CN117276846B - Shape memory alloy-based self-adaptive short wave antenna - Google Patents
Shape memory alloy-based self-adaptive short wave antenna Download PDFInfo
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- CN117276846B CN117276846B CN202311446865.6A CN202311446865A CN117276846B CN 117276846 B CN117276846 B CN 117276846B CN 202311446865 A CN202311446865 A CN 202311446865A CN 117276846 B CN117276846 B CN 117276846B
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims description 59
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 18
- 238000007747 plating Methods 0.000 claims description 18
- 229910052709 silver Inorganic materials 0.000 claims description 18
- 239000004332 silver Substances 0.000 claims description 18
- 239000000741 silica gel Substances 0.000 claims description 15
- 229910002027 silica gel Inorganic materials 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 9
- 230000003044 adaptive effect Effects 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/085—Flexible aerials; Whip aerials with a resilient base
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/02—Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/14—Supports; Mounting means for wire or other non-rigid radiating elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
Abstract
The invention discloses a self-adaptive short wave antenna based on shape memory alloy, which belongs to the technical field of short wave communication and comprises an antenna base and an antenna housing, wherein the antenna housing is arranged on the antenna base, an antenna radiator is arranged in the antenna housing, and a control module is arranged in the antenna base.
Description
Technical Field
The invention relates to the technical field of short-wave communication, in particular to a self-adaptive short-wave antenna based on a shape memory alloy.
Background
In recent years, short wave communication has been widely used and strategically important in the fields of military, navigation, aviation, etc. With the rapid development of communication technology, short-wave communication puts higher demands on antenna performance. Traditional shortwave antenna structure is single, can't realize automatic matching under different operating frequencies. In order to realize automatic matching under different working frequencies, the physical length of the short wave antenna needs to be adjusted so as to achieve resonance conditions, improve communication quality, or be equipped with an antenna tuner, adjust working parameters such as antenna impedance, and the like, thereby realizing automatic matching under different frequencies
The current method for realizing automatic tuning of the antenna mainly comprises the following steps: capacitive tuning methods, electric tuner microwave tuning antennas and mechanically driven tuning antennas.
The disadvantages of the several methods of auto-tuning described above are also apparent
The capacitive tuning method has the disadvantage of requiring a separate tuner and control circuit, and the overall system is susceptible to external factors.
The electric tuner can realize tuning in a wider frequency range, but the tuning speed is relatively slow and the structure is complex.
The method has smaller volume, rapid tuning and higher integration level, but consumes more power, is limited by high power and requires a more complex control circuit;
the method has wider tuning range, but has a complex structure and relatively slow tuning speed.
The existing short wave antenna mainly adopts an electric tuner and a mechanical adjustment mode to realize self-adaptive design, but the solutions have the following disadvantages:
1. the structure is complex: the existing short wave antenna needs to be provided with an electric tuner or other mechanical adjusting devices, so that the structure of the whole antenna system becomes complex, and the installation and maintenance are difficult.
2. The adjusting time is long: the electric and mechanical adjustment modes all need longer time to realize the adjustment of the antenna length, and the real-time performance of short-wave communication is delayed.
3. The external influence is large: existing tuners or mechanical adjusting devices are susceptible to external environments, such as weather changes, rain and snow weather, etc., thereby affecting the adjusting performance of the antenna and the overall communication quality.
Disclosure of Invention
The invention aims to provide a self-adaptive short wave antenna based on shape memory alloy, which can realize automatic matching under different working frequencies and solve the problems of long antenna length adjustment time, complex structure and susceptibility to external influence in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the self-adaptive short wave antenna based on the shape memory alloy comprises an antenna base and an antenna housing, wherein the antenna housing is arranged on the antenna base, an antenna radiator is arranged in the antenna housing, and a control module is arranged in the antenna base;
the antenna radiator comprises an NITI shape memory alloy, a thermocouple, a heating resistance wire, soft silica gel and a silver plating wave-proof sleeve, wherein the NITI shape memory alloy, the thermocouple and the heating resistance wire are all positioned in the soft silica gel, the soft silica gel is positioned in the silver plating wave-proof sleeve, and the NITI shape memory alloy, the thermocouple, the heating resistance wire, the soft silica gel and the silver plating wave-proof sleeve are all irregularly shaped and positioned in the antenna housing;
the control module comprises a heating temperature control unit and a control unit, wherein the heating temperature control unit is used for controlling the temperature inside the antenna radiator so that the antenna radiator deforms;
the control unit is used for applying different current control signals to the heating temperature control unit and controlling the heating temperature control unit to heat the antenna radiator.
Preferably, the silver plating wave-proof sleeve is electrically connected with the control unit, the NITI shape memory alloy, the thermocouple and the heating resistance wire are electrically connected with the heating temperature control unit, and a low-frequency connector is connected between the control unit and the heating temperature control unit.
Preferably, the outside of the control unit is provided with a radio frequency input port, the outside of the heating temperature control unit is provided with a power supply data port, the outside of the power supply data port is connected with a power supply device and a radio station through a wire, and the outside of the radio frequency input port is connected with the radio station through a wire.
Preferably, the control unit is composed of a standing wave detection unit, a phase detection unit, a microprocessor unit and a DDS signal source unit.
Preferably, the heating temperature control unit consists of a temperature control heating unit and a temperature detection unit.
Preferably, the radome is made of glass fiber reinforced plastic.
Preferably, the antenna base is made of aviation aluminum alloy.
Preferably, the silver plating wave-proof sleeve is formed by interweaving a plurality of silver plating copper wires, and has flexible bending elasticity.
Preferably, the NITI shape memory alloy, the thermocouple, the heating resistance wire, the soft silica gel and the silver plating wave-proof sleeve are in spiral or stage folding shapes.
Preferably, the bottom of the antenna base is connected with a fixed mounting seat through a screw.
Compared with the prior art, the invention has the beneficial effects that:
the invention has the following advantages:
1. the structure is simple: the invention omits an electric tuner and a mechanical adjusting device, realizes the adjustment of the length of the antenna through the self-adaptive characteristic of the shape memory alloy, and greatly simplifies the structure of the whole antenna system, wherein a heating temperature control unit and a control unit are arranged in an antenna base, so that the antenna can change the shape and the impedance characteristic of the antenna according to the actual use frequency, and the purposes of automatic tuning and self-adaptive matching are realized.
2. The adjusting time is short: the phase change characteristic of the shape memory alloy is utilized to realize the rapid adjustment of the antenna length and improve the real-time performance of short wave communication.
3. The reliability is high: the invention is based on shape memory alloy material, has stronger resistance to external environmental factors such as climate change, rain and snow weather and the like, and improves the reliability of the whole communication system.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of an antenna radiator according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of an antenna base according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a power supply device and a radio station according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the control unit and the heating temperature control unit according to the embodiment of the present invention;
FIG. 6 is an enlarged schematic view of the area A in FIG. 2 according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of another morphological structure of a thermocouple according to an embodiment of the present invention;
FIG. 8 is a schematic flow chart of a control unit and a heating temperature control unit according to an embodiment of the present invention;
FIG. 9 is a diagram of a measurement circuit and a sampling circuit in an embodiment of the present invention;
FIG. 10 is a diagram of a temperature measurement circuit and a diagram of a temperature control heating circuit according to an embodiment of the present invention.
In the figure: 100. an antenna base; 101. an antenna housing; 200. an antenna radiator; 201. NITI shape memory alloys; 202. a thermocouple; 203. heating the resistance wire; 204. soft silica gel; 205. silver plating wave-proof sleeve; 300. a heating temperature control unit; 301. a control unit; 302. a power data port; 303. a radio frequency input port; 304. a power supply device; 305. a radio station; 306. a low frequency connector; 400. and (5) a mounting seat.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The antenna base 100, the antenna cover 101 and the antenna radiator 200 are formed, wherein the heating temperature control unit 300 and the control unit 301 are arranged in the antenna base 100, so that the antenna can change the shape and the impedance characteristic according to the actual use frequency, and the effects of automatic tuning and self-adaptive matching are achieved.
Referring to fig. 1, the adaptive short wave antenna based on shape memory alloy comprises an antenna base 100 and an antenna housing 101, wherein the antenna housing 101 is mounted on the antenna base 100, an antenna radiator 200 is mounted in the antenna housing 101, and a control module is mounted in the antenna base 100.
Specifically, the radome 101 is made of glass fiber reinforced plastic with light weight, high strength and weather resistance, provides protection for the antenna, has strong resistance to external environmental factors such as climate change, rainy and snowy weather and the like, and improves the reliability of the whole communication system; the antenna radiator 200 is a composite material based on shape memory alloy, which is the key for realizing self-adaption of the antenna; the antenna base 100 is made of aviation aluminum alloy, has light weight, high strength and strong heat dissipation capacity, and is internally provided with a control module for fixing an antenna radiator, the antenna base 100 is arranged on a fixed mounting seat 400, and the fixed mounting seat 400 can be any supporting platform.
As shown in fig. 2 and 6, the antenna radiator 200 includes a NITI shape memory alloy 201, a thermocouple 202, a heating resistance wire 203, a soft silica gel 204 and a silver plating wave-proof sleeve 205, where the NITI shape memory alloy 201, the thermocouple 202 and the heating resistance wire 203 are all located inside the soft silica gel 204, the soft silica gel 204 is located inside the silver plating wave-proof sleeve 205, the NITI shape memory alloy 201, the thermocouple 202, the heating resistance wire 203, the soft silica gel 204 and the silver plating wave-proof sleeve 205 are all irregularly located inside the radome 101, and the silver plating wave-proof sleeve 205 is formed by interweaving a plurality of silver plating copper wires, and has flexible bending elasticity.
Specifically, the antenna radiator 200 is made of a composite material, the NiTi memory alloy with shape memory characteristics is combined with a traditional material to form an alloy material, the traditional material is a manufacturing material of the existing antenna, a special-shaped structure is formed through manufacturing, the special-shaped structure can be a telescopic spiral structure, the length of the telescopic spiral structure is about 5 meters, the pitch is about 120mm, the winding diameter is about 50mm, and the wire diameter is 10mm, and when receiving a control signal, the structure can generate shape length change through control, so that the resonant frequency of the antenna is adjusted.
As shown in fig. 7, the antenna radiator 200 may be formed in various combinations such as a stepwise folded shape and a spiral-and-straight line shape.
As shown in fig. 3 and 5, the control module comprises a heating temperature control unit 300 and a control unit 301, the silver-plated wave-proof sleeve 205 is electrically connected with the control unit 301, the NITI shape memory alloy 201, the thermocouple 202 and the heating resistance wire 203 are electrically connected with the heating temperature control unit 300, a low-frequency connector 306 is connected between the control unit 301 and the heating temperature control unit 300, a radio frequency input port 303 is arranged outside the control unit 301, a power supply data port 302 is arranged outside the heating temperature control unit 300, a power supply device 304 is connected with a radio station 305 outside the power supply data port 302 through a wire, and the radio frequency input port 303 is connected with the radio station 305 through a wire.
Specifically, the rf input port 303 is mainly connected to an rf output port of the radio station 305, and the power data port 302 is connected to the power device 304 and a data port of the radio station 305, respectively.
As shown in fig. 5, the radio frequency signal entering through the radio frequency input port 303 is transmitted through the silver plating wave preventing sleeve 205 in a signal radiation manner, the control unit 301 can adjust the working frequency according to the requirement, and by applying different current control signals to the heating temperature control unit 300, the shape memory alloy is deformed in a phase change manner, so that the rapid adjustment and self-adaptive matching of the antenna length are realized, the control unit 301 has the functions of monitoring and feedback, and can be provided with monitoring equipment to monitor the working state of the antenna, such as the telescopic length, the impedance and the like of the antenna, and the data are fed back to the control unit 301 in real time, so that other parameters such as the current of the heating equipment can be adjusted, and the parameters of the antenna can be better matched with the required working frequency.
Further, the control unit 301 comprises a standing wave detection unit, a phase detection unit, a microprocessor unit and a DDS signal source unit, and the heating temperature control unit 300 comprises a temperature control heating unit and a temperature detection unit.
As shown in fig. 8, the power supply device 304 provides a stable voltage to supply power to the whole circuit, the microprocessor unit receives input signals, namely a temperature detection signal and an antenna detection signal, and detects the resonant frequency of the antenna according to the signals of the antenna detection unit, and the microprocessor unit judges whether the state is in a state when the minimum standing wave ratio or the S11 reflection coefficient is minimum, when the state is in a state when the minimum standing wave ratio or the S11 reflection coefficient is minimum, the microcontroller keeps the shape memory alloy heating element in a heating state so as to keep the antenna at the resonant frequency, otherwise, the microcontroller calculates and sends proper voltage and current to the shape memory alloy heating element according to the temperature detection signal so as to realize specific heating temperature, change the shape of the shape memory alloy heating element and adjust the resonant frequency.
As shown in fig. 9, the standing wave detection unit and the phase detection unit mainly comprise a measurement circuit and a sampling circuit, the measurement circuit uses a reflective bridge as a directional coupler, an unknown impedance is used as one arm of the reflective bridge, a reflected voltage of the unknown impedance is converted from balance to unbalance through a T4 transformer, and the reflected voltage is output to the sampling.
Further, the sampling circuit carries out mixing filtering on the two paths of signals to obtain a group of direct current levels, the direct current levels are sent to the high-precision ADC to obtain accurate values, software of the microprocessor unit calculates accurate values of unknown impedance to be measured according to the group of direct current levels obtained through measurement, and standing wave, phase and reflection coefficients are obtained through the phase detector and the standing wave ratio detector.
Furthermore, in the DDS signal source unit, a signal source is used as an excitation signal and a test reference vector for antenna impedance test, two direct digital synthesis signal sources of two DDSs are used for generating two paths of test signals of 1 MHz-30 MHz, one path is used as a reference I/O signal of a system, the other path is used as an output signal for providing vector excitation for impedance test, and the vector excitation is loaded on the tested unknown impedance.
Furthermore, the microprocessor in the microprocessor unit adopts an ARM7 microprocessor to carry out numerical processing and antenna resonance frequency control.
The method comprises the steps of outputting large measured data flow in the standing wave detection and phase detection processes, carrying out a large amount of digital filtering and data processing, calculating the accurate measured antenna impedance standing wave and reflection coefficient, judging whether the working frequency is on the resonant frequency of the antenna or not by a microprocessor according to the measured antenna impedance data, controlling a temperature control heating unit by using an I/O relay to deform the shape memory alloy, namely increasing or reducing the helical pitch of the antenna, changing the resonant frequency of the antenna, enabling the working frequency to be the resonant frequency, and needing a large amount of general microprocessor functions such as judgment, process statement and the like in the process. Firstly, parameters such as impedance, phase, standing wave ratio and the like of an antenna are identified by a detection circuit, and are provided for a microprocessor tuning algorithm to automatically control heating voltage and current, so that the shape memory alloy is heated and deformed, and a control parameter result output by each calculation is automatically stored in a temperature control parameter storage so as to be conveniently and directly called next time, and the efficiency is improved.
As shown in fig. 10, the heating temperature control unit 300 mainly comprises a temperature measuring circuit and a temperature control heating circuit, wherein the temperature measuring circuit is an unbalanced bridge, and one arm of the bridge is a thermistor MF51 with high sensitivity and negative temperature coefficient. As the temperature of the shape memory alloy changes, the resistance of MF51 also changes, as does the potential between the two points on the corresponding bridge A, B. The temperature controlled heating circuit comprises a voltage comparator F007 and a power driver 3DG12. When the temperature is low, the corresponding resistance of MF51 is large, and the corresponding voltage at point B is higher than the voltage at point C, i.e., VBC >0. At this time, the operational amplifier F007 outputs a positive voltage to turn on the transistor 3DG12, the relay is turned on, the power supply is turned on to heat, and the temperature of the shape memory alloy increases. As the temperature increases, the resistance of MF51 decreases, the corresponding B-point potential decreases, when VBC <0 is decreased, F007 turns over, and negative voltage is output, so that 3DG12 is turned off, the relay is released, the power supply circuit of the heater is turned off, heating is stopped, and the temperature of the shape memory alloy stops increasing. When the temperature is reduced to VBC >0 again, the heating is repeated, the temperature is controlled to be on a set value, and different temperatures correspond to different deformation amounts of the shape memory alloy, so that different resonant frequencies are adjusted.
In sum, the short wave antenna of the shape memory alloy with the spiral structure has the advantages that the length is about 5 meters, the screw pitch is about 120mm, the winding diameter is about 50mm, the wire diameter is 10mm, the resonance point of 10 MHz-20 MHz can be adjusted in the deformation range of 50-200 mm and 30-100 mm, the gain at the resonance point is 0-2 dB higher than that of the common whip antenna, the structure is simpler, and the anti-interference capability is higher.
The above is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a self-adaptation shortwave antenna based on shape memory alloy, includes antenna base (100) and radome (101), radome (101) install in on antenna base (100), its characterized in that: an antenna radiator (200) is arranged in the antenna housing (101), and a control module is arranged in the antenna base (100);
the antenna radiator (200) comprises an NITI shape memory alloy (201), a thermocouple (202), a heating resistance wire (203), soft silica gel (204) and a silver plating wave-proof sleeve (205), wherein the NITI shape memory alloy (201), the thermocouple (202) and the heating resistance wire (203) are all positioned in the soft silica gel (204), the soft silica gel (204) is positioned in the silver plating wave-proof sleeve (205), and the NITI shape memory alloy (201), the thermocouple (202), the heating resistance wire (203), the soft silica gel (204) and the silver plating wave-proof sleeve (205) are all irregularly shaped and positioned in the antenna housing (101);
the control module comprises a heating temperature control unit (300) and a control unit (301), wherein the heating temperature control unit (300) is used for controlling the temperature inside the antenna radiator (200) so that the antenna radiator (200) deforms;
the control unit (301) is used for applying different current control signals to the heating temperature control unit (300) and controlling the heating temperature control unit (300) to heat the antenna radiator (200);
the silver-plated wave-proof sleeve (205) is electrically connected with the control unit (301), the NITI shape memory alloy (201), the thermocouple (202) and the heating resistance wire (203) are electrically connected with the heating temperature control unit (300), and a low-frequency connector (306) is connected between the control unit (301) and the heating temperature control unit (300);
the outside of control unit (301) is installed radio frequency input port (303), the outside of heating control by temperature change unit (300) is installed power data mouth (302), the outside of power data mouth (302) is connected with power equipment (304) and radio station (305) through the wire, the outside of radio frequency input port (303) is connected with radio station (305) through the wire.
2. A shape memory alloy based adaptive short wave antenna according to claim 1, characterized in that: the control unit (301) is composed of a standing wave detection unit, a phase detection unit, a microprocessor unit and a DDS signal source unit.
3. A shape memory alloy based adaptive short wave antenna according to claim 1, characterized in that: the heating temperature control unit (300) is composed of a temperature control heating unit and a temperature detection unit.
4. A shape memory alloy based adaptive short wave antenna according to claim 1, characterized in that: the antenna housing (101) is made of glass fiber reinforced plastic.
5. A shape memory alloy based adaptive short wave antenna according to claim 1, characterized in that: the antenna base (100) is made of aviation aluminum alloy.
6. A shape memory alloy based adaptive short wave antenna according to claim 1, characterized in that: the silver-plated wave-proof sleeve (205) is formed by interweaving a plurality of silver-plated copper wires and has flexible bending elasticity.
7. A shape memory alloy based adaptive short wave antenna according to claim 1, characterized in that: the NITI shape memory alloy (201), the thermocouple (202), the heating resistance wire (203), the soft silica gel (204) and the silver plating wave-proof sleeve (205) are spirally or stepwise folded.
8. A shape memory alloy based adaptive short wave antenna according to claim 1, characterized in that: the bottom of the antenna base (100) is connected with a fixed mounting seat (400) through screws.
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| CN202311446865.6A CN117276846B (en) | 2023-11-02 | 2023-11-02 | Shape memory alloy-based self-adaptive short wave antenna |
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| CN202311446865.6A CN117276846B (en) | 2023-11-02 | 2023-11-02 | Shape memory alloy-based self-adaptive short wave antenna |
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| CN117276846B true CN117276846B (en) | 2024-03-05 |
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