CN103887582B - A kind of continuous adjustable superconducting System of PC control multi-operation mode - Google Patents
A kind of continuous adjustable superconducting System of PC control multi-operation mode Download PDFInfo
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- CN103887582B CN103887582B CN201410096206.9A CN201410096206A CN103887582B CN 103887582 B CN103887582 B CN 103887582B CN 201410096206 A CN201410096206 A CN 201410096206A CN 103887582 B CN103887582 B CN 103887582B
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Abstract
The present invention discloses a kind of continuous adjustable height temp. superconductive filter system of PC control multi-operation mode, belongs to short-wave communication tedhnology apparatus field. This system comprises adjustable super conductive filter and frequency control circuit, also comprises cryogenic vacuum Dewar, refrigeration machine and temperature-control circuit thereof, and host computer, and described frequency control circuit is made up of programmable single chip computer and DA module; This is adjustable, and super conductive filter is placed in cryogenic vacuum Dewar, refrigeration machine is connected with cryogenic vacuum Dewar, described adjustable super conductive filter is connected with frequency control circuit, host computer communicates by serial ports and frequency control circuit, and described adjustable super conductive filter adopts continuous adjustable high temperature superconduction wave filter. The present invention has modularization in system, is easy to and other equipment cascadings, on the feature bases such as stable working state, realize the adjustable in real time continuously of centre frequency, and mode of operation can be according to user's request, expand and change, strengthen diversity and the flexibility of system works pattern.
Description
Technical field
The invention belongs to microwave communication equipment technical field, particularly a kind of PC control multi-operation mode is adjustable continuouslySuperconducting System.
Background technology
Receiver rf front-end subsystem all plays vital effect in various dual-use communication systems. Its technology refers toMark and characteristic are the keys of whole communication system performance. If wherein filter center frequency is adjustable, for whole communication systemIn band, the flexibility of antijamming capability and mode of operation has very big lifting, in the situation that communication system operating frequency changes,Still can realize signal filtering most important for Modern Communication System with amplification, the frequency spectrum resource being becoming tight day now, frequency hopping,The demand of the technology such as dynamic frequency allocation is also more and more urgent, the continuous adjustable receiving system in receiver rf front-end subsystemDevelopment, particularly tunable filter system wherein more and more paid attention to.
High temperature superconducting materia is almost 0, high quality factor (Q value) because of its sheet resistance. Since self-discovery, byBe widely used in the making of microwave filter. This high temperature superconduction wave filter can greatly improve receiver sensitivity and anti-interference energyPower. But the communication system of most integrated high temperature superconduction wave filter does not possess the continuously adjustable performance of centre frequency. And developAdjustable height temp. superconductive filter system, can further improve the antijamming capability of communication system, and increases system works mould continuouslyThe flexibility of formula.
Tradition tunable filter system forms as shown in Figure 1, mainly formed by tunable filter and frequency control circuit, itsIn, the FREQUENCY CONTROL element of the output of frequency control circuit and tunable filter is connected (for example VVC voltage variable capacitance), adjustableThe output of wave filter is connected with the input of amplifier. Signal is input in tunable filter, regulates through frequency control circuitAlthough the traditional tunable filter system of output also can realize the adjusting of operating frequency after frequency, there are following shortcoming needs gramClothes:
1, the loss of conventional material is larger, and sensitivity and the antijamming capability of the tunable filter system of being made up of it obviously fallLow.
2, control model is single, generally only contains a mode of operation, and the flexibility ratio that pattern is switched is not high yet.
Summary of the invention
The object of the invention is to the weak point for overcoming prior art, design a kind of company of PC control multi-operation modeContinuous adjustable height temp. superconductive filter system, this system can realize the repertoire of conventional tunable radio frequency front end, meets the work that realizesFrequency is adjustable, signal is selected the requirement of amplifying. High sensitivity and antijamming capability are also realized. And can design many simultaneouslyPlant mode of operation and switch for user, real time modifying according to demand. The index that possesses skills excellence, mode of operation are switched flexibly and canThe features such as expansion, simple and convenient user operation.
For realizing object of the present invention, by the following technical solutions:
This system comprises adjustable super conductive filter and frequency control circuit, it is characterized in that, also comprise cryogenic vacuum Dewar,Refrigeration machine and temperature-control circuit thereof, and host computer, described frequency control circuit is by programmable single chip computer and DA module groupBecome; This is adjustable, and super conductive filter is placed in cryogenic vacuum Dewar, and refrigeration machine is connected with cryogenic vacuum Dewar, by temperature controlThe control of circuit to refrigeration machine, to maintain the low-temperature working environment in cryogenic vacuum Dewar; Described adjustable super conductive filter is with frequentlyRate control circuit is connected, and host computer communicates by serial ports and frequency control circuit, realizes turning of system different working modesChange, realize multi-frequency working method. Described adjustable super conductive filter adopts continuous adjustable high temperature superconduction wave filter, forRealize centre frequency and can be in harmonious proportion continuously low insertion loss within the scope of certain frequency.
Described refrigeration machine and control circuit thereof and cryogenic vacuum Dewar, for maintaining the required low temperature environment of system works.
Described mode of operation is divided into: fixed point frequency-selecting pattern, continuous frequency sweep mode, multichannel frequency-selecting pattern. Described mode of operationCan be according to user's request by mcu programming being expanded and revising.
Described frequency control circuit is for realizing various changes by the control program of the programmable single chip computer storage to whereinThe working method of filter center frequency, and realize the real-time switching of various patterns by the serial communication of single-chip microcomputer and host computerWith frequency choose in real time function.
Feature of the present invention and beneficial effect:
It is anti-interference outside the original centre frequency tunable characteristic of continuous adjustable high temperature superconduction wave filter and band that system of the present invention has keptCharacteristic; Single-chip microcomputer in frequency control circuit can be communicated by letter with host computer (computer), and then realizes host computer to adjustable filteringThe real-time selection of device working frequency points; The present invention has modularization in system, is easy to and other equipment cascadings stable working stateOn feature basis, realize the adjustable in real time continuously of centre frequency, can be applicable in radio-frequency front-end system, as high-performanceFrequency-selective system. Can write and computer control by control circuit internal processes, realize different working modes and theySwitch fast, and mode of operation can be according to user's request, expands and changes, and has strengthened the various of system works patternProperty and flexibility.
Brief description of the drawings
Fig. 1 tradition tunable filter system architecture schematic diagram;
Fig. 2 continuous adjustable height temp. superconductive filter system structural representation of the present invention;
The high temperature superconduction wave filter circuit diagram of embodiment 1 in Fig. 3 the present invention;
The control procedure schematic diagram of embodiment 1 in Fig. 4 the present invention;
In Fig. 5 the present invention, embodiment 1 is stored in the control flow block diagram in programmable single chip computer;
The performance test curve of embodiment 1 in Fig. 6 the present invention;
Detailed description of the invention
The continuous adjustable height temp. superconductive filter system of a kind of PC control multi-operation mode that the present invention proposes by reference to the accompanying drawingsAnd embodiment is described in detail as follows:
The continuous adjustable height temp. superconductive filter system of a kind of PC control multi-operation mode that the present invention proposes, comprises adjustableSuper conductive filter and frequency control circuit, is characterized in that, also comprises cryogenic vacuum Dewar, refrigeration machine and temperature control thereofCircuit, and host computer, described frequency control circuit is made up of programmable single chip computer and DA module; Superconduction filtering that this is adjustableDevice is placed in cryogenic vacuum Dewar, and refrigeration machine is connected with cryogenic vacuum Dewar, the control by temperature-control circuit to refrigeration machine,To maintain the low-temperature working environment in cryogenic vacuum Dewar; Described adjustable super conductive filter is connected with frequency control circuit, upperMachine communicates by serial ports and frequency control circuit, realizes the conversion of system different working modes, realizes multi-frequency workMode. Described adjustable super conductive filter adopts continuous adjustable high temperature superconduction wave filter, for realizing centre frequency at certain frequencyWithin the scope of rate, can be in harmonious proportion continuously low insertion loss.
Described refrigeration machine and control circuit thereof and cryogenic vacuum Dewar, for maintaining the required low temperature environment of system works.
Described mode of operation is divided into: fixed point frequency-selecting pattern, continuous frequency sweep mode, multichannel frequency-selecting pattern. Described mode of operationCan be according to user's request by mcu programming being expanded and revising.
Described frequency control circuit is by the control program to programmable single chip computer storage wherein, for realizing various change filtersThe working method of ripple device centre frequency, and by the serial communication of single-chip microcomputer and host computer realize various patterns real-time switching andFrequency choose in real time function.
The continuous adjustable height temp. superconductive filter system embodiment of a kind of PC control multi-operation mode that the present invention proposes isSystem structure as shown in Figure 2. This system comprises continuous adjustable high temperature superconduction wave filter, cooled cryostat, refrigeration machine and temperature control thereofCircuit processed, the frequency control circuit and the host computer that are formed by programmable single chip computer and DA module; This continuous adjustable height temp. superconductiveWave filter is placed in cryogenic vacuum Dewar, and refrigeration machine is connected with cryogenic vacuum Dewar, by temperature-control circuit to refrigeration machineControl, to maintain the low-temperature working environment in cryogenic vacuum Dewar; Continuous adjustable high temperature superconduction wave filter is by FREQUENCY CONTROL electricityRoad is connected with host computer (computer), and host computer and frequency control circuit communicate, and export by frequency control circuitThe centre frequency of control signal control wave filter. Realize turning of system different working modes by the program of storing in host computerChange, realize multi-frequency control mode.
Function and the specific implementation of each parts of the present embodiment are respectively described below:
1. cooled cryostat: cooled cryostat adopts the vacuum chamber that a seal is good, maintains vacuum below 10-5 handkerchief. For heightTemp. superconductive wave filter provides required low temperature environment.
2. refrigeration machine: the CryoTelMT type refrigeration machine that adopts SUNPOWER company in the present embodiment. By refrigeration machine certainlyThe temperature-control circuit of band, to Dewar internal cooling, can be stablized and control high temperature superconduction wave filter in superconducting transition temperature(70K) below.
3. continuous adjustable high temperature superconduction wave filter: in the present embodiment, select centre frequency 194MHz between 232MHz continuouslyAdjustable, high-end insertion loss is less than the high temperature superconduction wave filter of 0.2dB. Realize the adjustable continuously of centre frequency, entered oneAntijamming capability and sensitivity that step has improved system.
High temperature superconduction wave filter circuit in the present embodiment as shown. For Chebyshev's mode filter, exponent number is 4 joints, for micro-Band structure, is placed in encapsulation box.
Resonator 1 circuit of this wave filter adopts four identical quarter-wave single coil configuration, each single coil configurationSpiral center is connected with a voltage-controlled variable ground capacity 3 by a bonding wire 2. Also comprise with voltage-controlled variable ground capacity 3 and being connectedPower up end 4, can add the capacitance of electric control variable capacitance powering up end 4 sealing wires, and then change the frequency of resonator,Can realize the adjusting of the centre frequency to wave filter.
4. frequency control circuit: this circuit is made up of programmable single chip computer and DA module. This control circuit adopts stc company89C52 programmable single chip computer as control chip, DA module adopt Texas Instruments produce AMC7812 chip. LogicalCross single-chip microcomputer is programmed and realized the working method of various change filter center frequencies, by the string of single-chip microcomputer and host computerPort communications is realized the functions such as choosing in real time of the real-time switching of above-mentioned pattern and frequency, by control chip control DA moduleVoltage-output, the voltage of change varactor, to reach the function of regulating frequency. The max232 chip that Maxim is produced alsoBe integrated on frequency control circuit, for host computer by serial ports the level conversion to frequency control circuit transmitted signal.
5. host computer adopts the conventional PC with serial communication, arranges a series of etc. in host computer user interfaceThe discrete frequency at interval, user can carry out at interface the selection of mode of operation, in the time choosing a certain frequency, sends by serial portsControl signal passes to single-chip microcomputer, and single chip machine controlling circuit makes filter center frequency shift (FS) to corresponding frequency, can realize multipleMode of operation, and can between various modes, freely switch (realizing the function that similar multichannel is selected).
Frequency control circuit in the present embodiment has been realized fixed point frequency-selecting, continuous frequency sweep, three kinds of mode of operations of multichannel frequency-selecting, realExecute process as follows:
User's control procedure of three kinds of mode of operations as shown in Figure 4.
Pattern 1: frequency sweep mode continuously. User chooses after this pattern by host computer, sends to frequency control circuit. ControlThe continuous circulation scanning voltage of circuit output 1V to 10V. Realize frequency sweep function.
Pattern 2:16 road frequency-selecting pattern. By measuring equally spaced 16 magnitudes of voltage that frequency is corresponding, at FREQUENCY CONTROL electricity16 frequency voltage datas of single-chip microcomputer storage inside on road. When user chooses this pattern and chooses after response frequency single-chip microcomputerBy tabling look-up, choose the respective value output voltage in form, choose the frequency that user needs.
Mode 3: fixed point frequency-selecting pattern. First the relation of voltage and center frequency point is carried out to discrete test, choose ten frequenciesMeasure voltage. Then, voltage and frequency relation curve are carried out to matching, can extrapolate specific center frequently by matched curveThe magnitude of voltage that rate is corresponding, obtains the one-to-one relationship of frequency and input voltage. When user chooses this pattern and chooses response frequentlyAfter point, host computer inverse goes out required voltage, and data send single-chip microcomputer to by serial ports, the output of Single-chip Controlling DA moduleCorresponding Voltage-output, chooses the frequency (control centre's frequency is user's input point) that user needs.
Described mode of operation, need first test, and obtains the data of the corresponding relation of voltage and frequency, and carries out matching. RootCan be according to the frequency values of user's input according to matched curve, the anti-magnitude of voltage of releasing sends to single-chip microcomputer, and then regulates centre frequency to reachTo user's request.
For realizing this three kinds of mode of operations, be stored in program circuit in programmable single chip computer as shown in Figure 5:
First the signal judgement sending to control circuit according to host computer: if signal is mode select signal, be switched to phaseAnswer pattern, and wait for the signal of corresponding modes; If signal is not mode select signal, will be according to current mode of operationSend data, if present mode is pattern 2, this signal is that path is selected signal; If present mode is mode 3,This signal is that frequency is selected signal so, and according to corresponding signal, control circuit obtains the DA module output voltage needing,And then reach the effect of controlled frequency.
Above-mentioned said mode of operation also can, according to user's request, be revised by programming.
Fig. 6 is the performance test curve that embodiment 1 is operated in different center frequency. Can be found out adjustable system by test curveThe coverage of centre frequency from 194MHz to 232MHz, high-end insertion loss is less than 0.2dB, has realized skill of the present inventionSuperiority in art feature.
Claims (1)
1. a continuous adjustable height temp. superconductive filter system for PC control multi-operation mode, comprises adjustable superconduction filteringDevice and frequency control circuit, is characterized in that, also comprises cryogenic vacuum Dewar, refrigeration machine and temperature-control circuit thereof, withAnd host computer, described frequency control circuit is made up of programmable single chip computer and DA module; This is adjustable, and super conductive filter is placed in lowIn temperature vacuum dewar, refrigeration machine is connected with cryogenic vacuum Dewar, and the control by temperature-control circuit to refrigeration machine, to maintainLow-temperature working environment in cryogenic vacuum Dewar; Described adjustable super conductive filter is connected with frequency control circuit, and host computer passes throughSerial ports and frequency control circuit communicate, and realize the conversion of system different working modes, realize multi-frequency working method;Described adjustable super conductive filter adopts continuous adjustable high temperature superconduction wave filter, for realizing centre frequency in certain frequency scopeIn can be in harmonious proportion continuously low insertion loss;
Described refrigeration machine and control circuit thereof and cryogenic vacuum Dewar, for maintaining the required low temperature environment of system works;
Described mode of operation is divided into: fixed point frequency-selecting pattern, continuous frequency sweep mode, multichannel frequency-selecting pattern; Described mode of operationCan be according to user's request by mcu programming being expanded mode of operation and revising;
Described frequency control circuit is for realizing various changes by the control program of the programmable single chip computer storage to whereinThe working method of filter center frequency, and realize the real-time switching of various patterns by the serial communication of single-chip microcomputer and host computerWith frequency choose in real time function;
The resonator circuit of this wave filter adopts four identical quarter-wave single coil configuration, each single coil configuration spiral shellRevolving center is connected with a voltage-controlled variable ground capacity by a bonding wire; Also comprise and powering up that voltage-controlled variable ground capacity is connectedEnd, is powering up end sealing wire and is powering up, and controls the capacitance of variable capacitance, and then changes the frequency of resonator, realizes filterThe adjusting of the centre frequency of ripple device.
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| CN106033955B (en) * | 2015-03-11 | 2019-02-15 | 中国兵器科学研究院 | A kind of bandpass filter and antenna combiner |
| CN105224971B (en) * | 2015-10-12 | 2018-01-12 | 中国科学院上海光学精密机械研究所 | The evaporation cooled RF scanning means and method of superhigh precision |
| CN108646094A (en) * | 2018-06-25 | 2018-10-12 | 成都特锐迈思科技有限公司 | Low-temperature microwave sheet resistance multimode test device and method |
| CN109216858A (en) * | 2018-10-22 | 2019-01-15 | 郑州科之诚机床工具有限公司 | A kind of continuously adjustable super conductive filter, system and preparation method |
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| CN102026235A (en) * | 2010-12-07 | 2011-04-20 | 广州特信网络技术有限公司 | Superconducting link system |
| CN102473991A (en) * | 2009-07-20 | 2012-05-23 | Ace技术株式会社 | Automatically controllable frequency tunable filter |
| CN203071199U (en) * | 2012-12-28 | 2013-07-17 | 中国电子科技集团公司第十六研究所 | Waveguide converter for high-temperature superconductive reception front |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102473991A (en) * | 2009-07-20 | 2012-05-23 | Ace技术株式会社 | Automatically controllable frequency tunable filter |
| CN102026235A (en) * | 2010-12-07 | 2011-04-20 | 广州特信网络技术有限公司 | Superconducting link system |
| CN203071199U (en) * | 2012-12-28 | 2013-07-17 | 中国电子科技集团公司第十六研究所 | Waveguide converter for high-temperature superconductive reception front |
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