CN107357352B - A kind of accurate production method of width Power Dynamic Range microwave signal and device - Google Patents
A kind of accurate production method of width Power Dynamic Range microwave signal and device Download PDFInfo
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- CN107357352B CN107357352B CN201710472321.5A CN201710472321A CN107357352B CN 107357352 B CN107357352 B CN 107357352B CN 201710472321 A CN201710472321 A CN 201710472321A CN 107357352 B CN107357352 B CN 107357352B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/02—Digital function generators
- G06F1/03—Digital function generators working, at least partly, by table look-up
- G06F1/0321—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
- G06F1/0328—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers in which the phase increment is adjustable, e.g. by using an adder-accumulator
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- H—ELECTRICITY
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- 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
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- H—ELECTRICITY
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Abstract
The invention discloses a kind of accurate production method of width Power Dynamic Range microwave signal and devices.The microwave signal of wide changed power range can be generated using the present invention, and microwave output power resolution ratio and control accuracy are high.The present invention proposes the microwave signal generation method generated by the fine waveform of the one digit number control attenuator large scale fading control small scale of joint D/A conversion circuits, realize wide Power Dynamic Range, the large scale fixed attenuation of wherein power is realized by numerical-control attenuator, the small fine adjustable attenuation of scale is realized by D/A conversion circuits, and realize that high or low power switches using the open and close of numerical-control attenuator, realize the scenario adjustable attenuation to microwave signal；Meanwhile fine power control stepping is realized using the D/A conversion circuits of high number of significant digit, realize the fine step motion control of high-resolution exported to microwave signal；This invention simplifies design complexities, reduce design cost.
Description
Technical field
The present invention relates to microwave signal analogue technique fields, and in particular to a kind of width Power Dynamic Range microwave signal is accurate
Production method and device.
Background technology
Microwave signal generating device generally there is digital waveform to generate two composition parts of component and up-converter.Number
Waveform generates component with field programmable gate array (FPGA) as core, and main digital signal generates function and realized by FPGA；
Up-converter completes frequency transformation and output power function using frequency converter unit and power control circuit as core.So
And in actual engineering practice, microwave signal generating device realizes that circuit is complicated, and such as in July, 2004 is published in《Electronic technology
Using》In " design of the Multifunction medium-frequency signal source based on DDS " text in, it is proposed that a kind of signal generates control logic electricity
Road, filtering and attenuator circuit, host computer controls FPGA methods by pci bus, but this method realizes that circuit is complicated, design cost
It is high.In addition, in order to enable microwave signal generating device can have a wide output power variation range (being more than 80db), 2016
March is published in《Digital technology and application》In a kind of " Development of Radar IF Simulator " text in, it is proposed that one kind is adopted
With the radar mean frequency analogy method of DDS signal generator combining with digital control attenuator control output power signal variation.This method is adopted
With the cascade mode of multistage numerical-control attenuator, to generate wide output power variation range, but the gain of numerical-control attenuator controls
Error is larger, and multi-stage cascade control error will accumulate, and influence the precision of output power.
Invention content
In view of this, the present invention provides a kind of microwave signal generating method of wide changed power range, width can be generated
The microwave signal of changed power range, and microwave output power resolution ratio and control accuracy are high.
The microwave signal generating method of the wide changed power range of the present invention, first with the significance bit of D/A conversion circuits
Number determines the output power range for meeting power accuracy control and requiring of D/A conversion circuits, if the quasi- scenario for generating microwave signal
Power meets D/A conversion circuits in the output power range that power accuracy control requires, then utilizes D/A conversion circuits that will count
Word baseband signal is converted to the intermediate-freuqncy signal of scenario power, and the microwave signal that intermediate-freuqncy signal generates scenario power through mixing exports；
If not existing, is decayed again to the power of the microwave signal of mixing generation using the numerical-control attenuator of 1 constant power, had
Body, intermediate-freuqncy signal is exported using the difference of microwave signal scenario power and numerical-control attenuator constant power as D/A conversion circuits
Power, intermediate-freuqncy signal carry out power attenuation to microwave signal after mixing generates microwave signal, using numerical-control attenuator, are thought
Determine the microwave signal of power.
Further, using the gain control error of fixed attenuator as systematic error, in the digital baseband that FPGA is generated
It is compensated by signal.
Further, D/A conversions electricity similar in Power Dynamic Range and the microwave signal power variation range of setting is selected
Road.
Further, the output signal power method of determining range for meeting power control accuracy of D/A conversion circuits is such as
Under：
According to the model of selected D/A conversion circuits, the output signal power stepping-in amount Δ p of D/A conversion circuits is：
Wherein, N is the number of significant digit of D/A conversion circuits；B is the quasi- microwave signal amplitude generated, and A is D/A conversion circuits
Full-span output signal amplitude；
Then basis
It is anti-to release the quasi- microwave signal amplitude B generated, then meet PO≥PFSThe output power P of the D/A conversion circuits of-BOIt is
Meet what power accuracy control required, wherein PFSFor the output full range of power of D/A conversion circuits, D/A conversion electricity is thus obtained
The output signal power range for meeting power control accuracy on road.
Further, power control accuracy is met according to the microwave signal power variation range of setting and D/A conversion circuits
Output signal power range, select numerical-control attenuator constant power.
The present invention also provides a kind of microwave signal generation devices of wide changed power range, including host computer, FPGA work(
It can circuit, D/A conversion circuits, low-pass filter, frequency mixer, bandpass filter, phaselocked loop, power splitter, temperature compensating crystal oscillator, frequency multiplication
The numerical-control attenuator of device, clock driver circuit and 1 constant power；Wherein, the model of the D/A conversion circuits is micro- by what is set
Wave signal power variations range determines；The constant power of the numerical-control attenuator is by the quasi- Power Dynamic Range for generating microwave signal
And the signal power dynamic range that the satisfaction control of selected D/A conversion circuits requires determines；
The host computer calculates the adjustable attenuation code for obtaining numerical-control attenuator according to the quasi- scenario power for generating microwave signal
With the output signal power controlling elements of D/A conversion circuits：If the quasi- scenario power for generating microwave signal is in D/A conversion circuits
Meet in the output power range that power accuracy control requires, then the adjustable attenuation code of numerical-control attenuator is 0, controls numerical control attenuation
Device is closed；Otherwise, the adjustable attenuation code of numerical-control attenuator is 1, and control numerical-control attenuator is in open state；
FPGA functional circuits generate digital baseband signal, D/A according to the waveform of the quasi- microwave signal generated with signal amplitude
Conversion circuit carries out Digital Up Convert and digital-to-analogue conversion to the digital baseband signal that FPGA functional circuits export, and according to host computer
The output signal power controlling elements of the D/A conversion circuits of offer obtain the intermediate-freuqncy signal of setting power；
The frequency mixer generates microwave signal after being mixed to intermediate-freuqncy signal；
The numerical-control attenuator generates mixing under the control of the adjustable attenuation code for the numerical-control attenuator that host computer provides
Microwave signal carry out power attenuation.
Advantageous effect：
1) present invention breaches traditional microwave signal generating apparatus to realize that it is multigroup more that wide power output range must use
The cascade bottleneck of digit control attenuator innovatively proposes and is turned by one digit number control attenuator large scale fading control joint D/A
The microwave signal generation method that the fine waveform of the small scale of circuit generates is changed, realizes wide Power Dynamic Range, wherein power is big
Scale fixed attenuation is realized that the small fine adjustable attenuation of scale is realized by D/A conversion circuits, and is declined using numerical control by numerical-control attenuator
Subtract the open and close of device to realize that high or low power switches, realizes the scenario adjustable attenuation to microwave signal；Meanwhile using height
The D/A conversion circuits of number of significant digit realize fine power control stepping, and it is fine to realize the high-resolution exported to microwave signal
Step motion control；
2) design complexities are simplified, design cost is reduced.
Description of the drawings
Fig. 1 is the composition frame chart that wide Power Dynamic Range microwave signal of the present invention accurately generates device；
Fig. 2 is the DAC internal functional block diagrams that wide Power Dynamic Range microwave signal of the present invention accurately generates device；
Fig. 3 is the host computer workflow that wide Power Dynamic Range microwave signal of the present invention accurately generates device
Figure.
Specific implementation mode
The present invention will now be described in detail with reference to the accompanying drawings and examples.
The present invention provides a kind of microwave signal generating methods of wide changed power range, utilize D/A conversion circuits and 1
The combination of numerical-control attenuator, you can generate the microwave signal of broad power band, control circuit is simple, and control accuracy is high.
Specifically, the intermediate-freuqncy signal for meeting precision controlling requirement is obtained the invention firstly uses D/A conversion circuits, in described
Frequency signal generates microwave signal after frequency mixer is mixed, then utilize 1 constant power numerical-control attenuator to microwave signal into
Row decaying, generates the microwave signal of final scenario power.
Wherein, the model of D/A conversion circuits is determined according to fixed microwave signal power dynamic range is proposed, D/A conversion electricity
After the model on road determines, you can according to the output signal power stepping-in amount of D/A conversion circuits, determine D/A conversion circuits can
Meet the output power range of power control accuracy requirement, wherein the output signal power stepping-in amount of D/A conversion circuits is
Wherein, Δ p is the power stepping-in amount that D/A conversion circuits export intermediate-freuqncy signal, that is, Δ p is required to meet power control essence
Degree requires；N is the number of significant digit of D/A conversion circuits；B is the quasi- microwave signal amplitude generated, and A is the full amount of D/A conversion circuits
Journey amplitude output signal.
Then basis
It counter can release the microwave signal amplitude B of quasi- generation, then it is only full in the output power range of D/A conversion circuits
Sufficient PO≥PFSThe output power of-B is to meet power accuracy control simultaneously to require, and accordingly, can obtain D/A conversion circuits satisfaction
The output power range that power control accuracy requires.
Then, the decaying of constant power is realized using 1 numerical-control attenuator, expands output power dynamic range, is generated wide
The microwave signal of power bracket.It wherein, can be in advance to the gain of numerical-control attenuator due to only with 1 numerical-control attenuator
It controls error and carries out experimental calibration, be then compensated by when FPGA generates digital baseband signal, eliminate numerical-control attenuator and bring
Error, improve control accuracy.
Wherein, the constant power of numerical-control attenuator is by Power Dynamic Range, the D/A conversion circuits of the microwave signal for intending generating
Output power range determine.
When generating the microwave signal of scenario power, first determine whether the quasi- power for generating microwave signal is converted in D/A
Within the scope of the output signal power of circuit, if data attenuator does not work, the scenario power of D/A conversion circuits output
Intermediate-freuqncy signal, the intermediate-freuqncy signal through mixing generate scenario power microwave signal after directly export；If quasi- generate microwave letter
Number power be more than D/A conversion circuits generation power bracket, then control D/A conversion circuits output intermediate-freuqncy signal power,
The intermediate-freuqncy signal of D/A conversion circuits output carries out constant power again after mixing generates microwave signal, through microwave signal and decays,
Obtain the microwave signal of final scenario power.
The present invention also provides a kind of microwave signal generating devices of wide changed power range, as shown in Figure 1, including FPGA
Functional circuit, D/A conversion circuits, low-pass filter, frequency mixer, bandpass filter, numerical-control attenuator, phaselocked loop (PLL), work(point
Device, temperature compensating crystal oscillator, frequency multiplier, clock driver circuit, USB controller and host computer；
Wherein, host computer calculates according to the model parameter of the quasi- power for generating microwave signal, D/A conversion circuits and obtains number
The amplitude controlling elements of attenuator control code and D/A conversion circuit output waveforms are controlled, and by above-mentioned parameter through under USB communication interfaces
Issue FPGA functional circuits.
The USB controller for realizing USB communication interfaces between FPGA functional circuits and host computer control.
The FPGA functional circuits generate digital baseband letter according to the waveform of the quasi- microwave signal generated with signal amplitude B
Number, and provided after being controlled the amplitude of digital baseband signal according to the amplitude controlling elements of D/A conversion circuit output waveforms
To 16 bit D/A conversion circuits；Meanwhile the numerical-control attenuator adjustable attenuation code sent according to host computer, control numerical-control attenuator
Open and close.
The D/A conversion circuits generate after carrying out Digital Up Convert, digital-to-analogue conversion to the digital baseband signal that FPGA is provided
Meet the intermediate-freuqncy signal of power control accuracy requirement, and analog if signal is sent to low-pass filter.
The low-pass filter filter out D/A conversion circuits output intermediate-freuqncy signal in image frequency components, and will be filtered in
Frequency signal is sent to frequency mixer.
The temperature compensating crystal oscillator is used to generate the reference frequency benchmark and clock reference of whole device.
The reference frequency signal that temperature compensating crystal oscillator exports is divided into two by the power splitter, is supplied to phaselocked loop (PLL) all the way,
Another way is supplied to frequency multiplier.
The phaselocked loop carries out frequency synthesis to the reference frequency that temperature compensating crystal oscillator provides, and generates the local oscillator letter for mixing
Number.
The frequency mixer is mixed the intermediate-freuqncy signal of local oscillation signal and low-pass filter output that phaselocked loop generates, raw
It is sent to bandpass filter at the microwave signal of scenario wave band, and by microwave signal.
The bandpass filter carries out the microwave signal that frequency mixer exports the inhibition of image frequency signal and local oscillator leakage, and will
Microwave signal after bandpass filtering is sent to numerical-control attenuator.
The numerical-control attenuator is opened and closed under the control of FPGA functional circuits, if quasi- generate microwave signal
Scenario power be located at the output power dynamic ranges of D/A conversion circuits, then numerical-control attenuator is in off state, bandpass filter
The microwave signal of output is final microwave signal, if the quasi- scenario power for generating microwave signal exceeds D/A conversion circuits
Output power dynamic range, then numerical-control attenuator is open state, and the microwave signal of input is fixed in numerical-control attenuator
The decaying of power generates final microwave signal.
The frequency multiplier carries out frequency multiplication to the reference frequency signal that power splitter exports, and obtains the operating clock signals of FPGA,
And it exports to clock driver circuit.
The clock driver circuit carries out shaping driving to the operating clock signals of FPGA.
It is described in detail with reference to specific data：
In conjunction with attached drawing 1, intends the microwave radio signal of generation -86dBm~4dBm, that is, the output of microwave generating device is required to believe
Number power has the Larger Dynamic range of 90dB, and power control accuracy is required to be better than 0.1dB.
Host computer first resolves power contorl parameters, obtains 1 bit adjustable attenuation code (control of numerical-control attenuator
Code is 0 or 1, the open and close for controlling numerical-control attenuator) with the amplitude controlling elements of D/A conversion circuit output waveforms
(output signal power for controlling D/A conversion circuits), and it is handed down to FPGA functional circuits.
Specifically, selecting the significance bit of D/A conversion circuits according to the quasi- Power Dynamic Range for generating microwave signal first
It counts, in the present embodiment, selectes 16 bit D/A conversion circuits, number of significant digit is 14 bits, which theoretically can
The output power range enough realized is -80dBm~4dBm, i.e., output power dynamic model can be theoretically realized by D/A conversion circuits
Enclose the intermediate-freuqncy signal for 84dB.
For the output signal power precision of D/A conversion circuits, due to the output signal power stepping-in amount of D/A conversion circuits
For
Wherein, B is the quasi- signal amplitude for generating microwave signal, and A is the Full-span output signal amplitude of D/A conversion circuits.
It is required that stepping accuracy (i.e. microwave power control accuracy) is within the scope of 0.1dB, then
The microwave signal amplitude B of quasi- generation counter can be released by above formula, then the output power P of D/A conversion circuitsO≥PFS-B
Meet power control accuracy requirement；In the present embodiment, B=45, the output full range of power P of D/A conversion circuitsFSFor 4dBm, i.e.,
Under the conditions of such hardware configuration, D/A conversion circuits may be implemented in -41dBm~4dBm power brackets, power control accuracy is excellent
In the intermediate-freuqncy signal of 0.1dB.
Then, host computer meets according to the Power Dynamic Range and D/A conversion circuits of the quasi- generation microwave signal of setting
Desired signal power dynamic range is controlled, the constant power of numerical-control attenuator is selected；Numerical-control attenuator is chosen in the present embodiment
Constant power be 45dBm, at this point, signal power ranging from -86dBm~-41dBm after numerical-control attenuator is decayed, realize
Microwave signal power dynamic range is the continuity of -86dBm~4dBm.Meanwhile host computer is according to the quasi- work(for generating microwave signal
Rate generates 1 bit adjustable attenuation code of numerical-control attenuator.
After selected good above-mentioned hardware device, host computer calculates according to the quasi- power for generating microwave signal and obtains numerical control attenuation
The amplitude controlling elements of the adjustable attenuation code and D/A conversion circuit output waveforms of device, and it is sent to FPGA functions through USB controller
Circuit.
The USB controller realizes the USB2.0 protocols between host computer and FPGA functional circuits.
Temperature compensating crystal oscillator generate frequency be 60MHz, the reference frequency sinusoidal signal that amplitude is 10dBm.
The 60MHz reference frequency signal work(that temperature compensating crystal oscillator exports is divided into two-way by power splitter, is given phaselocked loop all the way, is given all the way
Frequency multiplier.
Phaselocked loop carries out comprehensive transformation to the 60MHz reference frequency signals that power splitter provides, and produces the upper of 12.96GHz
It is mixed local oscillation signal, and is exported to frequency mixer.
Frequency multiplier carries out quadruple to the 60MHz reference frequency signals that power splitter provides, and produces the FPGA work(of 240MHz
Energy circuit clock benchmark is simultaneously supplied to clock driver circuit.
Clock driver circuit carries out shaping driving to the 240MHz clock signals that frequency multiplier provides, and single-ended signal is converted to
The differential signal of LVPECL level standards.
FPGA functional circuits generate the number that bandwidth is 100MHz according to the waveform of the quasi- microwave signal generated with signal amplitude B
Word baseband signal, and according to the amplitude controlling elements of D/A conversion circuit output waveforms accordingly to 0~50MHz digital baseband signals
Amplitude controlled after be supplied to 16 bit D/A conversion circuits；According to host computer send numerical-control attenuator adjustable attenuation code,
Control the open and close of numerical-control attenuator.
On the one hand D/A conversion circuits receive the 240MHz reference clocks from FPGA functional circuits, quadruple is carried out to it
The D/A conversion circuit work clocks that frequency is 960MHz are generated afterwards；On the other hand receiving the bandwidth from FPGA functional circuits is
The digital baseband signal of 100MHz obtains centre frequency to carrying out Digital Up Convert with the IF carrier of 240MHz after its interpolation
The digital medium-frequency signal for being 100MHz for 240MHz, bandwidth；Later under the control of the work clock of 960MHz, digital intermediate frequency is believed
Number carry out digital-to-analogue conversion, obtain analog if signal.D/A conversion circuit internal functional block diagrams are shown in attached drawing 2.
Low-pass filter carries out low-pass filtering to the analog if signal that D/A conversion circuits export, and effectively inhibits the simulation
The centre frequency for including in intermediate-freuqncy signal is the image frequency signal component of 720MHz.
The analog if signal that frequency mixer is 240MHz to centre frequency, bandwidth is 100MHz carries out uppermixing, is carried
Frequently it is 13.2GHz, the microwave radio signal that bandwidth is 100MHz.
Bandpass filter carries out bandpass filtering to the microwave radio signal of 13.2GHz ± 50MHz, is obtained after filtering out uppermixing
Microwave radio signal in image frequency signal and local oscillator leakage signal.
Constant power be 45dB numerical-control attenuator under the control of FPGA function module, the microwave after bandpass filtering is penetrated
Frequency signal carries out or decays without 45dB, obtains final microwave signal.Wherein, the input intermediate-freuqncy signal work(of numerical-control attenuator
Rate ranging from -41dBm~4dBm, after numerical-control attenuator, it is respectively -86dBm~-41dBm (numerical controls that can obtain power bracket
Attenuator is opened, and carries out the decaying of 45dB again) and -41dBm~4dBm (numerical-control attenuator closings, for the work(of D/A conversion circuits
Rate range) radiofrequency signal, in this way, just can realize the Larger Dynamic range of output microwave radio signal power 90dB, meanwhile, it is capable to
Realize the power control accuracy better than 0.1dB.
The course of work that the microwave signal generates transposition is first to be calibrated to the attenuation of one digit number control attenuator,
Error amount is included in systematic error, and calibration elimination is carried out in host computer.After system electrification, microwave signal generating device enters work
State.The work schedule of microwave signal generating device is FPGA functional circuits after the release of electrification reset state, and generation is shaken hands letter
Number start host computer procedure.The operating process of refer to the attached drawing 3, microwave signal generating device host computer is：
Step 1: after host computer procedure starts, USB controller firmware program is downloaded first, firmware program is to USB controller
Device enumeration is carried out, after enumerating successfully, slave equipment of the USB controller as host computer with host computer into row data communication, and turns
To step 2.
Step 2: setting power contorl parameters by host computer interface, step 3 is gone to.
Step 3: sending reset command to FPGA functional circuits by USB controller, FPGA internal circuits are answered
Position, goes to step 4.
Step 4: host computer reads the parameter being arranged by interface and resolving, the decaying control of 1 bit of numerical-control attenuator is calculated
The amplitude controlling elements of code processed and D/A conversion circuit output waveforms, and under be transmitted to FPGA functional circuits, go to step 5.
Host computer procedure operation is exited in the input Step 5: whether inquiry ceases and desist order if having, if without step is gone to
Two.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (5)
1. a kind of microwave signal generating method of width changed power range, which is characterized in that first with having for D/A conversion circuits
Digit is imitated, determines the output power range for meeting power accuracy control and requiring of D/A conversion circuits, if quasi- generation microwave signal
Scenario power meets D/A conversion circuits in the output power range that power accuracy control requires, then utilizes D/A conversion circuits
Digital baseband signal is converted to the intermediate-freuqncy signal of scenario power, the microwave signal that intermediate-freuqncy signal generates scenario power through mixing is defeated
Go out；If not existing, declined again to the power of the microwave signal of mixing generation using the numerical-control attenuator of 1 constant power
Subtract, specifically, exporting intermediate frequency letter using the difference of microwave signal scenario power and numerical-control attenuator constant power as D/A conversion circuits
Number power, intermediate-freuqncy signal through mixing generate microwave signal after, using numerical-control attenuator to microwave signal carry out power attenuation, obtain
To the microwave signal of scenario power；
Wherein, the output signal power method of determining range for meeting power control accuracy of D/A conversion circuits is as follows：
According to the model of selected D/A conversion circuits, the output signal power stepping-in amount Δ p of D/A conversion circuits is：
Wherein, N is the number of significant digit of D/A conversion circuits；B is the quasi- microwave signal amplitude generated, and A is expiring for D/A conversion circuits
Range amplitude output signal；
Then basis
It is anti-to release the quasi- microwave signal amplitude B generated, then meet PO≥PFSThe output power P of the D/A conversion circuits of-BOIt is to meet
Power accuracy control requires, wherein PFSFor the output full range of power of D/A conversion circuits, D/A conversion circuits are thus obtained
Meet the output signal power range of power control accuracy.
2. the microwave signal generating method of width changed power range as described in claim 1, which is characterized in that by fixed attenuation
The gain control error of device is compensated by as systematic error in the digital baseband signal that FPGA is generated.
3. the microwave signal generating method of width changed power range as described in claim 1, which is characterized in that selection power is dynamic
D/A conversion circuits similar in state range and the microwave signal power variation range of setting.
4. the microwave signal generating method of width changed power range as described in claim 1, which is characterized in that according to setting
Microwave signal power variation range and D/A conversion circuits meet the output signal power range of power control accuracy, select numerical control
The constant power of attenuator.
5. a kind of microwave signal generation device of width changed power range, including host computer, FPGA functional circuits, D/A conversion electricity
Road, low-pass filter, frequency mixer, bandpass filter, phaselocked loop, power splitter, temperature compensating crystal oscillator, frequency multiplier and clock driver circuit,
It is characterized in that, further including the numerical-control attenuator of 1 constant power；Wherein, the model of the D/A conversion circuits is micro- by what is set
Wave signal power variations range determines；The constant power of the numerical-control attenuator is by the quasi- Power Dynamic Range for generating microwave signal
And the signal power dynamic range that the satisfaction control of selected D/A conversion circuits requires determines；
Wherein, the output signal power method of determining range for meeting power control accuracy of D/A conversion circuits is as follows：
According to the model of selected D/A conversion circuits, the output signal power stepping-in amount Δ p of D/A conversion circuits is：
Wherein, N is the number of significant digit of D/A conversion circuits；B is the quasi- microwave signal amplitude generated, and A is expiring for D/A conversion circuits
Range amplitude output signal；
Then basis
It is anti-to release the quasi- microwave signal amplitude B generated, then meet PO≥PFSThe output power P of the D/A conversion circuits of-BOIt is to meet
Power accuracy control requires, wherein PFSFor the output full range of power of D/A conversion circuits, D/A conversion circuits are thus obtained
Meet the output signal power range of power control accuracy；
The host computer calculates the adjustable attenuation code and D/ for obtaining numerical-control attenuator according to the quasi- scenario power for generating microwave signal
The output signal power controlling elements of A conversion circuits：If the quasi- scenario power for generating microwave signal is in the satisfaction of D/A conversion circuits
In the output power range that power accuracy control requires, then the adjustable attenuation code of numerical-control attenuator is 0, is controlled at numerical-control attenuator
In closed state；Otherwise, the adjustable attenuation code of numerical-control attenuator is 1, and control numerical-control attenuator is in open state；
FPGA functional circuits generate digital baseband signal, D/A conversions according to the waveform of the quasi- microwave signal generated with signal amplitude
Circuit carries out Digital Up Convert and digital-to-analogue conversion to the digital baseband signal that FPGA functional circuits export, and is provided according to host computer
D/A conversion circuits output signal power controlling elements, obtain setting power intermediate-freuqncy signal；
The frequency mixer generates microwave signal after being mixed to intermediate-freuqncy signal；
The numerical-control attenuator generates mixing under the control of the adjustable attenuation code for the numerical-control attenuator that host computer provides micro-
Wave signal carries out power attenuation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710472321.5A CN107357352B (en) | 2017-06-21 | 2017-06-21 | A kind of accurate production method of width Power Dynamic Range microwave signal and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710472321.5A CN107357352B (en) | 2017-06-21 | 2017-06-21 | A kind of accurate production method of width Power Dynamic Range microwave signal and device |
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| CN201114040Y (en) * | 2007-09-07 | 2008-09-10 | 西安达威通信设备有限公司 | Radio frequency power open-loop control device |
| CN105375922A (en) * | 2015-12-04 | 2016-03-02 | 兰州空间技术物理研究所 | Microwave signal source used for miniature atomic clock |
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| US20090004981A1 (en) * | 2007-06-27 | 2009-01-01 | Texas Instruments Incorporated | High efficiency digital transmitter incorporating switching power supply and linear power amplifier |
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| CN201114040Y (en) * | 2007-09-07 | 2008-09-10 | 西安达威通信设备有限公司 | Radio frequency power open-loop control device |
| CN105375922A (en) * | 2015-12-04 | 2016-03-02 | 兰州空间技术物理研究所 | Microwave signal source used for miniature atomic clock |
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