Anti-interference antenna

Abstract

The invention discloses an anti-interference antenna, and relates to the technical field of antennas. According to the invention, a multi-innovative temperature management and signal processing structure is provided, the low-noise amplifier and the band-pass filter are arranged in the antenna shell, and the signal stability is ensured by independently receiving four paths of BDS-B3 signals and one path of BDS-B1C signals; the temperature management system maintains normal operation of equipment through circulating cooling of a heat absorption shell plate and an evaporation pond by utilizing the evaporation and condensation principle, a rotary antenna tube can be heated and deiced under the low-temperature condition, and accumulated water is removed through centrifugal force; the whole system has the functions of efficient heat dissipation, reliable signal processing and anti-interference, the problems that in the prior art, the working temperature of an antenna is too high, and signals are interfered in the low-temperature environment are solved, the reliability of equipment is improved, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and in particular to an anti-interference antenna. Background Art

[0002] After a traditional antenna system has been working for a long time, the internal electronic components will generate a lot of heat. If this heat cannot be dissipated in a timely and effective manner, it will cause the components to overheat, thus affecting the normal operation of the antenna and may even cause equipment failure. The usual heat dissipation methods rely on simple heat sinks or fans, which are often insufficient to meet the heat dissipation requirements of high-power anti-interference antennas.

[0003] In severe cold weather, the antenna tube is prone to ice formation on its surface. The formation of ice not only increases signal attenuation, but may also damage the mechanical structure of the antenna. Most of the existing antifreeze measures are through external heating or physical protection, which cannot achieve efficient automatic antifreeze function, affecting the reliability and service life of the antenna under extreme climate conditions. Summary of the invention

[0004] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: an anti-interference antenna, comprising an antenna housing, a plurality of low-noise amplifiers are arranged in the antenna housing, each amplifier cooperates with a corresponding receiving channel to reduce the influence of noise; a plurality of band-pass filters are also arranged in the antenna housing to remove unnecessary frequency band signals; a heat-absorbing shell plate is sleeved on the outer side of the antenna housing, an evaporation pool is arranged below the heat-absorbing shell plate, an evaporation circulation nozzle is arranged on the evaporation pool, the evaporation circulation nozzle is connected to the inside of the evaporation pool, and the evaporation circulation nozzle is connected to the inside of the heat-absorbing shell plate through a heat dissipation hose. A water pump is also arranged in series on the heat dissipation hose, and a circulating water channel is arranged inside the heat-absorbing shell plate.

[0005] Preferably, a cooling outer cylinder is fixedly connected and sealed on the evaporation pool, and a plurality of heat dissipation cavities are fixed in a circular array and equidistantly on the inner circumferential surface of the cooling outer cylinder. Each heat dissipation cavity is hollow inside, and all heat dissipation cavities are connected to the interior of the cooling outer cylinder.

[0006] Preferably, the bottom edges of all heat dissipation cavities are provided with sliding slopes for sliding the liquid condensed from the heat dissipation cavities into the evaporation pool, and a negative pressure setting is adopted between the evaporation pool, the cooling outer cylinder and the heat dissipation cavities.

[0007] Preferably, a drainage cone plate is provided at the center of the circle surrounded by all the heat dissipation cavities, and the drainage cone plate is fixedly matched with the top of the heat dissipation cavities. An air collecting hood is provided at a coaxial position directly above all the heat dissipation cavities, and the air collecting hood is fixed to the cooling outer cylinder and / or the supporting frame through an air collecting hood bracket, wherein the air collecting hood is also provided with a drainage pipe.

[0008] Preferably, an air intake fan is provided at a coaxial position in the middle of the evaporation pool, and the air intake fan is rotatably mounted on an air intake fan bracket, and the air intake fan bracket is fixed on the evaporation pool.

[0009] Preferably, a thermal insulation frame is fixedly installed on the lower surface of the support frame, a gas heating channel is fixedly installed on the thermal insulation frame, a heater is fixedly installed on the gas heating channel, the heater is used to heat the gas heating channel, the thermal insulation frame is used to prevent the heat on the gas heating channel from being transferred to the support frame, and there is a gap between the gas heating channel and the circumferential surface of the cooling outer cylinder to prevent the heat from the gas heating channel from being transferred to the cooling outer cylinder.

[0010] Preferably, the antenna housing is elastically mounted on the support frame via at least four shock absorbing components.

[0011] Preferably, it also includes an antenna bracket, on which a rotating tube shaft is rotatably mounted, and two antenna tubes symmetrically about the axis of the rotating tube shaft are fixed at the top of the rotating tube shaft, and each antenna tube is provided with a bent nozzle tube at one end away from the rotating tube shaft, and the two bent nozzle tubes are symmetrically arranged about the axis of the rotating tube shaft; the bent nozzle tube, the antenna tube and the rotating tube shaft are connected, and the hot flow air pipe and the rotating tube shaft are rotationally sealed.

[0012] Preferably, the heater is provided with symmetrically arranged heating exhaust pipe openings and heating air inlet pipe openings, wherein the heating air inlet pipe openings are connected to the drainage pipe via an air pump, and wherein the heating exhaust pipe openings are connected to the rotating tube axis via a hot flow air pipe.

[0013] Preferably, the support frame is fixed to the mounting frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention realizes efficient heat conduction and heat dissipation management by providing thermal grease between the antenna housing and the heat-absorbing shell plate and utilizing a coolant circulation system in the heat-absorbing shell plate. The coolant circulates between the heat-absorbing shell plate and the evaporation pool through the heat dissipation hose and evaporates in the evaporation pool due to the low-pressure environment, thereby quickly taking away the heat in the antenna housing and condensing it for recovery. This circulating cooling mechanism effectively reduces the temperature inside the antenna housing, avoids the risk of performance being affected by overheating, and ensures the stable operation of the antenna; (2) The present invention introduces a low-noise amplifier in the antenna receiving channel and designs independent receiving channels to process BDS-B3 and BDS-B1C signals respectively. The application of the low-noise amplifier effectively reduces the influence of noise in the early stage of signal reception, and at the same time dynamically adjusts the amplifier gain in combination with the AGC mechanism to ensure that the signal will not be overloaded or distorted. Through the combination of dual mixer structure and bandpass filter, the stability and accuracy of signal processing are further ensured, and the signal reception quality of the antenna is greatly improved; (3) The present invention adopts adaptive filtering and beamforming technology for BDS-B3 signals to effectively suppress broadband interference signals. Adaptive filtering can dynamically adjust the characteristics of the filter and optimize the processing for different interference situations. Beamforming minimizes the interference signal through the spatial filter, thereby greatly improving the anti-interference ability of the antenna in a strong interference environment. Combined with a high-stability crystal oscillator or atomic clock as a clock source, the high accuracy of the timing function is further guaranteed, so that the antenna can still maintain high-precision positioning and timing functions in a complex environment; (4) The present invention uses at least four shock-absorbing components to elastically mount the antenna housing on the support frame, which effectively absorbs mechanical vibrations from the outside and ensures the stability of the precision components inside the antenna. At the same time, the sealing design of the heat-absorbing shell plate and the cooling system ensures that the circulation of the coolant is not interfered by the external environment, thereby further enhancing the reliability of the equipment. These structural design improvements not only extend the service life of the antenna, but also improve its working stability in complex environments; (5) The present invention uses a hot air pipe heating system to perform secondary heating using the hot air discharged from the heat dissipation cavity, and transports the hot air to the inside of the antenna tube by rotating the tube shaft. The heating system can effectively remove the frozen layer on the surface of the antenna tube, and at the same time use the centrifugal force generated by the rotation to throw away the melted water and ice. This function not only ensures the normal signal reception of the antenna, but also improves the adaptability and reliability of the antenna in extreme environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the shock absorbing assembly of the present invention.

[0017] Figure 3It is a schematic diagram of the structure of the gas heating channel of the present invention.

[0018] Figure 4 It is a schematic diagram of the structure of the evaporation pond of the present invention.

[0019] Figure 5 It is a schematic diagram of the structure of the drainage cone plate of the present invention.

[0020] In the figure: 101-cooling outer cylinder; 102-heat dissipation cavity plate; 103-sliding slope; 104-drainage cone plate; 105-air collecting hood; 106-drainage pipe; 107-evaporation pool; 108-intake fan bracket; 109-intake fan; 110-evaporation circulation pipe mouth; 111-heat dissipation hose; 112-water pump; 113-heat absorption shell plate; 114-air collecting hood bracket; 115-support frame; 116-heater; 117-gas heating channel; 118-insulation frame; 119-air pump; 120-heating inlet pipe mouth; 121-heating exhaust pipe mouth; 122-shock absorption assembly; 123-mounting frame; 124-hot flow air pipe; 125-antenna bracket; 126-antenna pipe; 127-bend nozzle pipe; 128-antenna shell; 129-rotating tube axis. DETAILED DESCRIPTION

[0021] Combine the following Figure 1-Figure 5 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0022] The present invention provides an anti-interference antenna, comprising an antenna housing 128, wherein a plurality of low-noise amplifiers are arranged in the antenna housing 128, each amplifier cooperates with a corresponding receiving channel to reduce the influence of noise; a plurality of band-pass filters are also arranged in the antenna housing 128 to remove unnecessary frequency band signals; a heat-absorbing shell plate 113 is sleeved on the outer side of the antenna housing 128, an evaporation pool 107 is arranged below the heat-absorbing shell plate 113, an evaporation circulation nozzle 110 is arranged on the evaporation pool 107, the evaporation circulation nozzle 110 is arranged in communication with the inside of the evaporation pool 107, and the evaporation circulation nozzle 110 is arranged in circulation communication with the inside of the heat-absorbing shell plate 113 through a heat-dissipating hose 111. A water pump 112 is also arranged in series on the heat-dissipating hose 111, and a circulating water channel is arranged inside the heat-absorbing shell plate 113. The cooling outer cylinder 101 is fixedly connected and sealed on the evaporation pool 107. A plurality of heat dissipation cavities 102 are fixed in a circular array and equidistantly on the inner circumferential surface of the cooling outer cylinder 101. The interior of each heat dissipation cavity 102 is hollow, and all heat dissipation cavities 102 are connected to the interior of the cooling outer cylinder 101. The bottom edges of all heat dissipation cavities 102 are provided with a sliding slope 103, which is used to slide the liquid condensed from the heat dissipation cavity 102 into the evaporation pool 107, and a negative pressure is set between the evaporation pool 107, the cooling outer cylinder 101 and the heat dissipation cavity 102.

[0023] A drainage cone plate 104 is provided at the center of the circle around all the heat dissipation cavities 102, and the drainage cone plate 104 is fixedly matched with the top of the heat dissipation cavities 102. A gas collecting hood 105 is provided at a coaxial position directly above all the heat dissipation cavities 102, and the gas collecting hood 105 is fixed to the cooling outer cylinder 101 and / or the supporting frame 115 through a gas collecting hood bracket 114, wherein the gas collecting hood 105 is also provided with a drainage pipe 106. An air intake fan 109 is provided at a coaxial position in the middle of the evaporation pool 107, and the air intake fan 109 is rotatably mounted on an air intake fan bracket 108, and the air intake fan bracket 108 is fixed to the evaporation pool 107. The lower surface of the support frame 115 is fixedly mounted with a heat insulating frame 118, on which a gas heating channel 117 is fixedly mounted, on which a heater 116 is fixedly mounted, and the heater 116 is used to heat the gas heating channel 117. The heat insulating frame 118 is used to prevent the heat on the gas heating channel 117 from being transferred to the support frame 115, and there is a gap between the gas heating channel 117 and the circumferential surface of the cooling outer cylinder 101, so as to prevent the heat of the gas heating channel 117 from being transferred to the cooling outer cylinder 101. The antenna housing 128 is elastically mounted on the support frame 115 through at least four shock absorbing components 122.

[0024] The antenna bracket 125 is also included. A rotating tube shaft 129 is rotatably mounted on the antenna bracket 125. Two antenna tubes 126 are fixed to the top of the rotating tube shaft 129, which are symmetrical about the axis of the rotating tube shaft 129. Each antenna tube 126 is equipped with a bent nozzle tube 127 at one end away from the rotating tube shaft 129. The two bent nozzle tubes 127 are symmetrically arranged about the axis of the rotating tube shaft 129. The bent nozzle tube 127, the antenna tube 126 and the rotating tube shaft 129 are connected, and the hot air flow pipe 124 is rotatably sealed with the rotating tube shaft 129. The heater 116 is equipped with a symmetrically arranged heating exhaust pipe port 121 and a heating air inlet pipe port 120, wherein the heating air inlet pipe port 120 is connected to the drainage pipe 106 through an air pump 119, and the heating exhaust pipe port 121 is connected to the rotating tube shaft 129 through a hot air flow pipe 124. The support frame 115 is fixed on the mounting frame 123.

[0025] The working principle of an anti-interference antenna disclosed in the present invention is as follows: all components inside the antenna housing 128 are fitted with the inner wall of the antenna housing 128, and thermal conductive silicone grease is arranged between the fitting surfaces; thermal conductive silicone grease is arranged between the antenna housing 128 and the heat absorbing shell plate 113; multiple channels are arranged inside the antenna housing 128, and four BDS-B3 signals and one BDS-B1C signal are independently received. Each receiving channel is equipped with a low-noise amplifier to ensure that weak signals can be effectively amplified in the early stage of reception and reduce the influence of noise. An AGC mechanism is introduced during the signal amplification process to dynamically adjust the gain of the amplifier according to the received signal strength to avoid signal overload or distortion. A dual mixer structure is adopted to first down-convert the received B3 frequency point signal from the original frequency to the intermediate frequency (IF), and then further down-convert it to a lower frequency band for subsequent processing. For the B1C signal, only one down-conversion process is required. A phase-locked loop (PLL) is used to generate a stable local oscillator signal to ensure the accuracy and stability of frequency conversion during the down-conversion process. An accurate bandpass filter is designed for each signal, and the B3 frequency point and the specific frequency range of the B1C signal are filtered to remove unnecessary frequency band signals. For the B3 frequency point, adaptive filtering and beamforming are used to suppress broadband interference signals. At the same time, a highly stable crystal oscillator or atomic clock is used as the system clock source to ensure the high accuracy of the timing function.

[0026] As time goes by, the above-mentioned work will generate a lot of heat, which will seriously affect the normal operation of the equipment. Therefore, it is necessary to manage the temperature of the equipment, start the air intake fan 109 and the water pump 112, wherein the water pump 112 will drive the coolant inside the evaporation pool 107 and the heat absorption shell plate 113 to circulate, wherein the coolant inside the evaporation pool 107 does not fill the entire space of the evaporation pool 107, but like the water in the pool, only occupies two-thirds of the volume of the evaporation pool 107, wherein the coolant inside the heat absorption shell plate 113 will absorb the heat on the antenna housing 128, that is, the heat inside the antenna housing 128, and then pass through the heat dissipation hose 1 11 The cooling liquid that absorbs heat is transferred to the evaporation pool 107. Since the pressure inside the evaporation pool 107 is lower than the external atmospheric pressure, the high-temperature cooling liquid will evaporate and gasify (a liquid with a lower boiling point is selected, such as electronic fluoride liquid). The gasified cooling liquid will move to the cooling outer cylinder 101 and the heat dissipation cavity 102. At this time, the rotating air intake fan 109 will send the external cold air into the heat dissipation cavity 102, thereby reducing the temperature of the heat dissipation cavity 102, so that the temperature of the heat dissipation cavity 102 is lower than the boiling point of the cooling liquid. At this time, the gaseous cooling liquid will condense into liquid on the heat dissipation cavity 102, and part of it will also condense on the cooling outer cylinder 101. The condensed liquid cooling liquid will slide into the evaporation pool 107 through the sliding slope 103, and then recirculate into the heat absorption shell plate 113 to continue to absorb the heat of the antenna housing 128.

[0027] When the air intake fan 109 is dissipating heat to the heat dissipation cavity 102, the air that has been heated on the surface of the heat dissipation cavity 102 will be discharged upward to the air collecting hood 105. A gap is provided between the air collecting hood 105 and the cooling outer tube 101, so some gas will be discharged through the gap between the air collecting hood 105 and the cooling outer tube 101. The guide cone plate 104 provided therein can guide the airflow driven by the air intake fan 109 to flow toward the heat dissipation cavity 102, and then flow toward the air collecting hood 105 through the heat dissipation cavity 102, so that the flow of cold air can be effectively guided. At the same time, a gap is provided between the rotating outer ring of the air intake fan 109 and the inner wall of the central cylinder of the evaporation pool 107. When the air intake fan 109 drives the air to flow, the pressure in the air flow direction (that is, the flowing air inside the evaporation pool 107) is relatively low. Therefore, under the action of atmospheric pressure, external air will flow in through the gap, so that the air intake fan 109 can drive more air flow, thereby increasing the flow rate of cold air and increasing the heat dissipation effect on the heat dissipation cavity 102.

[0028] If an external antenna tube 126 is used, the surface of the antenna tube 126 may freeze in severe cold weather, and the freezing may easily interfere with its signal. Therefore, the antenna tube 126 needs to be heated to remove ice and water on the surface. At this time, the air pump 119 is started, and the air pump 119 inhales the hot air in the air collecting cover 105 through the drainage pipe 106 (the hot air is discharged from the heat dissipation cavity 102), and then sends it into the gas heating channel 117 through the heated air inlet pipe port 120, and then sends it into the hot flow air pipe 124 through the heated exhaust pipe port 121, and then enters the rotating tube shaft 129, and is diverted to the antenna tube 126 through the rotating tube shaft 129, so that the antenna tube 126 is heated. At the same time If the heating effect needs to be improved, the heater 116 is started, and the heater 116 heats the gas heating channel 117, so that the air passing through the gas heating channel 117 is heated again, thereby increasing the temperature of the gas entering the antenna tube 126. At the same time, the bent nozzle 127 (the opening of the bent nozzle 127 is arranged perpendicular to the axis of the antenna tube 126) will spray outward, and the sprayed gas will exert force on the antenna tube 126 in the reverse direction, thereby pushing the antenna tube 126 to rotate. The rotation of the antenna tube 126 will generate centrifugal force, thereby throwing off the melted water and ice on the surface of the antenna tube 126, and at the same time, it can also make the surface of the antenna tube 126 move relative to the air, thereby increasing the elimination speed of water and ice.

Claims

1. An anti-interference antenna, characterized in that: The antenna housing (128) comprises a plurality of low-noise amplifiers arranged in the antenna housing (128), each amplifier being coordinated with a corresponding receiving channel to reduce the influence of noise; the antenna housing (128) is also provided with a plurality of band-pass filters to remove unnecessary frequency band signals; A heat absorbing shell plate (113) is sleeved on the outer side of the antenna housing (128); an evaporation pool (107) is arranged below the heat absorbing shell plate (113); an evaporation circulation pipe port (110) is arranged on the evaporation pool (107); the evaporation circulation pipe port (110) is arranged in communication with the inside of the evaporation pool (107); the evaporation circulation pipe port (110) is arranged in circulation communication with the inside of the heat absorbing shell plate (113) via a heat dissipation hose (111); a water pump (112) is also arranged in series on the heat dissipation hose (111); and a circulating water channel is arranged inside the heat absorbing shell plate (113).

2. The anti-interference antenna according to claim 1, characterized in that: A cooling outer cylinder (101) is fixedly connected and sealed on the evaporation pool (107); a plurality of heat dissipation cavities (102) are fixed in a circular array and at equal intervals on the inner circumferential surface of the cooling outer cylinder (101); the interior of each heat dissipation cavity (102) is hollow; and all the heat dissipation cavity cavities (102) are connected to the interior of the cooling outer cylinder (101).

3. The anti-interference antenna according to claim 2, characterized in that: The bottom edges of all the heat dissipation fins (102) are provided with a sliding slope (103) for sliding the liquid condensed from the heat dissipation fins (102) into the evaporation pool (107), and a negative pressure is set between the evaporation pool (107), the cooling outer cylinder (101) and the heat dissipation fins (102).

4. The anti-interference antenna according to claim 3, characterized in that: A drainage cone plate (104) is provided at the center of a circle surrounded by all the heat dissipation cavities (102), the drainage cone plate (104) is fixedly matched with the top of the heat dissipation cavities (102), and an air collecting hood (105) is provided at a coaxial position directly above all the heat dissipation cavities (102), the air collecting hood (105) is fixed to the cooling outer cylinder (101) and / or the supporting frame (115) via an air collecting hood bracket (114), wherein the air collecting hood (105) is also provided with a drainage pipe (106).

5. The anti-interference antenna according to claim 4, characterized in that: An air intake fan (109) is arranged at a coaxial position in the middle of the evaporation pool (107). The air intake fan (109) is rotatably mounted on an air intake fan bracket (108), and the air intake fan bracket (108) is fixed on the evaporation pool (107).

6. The anti-interference antenna according to claim 5, characterized in that: A heat insulating frame (118) is fixedly mounted on the lower surface of the support frame (115), a gas heating channel (117) is fixedly mounted on the heat insulating frame (118), a heater (116) is fixedly mounted on the gas heating channel (117), the heater (116) is used to heat the gas heating channel (117), the heat insulating frame (118) is used to prevent heat on the gas heating channel (117) from being transferred to the support frame (115), and a gap is present between the gas heating channel (117) and the circumferential surface of the cooling outer tube (101), thereby preventing heat from the gas heating channel (117) from being transferred to the cooling outer tube (101).

7. The anti-interference antenna according to claim 6, characterized in that: The antenna housing (128) is elastically mounted on the support frame (115) via at least four shock absorbing components (122).

8. The anti-interference antenna according to claim 7, characterized in that: It also includes an antenna bracket (125), on which a rotating tube shaft (129) is rotatably mounted, and two antenna tubes (126) are fixed at the top end of the rotating tube shaft (129) and are symmetrical about the axis of the rotating tube shaft (129), and each antenna tube (126) is provided with a bent nozzle tube (127) at one end away from the rotating tube shaft (129), and the two bent nozzle tubes (127) are symmetrically arranged about the axis of the rotating tube shaft (129); The bent nozzle tube (127), the antenna tube (126) and the rotating tube shaft (129) are connected to each other, and the hot flow air pipe (124) and the rotating tube shaft (129) are rotationally sealed.

9. The anti-interference antenna according to claim 8, characterized in that: The heater (116) is provided with a symmetrically arranged heating exhaust pipe opening (121) and a heating air inlet pipe opening (120), wherein the heating air inlet pipe opening (120) is connected to the drainage pipe (106) via an air pump (119), and the heating exhaust pipe opening (121) is connected to the rotating pipe shaft (129) via a hot flow air pipe (124).

10. The anti-interference antenna according to claim 9, characterized in that: The support frame (115) is fixed on the mounting frame (123).

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