two groups of low-frequency dual-polarization dipoles 51 are arranged in two straight lines, with each group of low-frequency dual-polarization dipoles arranged in a straight line. The first and second groups of intermediate-frequency dual-polarization dipoles in the four groups of intermediate-frequency dual-polarization dipoles 52 are arranged in two straight lines, with the first group of intermediate-frequency dual-polarization dipoles arranged in one straight line and the second group of intermediate-frequency dual-polarization dipoles arranged in another straight line, both located between the two straight lines formed by the two groups of low-frequency dual-polarization dipoles 51. The third and fourth groups of intermediate-frequency dual-polarization dipoles in the four groups of intermediate-frequency dual-polarization dipoles 52 are located on either side of the first and second groups of intermediate-frequency dual-polarization dipoles, respectively. The third group of intermediate-frequency dual-polarization dipoles is located to the left of the first group of intermediate-frequency dual-polarization dipoles, and the fourth group of intermediate-frequency dual-polarization dipoles is located to the right of the second group of intermediate-frequency dual-polarization dipoles.

[0091] In a specific embodiment, Figure 2 As shown, adjacent intermediate frequency dual-polarization vibrators in the third group of intermediate frequency dual-polarization vibrators are staggered to form two straight lines, wherein the first straight line coincides with a straight line formed by a group of low-frequency dual-polarization vibrators, and the intermediate frequency dual-polarization vibrators located on the first straight line are respectively arranged inside this group of low-frequency dual-polarization vibrators. Of course, if the number of intermediate frequency dual-polarization vibrators located on the first straight line is less than the number of low-frequency dual-polarization vibrators in this group, then no intermediate frequency dual-polarization vibrator is arranged inside the last low-frequency dual-polarization vibrator in the straight line direction, and the intermediate frequency dual-polarization vibrators on the second straight line are arranged at equal intervals from the first and second groups of intermediate frequency dual-polarization vibrators.

[0092] In a specific embodiment, Figure 2 As shown, adjacent intermediate frequency dual-polarization vibrators in the fourth group of intermediate frequency dual-polarization vibrators are staggered to form two straight lines, wherein the first straight line coincides with the straight line formed by another group of low-frequency dual-polarization vibrators, and the intermediate frequency dual-polarization vibrators located on the first straight line are respectively arranged inside the other group of low-frequency dual-polarization vibrators, wherein the intermediate frequency dual-polarization vibrators on the second straight line are arranged at equal intervals from the first and second groups of intermediate frequency dual-polarization vibrators.

[0093] In this embodiment, the low-frequency dual-polarization oscillator 51 and the medium-frequency dual-polarization oscillator 52 are arranged in the above manner, which can further effectively utilize the space on the reflector 4 and make the antenna structure more compact.

[0094] In a specific embodiment, Figure 2 As shown, two groups of low-frequency dual-polarization oscillators correspond to two low-frequency phase shifters 81, wherein each group of low-frequency dual-polarization oscillators includes 7 low-frequency dual-polarization oscillators 51. Four groups of intermediate-frequency dual-polarization oscillators correspond to two intermediate-frequency phase shifters 82, wherein each group of intermediate-frequency dual-polarization oscillators includes 12 intermediate-frequency dual-polarization oscillators 52.

[0095] like Figure 13aAs shown, the positive polarization signals and negative polarization signals of two low-frequency dual-polarization oscillators 51 in each group of low-frequency dual-polarization oscillators are each combined into one positive polarization signal and one negative polarization signal through a low-frequency one-to-two power splitter, and then connected to a low-frequency phase shifter 81. The positive polarization signals and negative polarization signals of the other two low-frequency dual-polarization oscillators 51 in each group of low-frequency dual-polarization oscillators are each combined into one positive polarization signal and one negative polarization signal through a low-frequency one-to-two power splitter, and then connected to the same low-frequency phase shifter 81. The positive polarization signals and negative polarization signals of the remaining three low-frequency dual-polarization oscillators 51 in each group of low-frequency dual-polarization oscillators are directly connected to the same low-frequency phase shifter 81. Accordingly, each low-frequency phase shifter 81 receives five positive polarization signals and five negative polarization signals corresponding to a group of low-frequency dual-polarization oscillators.

[0096] like Figure 13b As shown, each group of intermediate frequency dual-polarization oscillators is divided into four small groups of intermediate frequency dual-polarization oscillators, and each group of intermediate frequency dual-polarization oscillators includes three intermediate frequency dual-polarization oscillators 52. The positive polarization signal and the negative polarization signal of each group of intermediate frequency dual-polarization oscillators are respectively synthesized into one positive polarization signal and one negative polarization signal through an intermediate frequency one-to-three power splitter board 7. Then, the four small groups of intermediate frequency dual-polarization oscillators correspond to four positive polarization signals and four negative polarization signals. The four positively polarized signals corresponding to each group of IF dual-polarized oscillators are combined into two positively polarized signals through a combiner 6 and then connected to the first IF phase shifter 82. The four negatively polarized signals corresponding to each group of IF dual-polarized oscillators are combined into two negatively polarized signals through another combiner 6 and then connected to the second IF phase shifter 82. Therefore, a total of eight combiners 6 are required for the four groups of IF dual-polarized oscillators. Four combiners 6 for combining the two positively polarized signals are connected to the first IF phase shifter 82, and the other four combiners 6 for combining the two negatively polarized signals are connected to the second IF phase shifter 82. Accordingly, the first IF phase shifter 82 receives eight positively polarized signals, and the second IF phase shifter 82 receives eight negatively polarized signals.

[0097] The IF 1-to-3 power splitter board 7 can be made of high-frequency RF circuit board material to reduce internal antenna feed losses. The LF 1-to-2 power splitter and IF 1-to-3 power splitter board 7 are mounted on the back of the reflector 4, while the combiner 6 is mounted on the front of the reflector 4. Furthermore, the LF 1-to-2 power splitter, IF 1-to-3 power splitter board 7, and combiner 6 can be connected to the reflector 4 via bolts.

[0098] like Figure 13a and Figure 13b As shown, the external main device is connected to the four input terminals of the motor 10 through control lines, the two output terminals of the motor 10 are connected to the two low-frequency phase shifters 81 through two transmission parts 12 respectively, and the other two output terminals of the motor 10 are connected to the two medium-frequency phase shifters 82 through two transmission parts 12 respectively, and each transmission part 12 is connected to a scale 11 respectively.

[0099] The multi-frequency base station antenna provided in this embodiment, through the coordinated operation of its various components, forms a device that integrates 4+4 ports (i.e., 4 ports for low frequency and 4 ports for medium frequency), "V"-shaped radiation, wide coverage, low energy consumption, and split large downtilt angle electrical adjustment technology. It has a stable structure, simple installation, convenient operation, low manufacturing and maintenance costs, and high safety and reliability. At the same time, it meets the requirements of a high-gain "V"-shaped multi-frequency base station antenna design that can be applied to other base station antenna designs. It can achieve capacity expansion through cell splitting with the same number of frequency points, while taking into account the high gain characteristics of the antenna to enhance coverage, helping to solve the problem of insufficient deep coverage in old urban areas.

[0100] Example 2:

[0101] This embodiment provides another multi-frequency base station antenna. The difference between the multi-frequency base station antenna in this embodiment and that in Example 1 is only that the number of oscillators of the low-frequency radiation unit and the intermediate-frequency radiation unit on the reflector 4 is different, and accordingly the number and type of the low-frequency power divider and the intermediate-frequency power divider board also change accordingly.

[0102] Specifically, in this embodiment, Figure 14 As shown, two groups of low-frequency dual-polarization oscillators correspond to two low-frequency phase shifters 81, wherein each group of low-frequency dual-polarization oscillators includes five low-frequency dual-polarization oscillators 51. Four groups of intermediate-frequency dual-polarization oscillators correspond to two intermediate-frequency phase shifters 82, wherein each group of intermediate-frequency dual-polarization oscillators includes eight intermediate-frequency dual-polarization oscillators 52.

[0103] like Figure 15a As shown, the positive polarization signals and negative polarization signals of the five low-frequency dual-polarization oscillators 51 in each group of low-frequency dual-polarization oscillators are directly connected to the same low-frequency phase shifter 81. Accordingly, each low-frequency phase shifter 81 receives five positive polarization signals and five negative polarization signals corresponding to a group of low-frequency dual-polarization oscillators;

[0104] like Figure 15bAs shown, each group of intermediate frequency dual-polarization oscillators is divided into four small groups of intermediate frequency dual-polarization oscillators, and each group of intermediate frequency dual-polarization oscillators includes two intermediate frequency dual-polarization oscillators 52. The positive polarization signal and the negative polarization signal of each group of intermediate frequency dual-polarization oscillators are respectively synthesized into one positive polarization signal and one negative polarization signal through an intermediate frequency one-to-two power splitter board. Then, the four small groups of intermediate frequency dual-polarization oscillators correspond to four positive polarization signals and four negative polarization signals. The four positively polarized signals corresponding to each group of IF dual-polarized oscillators are combined into two positively polarized signals through a combiner 6 and then connected to the first IF phase shifter 82. The four negatively polarized signals corresponding to each group of IF dual-polarized oscillators are combined into two negatively polarized signals through another combiner 6 and then connected to the second IF phase shifter 82. Therefore, a total of eight combiners 6 are required for the four groups of IF dual-polarized oscillators. Four combiners 6 for combining the two positively polarized signals are connected to the first IF phase shifter 82, and the other four combiners 6 for combining the two negatively polarized signals are connected to the second IF phase shifter 82. Accordingly, the first IF phase shifter 82 receives eight positively polarized signals, and the second IF phase shifter 82 receives eight negatively polarized signals.

[0105] The IF power splitter board can be made of high-frequency RF circuit board to reduce internal antenna feed losses. The IF power splitter board is mounted on the back of reflector 4, while the combiner 6 is mounted on the front of reflector 4. Furthermore, the IF power splitter board and combiner 6 can be connected to reflector 4 via bolts.

[0106] like Figure 15a and Figure 15b As shown, the external main device is connected to the four input terminals of the motor 10 through control lines, the two output terminals of the motor 10 are connected to the two low-frequency phase shifters 81 through two transmission parts 12 respectively, and the other two output terminals of the motor 10 are connected to the two medium-frequency phase shifters 82 through two transmission parts 12 respectively, and each transmission part 12 is connected to a scale 11 respectively.

[0107] Example 3:

[0108] This embodiment provides another multi-frequency base station antenna. The difference between the multi-frequency base station antenna in this embodiment and that in Example 1 is only that the number of oscillators of the low-frequency radiation unit and the intermediate-frequency radiation unit on the reflector 4 is different, and accordingly the number and type of low-frequency power dividers and intermediate-frequency power divider boards also change accordingly.

[0109] Specifically, in this embodiment, Figure 16 As shown, two groups of low-frequency dual-polarization oscillators correspond to two low-frequency phase shifters 81, wherein each group of low-frequency dual-polarization oscillators includes 9 low-frequency dual-polarization oscillators 51. Four groups of intermediate-frequency dual-polarization oscillators correspond to two intermediate-frequency phase shifters 82, wherein each group of intermediate-frequency dual-polarization oscillators includes 16 intermediate-frequency dual-polarization oscillators 52.

[0110] like Figure 17aAs shown, the positive polarization signals and negative polarization signals of the three low-frequency dual-polarization oscillators 51 in each group of low-frequency dual-polarization oscillators are each combined into one positive polarization signal and one negative polarization signal through a low-frequency one-to-three power splitter, and then connected to a low-frequency phase shifter 81. The positive polarization signals and negative polarization signals of the other three low-frequency dual-polarization oscillators 51 in each group of low-frequency dual-polarization oscillators are each combined into one positive polarization signal and one negative polarization signal through a low-frequency one-to-three power splitter, and then connected to the same low-frequency phase shifter 81. The positive polarization signals and negative polarization signals of the remaining three low-frequency dual-polarization oscillators 51 in each group of low-frequency dual-polarization oscillators are directly connected to the same low-frequency phase shifter 81. Accordingly, each low-frequency phase shifter 81 receives five positive polarization signals and five negative polarization signals corresponding to a group of low-frequency dual-polarization oscillators.

[0111] like Figure 17b As shown, each group of intermediate frequency dual-polarization oscillators is divided into four small groups of intermediate frequency dual-polarization oscillators, and each group of intermediate frequency dual-polarization oscillators includes four intermediate frequency dual-polarization oscillators 52. The positive polarization signal and the negative polarization signal of each group of intermediate frequency dual-polarization oscillators are respectively synthesized into one positive polarization signal and one negative polarization signal through an intermediate frequency one-to-four power splitter board. Then, the four small groups of intermediate frequency dual-polarization oscillators correspond to four positive polarization signals and four negative polarization signals. The four positively polarized signals corresponding to each group of IF dual-polarized oscillators are combined into two positively polarized signals through a combiner 6 and then connected to the first IF phase shifter 82. The four negatively polarized signals corresponding to each group of IF dual-polarized oscillators are combined into two negatively polarized signals through another combiner 6 and then connected to the second IF phase shifter 82. Therefore, a total of eight combiners 6 are required for the four groups of IF dual-polarized oscillators. Four combiners 6 for combining the two positively polarized signals are connected to the first IF phase shifter 82, and the other four combiners 6 for combining the two negatively polarized signals are connected to the second IF phase shifter 82. Accordingly, the first IF phase shifter 82 receives eight positively polarized signals, and the second IF phase shifter 82 receives eight negatively polarized signals.

[0112] The IF 1-to-4 power splitter board can be made of high-frequency RF circuit board to reduce internal antenna feed losses. The LF 1-to-3 power splitter and IF 1-to-4 power splitter board are mounted on the back of reflector 4, while the combiner 6 is mounted on the front of reflector 4. Furthermore, the LF 1-to-3 power splitter, IF 1-to-4 power splitter board, and combiner 6 can be connected to reflector 4 via bolts.

[0113] like Figure 17a and Figure 17b As shown, the external main device is connected to the four input terminals of the motor 10 through control lines, the two output terminals of the motor 10 are connected to the two low-frequency phase shifters 81 through two transmission parts 12 respectively, and the other two output terminals of the motor 10 are connected to the two medium-frequency phase shifters 82 through two transmission parts 12 respectively, and each transmission part 12 is connected to a scale 11 respectively.

[0114] The multi-frequency base station antenna provided by the embodiment of the present utility model has the following characteristics:

[0115] (1) The combiner uses a Butler matrix network to achieve antenna "V" radiation function, while increasing the gain from 18dBi to 20dBi. The antenna "V" radiation can form a cell splitting function, enhance signal strength, and increase cell capacity.

[0116] (2) A combination of cellular ultra-low-loss cables, a feed network including self-developed air cavity connectors, and a power splitter board made of RF high-frequency circuit boards is used to minimize the internal feed network loss of the antenna.

[0117] (3) Both the low-frequency phase shifter and the intermediate-frequency phase shifter adopt a modular design to form a low-insertion-loss modular integration solution, realizing the integration of low-insertion-loss phase shifters and feeding networks, and the integration of high-radiation-efficiency radiating units and low-insertion-loss feeders, thereby minimizing the internal loss of the antenna and improving the antenna gain and efficiency.

[0118] (4) Using multi-layer circuit design, usually based on microstrip or waveguide technology, it can operate within a specific frequency range and maintain high phase accuracy and low insertion loss. It is one of the key technologies for realizing broadband Butler matrix.

[0119] (5) A coupled series-fed phase shifter is used to obtain the phase shift required for a large downtilt angle through series feeding. This can change the phase of the power signal obtained by each oscillator in the antenna array, thereby achieving a large downtilt of the main beam in the vertical plane and realizing split large downtilt electrical adjustment technology to meet the coverage of ground floor buildings.

[0120] (6) The technology is scalable and can be designed to realize a 4+4 low-medium frequency high-gain "V"-shaped base station antenna. This technology can also be applied to other base station antenna designs, such as 4+8 low-medium frequency antennas, 4+4 medium-high frequency antennas, and 4+8 medium-high frequency antennas.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-frequency base station antenna, characterized in that: include: A reflector, and a low-frequency radiation unit, an intermediate-frequency radiation unit, a low-frequency phase shifter, an intermediate-frequency phase shifter, a connector, a transmission member, and a motor arranged on the reflector, wherein the low-frequency radiation unit includes a plurality of low-frequency dual-polarization vibrators, and the intermediate-frequency radiation unit includes a plurality of intermediate-frequency dual-polarization vibrators; the positive polarization signals and negative polarization signals of the plurality of low-frequency dual-polarization vibrators are connected to at least one low-frequency phase shifter, each low-frequency phase shifter is connected to two corresponding connectors, and the positive polarization signals and negative polarization signals of the plurality of intermediate-frequency dual-polarization vibrators are connected to at least one intermediate-frequency phase shifter, each intermediate-frequency phase shifter is connected to two corresponding connectors, and each connector is connected to a cable; each low-frequency phase shifter and each intermediate-frequency phase shifter is respectively connected to a corresponding output end of the motor through a corresponding transmission member, and the motor is also connected to an external main device through a control line, for receiving control instructions from the external main device and controlling the corresponding output end action according to the control instructions, and each transmission member is used to convert the rotational motion of the corresponding output end of the motor into linear motion and transmit it to the corresponding low-frequency phase shifter or intermediate-frequency phase shifter.

2. The multi-frequency base station antenna according to claim 1, characterized in that: The low-frequency radiation unit includes two groups of low-frequency dual-polarization vibrators, and the intermediate-frequency radiation unit includes four groups of intermediate-frequency dual-polarization vibrators; the two groups of low-frequency dual-polarization vibrators are arranged in two straight lines, the first group and the second group of intermediate-frequency dual-polarization vibrators in the four groups of intermediate-frequency dual-polarization vibrators are arranged in two straight lines and are located in the middle of the two straight lines formed by the two groups of low-frequency dual-polarization vibrators, and the third group and the fourth group of intermediate-frequency dual-polarization vibrators in the four groups of intermediate-frequency dual-polarization vibrators are respectively located on both sides of the first group and the second group of intermediate-frequency dual-polarization vibrators.

3. The multi-frequency base station antenna according to claim 2, characterized in that: Adjacent intermediate frequency dual-polarization vibrators in the third group of intermediate frequency dual-polarization vibrators are staggered to form two straight lines, wherein the first straight line coincides with a straight line formed by a group of low-frequency dual-polarization vibrators, and the intermediate frequency dual-polarization vibrators located on the first straight line are respectively arranged inside the group of low-frequency dual-polarization vibrators, wherein the intermediate frequency dual-polarization vibrators on the second straight line are arranged at equal intervals from the first and second groups of intermediate frequency dual-polarization vibrators; and / or, Adjacent intermediate frequency dual-polarization vibrators in the fourth group of intermediate frequency dual-polarization vibrators are arranged in an staggered manner to form two straight lines, wherein the first straight line coincides with the straight line formed by another group of low-frequency dual-polarization vibrators, and the intermediate frequency dual-polarization vibrators located on the first straight line are respectively arranged inside the other group of low-frequency dual-polarization vibrators, wherein the intermediate frequency dual-polarization vibrators on the second straight line are arranged at equal intervals from the first and second groups of intermediate frequency dual-polarization vibrators.

4. The multi-frequency base station antenna according to claim 2, characterized in that: The two groups of low-frequency dual-polarization oscillators correspond to two low-frequency phase shifters, wherein each group of low-frequency dual-polarization oscillators includes 7 low-frequency dual-polarization oscillators; the four groups of intermediate-frequency dual-polarization oscillators correspond to two intermediate-frequency phase shifters, wherein each group of intermediate-frequency dual-polarization oscillators includes 12 intermediate-frequency dual-polarization oscillators; The positive polarization signals and negative polarization signals of the two low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are each synthesized into one positive polarization signal and one negative polarization signal through a low-frequency one-to-two power splitter and then connected to a low-frequency phase shifter. The positive polarization signals and negative polarization signals of the other two low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are each synthesized into one positive polarization signal and one negative polarization signal through a low-frequency one-to-two power splitter and then connected to the same low-frequency phase shifter. The positive polarization signals and negative polarization signals of the remaining three low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are directly connected to the same low-frequency phase shifter; each low-frequency phase shifter is connected to five positive polarization signals and five negative polarization signals corresponding to a group of low-frequency dual-polarization vibrators; Each group of intermediate frequency dual-polarization oscillators is divided into four small groups of intermediate frequency dual-polarization oscillators, and each small group of intermediate frequency dual-polarization oscillators includes three intermediate frequency dual-polarization oscillators. The positive polarization signal and the negative polarization signal of each small group of intermediate frequency dual-polarization oscillators are respectively synthesized into one positive polarization signal and one negative polarization signal through an intermediate frequency one-to-three power splitter board. The four positive polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two positive polarization signals through a combiner and then connected to the first intermediate frequency phase shifter. The four negative polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two negative polarization signals through another combiner and then connected to the second intermediate frequency phase shifter; the first intermediate frequency phase shifter is connected to eight positive polarization signals, and the second intermediate frequency phase shifter is connected to eight negative polarization signals.

5. The multi-frequency base station antenna according to claim 2, characterized in that: The two groups of low-frequency dual-polarization oscillators correspond to two low-frequency phase shifters, wherein each group of low-frequency dual-polarization oscillators includes 5 low-frequency dual-polarization oscillators; the four groups of intermediate-frequency dual-polarization oscillators correspond to two intermediate-frequency phase shifters, wherein each group of intermediate-frequency dual-polarization oscillators includes 8 intermediate-frequency dual-polarization oscillators; The positive polarization signals and negative polarization signals of the five low-frequency dual-polarization oscillators in each group of low-frequency dual-polarization oscillators are directly connected to the same low-frequency phase shifter; each low-frequency phase shifter is connected to five positive polarization signals and five negative polarization signals corresponding to a group of low-frequency dual-polarization oscillators; Each group of intermediate frequency dual-polarization oscillators is divided into four small groups of intermediate frequency dual-polarization oscillators, and each small group of intermediate frequency dual-polarization oscillators includes two intermediate frequency dual-polarization oscillators. The positive polarization signal and the negative polarization signal of each small group of intermediate frequency dual-polarization oscillators are respectively synthesized into one positive polarization signal and one negative polarization signal through an intermediate frequency one-to-two power splitter board. The four positive polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two positive polarization signals through a combiner and then connected to the first intermediate frequency phase shifter. The four negative polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two negative polarization signals through another combiner and then connected to the second intermediate frequency phase shifter; the first intermediate frequency phase shifter is connected to eight positive polarization signals, and the second intermediate frequency phase shifter is connected to eight negative polarization signals.

6. The multi-frequency base station antenna according to claim 2, characterized in that: The two groups of low-frequency dual-polarization oscillators correspond to two low-frequency phase shifters, wherein each group of low-frequency dual-polarization oscillators includes 9 low-frequency dual-polarization oscillators; the four groups of intermediate-frequency dual-polarization oscillators correspond to two intermediate-frequency phase shifters, wherein each group of intermediate-frequency dual-polarization oscillators includes 16 intermediate-frequency dual-polarization oscillators; The positive polarization signals and negative polarization signals of the three low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are each synthesized into one positive polarization signal and one negative polarization signal through a low-frequency one-to-three power splitter and then connected to a low-frequency phase shifter. The positive polarization signals and negative polarization signals of the other three low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are each synthesized into one positive polarization signal and one negative polarization signal through a low-frequency one-to-three power splitter and then connected to the same low-frequency phase shifter. The positive polarization signals and negative polarization signals of the remaining three low-frequency dual-polarization vibrators in each group of low-frequency dual-polarization vibrators are directly connected to the same low-frequency phase shifter; each low-frequency phase shifter is connected to five positive polarization signals and five negative polarization signals corresponding to a group of low-frequency dual-polarization vibrators; Each group of intermediate frequency dual-polarization oscillators is divided into four small groups of intermediate frequency dual-polarization oscillators, and each small group of intermediate frequency dual-polarization oscillators includes four intermediate frequency dual-polarization oscillators. The positive polarization signal and the negative polarization signal of each small group of intermediate frequency dual-polarization oscillators are respectively synthesized into one positive polarization signal and one negative polarization signal through an intermediate frequency one-to-four power splitter board. The four positive polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two positive polarization signals through a combiner and then connected to the first intermediate frequency phase shifter. The four negative polarization signals corresponding to each group of intermediate frequency dual-polarization oscillators are synthesized into two negative polarization signals through another combiner and then connected to the second intermediate frequency phase shifter; the first intermediate frequency phase shifter is connected to eight positive polarization signals, and the second intermediate frequency phase shifter is connected to eight negative polarization signals.

7. The multi-frequency base station antenna according to any one of claims 1 to 6, characterized in that: Also includes: A ruler; each ruler is connected to a portion of a corresponding transmission member that performs linear motion; each ruler passes through a first fixing member and is slidably connected to the first fixing member, and the first fixing member is connected to the reflective plate; the portion of each transmission member that performs linear motion passes through at least one second fixing member and is slidably connected to the second fixing member, and the second fixing member is also connected to the reflective plate.

8. The multi-frequency base station antenna according to any one of claims 1 to 6, characterized in that: The edge of the reflective plate is bent upward to form a wall; the low-frequency radiation unit and the intermediate-frequency radiation unit are located on the front of the reflective plate, and the low-frequency phase shifter, the intermediate-frequency phase shifter, the transmission member and the motor are located on the back of the reflective plate.

9. The multi-frequency base station antenna according to claim 8, characterized in that: Also includes: Radome, upper end cover and lower end cover; the radome is a hollow structure with openings at both ends, a placement chamber is provided therein, the reflector is located in the placement chamber, the upper end cover and the lower end cover are respectively provided at both ends of the radome; the reflector is bent upward at one end corresponding to the lower end cover to form a joint surface, each joint is provided on the joint surface, and through holes with the same number as the joints are provided at positions corresponding to the joints on the lower end cover, and each joint is detachably connected to the joint surface through its corresponding through hole.

10. The multi-frequency base station antenna according to claim 9, characterized in that: A plurality of supporting members are provided on the back of the reflector, and the plurality of supporting members are detachably connected to the inner surface of the back of the radome; The outer surface of the back side of the antenna cover is also provided with a plurality of mounting plates, which are detachably connected to the outer surface of the back side of the antenna cover, and each mounting plate corresponds to the position of a group of support members, and each group of support members includes at least one support member; and / or, the outer surface of the back side of the antenna cover is also provided with a reinforcement connecting plate, which is detachably connected to the outer surface of the back side of the antenna cover, and the reinforcement connecting plate corresponds to the position of a group of support members, and each group of support members includes at least one support member.

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