CN108616275A - A kind of use for laboratory small microwave signal source - Google Patents
A kind of use for laboratory small microwave signal source Download PDFInfo
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- CN108616275A CN108616275A CN201810860568.9A CN201810860568A CN108616275A CN 108616275 A CN108616275 A CN 108616275A CN 201810860568 A CN201810860568 A CN 201810860568A CN 108616275 A CN108616275 A CN 108616275A
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
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Abstract
The invention discloses a kind of use for laboratory small microwave signal sources, belong to microwave regime.The use for laboratory small microwave signal source includes microwave frequency source module and control module；Microwave frequency source module includes FPGA, phase-locked loop circuit, amplifier, numerical-control attenuator, constant-temperature crystal oscillator, and FPGA is connect with phase-locked loop circuit, and phase-locked loop circuit is connect with amplifier, and amplifier is connect with numerical-control attenuator；Control module is used to send control signal to FPGA and shows the real-time status for the microwave signal that microwave frequency source module exports；Constant-temperature crystal oscillator is used to provide reference signal for FPGA and phase-locked loop circuit；FPGA is used to control the output signal frequency of phase-locked loop circuit according to control signal；Phase-locked loop circuit, amplifier and numerical-control attenuator are used to adjust the microwave signal that output meets preset state information；Solve the problems, such as the of high cost of existing microwave signal source, demand of the portioned product to microwave signal source is lower in R＆D process, achievees the effect that reduce cost.
Description
Technical field
The present embodiments relate to microwave regime, more particularly to a kind of use for laboratory small microwave signal source.
Background technology
Microwave signal source is a kind of experimental facilities indispensable in laboratory, and the performance for being widely used in the products such as receiver refers to
Mapping is tried and scheduling and planning.
The microwave signal source of most of mainstream is to purchase certainly external or domestic higher price equipment on the market at present, one
Denier research and development program element needs scale of mass production, it will influences very much the speed of production and efficiency of company.
Invention content
In order to solve problems in the prior art, an embodiment of the present invention provides a kind of use for laboratory small microwave signal sources.
The technical solution is as follows：
In a first aspect, a kind of use for laboratory small microwave signal source is provided, including microwave frequency source module and display are controlled
Control equipment；
Microwave frequency source module includes FPGA, phase-locked loop circuit, amplifier, numerical-control attenuator, constant-temperature crystal oscillator, FPGA and lock
Phase loop circuit connects, and phase-locked loop circuit is connect with amplifier, and amplifier is connect with numerical-control attenuator；
Display control apparatus is used to send control signal to FPGA and shows the microwave signal that microwave frequency source module exports
Real-time status, control signal include microwave signal preset state information, status information includes frequency, power and waveform；
Constant-temperature crystal oscillator is used to provide reference signal for FPGA and phase-locked loop circuit；
FPGA is used to control the output signal frequency of phase-locked loop circuit according to control signal；
Phase-locked loop circuit, amplifier and numerical-control attenuator are used to adjust the microwave signal that output meets preset state information.
Optionally, phase-locked loop circuit includes phase discriminator, loop filter, VCO chips, power splitter and frequency divider；
FPGA is connect with phase discriminator, and FPGA is used to send control signal to phase discriminator according to control signal, controls signal packet
Include the preset state information of microwave signal；
The output end of phase discriminator and the input terminal of loop filter connect, output end and the VCO chips of loop filter
Input terminal connects, and the output end of VCO chips is connect with power splitter；
The input terminal of the connection frequency divider of output all the way of power splitter, the output end of frequency divider are connect with phase discriminator；
The another way output of power splitter is connect with the input terminal of amplifier, and the another way output of power splitter is as phaselocked loop electricity
The output on road；
Phase discriminator is used to receive the output signal of the control signal and frequency divider of FPGA transmissions, compares phase discriminator reference signal
It is fed back with the output signal of frequency divider, exports analog level signal corresponding with comparison result；
VCO chips are used for the correspondence according to level and frequency, and the frequency of the output signal of phase-locked loop circuit is adjusted
For frequency corresponding with the analog level signal of loop filter is passed through.
Optionally, constant-temperature crystal oscillator is used to provide the reference signal of 100M for the phase discriminator in FPGA and phase-locked loop circuit.
Optionally, control module is PC machine；
PC machine is connect with FPGA by RS232 buses.
Optionally, control module is made of microcontroller, LCD screen and keyboard；
Microcontroller is separately connected with LCD screen, keyboard；
Microcontroller is connect with FPGA, and microcontroller is used to send SPI signal to FPGA, and SPI signal includes the pre- of microwave signal
If status information, status information includes frequency, power and waveform.
Optionally, microwave frequency source module further includes power module；
Power module is used to be Microwave Frequency Source module for power supply.
Optionally, VCO chips are broadband VCO chips.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
The use for laboratory small microwave signal source includes microwave frequency module and display control apparatus, microwave frequency source module
Including FPGA, phase-locked loop circuit, amplifier, numerical-control attenuator, constant-temperature crystal oscillator, Microwave Frequency Source is controlled using display control apparatus
The output frequency of module is widened frequency band function using the phase-locked loop circuit realization in microwave frequency source module, is selected in component
Upper most of selection domestics, the external device in part is also the model largely used in the industry, reduces cost, solves existing
The problem of high cost of microwave signal source has reached the lower feelings of demand of the portioned product to microwave signal source in R＆D process
Under condition, the cost of microwave signal is reduced, improves the effect of property easy to use.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of structure diagram of use for laboratory small microwave signal source shown according to an exemplary embodiment；
Fig. 2 is a kind of schematic diagram of power module shown according to an exemplary embodiment.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Referring to FIG. 1, it illustrates the structures of use for laboratory small microwave signal source provided by one embodiment of the present invention
Schematic diagram.
As shown in Figure 1, the use for laboratory small microwave signal source includes microwave frequency source module and control module.
Optionally, the equipment that control module is made of microcontroller, LCD screen and keyboard, or, control module is PC machine.
The microwave that control module is used to control the microwave signal of microwave frequency source module output, display Microwave Frequency Source exports
The real-time status of signal.
Microwave frequency source module includes FPGA, phase-locked loop circuit, amplifier, numerical-control attenuator, constant-temperature crystal oscillator, FPGA and lock
Phase loop circuit connects, and phase-locked loop circuit is connect with amplifier, and amplifier is connect with numerical-control attenuator.The output of numerical-control attenuator is believed
Number be the laboratory room small-sized microwave signal source microwave signal.
Wherein, display control apparatus is connect with FPGA.
Display control apparatus sends control signal to FPGA.
Control signal includes the preset state information of microwave signal, and status information includes frequency, power and waveform.
Constant-temperature crystal oscillator is used to provide reference signal for FPGA and phase-locked loop circuit.
Optionally, constant-temperature crystal oscillator provides the reference signal of 100M for FPGA.
FPGA is used to control the output signal frequency of phase-locked loop circuit according to control signal.
Phase-locked loop circuit, amplifier and numerical-control attenuator are used to adjust the microwave signal that output meets preset state information.
Phase-locked loop circuit adjusts the frequency of microwave signal, output of the amplifier to phase-locked loop circuit according to preset state information
Signal carries out power amplification, and numerical-control attenuator adjusts the output signal of amplifier according to preset state information.
Optionally, FPGA is connect with numerical-control attenuator, and FPGA sends adjustable attenuation word to numerical-control attenuator, and control numerical control declines
Subtract the pad value of device.
When the equipment that display control apparatus is made of microcontroller, LCD screen and keyboard, microcontroller and keyboard, LCD screen
Curtain is separately connected, and keyboard is used to input the preset state information of microwave signal, and microcontroller converts the information that keyboard inputs to SPI
Signal, LCD screen show the real-time status of the microwave signal of microwave frequency source module output.
Microcontroller is connect with the FPGA in microwave frequency source module, and microcontroller sends SPI signal, SPI signal packet to FPGA
The preset state information of microwave signal is included, status information includes frequency, power and waveform.
When display control apparatus is PC machine, PC machine is connect with FPGA by RS232 buses, is sent out by RS232 under PC machine
Send control signal.
As shown in Figure 1, phase-locked loop circuit includes phase discriminator, loop filter, VCO chips, power splitter and frequency divider.
FPGA is connect with phase discriminator.
FPGA sends control signal according to control signal to phase discriminator, and control signal includes the preset state letter of microwave signal
Breath.
The output end of phase discriminator and the input terminal of loop filter connect, and output end and the VCO chips of loop filter connect
It connects, the output end of VCO chips is connect with power splitter.
The input terminal of the connection frequency divider of output all the way of power splitter, the input terminal of the another way output and amplifier of power splitter
Connection；As feedback signal, the another way of power splitter exports the output as phase-locked loop circuit for the output all the way of power splitter.
The output end of frequency divider is connect with phase discriminator.
Since phase discriminator can only receive the signal of 0-8GHz, the output signal of phase-locked loop circuit is when other than 0-8GHz
Enable phase-locked loop circuit that can work normally, need to increase frequency divider, using frequency divider to the output signal of power splitter at
Reason so that phase discriminator can work normally.
Suitable power splitter is selected according to the frequency of the output signal of phase-locked loop circuit, for example the frequency of output signal is 0-
When 16GHz, two-divider is selected, when the frequency of output signal is more than 16GHz, selection can adjust the frequency of feedback signal
To the frequency divider of the more high frequency division ratio of 0-8GHz.
Phase discriminator receives the control signal that FPGA is sent, and receives the output signal of frequency divider,
Phase discriminator compares the reference signal of phase discriminator and the output signal feedback of frequency divider, and output is corresponding with comparison result
Analog level signal.
Optionally, constant-temperature crystal oscillator provides the reference signal of 100M for phase discriminator.
Phase discriminator compares the height of the present operating frequency and the frequency in preset state information of phase-locked loop circuit, according to than
Relatively result adjustment output analog level signal is to adjust the working frequency of phase-locked loop circuit.
The analog level signal of phase discriminator output enters VCO chips after entering loop filter, and different VCO chips have
The correspondence of different level and frequency.
VCO chips according to the correspondence of level and frequency, by the frequency of the output signal of phase-locked loop circuit be adjusted to
By the corresponding frequency of the analog level signal of loop filter.
Due to phase-locked loop circuit be negative-feedback circuit, after the adjustment of certain time, phase-locked loop circuit can export in advance
If the consistent signal of frequency values in status information.
Optionally, VCO chips are broadband VCO chips.
Optionally, microwave frequency source module further includes power module, and power module provides electricity for microwave frequency source module.
As shown in Fig. 2, the input power of power module is+15V ,+15V is converted to by+12V and+5V electricity by voltage-stablizer
Source ,+12V power supplys are powered for constant-temperature crystal oscillator, and+5V the power supplys converted all the way by voltage-stablizer decline into VCO chips, frequency divider, numerical control
Subtract device, amplifier power supply；Power module provides+3.3V power supplys for phase discriminator, and+2.5V power supplys are provided for FPGA；Power module is also
Offer+1.2V power supplys.
Power module uses LDO (low dropout regulator) linear voltage stabilization.
Use for laboratory small microwave signal source provided in an embodiment of the present invention occupies little space, and volume is no more than 100mm*
100mm*30mm, weight is no more than 1kg, portable.
It is 8- that the output signal of use for laboratory small microwave signal source provided in an embodiment of the present invention, which can reach working band,
16GHz, stepping 100kHz, output power are -11dBm~20dBm, stepping 1dB.If desired realize finer frequency stepping and
Power stepping can adjust the program in FPGA according to actual needs.
Use for laboratory small microwave signal source provided in an embodiment of the present invention, can by replace different frequency range VCO, and
Control the microwave signal that program realizes output 0-8GHz or 16GHz or more.
For use for laboratory small microwave signal source provided in an embodiment of the present invention by broadband p LL circuits, output signal is miscellaneous
Control is dissipated more than -70dBc, and phase of output signal noise can reach -80dBc/Hz@100Hz, -90dBc/Hz@1kHz.
It should be noted that：The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of use for laboratory small microwave signal source, which is characterized in that including microwave frequency source module and control module；
The microwave frequency source module includes FPGA, phase-locked loop circuit, amplifier, numerical-control attenuator, constant-temperature crystal oscillator, the FPGA
It is connect with the phase-locked loop circuit, the phase-locked loop circuit is connect with the amplifier, the amplifier and the numerical control attenuation
Device connects；
The control module is used to send control signal to the FPGA and shows the microwave that the microwave frequency source module exports
The real-time status of signal, the control signal include the preset state information of microwave signal, and the status information includes frequency, work(
Rate and waveform；
The constant-temperature crystal oscillator is used to provide reference signal for the FPGA and the phase-locked loop circuit；
The FPGA is used to control the output signal frequency of the phase-locked loop circuit according to the control signal；
The phase-locked loop circuit, the amplifier and the numerical-control attenuator meet the preset state information for adjusting output
Microwave signal.
2. use for laboratory small microwave signal source according to claim 1, which is characterized in that the phase-locked loop circuit includes
Phase discriminator, loop filter, VCO chips, power splitter and frequency divider；
The FPGA is connect with the phase discriminator, and the FPGA is used to be sent to the phase discriminator according to the control signal and control
Signal, the control signal include the preset state information of the microwave signal；
The output end of the phase discriminator is connect with the input terminal of the loop filter, the output end of the loop filter and institute
The input terminal connection of VCO chips is stated, the output end of the VCO chips is connect with the power splitter；
The output all the way of the power splitter connects the input terminal of the frequency divider, the output end of the frequency divider and the phase discriminator
Connection；
The another way output of the power splitter is connect with the input terminal of the amplifier, and the another way of the power splitter exports conduct
The output of the phase-locked loop circuit；
The phase discriminator is used to receive the control signal of FPGA transmissions and the output signal feedback of the frequency divider, compares phase discriminator
Reference signal and the output signal of frequency divider feedback, export analog level signal corresponding with comparison result；
The VCO chips are used for the correspondence according to level and frequency, by the frequency of the output signal of the phase-locked loop circuit
It is adjusted to frequency corresponding with the analog level signal of the loop filter is passed through.
3. use for laboratory small microwave signal source according to claim 1 or 2, which is characterized in that the constant-temperature crystal oscillator is used
In the reference signal for providing 100M for the phase discriminator in the FPGA and the phase-locked loop circuit.
4. use for laboratory small microwave signal source according to claim 1, which is characterized in that the control module is PC
Machine；
The PC machine is connect with the FPGA by RS232 buses.
5. use for laboratory small microwave signal source according to claim 1, which is characterized in that the control module is by monolithic
Machine, LCD screen and keyboard composition；
The microcontroller is separately connected with the LCD screen, the keyboard；
The microcontroller is connect with the FPGA, and the microcontroller is used to send the SPI signal, the SPI to the FPGA
Signal includes the preset state information of microwave signal, and the status information includes frequency, power and waveform.
6. use for laboratory small microwave signal source according to claim 1, which is characterized in that the microwave frequency source module
It further include power module；
The power module is used to be the Microwave Frequency Source module for power supply.
7. use for laboratory small microwave signal source according to claim 1, which is characterized in that the VCO chips are broadband
VCO chips.
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| CN201810860568.9A CN108616275A (en) | 2018-08-01 | 2018-08-01 | A kind of use for laboratory small microwave signal source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537770A (en) * | 2019-12-31 | 2020-08-14 | 天津中兴智联科技有限公司 | Product calibration circuit for replacing signal source equipment |
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| CN205754285U (en) * | 2016-06-17 | 2016-11-30 | 郑州华航科技股份有限公司 | A kind of band Frequency Synthesizers |
| CN206164503U (en) * | 2016-11-22 | 2017-05-10 | 贵州航天计量测试技术研究所 | Low stray microwave frequency synthesizer in miniaturized broadband |
| CN208028869U (en) * | 2018-08-01 | 2018-10-30 | 无锡华测电子系统有限公司 | A kind of use for laboratory small microwave signal source |
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Patent Citations (5)
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| CN105049035A (en) * | 2015-07-16 | 2015-11-11 | 中国电子科技集团公司第四十一研究所 | Multi-mode small low phase noise broadband dot frequency synthetic circuit and method |
| CN205584178U (en) * | 2016-05-11 | 2016-09-14 | 贵州航天计量测试技术研究所 | Realize frequency agility's broadband microwave frequency synthesizer |
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| CN206164503U (en) * | 2016-11-22 | 2017-05-10 | 贵州航天计量测试技术研究所 | Low stray microwave frequency synthesizer in miniaturized broadband |
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| CN111537770A (en) * | 2019-12-31 | 2020-08-14 | 天津中兴智联科技有限公司 | Product calibration circuit for replacing signal source equipment |
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