CN107357352A - A kind of accurate production method of wide Power Dynamic Range microwave signal and device - Google Patents
A kind of accurate production method of wide Power Dynamic Range microwave signal and device Download PDFInfo
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- CN107357352A CN107357352A CN201710472321.5A CN201710472321A CN107357352A CN 107357352 A CN107357352 A CN 107357352A CN 201710472321 A CN201710472321 A CN 201710472321A CN 107357352 A CN107357352 A CN 107357352A
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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
- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
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Abstract
The invention discloses a kind of accurate production method of wide Power Dynamic Range microwave signal and device.The microwave signal of wide changed power scope can be produced using the present invention, and microwave output power resolution ratio and control accuracy are high.The present invention proposes the microwave signal generation method as caused by the one digit number control attenuator large scale fading control small yardstick of joint D/A change-over circuits fine waveform, 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 yardstick is realized by D/A change-over 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 change-over circuits of high number of significant digit, realize the fine step motion control of high-resolution to microwave signal output；This invention simplifies design complexities, reduce design cost.
Description
Technical field
The present invention relates to microwave signal analogue technique field, and in particular to a kind of wide Power Dynamic Range microwave signal is accurate
Production method and device.
Background technology
Typically there is microwave signal generating device digital waveform to produce two composition parts of component and up-converter.Numeral
Waveform produces component with field programmable gate array (FPGA) as core, and main data signal produces 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 the engineering practice of reality, microwave signal generating device realizes circuit complexity, is published in such as in July, 2004《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 produces control logic electricity
Road, filtering and attenuator circuit, host computer controls FPGA methods by pci bus, but this method realizes circuit complexity, design cost
It is high.In addition, in order that microwave signal generating device can have a wide power output excursion (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
The radar mean frequency analogy method changed with DDS signal generator combining with digital control attenuator control signal power output.This method is adopted
The mode cascaded with multistage numerical-control attenuator, to produce wide power output excursion, but the gain control of numerical-control attenuator
Error is larger, and multi-stage cascade control error will accumulate, and have influence on the precision of power output.
The content of the invention
In view of this, the invention provides a kind of microwave signal generating method of wide changed power scope, width can be produced
The microwave signal of changed power scope, and microwave output power resolution ratio and control accuracy are high.
The microwave signal generating method of the wide changed power scope of the present invention, first with the significance bit of D/A change-over circuits
Number, the output power range for meeting power accuracy control and requiring of D/A change-over circuits is determined, if intending the scenario of generation microwave signal
Power is in the output power range for meeting power accuracy control and requiring of D/A change-over circuits, then using D/A change-over circuits by number
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, the power of the microwave signal of mixing generation is decayed again 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 change-over circuits
Power, intermediate-freuqncy signal carry out power attenuation to microwave signal after mixing generates microwave signal, using numerical-control attenuator, thought
Determine the microwave signal of power.
Further, using the gain control error of fixed attenuator as systematic error, in the digital baseband of FPGA generations
It is compensated by signal.
Further, Power Dynamic Range and D/A conversions electricity similar in the microwave signal power excursion of setting are selected
Road.
Further, the output signal power method of determining range for meeting power control accuracy of D/A change-over circuits is such as
Under：
According to the model of selected D/A change-over circuits, the output signal power stepping-in amount Δ p of D/A change-over circuits is：
Wherein, N is the number of significant digit of D/A change-over circuits；B is the microwave signal amplitude for intending generation, and A is D/A change-over circuits
Full-span output signal amplitude；
Then basis
It is anti-to release the microwave signal amplitude B for intending generation, then meet PO≥PFSThe power output P of-B D/A change-over circuitsOIt is
Meet what power accuracy control required, wherein, PFSFor the output full range of power of D/A change-over circuits, D/A conversion electricity is thus obtained
The output signal power scope for meeting power control accuracy on road.
Further, power control accuracy is met according to the microwave signal power excursion of setting and D/A change-over circuits
Output signal power scope, select numerical-control attenuator constant power.
Present invention also offers a kind of microwave signal generation device of wide changed power scope, including host computer, FPGA work(
Can circuit, D/A change-over 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 change-over circuits is micro- by what is set
Ripple signal power variations scope determines；The constant power of the numerical-control attenuator is generated the Power Dynamic Range of microwave signal by plan
And the signal power dynamic range that the satisfaction control of selected D/A change-over circuits requires determines；
The host computer calculates the adjustable attenuation code for obtaining numerical-control attenuator according to the scenario power for intending generating microwave signal
With the output signal power controlling elements of D/A change-over circuits：If intend the scenario power of generation microwave signal in D/A change-over 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 opening；
FPGA functional circuits produce digital baseband signal, D/A according to the waveform for the microwave signal for intending generation with signal amplitude
The digital baseband signal that change-over circuit exports to FPGA functional circuits carries out Digital Up Convert and digital-to-analogue conversion, and according to host computer
The output signal power controlling elements of the D/A change-over circuits of offer, obtain setting the intermediate-freuqncy signal of power；
The frequency mixer generates microwave signal after being mixed to intermediate-freuqncy signal；
The numerical-control attenuator generates under the control of the adjustable attenuation code for the numerical-control attenuator that host computer provides to mixing
Microwave signal carry out power attenuation.
Beneficial effect：
1) present invention breaches traditional microwave signal generating apparatus to realize that it is multigroup more that wide power output scope must use
The bottleneck of digit control attenuator cascade, innovatively propose and turned by one digit number control attenuator large scale fading control joint D/A
Microwave signal generation method caused by changing the fine waveform of the small yardstick of circuit, realizes wide Power Dynamic Range, and wherein power is big
Yardstick fixed attenuation is realized that the small fine adjustable attenuation of yardstick is realized by D/A change-over 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, realize the scenario adjustable attenuation to microwave signal；Meanwhile using height
The D/A change-over circuits of number of significant digit realize fine Power Control stepping, realize fine to the high-resolution of microwave signal output
Step motion control；
2) design complexities are simplified, reduce design cost.
Brief 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 built-in function 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.
Embodiment
The present invention will now be described in detail with reference to the accompanying drawings and examples.
The invention provides a kind of microwave signal generating method of wide changed power scope, D/A change-over circuits and 1 are utilized
The combination of numerical-control attenuator, you can produce the microwave signal of broad power band, control circuit is simple, and control accuracy is high.
Specifically, the present invention obtains the intermediate-freuqncy signal for meeting precision controlling requirement first with D/A change-over circuits, in described
Frequency signal generates microwave signal after frequency mixer is mixed, and then microwave signal is entered using the numerical-control attenuator of 1 constant power
Row decay, generate the microwave signal of final scenario power.
Wherein, the model of D/A change-over circuits determines 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 change-over circuits, determine D/A change-over circuits can
Meet the output power range of power control accuracy requirement, wherein, the output signal power stepping-in amount of D/A change-over circuits is
Wherein, Δ p is the power stepping-in amount that D/A change-over circuits export intermediate-freuqncy signal, that is, requires that Δ p meets Power Control essence
Degree requires；N is the number of significant digit of D/A change-over circuits；B is the microwave signal amplitude for intending generation, and A is the full amount of D/A change-over circuits
Journey amplitude output signal.
Then basis
It counter can release the microwave signal amplitude B for intending generation, then it is only full in the output power range of D/A change-over circuits
Sufficient PO≥PFS- B power output is to meet that power accuracy control requires simultaneously, accordingly, can obtain D/A change-over circuits satisfaction
The output power range of power control accuracy requirement.
Then, the decay of constant power is realized using 1 numerical-control attenuator, expands power output dynamic range, generation is wide
The microwave signal of power bracket.Wherein, due to only with 1 numerical-control attenuator, gain that can in advance to numerical-control attenuator
Control error to carry out experimental calibration, be then compensated by when FPGA produces 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 change-over circuits of the microwave signal for intending generating
Output power range determine.
When producing the microwave signal of scenario power, first determine whether the power for intending generation microwave signal is changed in D/A
In the range of the output signal power of circuit, if, data attenuator does not work, D/A change-over circuits output scenario power
Intermediate-freuqncy signal, the intermediate-freuqncy signal through mixing generation scenario power microwave signal after directly export；If intend generation microwave letter
Number power exceeded the generation power brackets of D/A change-over circuits, then control the power of D/A change-over circuits output intermediate-freuqncy signal,
The intermediate-freuqncy signal of D/A change-over circuits output carries out constant power again after mixing generates microwave signal, through microwave signal and decayed,
Obtain the microwave signal of final scenario power.
Present invention also offers a kind of microwave signal generating device of wide changed power scope, as shown in figure 1, including FPGA
Functional circuit, D/A change-over 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 power of plan generation microwave signal, the model parameter of D/A change-over circuits and obtains number
The amplitude controlling elements of attenuator control code and D/A change-over circuit output waveforms are controlled, and by above-mentioned parameter through under USB communication interfaces
Issue FPGA functional circuits.
The USB controller is used for the control for realizing USB communication interfaces between FPGA functional circuits and host computer.
The FPGA functional circuits produce digital baseband letter according to the waveform for the microwave signal for intending generation with signal amplitude B
Number, and provided after being controlled according to the amplitude controlling elements of D/A change-over circuit output waveforms to the amplitude of digital baseband signal
To 16 bit D/A change-over circuits；Meanwhile the numerical-control attenuator adjustable attenuation code sent according to host computer, control numerical-control attenuator
Open and close.
The digital baseband signal that the D/A change-over circuits are provided FPGA generates after carrying out Digital Up Convert, digital-to-analogue conversion
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 change-over 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 for the reference frequency benchmark and clock reference for producing 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 reference frequency that the phaselocked loop is provided temperature compensating crystal oscillator carries out frequency synthesis, produces the local oscillator letter for mixing
Number.
The intermediate-freuqncy signal that the frequency mixer exports to local oscillation signal caused by phaselocked loop and low pass filter is mixed, raw
Sent into the microwave signal of scenario wave band, and by microwave signal to bandpass filter.
The microwave signal that the bandpass filter exports to frequency mixer carries out the suppression 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 intending generation microwave signal
Scenario power be located at the power output dynamic ranges of D/A change-over circuits, then numerical-control attenuator is closed mode, bandpass filter
The microwave signal of output is final microwave signal, if the scenario power for intending generation microwave signal exceeds D/A change-over circuits
Power output dynamic range, then numerical-control attenuator is opening, and the microwave signal of input is fixed numerical-control attenuator
The decay of power, generate final microwave signal.
The reference frequency signal that the frequency multiplier exports to power splitter carries out frequency multiplication, obtains FPGA operating clock signals,
And export to clock driver circuit.
The clock driver circuit carries out shaping driving to FPGA operating clock signals.
It is described in detail with reference to specific data：
With reference to accompanying drawing 1, intend generation -86dBm~4dBm microwave radio signal, that is, require that the output of microwave generating device is believed
Number power has 90dB Larger Dynamic scope, and requires that power control accuracy is better than 0.1dB.
Host computer resolves to power contorl parameters first, obtains the bit adjustable attenuation code (control of numerical-control attenuator 1
Code is 0 or 1, for controlling the open and close of numerical-control attenuator) with the amplitude controlling elements of D/A change-over circuit output waveforms
(being used for the output signal power for controlling D/A change-over circuits), and it is handed down to FPGA functional circuits.
Specifically, first according to the Power Dynamic Range for intending generating microwave signal, the significance bit of selected D/A change-over circuits
Count, in the present embodiment, select 16 bit D/A change-over circuits, its number of significant digit is 14 bits, and the D/A change-over circuits in theory can
The output power range enough realized is -80dBm~4dBm, i.e., can realize power output dynamic model in theory by D/A change-over circuits
Enclose the intermediate-freuqncy signal for 84dB.
For the output signal power precision of D/A change-over circuits, due to the output signal power stepping-in amount of D/A change-over circuits
For
Wherein, B is the signal amplitude for intending generation microwave signal, and A is the Full-span output signal amplitude of D/A change-over circuits.
It is required that stepping accuracy (i.e. microwave power control accuracy) is in the range of 0.1dB, then
The microwave signal amplitude B, then D/A change-over circuits that intend generation power output P counter can be released by above formulaO≥PFS-B
Meet power control accuracy requirement；In the present embodiment, B=45, the output full range of power P of D/A change-over circuitsFSFor 4dBm, i.e.,
Under the conditions of such a hardware configuration, D/A change-over circuits can be realized in -41dBm~4dBm power brackets, power control accuracy is excellent
In 0.1dB intermediate-freuqncy signal.
Then, host computer generates the Power Dynamic Range of microwave signal according to the plan of setting and D/A change-over circuits meet
Desired signal power dynamic range is controlled, selectes the constant power of numerical-control attenuator；Numerical-control attenuator is chosen in the present embodiment
Constant power be 45dBm, now, the signal power scope after numerical-control attenuator is decayed is -86dBm~-41dBm, realize
Microwave signal power dynamic range is -86dBm~4dBm continuity.Meanwhile host computer is according to the work(for intending generating microwave signal
Rate generates the bit adjustable attenuation code of numerical-control attenuator 1.
After selected good above-mentioned hardware device, host computer calculates according to the power for intending generating microwave signal and obtains numerical control attenuation
The adjustable attenuation code of device and the amplitude controlling elements of D/A change-over circuit output waveforms, and sent through USB controller to FPGA functions
Circuit.
The USB controller realizes the USB2.0 protocols between host computer and FPGA functional circuits.
Temperature compensating crystal oscillator generation frequency is 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, all the way to phaselocked loop, is given all the way
Frequency multiplier.
Phaselocked loop carries out integrating conversion to the 60MHz reference frequency signals that power splitter provides, and produces the upper of 12.96GHz
Local oscillation signal is mixed, and is exported to frequency mixer.
The 60MHz reference frequency signals that frequency multiplier is provided power splitter carry out quadruple, produce 240MHz FPGA work(
Energy circuit clock benchmark is simultaneously supplied to clock driver circuit.
The 240MHz clock signals that clock driver circuit is provided frequency multiplier carry out shaping driving, and single-ended signal is converted to
The differential signal of LVPECL level standards.
FPGA functional circuits produce the number with a width of 100MHz according to the waveform for the microwave signal for intending generation with signal amplitude B
Word baseband signal, and according to the amplitude controlling elements of D/A change-over circuit output waveforms accordingly to 0~50MHz digital baseband signals
Amplitude be controlled after be supplied to 16 bit D/A change-over circuits；The numerical-control attenuator adjustable attenuation code sent according to host computer,
Control the open and close of numerical-control attenuator.
On the one hand D/A change-over circuits receive the 240MHz reference clocks from FPGA functional circuits, quadruple is carried out to it
The D/A change-over circuit work clocks that frequency is 960MHz are produced afterwards；On the other hand it is a width of to receive the band from FPGA functional circuits
100MHz digital baseband signal, Digital Up Convert is carried out to the IF carrier after its interpolation with 240MHz, obtains centre frequency
Digital medium-frequency signal for 240MHz, with a width of 100MHz；Afterwards under 960MHz work clock control, digital intermediate frequency is believed
Number carry out digital-to-analogue conversion, obtain analog if signal.D/A change-over circuit built-in function block diagrams are shown in accompanying drawing 2.
The analog if signal that low pass filter exports to D/A change-over circuits carries out LPF, effectively suppresses the simulation
The centre frequency included in intermediate-freuqncy signal is 720MHz image frequency signal component.
Frequency mixer is 240MHz to centre frequency, the analog if signal with a width of 100MHz carries out uppermixing, is carried
Frequency is 13.2GHz, the microwave radio signal with a width of 100MHz.
Bandpass filter carries out bandpass filtering to 13.2GHz ± 50MHz microwave radio signal, 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 is carried out or decayed without 45dB, obtains final microwave signal.Wherein, the input intermediate-freuqncy signal work(of numerical-control attenuator
Rate scope is -41dBm~4dBm, and after numerical-control attenuator, it is respectively -86dBm~-41dBm (numerical controls that can obtain power bracket
Attenuator is opened, and carries out 45dB decay again) and -41dBm~4dBm (numerical-control attenuator closings, for the work(of D/A change-over circuits
Rate scope) radiofrequency signal, in this way, output microwave radio signal power 90dB Larger Dynamic scope just can be realized, meanwhile, it is capable to
Realize the power control accuracy better than 0.1dB.
The course of work of the microwave signal generation transposition is that first the attenuation of one digit number control attenuator is calibrated,
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.Refer to the attached drawing 3, the operating process of microwave signal generating device host computer are：
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 unit of the USB controller as host computer, enters row data communication with host computer, and turn
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 set by interface and resolving, the decay control of the bit of numerical-control attenuator 1 is calculated
The amplitude controlling elements of code processed and D/A change-over circuit output waveforms, and under be transmitted to FPGA functional circuits, go to step 5.
The input Step 5: whether inquiry ceases and desist order, host computer procedure operation is exited if having, step is gone to if nothing
Two.
In summary, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention's
Within protection domain.
Claims (6)
1. a kind of microwave signal generating method of wide changed power scope, it is characterised in that first with having for D/A change-over circuits
Digit is imitated, the output power range for meeting power accuracy control and requiring of D/A change-over circuits is determined, if intending generation microwave signal
Scenario power then utilizes D/A change-over circuits in the output power range for meeting power accuracy control and requiring of D/A change-over 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, the power of the microwave signal of mixing generation is declined again 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 change-over 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.
2. the microwave signal generating method of wide changed power scope as claimed in claim 1, it is characterised in that by fixed attenuation
The gain control error of device is compensated by as systematic error in the digital baseband signal of FPGA generations.
3. the microwave signal generating method of wide changed power scope as claimed in claim 1, it is characterised in that selection power moves
State scope and D/A change-over circuits similar in the microwave signal power excursion of setting.
4. the microwave signal generating method of wide changed power scope as claimed in claim 1, it is characterised in that D/A conversion electricity
The output signal power method of determining range for meeting power control accuracy on road is as follows：
According to the model of selected D/A change-over circuits, the output signal power stepping-in amount Δ p of D/A change-over circuits is：
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<mi>&Delta;</mi>
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<mi>B</mi>
<mo>+</mo>
<mfrac>
<mi>A</mi>
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<mi>N</mi>
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Wherein, N is the number of significant digit of D/A change-over circuits；B is the microwave signal amplitude for intending generation, and A is expiring for D/A change-over circuits
Range amplitude output signal；
Then basis
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<mi>&Delta;</mi>
<mi>p</mi>
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<mi>B</mi>
<mo>+</mo>
<mfrac>
<mi>A</mi>
<msup>
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<mi>N</mi>
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</mfrac>
</mrow>
<mi>B</mi>
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</mrow>
It is anti-to release the microwave signal amplitude B for intending generation, then meet PO≥PFSThe power output P of-B D/A change-over circuitsOIt is to meet
Power accuracy control requirement, wherein, PFSFor the output full range of power of D/A change-over circuits, D/A change-over circuits are thus obtained
Meet the output signal power scope of power control accuracy.
5. the microwave signal generating method of wide changed power scope as claimed in claim 1, it is characterised in that according to setting
Microwave signal power excursion and D/A change-over circuits meet the output signal power scope of power control accuracy, select numerical control
The constant power of attenuator.
6. a kind of microwave signal generation device of wide changed power scope, 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,
Characterized in that, also include the numerical-control attenuator of 1 constant power；Wherein, the model of the D/A change-over circuits is micro- by what is set
Ripple signal power variations scope determines；The constant power of the numerical-control attenuator is generated the Power Dynamic Range of microwave signal by plan
And the signal power dynamic range that the satisfaction control of selected D/A change-over circuits requires determines；
The host computer calculates the adjustable attenuation code and D/ for obtaining numerical-control attenuator according to the scenario power for intending generating microwave signal
The output signal power controlling elements of A change-over circuits：If intend satisfaction of the scenario power in D/A change-over circuits of generation microwave signal
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 mode；Otherwise, the adjustable attenuation code of numerical-control attenuator is 1, and control numerical-control attenuator is in opening；
FPGA functional circuits produce digital baseband signal, D/A conversions according to the waveform for the microwave signal for intending generation with signal amplitude
The digital baseband signal that circuit exports to FPGA functional circuits carries out Digital Up Convert and digital-to-analogue conversion, and is provided according to host computer
D/A change-over circuits output signal power controlling elements, obtain set power intermediate-freuqncy signal；
The frequency mixer generates microwave signal after being mixed to intermediate-freuqncy signal；
The numerical-control attenuator is under the control of the adjustable attenuation code for the numerical-control attenuator that host computer provides to the micro- of mixing generation
Ripple signal carries out power attenuation.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009438A (en) * | 2021-05-25 | 2021-06-22 | 成都雷通科技有限公司 | Emission type radio frequency injection type broadband multi-target simulator |
| CN113625310A (en) * | 2021-06-18 | 2021-11-09 | 西安空间无线电技术研究所 | Method and system for dynamically simulating amplitude and frequency of orthogonal signal with high linearity in large range |
| WO2023165322A1 (en) * | 2022-03-03 | 2023-09-07 | 阿里巴巴达摩院(杭州)科技有限公司 | Signal processing methods and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US20090004981A1 (en) * | 2007-06-27 | 2009-01-01 | Texas Instruments Incorporated | High efficiency digital transmitter incorporating switching power supply and linear power amplifier |
| 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 |
-
2017
- 2017-06-21 CN CN201710472321.5A patent/CN107357352B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090004981A1 (en) * | 2007-06-27 | 2009-01-01 | Texas Instruments Incorporated | High efficiency digital transmitter incorporating switching power supply and linear power amplifier |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009438A (en) * | 2021-05-25 | 2021-06-22 | 成都雷通科技有限公司 | Emission type radio frequency injection type broadband multi-target simulator |
| CN113625310A (en) * | 2021-06-18 | 2021-11-09 | 西安空间无线电技术研究所 | Method and system for dynamically simulating amplitude and frequency of orthogonal signal with high linearity in large range |
| CN113625310B (en) * | 2021-06-18 | 2023-08-29 | 西安空间无线电技术研究所 | Large-range high-linearity orthogonal signal amplitude-frequency dynamic simulation method and simulation system |
| WO2023165322A1 (en) * | 2022-03-03 | 2023-09-07 | 阿里巴巴达摩院(杭州)科技有限公司 | Signal processing methods and storage medium |
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