A broadband dual-polarized low standing wave base station antenna

Abstract

The present application relates to a kind of broadband dual-polarized low standing wave base station antennas, including antenna body and support, its features are: the backplane of shell is heat-conducting material, hollow cooling plate is installed on the back of backplane, cooling plate is in contact with backplane, the base station antenna also includes liquid cooling radiator, two-way liquid pump and controller, first temperature sensor and second temperature sensor are installed on the upper end and lower end of the back of backplane respectively, third temperature sensor is installed in the central part of backplane.The base station antenna needs to be cooled when radiating, the temperature value size of the upper end and lower end of backplane is used to determine the delivery direction of cooling liquid when starting to radiate, cooling liquid will flow to the end of backplane with higher temperature when starting to radiate, and the radiating is more reasonable;And the delivery direction of cooling liquid will be reversed once in a control cycle T, so that the radiating effect is better, and the base station antenna can better adapt to high-temperature hot region.

Description

Technical Field

[0001] The present invention relates to a dual-polarization base station antenna, in particular to a broadband dual-polarization low standing wave base station antenna. Background Art

[0002] Base station antennas are a crucial component of mobile communication systems, and dual-polarized antennas are a novel antenna technology. Dual-polarized antennas combine two orthogonal polarizations (+45° and -45°) operating simultaneously in transmit and receive duplex mode. Their most significant advantage is that they reduce the number of antennas required for a single directional base station. Dual-polarized antennas offer the advantages of wideband bandwidth and low standing wave (VSWR). Similar to electrically tunable antennas, their use in mobile communication networks can reduce call loss, mitigate interference, and improve overall network quality of service.

[0003] Because base station antennas are typically deployed outdoors, existing base station antennas lack active heat dissipation and cooling capabilities. In hot climates, when the entire base station antenna is exposed to sunlight and continuously operating, the heat generated can reach surface temperatures as high as 60°C to 90°C. This high temperature adversely affects the antenna's performance and hinders its service life, requiring further improvement. Summary of the Invention

[0004] Based on the above description, the present invention provides a broadband dual-polarization low standing wave base station antenna, which has the function of active heat dissipation and temperature reduction, and can better adapt to high temperature and hot areas.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A broadband dual-polarization low standing wave base station antenna, comprising an antenna body and a support, wherein a plurality of antenna poles are mounted inside the shell of the antenna body, wherein the roots of the antenna poles are connected and fixed to the back plate of the shell, and the antenna poles are arranged in an array; an upper connecting buckle and a lower connecting buckle are respectively mounted and fixed at the upper and lower ends of the support, wherein the upper connecting buckle is connected and fixed to the upper end of the shell, and the lower connecting buckle is connected and fixed to the lower end of the shell, wherein the back plate of the shell is made of a heat-conducting material, and a hollow cooling plate is mounted on the back of the back plate, wherein the cooling plate is in contact with the back plate, and the base station antenna further comprises a liquid cooling radiator, a bidirectional liquid pump and a controller, wherein the liquid cooling radiator The first port of the liquid-cooled radiator is connected to the connection port at the upper end of the cooling plate through a first conduit, the second port of the liquid-cooled radiator is connected to the first port of the two-way liquid pump through a second conduit, and the second port of the two-way liquid pump is connected to the connection port at the lower end of the cooling plate through a third conduit; a first temperature sensor and a second temperature sensor are respectively installed at the upper end and the lower end of the back of the back plate, and a third temperature sensor is installed at the center of the back plate; the first temperature sensor, the second temperature sensor and the third temperature sensor are all connected to a controller, and the liquid-cooled radiator and the two-way liquid pump are connected to and controlled by the controller.

[0007] As a preferred solution, the first temperature sensor, the second temperature sensor and the third temperature sensor respectively detect the temperature values ​​of the upper, lower and middle parts of the back plate, that is, the first temperature value t1, the second temperature value t2 and the third temperature value t3. The detected temperature values ​​are fed back to the controller, and the controller calculates the difference Δt between t1 and t2, Δt=t1-t2; the controller calculates the difference Δtu between t1 and t3, Δtu=t1-t3; the controller calculates the difference Δtd between t2 and t3, Δtd= t2-t3; the controller calculates the ratio α of the absolute value of Δtu to the absolute value of Δtd; when the temperature value detected by any temperature sensor exceeds the preset value, the controller controls the bidirectional liquid pump to start; after the bidirectional liquid pump is started, the controller controls the liquid pump in a periodic control manner; if Δt>0, then in each control period T the controller first controls the bidirectional liquid pump to deliver in the forward direction, and then controls the bidirectional liquid pump to deliver in the reverse direction, and the ratio of the duration of the forward delivery to the reverse delivery is α; if Δt<0, then in each control period T the controller first controls the bidirectional liquid pump to deliver in the reverse direction, and then controls the bidirectional liquid pump to deliver in the forward direction, and the ratio of the duration of the reverse delivery to the forward delivery of the bidirectional liquid pump is α.

[0008] As a preferred solution: a flow regulating valve is installed on the second conduit, and the flow regulating valve is connected to and controlled by the controller. When heat dissipation is started, the controller divides the length of the backplate into a high-temperature section and a low-temperature section, so that the ratio of the length of the high-temperature section to the length of the low-temperature section is α. The controller obtains the number of rows M of antenna poles in the high-temperature section and the number of rows N of antenna poles in the low-temperature section, and calculates the ratio β of N to M, β=M / N. During the process of transporting the coolant, the controller controls the flow regulating valve so that the ratio of the coolant flow initially flowing to the high-temperature section to the coolant flow flowing to the low-temperature section after reversal is equal to β.

[0009] As a preferred solution: the controller includes a main control module, and also includes a liquid pump drive module, a fan drive module, a storage module, a communication module and a power supply module connected to the main control module. The communication module is used for communication between the main control module and external equipment or a cloud platform. The power supply module is used to supply power to the controller and the sensor. The drive signal output end of the liquid pump drive module is connected to the bidirectional liquid pump, and the drive signal output end of the fan drive module is connected to the cooling fan of the liquid cooling radiator.

[0010] As a preferred solution: the controller also includes a current acquisition module for collecting the current size of the antenna pole, the acquisition end of the current acquisition module is connected to the power supply end of the antenna pole, and the output end of the current acquisition module is connected to the sampling signal input end of the main control module.

[0011] As a preferred solution: the controller also includes a voltage acquisition module for acquiring the voltage of the antenna pole, the acquisition end of the voltage acquisition module is connected to the power supply end of the antenna pole, and the output end of the voltage acquisition module is connected to the sampling signal input end of the main control module.

[0012] As a preferred solution: the communication module is a WIFI module or an Internet of Things card communication module.

[0013] As a preferred solution: a plurality of thermal pads are arranged at intervals on the contact surface of the cooling plate and the back plate.

[0014] As a preferred solution: a plurality of guide strips are arranged in parallel along the length direction of the cooling plate at the upper end connection port and the lower end connection port of the cooling plate.

[0015] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects: when the base station antenna needs to dissipate heat and cool down, the direction of coolant delivery when starting heat dissipation is determined by the temperature values ​​at the upper and lower ends of the backplate. When heat dissipation is started, the coolant will first flow to the end of the backplate with higher temperature, and the heat dissipation is more reasonable; and the delivery direction of the coolant will change once within a control cycle T. The ratio of the time for forward coolant delivery to the time for reverse coolant delivery is determined according to the ratio of the temperature difference between the upper and middle parts of the cooling plate to the temperature difference between the lower and middle parts. This can be used as a certain reference to make the duration of forward delivery and reverse delivery adapt to the heat distribution of the backplate, so that the heat dissipation effect is better, and the base station antenna can better adapt to high temperature and hot areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the overall structure of the base station antenna in this embodiment;

[0017] Figure 2 This is a control principle block diagram in this embodiment;

[0018] Figure 3 Schematic diagram of the internal structure of the base station antenna in this embodiment;

[0019] Figure 4 Schematic diagram of the structure of the thermal pad in this embodiment;

[0020] Figure 5 Schematic diagram of the internal structure of the cooling plate in this embodiment.

[0021] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0022] 1. Pillar; 2. Shell; 3. Upper connecting buckle; 4. Lower connecting buckle; 5. Folding connecting rod; 6. Cooling plate; 7. Liquid cooling radiator; 8. Bidirectional liquid pump; 9. First conduit; 10. Second conduit; 11. Third conduit; 12. First temperature sensor; 13. Second temperature sensor; 14. Third temperature sensor; 15. Flow regulating valve; 16. Thermal pad; 17. First connecting port; 18. Second connecting port; 19. Guide strip; 20. Back plate; 21. Antenna pole. DETAILED DESCRIPTION

[0023] Reference Figure 1 and Figure 3 A broadband dual-polarization low standing wave base station antenna includes an antenna body and a support 1. A plurality of antenna poles 21 are installed inside the shell 2 of the antenna body. The roots of the antenna poles 21 are connected and fixed to the back plate 20 of the shell 2, and the antenna poles 21 are arranged in an array; an upper connecting buckle 3 and a lower connecting buckle 4 are respectively installed and fixed at the upper and lower ends of the support 1. The upper connecting buckle 3 is connected and fixed to the upper end of the shell 2 through a folding connecting rod 5, and the lower connecting buckle 4 is connected and fixed to the lower end of the shell 2.

[0024] The back plate 20 of the housing 2 is made of a heat-conducting material. A cooling plate 6 is mounted on the back of the back plate 20 and contacts the back plate 20. The cooling plate 6 is a hollow structure, through which a coolant flows. The top and bottom ends of the cooling plate 6 are provided with connection ports (i.e., the first connection port 17 and the second connection port 18 in Figure 5 ).

[0025] The base station antenna also includes a liquid-cooled radiator 7, a bidirectional liquid pump 8, and a controller. The first port of the liquid-cooled radiator 7 is connected to the connection port at the top of the cooling plate 6 via a first conduit 9. The second port of the liquid-cooled radiator 7 is connected to the first port of the bidirectional liquid pump 8 via a second conduit 10. The second port of the bidirectional liquid pump 8 is connected to the connection port at the bottom of the cooling plate 6 via a third conduit 11.

[0026] When the bidirectional liquid pump 8 transports coolant in the forward direction, the flow direction of the coolant is: bidirectional liquid pump 8 - liquid-cooled radiator 7 - cooling plate 6 - bidirectional liquid pump 8; when the bidirectional liquid pump 8 transports coolant in the reverse direction, the flow direction of the coolant is: bidirectional liquid pump 8 - cooling plate 6 - liquid-cooled radiator 7 - bidirectional liquid pump 8.

[0027] A first temperature sensor 12 for detecting the temperature of the upper portion of the back plate 20 is installed at the upper end of the back surface of the back plate 20, a second temperature sensor 13 for detecting the temperature of the lower portion of the back plate 20 is installed at the lower end of the back surface of the back plate 20, and a third temperature sensor 14 for detecting the temperature of the middle portion of the back plate 20 is installed at the center of the front surface of the back plate 20 (as shown in FIG. Figure 3 shown).

[0028] Reference Figure 2The controller in this embodiment includes a main control module, as well as a liquid pump driver module, a fan driver module, a storage module, a communication module, and a power module connected to the main control module. The communication module is used for communication between the main control module and external devices or a cloud platform, and the power module is used to supply power to the controller and sensors. The drive signal output terminal of the liquid pump driver module is connected to the bidirectional liquid pump 8, the drive signal output terminal of the fan driver module is connected to the cooling fan of the liquid cooling radiator 7, and the output terminals of the first, second, and third temperature sensors 14 are connected to the sampling signal input terminal of the main control module.

[0029] During the operation of the base station antenna, the heat generated by the antenna pole 21 is conducted to the backplate 20, thereby increasing the temperature of the backplate 20. The first temperature sensor 12, the second temperature sensor 13, and the third temperature sensor 14 respectively detect the temperature values ​​of the upper, lower, and middle parts of the backplate 20, i.e., the first temperature value t1, the second temperature value t2, and the third temperature value t3. The detected temperature values ​​are fed back to the main control module, and the main control module calculates the difference Δt between t1 and t2, Δt=t1-t2; the main control module calculates the difference Δtu between t1 and t3, Δtu=t1-t3; the main control module calculates the difference Δtd between t2 and t3, Δtd=t2-t3; and the main control module calculates the ratio α of the absolute value of Δtu to the absolute value of Δtd.

[0030] During operation, when the temperature detected by any temperature sensor exceeds a preset value, the main control module sends a control instruction to the liquid pump driver module, which then activates the bidirectional liquid pump 8, causing it to begin delivering coolant. Simultaneously, the main control module sends a control instruction to the fan driver module, causing it to activate the cooling fan. After the liquid pumps are activated, the main control module controls the liquid pumps in a periodic manner. If Δt > 0, within each control period T, the main control module first controls the bidirectional liquid pump 8 to deliver coolant in the forward direction, then in the reverse direction, with the ratio of the forward and reverse delivery periods being α. If Δt < 0, within each control period T, the main control module first controls the bidirectional liquid pump 8 to deliver coolant in the reverse direction, then in the forward direction, with the ratio of the reverse and forward delivery periods being α. When the temperatures detected by all three temperature sensors fall below the preset values, the main control module stops the bidirectional liquid pump 8 and the cooling fan.

[0031] The above scheme, that is, the direction of the cooling liquid is determined by the temperature value of the upper and lower ends of the back plate 20, the cooling liquid will flow to the end of the back plate 20 with a higher temperature when starting to dissipate heat, and the heat dissipation is more reasonable; and the direction of the cooling liquid will be changed once in a control period T, and the ratio of the time of the forward direction of the cooling liquid and the time of the reverse direction of the cooling liquid is determined according to the ratio of the temperature difference between the upper end and the middle of the cooling plate 6 and the temperature difference between the lower end and the middle, so as to serve as a certain reference, so that the length of the forward direction and the reverse direction of the cooling liquid is adapted to the heat distribution of the back plate 20, so that the heat dissipation effect is better.

[0032] On this basis, referring to Figure 1 In the embodiment, a flow regulating valve 15 is further arranged on the second conduit 10, the flow regulating valve 15 is connected with the main control module, and the main control module can control the flow of the flow regulating valve 15, so as to realize the control of the flow of the cooling liquid.

[0033] The rows of antenna elements 21 on the back plate 20 are positioned in advance, and the position data of the rows of antenna elements 21 are stored in the storage module.

[0034] When starting to dissipate heat, the main control module divides the length of the back plate 20 into a high-temperature section and a low-temperature section according to the ratio α, that is, the ratio of the length of the high-temperature section to the length of the low-temperature section is α. As Figure 3 indicated, at this time, the upper end of the back plate 20 is the high-temperature end and the lower end is the low-temperature end, the length of the high-temperature section is L1, the length of the low-temperature section is L2, and L1 / L2=α. The number of rows M of the antenna elements 21 in the high-temperature section and the number of rows N of the antenna elements 21 in the low-temperature section are obtained, the ratio β of N and M is calculated, and β=M / N. In the process of transporting the cooling liquid, the main control module controls the flow regulating valve 15 so that the ratio of the flow of the cooling liquid flowing to the high-temperature section initially and the flow of the cooling liquid flowing to the low-temperature section after reversing is equal to β.

[0035] Through the above scheme, the flow of the forward and reverse directions of the cooling liquid can be adaptively adjusted according to the distribution of the antenna elements 21, so that the flow of the cooling liquid changes with the number of the antenna elements 21 in the high-temperature section and the low-temperature section, and the heat dissipation and cooling effect is better.

[0036] As Figure 2 indicated, the controller in the embodiment further includes a current acquisition module for acquiring the current of the antenna elements 21, the acquisition end of the current acquisition module is connected to the power supply end of the antenna elements 21, and the output end of the current acquisition module is connected with the sampling signal input end of the main control module.

[0037] As Figure 3As shown, the controller in this embodiment also includes a voltage acquisition module for acquiring the voltage of the antenna pole 21. The acquisition end of the voltage acquisition module is connected to the power supply end of the antenna pole 21, and the output end of the voltage acquisition module is connected to the sampling signal input end of the main control module.

[0038] During the operation of the base station antenna, the main control module transmits the collected current and voltage information to the external device through the communication module and then returns to the cloud platform, thereby monitoring the working status of the base station antenna.

[0039] The communication module in this embodiment is a WIFI module or an IoT card communication module.

[0040] Reference Figure 4 In this embodiment, a plurality of thermal pads 16 are arranged at intervals on the contact surface between the cooling plate 6 and the back plate 20. The thermal pads 16 have a high thermal conductivity coefficient and can efficiently conduct the heat on the back plate 20 to the cooling plate 6.

[0041] Reference Figure 5 In this embodiment, a plurality of guide strips 19 are provided in parallel along the length direction of the cooling plate 6 at the upper and lower connection ports of the cooling plate 6. The guide strips 19 can play a role in diverting the flow, so that the coolant can flow more evenly in the cooling plate 6.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A broadband dual-polarization low standing wave base station antenna, comprising an antenna body and a support, wherein a plurality of antenna poles are mounted within the housing of the antenna body, the roots of the antenna poles being fixedly connected to the back plate of the housing, and the antenna poles being arranged in an array; an upper connecting buckle and a lower connecting buckle are respectively fixedly mounted at the upper and lower ends of the support, the upper connecting buckle being fixedly connected to the upper end of the housing, and the lower connecting buckle being fixedly connected to the lower end of the housing, wherein: The back plate of the shell is made of heat-conducting material, and a hollow cooling plate is installed on the back of the back plate, and the cooling plate is in contact with the back plate. The base station antenna also includes a liquid-cooled radiator, a two-way liquid pump and a controller. The first port of the liquid-cooled radiator is connected to the connection port at the upper end of the cooling plate through a first conduit, the second port of the liquid-cooled radiator is connected to the first port of the two-way liquid pump through a second conduit, and the second port of the two-way liquid pump is connected to the connection port at the lower end of the cooling plate through a third conduit; a first temperature sensor and a second temperature sensor are respectively installed at the upper end and the lower end of the back of the back plate, and a temperature sensor is installed at the center of the back plate. There is a third temperature sensor; the first temperature sensor, the second temperature sensor and the third temperature sensor are all connected to the controller, the liquid cooling radiator and the bidirectional liquid pump are connected to the controller and are controlled by the controller; the first temperature sensor, the second temperature sensor and the third temperature sensor respectively detect the temperature values ​​of the upper part, the lower part and the middle part of the back plate, that is, the first temperature value t1, the second temperature value t2 and the third temperature value t3, the detected temperature values ​​are fed back to the controller, and the controller calculates the difference Δt between t1 and t2, Δt=t1-t2; the controller calculates the difference Δtu between t1 and t3, Δtu= t1-t3; the controller calculates the difference Δtd between t2 and t3, Δtd= t2-t3; the controller calculates the ratio α of the absolute value of Δtu to the absolute value of Δtd; when the temperature value detected by any temperature sensor exceeds the preset value, the controller controls the bidirectional liquid pump to start; after the bidirectional liquid pump is started, the controller controls the liquid pump in a periodic control manner; if Δt>0, then in each control cycle T, the controller first controls the bidirectional liquid pump to deliver in the forward direction, and then controls the bidirectional liquid pump to deliver in the reverse direction, and the ratio of the duration of the forward delivery to the reverse delivery is α; if Δt<0, then in each control cycle T, the controller first controls the bidirectional liquid pump to deliver in the reverse direction, and then controls the bidirectional liquid pump to deliver in the forward direction, and the ratio of the duration of the reverse delivery to the forward delivery of the bidirectional liquid pump is α.

2. The broadband dual-polarization low standing wave base station antenna according to claim 1, wherein: The second conduit is equipped with a flow regulating valve, which is connected to and controlled by a controller. When heat dissipation is started, the controller divides the length of the backplate into a high-temperature section and a low-temperature section, so that the ratio of the length of the high-temperature section to the length of the low-temperature section is α. The controller obtains the number of rows M of antenna poles in the high-temperature section and the number of rows N of antenna poles in the low-temperature section, and calculates the ratio β of N to M, β=M / N. During the process of transporting the coolant, the controller controls the flow regulating valve so that the ratio of the coolant flow initially flowing to the high-temperature section to the coolant flow flowing to the low-temperature section after the reversal is equal to β.

3. The broadband dual-polarization low standing wave base station antenna according to claim 1, wherein: The controller includes a main control module, and also includes a liquid pump drive module, a fan drive module, a storage module, a communication module and a power supply module connected to the main control module. The communication module is used for communication between the main control module and external equipment or a cloud platform. The power supply module is used to supply power to the controller and the sensor. The drive signal output end of the liquid pump drive module is connected to the bidirectional liquid pump, and the drive signal output end of the fan drive module is connected to the cooling fan of the liquid cooling radiator.

4. The broadband dual-polarization low standing wave base station antenna according to claim 3, characterized in that: The controller also includes a current acquisition module for collecting the current size of the antenna pole. The acquisition end of the current acquisition module is connected to the power supply end of the antenna pole, and the output end of the current acquisition module is connected to the sampling signal input end of the main control module.

5. The broadband dual-polarization low standing wave base station antenna according to claim 3, wherein: The controller also includes a voltage acquisition module for acquiring the voltage of the antenna pole. The acquisition end of the voltage acquisition module is connected to the power supply end of the antenna pole, and the output end of the voltage acquisition module is connected to the sampling signal input end of the main control module.

6. The broadband dual-polarization low standing wave base station antenna according to claim 3, characterized in that: The communication module is a WIFI module or an IoT card communication module.

7. The broadband dual-polarization low standing wave base station antenna according to claim 1, wherein: A plurality of heat conducting pads are arranged at intervals on the contact surface of the cooling plate and the back plate.

8. The broadband dual-polarization low standing wave base station antenna according to claim 1, wherein: A plurality of guide strips are arranged in parallel along the length direction of the cooling plate at the upper end connection port and the lower end connection port of the cooling plate.

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