CN208028869U - 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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- CN208028869U CN208028869U CN201821228478.XU CN201821228478U CN208028869U CN 208028869 U CN208028869 U CN 208028869U CN 201821228478 U CN201821228478 U CN 201821228478U CN 208028869 U CN208028869 U CN 208028869U
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Abstract
The utility model 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 utility model embodiment is related 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.
Utility model content
In order to solve problems in the prior art, the utility model embodiment provides a kind of use for laboratory small microwave signal
Source.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 with
Phase-locked loop circuit connects, and phase-locked loop circuit is connect with amplifier, and amplifier is connect with numerical-control attenuator, the numerical-control attenuator
Output end is the output end of the microwave frequency source module；
The constant-temperature crystal oscillator is connect with the phase-locked loop circuit；
The control module is connect with the FPGA.
Optionally, phase-locked loop circuit includes phase discriminator, loop filter, VCO chips, power splitter and frequency divider；
FPGA is connect with phase discriminator；
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.
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.
Optionally, microwave frequency source module further includes power module；
Power module is connect with microwave frequency source module.
Optionally, VCO chips are broadband VCO chips.
The advantageous effect brought of technical solution that the utility model embodiment provides 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
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
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
It is new to this practicality below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
Referring to FIG. 1, it illustrates the use for laboratory small microwave signal sources of the utility model one embodiment offer
Structural 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 with
Phase-locked 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
End is the output end of microwave frequency source module, and the output signal of numerical-control attenuator is the microwave of the laboratory room small-sized microwave signal source
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 connect with phase-locked loop circuit, and control module is connect with FPGA.
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, different VCO chips tool after entering loop filter
There are different level and the correspondence of 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 is connect with microwave frequency source module, power supply
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.
The use for laboratory small microwave signal source that the utility model embodiment provides occupies little space, and volume is no more than
100mm*100mm*30mm, weight is no more than 1kg, portable.
The output signal for the use for laboratory small microwave signal source that the utility model embodiment provides can reach working band
For 8-16GHz, stepping 100kHz, output power is -11dBm~20dBm, stepping 1dB.If desired finer frequency steps are realized
Into and power stepping, the program in FPGA can be adjusted according to actual needs.
The use for laboratory small microwave signal source that the utility model embodiment provides, can be by replacing different frequency range
VCO, and control program realize the microwave signal of output 0-8GHz or 16GHz or more.
The use for laboratory small microwave signal source that the utility model embodiment provides passes through broadband p LL circuits, output letter
More than -70dBc, phase of output signal noise can reach -80dBc/Hz@100Hz, -90dBc/Hz@1kHz for number spuious control.
In one example, FPGA selects the EP3C25E144C8N elements of ALTERA companies, corresponding configuration EPROM
Select the EPCS16SI8 elements of ALTERA companies；Phase discriminator selects the HMC703LP4E elements of HITTITE companies；VCO chips
Product in selection customized in electricity 13, customizes appropriate bandwidth according to actual needs；Power splitter is selected micro- according to actual demand emulation
Element with power splitter or the suitable frequency range of selection；Frequency divider selects the ADF5000BCPZ elements of ADI companies；Amplifier and number
Control attenuator can select the commercial elements of suitable frequency range according to actual use demand.
In one example, in power module+15V voltage stabilizings+12V element use ON companies LM2941S；+12V/+
The element of 15V voltage stabilizings+5V uses the MIC29300-5.0BU of MICREL companies；The element of+5V voltage stabilizings+3.3V is public using ALPHA
The AS1117M3-3.3 of department；The element of+5V voltage stabilizings+2.5V uses the AS1117M3-2.5 of ALPHA companies；+ 5V voltage stabilizings+1.2V's
Element uses the AMS1117-1.2 of ALPHA companies.
It should be noted that the specific connection type between each element can be determined according to the operation instruction of element, this
In repeat no more.
It should be noted that：Above-mentioned the utility model embodiment serial number is 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 above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
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 is connect with the phase-locked loop circuit, and the phase-locked loop circuit is connect with the amplifier, the amplifier with
The numerical-control attenuator connection, the output end of the numerical-control attenuator are the output end of the microwave frequency source module；
The constant-temperature crystal oscillator is connect with the phase-locked loop circuit；
The control module is connect with the FPGA.
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；
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.
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
Phase discriminator in the FPGA and the phase-locked loop circuit provides the reference signal of 100M.
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.
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 connect with the microwave frequency source module.
7. use for laboratory small microwave signal source according to claim 2, which is characterized in that the VCO chips are broadband
VCO chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228478.XU CN208028869U (en) | 2018-08-01 | 2018-08-01 | A kind of use for laboratory small microwave signal source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228478.XU CN208028869U (en) | 2018-08-01 | 2018-08-01 | A kind of use for laboratory small microwave signal source |
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| Publication Number | Publication Date |
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| CN208028869U true CN208028869U (en) | 2018-10-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108616275A (en) * | 2018-08-01 | 2018-10-02 | 无锡华测电子系统有限公司 | A kind of use for laboratory small microwave signal source |
| CN113645728A (en) * | 2021-05-24 | 2021-11-12 | 中国电子科技集团公司第十三研究所 | Microwave generator of phase control system and frequency source chip thereof |
-
2018
- 2018-08-01 CN CN201821228478.XU patent/CN208028869U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108616275A (en) * | 2018-08-01 | 2018-10-02 | 无锡华测电子系统有限公司 | A kind of use for laboratory small microwave signal source |
| CN113645728A (en) * | 2021-05-24 | 2021-11-12 | 中国电子科技集团公司第十三研究所 | Microwave generator of phase control system and frequency source chip thereof |
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