Airborne C-band power amplifierTechnical field
The present invention discloses a kind of airborne C-band power amplifier, the microwave communication on particularly suitable aircraft.
Background technology
Aviation electronics refers to the summation of all electronic systems on aircraft, and the electronic equipment on aircraft must is fulfilled for a series of severeThe design constraint at quarter, complicated electromagnetic environment, low pressure, spread of voltage, working environment are extremely severe.Airborne equipment must beReliably worked under this environment, while to the weight of equipment, volume, also there is the requirement of harshness.Electronic equipment volume is small, weightThe light increase for meaning that power density of amount, and microwave power amplifier is the of a relatively high equipment of power consumption, is then increased againThe cooling system of high power density equipment.This complicated working environment causes the safeguards system of air environment to increase,The bulking value of mutually deserved total equipment is significantly increased, and this wants small volume, requirement in light weight into contradiction with airborne equipment.
Utility model content
Problem to be solved in the utility model is how to reduce the volume and weight of airborne equipment, there is provided a kind of modularization journeySpend height, small volume, in light weight, the good airborne equipment of ambient adaptability.
To solve the above problems, the technical scheme that the utility model is taken is：
Airborne C-band power amplifier, including electromagnetic compatibility module, Anti-surging module and work/silent circuit, voltage turnChange the mold block, controllable gain amplifying unit, sequential control circuit, AGC control circuits and state reporting circuit；
External power source is connected with the input port of electromagnetic compatibility module；The output port of electromagnetic compatibility module and Anti-surging mouldThe input port of block is connected；The output port of Anti-surging module is connected with the power input port of voltage transformation module；
The output port of power source of voltage transformation module respectively with controllable gain amplifying unit, AGC control circuits, state reportingCircuit, sequential control circuit are connected with the power input port of work/silent circuit；
The rf inputs mouth of controllable gain amplifying unit is connected with external radio-frequency signal, radio frequency output port and outside dayLine is connected, detection output port respectively with the detection input port of state reporting circuit and the detection input of AGC control circuitsMouth is connected；
The AGC control output ends mouth of AGC control circuits is connected with the AGC control inputs port of controllable gain amplifying unit；
The state output port of state reporting circuit is communicated with the outside；
The work of work/silent circuit/silent control input port is communicated with the outside, power supply output port and voltageThe power supply enable port of modular converter is connected；
The sequential export port of sequential control circuit is connected with the sequential enable port of voltage transformation module.
Wherein, controllable gain amplifying unit includes voltage-controlled attenuator, the first one chip amplifier, the first isolator, the second listPiece amplifier, the first power tube, the second isolator, the second power tube, shunt, the 3rd power tube, the 4th power tube, combiningDevice, the 3rd isolator and termination power；Described voltage-controlled attenuator, the first one chip amplifier, the first isolator, the second monolithic are putBig device, the first power tube, the second isolator, the second power tube and shunt mutually cascade；The output port of shunt respectively withThe input port of 3rd power tube and the 4th power tube is connected；The output port of 3rd power tube and the 4th power tube respectively with conjunctionThe input port of road device is connected；The output port of combiner is connected with the input port of the 3rd isolator；3rd isolator it is defeatedThe input port of exit port and termination power；The radio frequency output port of coupler is communicated with the outside, detection output port respectively withThe detection input port of state reporting circuit is connected with the detection input port of AGC control circuits.
Wherein, modules use gallium nitride device.
Wherein, described termination power uses high directionality coupler.
Wherein, fin is provided with the airborne C-band power amplifier, fin is exposed outside the cabin of amplifierPortion.
The utility model compared with prior art the advantages of be：
1. small volume, in light weight；
2. it is wide to be applicable operating voltage range；Applicable working temperature scope is wide；
3. ensure that equipment is few, without extra power supply processing and radiating treatment circuit.
4. Electro Magnetic Compatibility is good, there is good anti-surge voltage technology, can directly use the electric set electric supply of aircraft,Extra power supply processing circuit is increased without, while goes for high aerial adverse circumstances.
5. having good linear index, there is preferable multimachine compatibility.
Brief description of the drawings
The airborne C-band power amplifier theory diagram of Fig. 1 the utility model.
Fig. 2 the utility model controllable gain amplifying unit theory diagrams.
Fig. 3 the utility model power combing theory diagrams.
Fig. 4 the utility model twisted wire schematic diagrames.
Fig. 5 the utility model AGC control principle block diagrams.
Embodiment
The utility model will be further described by 1-5 below in conjunction with the accompanying drawings：
If Fig. 1 is the airborne C-band power amplifier theory diagram of the utility model, modules use gallium nitride devicePart, including electromagnetic compatibility module, Anti-surging module and work/silent circuit, voltage transformation module, controllable gain amplifying unit,Sequential control circuit, AGC control circuits and state reporting circuit；
External power source is connected with the input port of electromagnetic compatibility module；The output port of electromagnetic compatibility module and Anti-surging mouldThe input port of block is connected；The output port of Anti-surging module is connected with the power input port of voltage transformation module；
The output port of power source of voltage transformation module respectively with controllable gain amplifying unit, AGC control circuits, state reportingCircuit, sequential control circuit are connected with the power input port of work/silent circuit；
The rf inputs mouth of controllable gain amplifying unit is connected with external radio-frequency signal, radio frequency output port and outside dayLine is connected, detection output port respectively with the detection input port of state reporting circuit and the detection input of AGC control circuitsMouth is connected；
The AGC control output ends mouth of AGC control circuits is connected with the AGC control inputs port of controllable gain amplifying unit；
The state output port of state reporting circuit is communicated with the outside；
The work of work/silent circuit/silent control input port is communicated with the outside, power supply output port and voltageThe power supply enable port of modular converter is connected；
The sequential export port of sequential control circuit is connected with the sequential enable port of voltage transformation module.
Such as Fig. 2 the utility model controllable gain amplifying unit theory diagrams, controllable gain amplifying unit includes voltage-controlled decayDevice, the first one chip amplifier, the first isolator, the second one chip amplifier, the first power tube, the second isolator, the second power tube,Shunt, the 3rd power tube, the 4th power tube, combiner, the 3rd isolator and termination power；Described voltage-controlled attenuator,One one chip amplifier, the first isolator, the second one chip amplifier, the first power tube, the second isolator, the second power tube and branchDevice mutually cascades；Input port of the output port of shunt respectively with the 3rd power tube and the 4th power tube is connected；3rd work(The output port of rate pipe and the 4th power tube is connected with the input port of combiner respectively；The output port of combiner and the 3rd everyInput port from device is connected；The output port of 3rd isolator and the input port of termination power；The radio frequency of termination power is defeatedExit port is communicated with the outside, detection output port respectively with the detection input port of state reporting circuit and AGC control circuitsDetection input port is connected, and termination power uses high directionality coupler.
Such as Fig. 3 the utility model power combing theory diagrams, circuit synthesis includes shunt, power tube and combiner threePart.The simple principle of power combing is：Input signal is distributed to each road power tube by shunt and carries out power amplification, then is led toCross combiner and the output signal of each road power tube is carried out power combing.Because power combing is Vector modulation, to reach higherCombined coefficient, it is necessary to shunt, the amplitude of power tube and combiner and phase characteristic will meet some requirements.
Such as Fig. 4 the utility model twisted wire theory diagrams, it can cut different length according to different frequencies, according toDifferent power capacity, from different line footpaths.It is easy to use in the product of design and the batch production of circuit, and volumeIt is small, it is in light weight.
Such as Fig. 5 the utility model AGC automatic gain control circuit theory diagrams, it, which is acted on, is changed in input signal amplitudeIn the case of very big, a kind of automatic automatic control circuit for keeping amplitude output signal to change in the range of very little.Automatic gainControl circuit is made up of feedback controller and controlled device two parts.Wherein feedback controller is by level detector, LPFDevice, dc amplifier, voltage comparator and control voltage maker composition, controlled device is main amplifier.
Power amplifier of the present utility model is high-power heat generating components, radiator in whole product weight accounting weight compared withGreatly, optimization radiator is an important means of product loss of weight.In this product structure design, fin is passed through into cabin skinThe mode of perforate is exposed to outside cabin by the fin of power amplifier.Using in aircraft flight, the cross-ventilation of high speed outside coveringRadiated.Improve radiating efficiency, in the case of equal heat consumption, required area of dissipation reduces, and product weight mitigates.
Principle of the present utility model is：
Power supply come in after first through electromagnetic compatibility wave filter, then by Anti-surging module, then give photovoltaic conversion module for power supply,Stable voltage is most converted into through voltage transformation module afterwards, power tubes at different levels is supplied and control circuit uses.
Microwave signal, which comes in enter the first order after voltage-controlled attenuator, amplifies, and then through isolator, into the second level, leads toThe second level and third level amplification are crossed, then by isolator, is amplified into the fourth stage, then amplify through shunt, level V, combiningDevice, finally by isolator, termination power to output interface.
TTL low and high levels are directly reached control circuit by control signal, pass through control circuit control voltage modular converterSwitch, to reach corresponding work/silence requirement.The microwave circuit of power amplifier employs power synthetic technique, output workRate grade lifts one times；AGC automatic gain controls are employed, power amplifier is operated in back-off state, and output linearity is good.