CN106506003A - A kind of microwave signal synthesizer - Google Patents
A kind of microwave signal synthesizer Download PDFInfo
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- CN106506003A CN106506003A CN201610851767.4A CN201610851767A CN106506003A CN 106506003 A CN106506003 A CN 106506003A CN 201610851767 A CN201610851767 A CN 201610851767A CN 106506003 A CN106506003 A CN 106506003A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 229910052701 rubidium Inorganic materials 0.000 abstract description 14
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 238000004590 computer program Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
-
- 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
- H03L7/26—Automatic control of frequency or phase; Synchronisation using energy levels of molecules, atoms, or subatomic particles as a frequency reference
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention discloses a kind of microwave signal synthesizer, including Direct Digital Frequency Synthesizers, I/Q manipulators, phase-locked loop circuit, loop filter, voltage controlled oscillator；The microwave signal synthesizer receives input reference signal, produces microwave output signal；The Direct Digital Frequency Synthesizers produce first frequency signal；The voltage controlled oscillator produces the microwave output signal；The I/Q manipulators carry out mixing and produce second frequency signal to the first frequency signal and the microwave output signal；The phase-locked loop circuit includes the first converter, phase discriminator, compares for the second frequency signal frequency conversion and the input reference signal are entered line frequency；The loop filter produces voltage controlled oscillator adjustment signal.The present invention solves the problems, such as that traditional microwave signal synthetic apparatus debugging complexity, temperature characterisitic are poor for small-sized rubidium atomic frequency standard, its small volume, exempt from debugging, good temp characteristic, mutually make an uproar good with spurious performance.
Description
Technical field
The present invention relates to field of microwave communication, more particularly to a kind of microwave signal synthesizer,
Background technology
Small-sized rubidium atomic frequency standard is high because of small volume, reliability, is widely applied in national defence, industry.Setting
When meter is with small-sized rubidium atomic frequency standard is manufactured, the volume and performance of its 6.8GHz microwave signal source are to determine machine volume and property
One of key factor of energy.
In general, the microwave signal frequency that wants needed for the quantum part of rubidium atomic frequency standard is
6.8346875GHz, needs to carry out specific frequency synthesis process just complete frequency transformation.Rubidium atomic frequency standard is to microwave
The purity of frequency spectrum of signal frequency, phase noise and power have strict demand, particularly small-sized rubidium atomic clock temperature limit
Wider, -40 DEG C～+60 DEG C scopes are can be usually reached, this requires that the microwave signal combiner circuit in rubidium atomic frequency standard exists
On the premise of ensureing small volume, low cost, Low phase noise, low spurious, have good output power stability.
The usual way of microwave signal synthesis is using 10MHz crystal oscillators, and this signal is wrapped after 684 frequencys multiplication
Comb spectrum containing 6.84GHz, is mixed with the 5.3125MHz signals for equally being synthesized by 10MHz, is finally given
6.8346875GHz signal.This scheme can obtain good phase noise, but because using transistor frequency multiplier and step frequency multiplication
Device, so power stability is poor, the purity of frequency spectrum is poor, circuit is complicated, debugging work load is big.
Another kind of way is exactly the crystal oscillator using non-standard frequencies, and its direct frequency doubling is arrived
6.8346875GHz.This scheme due to eliminating mixing link, preferably, but still can not keep away by the microwave signal purity of frequency spectrum for obtaining
Exempt from a large number using doubler, complex structure and temperature characterisitic is poor.
Content of the invention
It is an object of the invention to provide a kind of microwave signal synthesizer, it is former that the microwave signal of generation can be used for small-sized rubidium
Sub- frequency standard, solves the problems, such as that traditional microwave signal synthetic apparatus debugging complexity, temperature characterisitic are poor.
A kind of microwave signal synthesizer provided in an embodiment of the present invention, including with lower component：Direct digital synthesis technique
Device, I/Q manipulators, phase-locked loop circuit, loop filter, voltage controlled oscillator；The microwave signal synthesizer receives input ginseng
Signal is examined, microwave output signal is produced；The Direct Digital Frequency Synthesizers are used for producing first frequency signal；Described voltage-controlled shake
Swinging device is used for producing the microwave output signal；The I/Q manipulators are used for defeated to the first frequency signal and the microwave
Go out signal to be mixed, produce second frequency signal；The phase-locked loop circuit includes the first converter, phase discriminator；Described first
Converter is used for the second frequency signal frequency conversion；The phase discriminator is used for the output signal of first converter and institute
State input reference signal and enter line frequency and compare, export phase difference signal；The loop filter is used for being input into the phase difference signal, produces
Raw voltage controlled oscillator adjustment signal.
As the embodiment that microwave signal synthesizer of the present invention further optimizes, also include the second converter；Described
Two converters, for changing the frequency of the input reference signal, produce the 3rd frequency signal；3rd frequency signal is used for
It is input into the Direct Digital Frequency Synthesizers.The optimal input signal of corresponding Direct Digital Frequency Synthesizers of the present invention, institute
State that the 3rd frequency is the first frequency more than 2.5 times.
As highly preferred embodiment of the present invention, the second frequency be the mid frequency of the microwave output signal with described
The sum of first frequency；The mid frequency of the microwave output signal is 6.8346875GHz, the first frequency is
5.3125MHz.
Or, the second frequency is the difference of the mid frequency with the first frequency of the microwave output signal；Described
The mid frequency of microwave output signal is 6.8346875GHz；The first frequency is 4.6875MHz.
As the embodiment that further optimizes of the present invention, the second frequency be the input reference signal frequency times
Number；First converter is divided to the second frequency signal, is made the output of first converter by the multiple
Signal frequency is identical with the frequency of the input reference signal.
In all embodiments of the invention, the frequency of the input reference signal can be adopted for 10MHz.
The present invention has the beneficial effect that：
Its small volume, exempt from debugging, good temp characteristic, mutually make an uproar good with spurious performance, be particularly well-suited to small-sized rubidium atomic frequency
Standard.Had the advantage that based on this scheme synthesis microwave signal：All main body devices are small size integrated chip, and circuit is whole
Body volume very little；Using PHASE-LOCKED LOOP PLL TECHNIQUE, the microwave signal for finally giving only has 6.8346875GHz signals and its humorous in theory
Ripple, higher phase demodulation frequency make its phase noise preferable；Microwave signal power is only relevant with voltage controlled oscillator (VCO) characteristic, temperature
Degree good stability.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to making needed for embodiment description
Accompanying drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, without having to pay creative labor, can be obtaining which according to these accompanying drawings
His accompanying drawing.
Fig. 1 is the embodiment schematic diagram of microwave signal synthesizer of the present invention.
Fig. 2 is another embodiment schematic diagram of microwave signal synthesizer of the present invention.
Fig. 3 is embodiment schematic diagram of the present invention for small-sized rubidium atomic frequency standard microwave signal synthesizer
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, it is clear that described embodiment is only this
Bright a part of embodiment, rather than whole embodiments.Embodiment in based on the present invention, those of ordinary skill in the art are not having
There is all other embodiment obtained under the premise of making creative work, belong to the scope of protection of the invention.
" first frequency signal " described in present specification, refers to that mid frequency is first frequency f1Signal；In the same manner：Described
" second frequency signal ", refers to that mid frequency is second frequency f2Signal；" the 3rd frequency signal ", refers to mid frequency
For the 3rd frequency f3Signal.
Fig. 1 is the embodiment schematic diagram of microwave signal synthesizer of the present invention.
A kind of microwave signal synthesizer provided in an embodiment of the present invention, including with lower component：Direct digital synthesis technique
Device 1, I/Q manipulators 2, phase-locked loop circuit 3, loop filter 4, voltage controlled oscillator 5；The microwave signal synthesizer receives defeated
Enter reference signal Si, produce microwave output signal So；The Direct Digital Frequency Synthesizers 1 are used for producing first frequency signal S1；
The voltage controlled oscillator is used for producing the microwave output signal；The I/Q manipulators be used for the first frequency signal and
The microwave output signal is mixed, and produces second frequency signal S2；The phase-locked loop circuit includes the first converter 31, mirror
Phase device 32；First converter 31 is used for the second frequency signal S2Frequency conversion；The phase discriminator 32 is used for described the
The output signal of one converter 31 and the input reference signal SiEnter line frequency to compare, export phase difference signal Sp；The loop filter
Ripple device is used for being input into the phase difference signal, produces voltage controlled oscillator adjustment signal Sv.
Fig. 2 is another embodiment schematic diagram of microwave signal synthesizer of the present invention.
As the embodiment that microwave signal synthesizer of the present invention further optimizes, also include the second converter 6；Described
Two converters, for changing the input reference signal SiFrequency fi, produce the 3rd frequency signal S3；The 3rd frequency letter
Number S3For being input into the Direct Digital Frequency Synthesizers 3.3rd frequency f3For the first frequency f1More than 2.5 times.
As highly preferred embodiment of the present invention, the second frequency f2Frequency f for the microwave output signaloWith described
First frequency f1Sum, i.e. f2=fo+f1.When the present invention quantum part for acting on small-sized rubidium atomic frequency standard, described micro-
The mid frequency of wave output signal is 6.8346875GHz, the first frequency is 5.3125MHz.
Or, the second frequency f2Frequency f for the microwave output signaloWith the first frequency f1Difference, i.e. f2
=fo-f1.When the present invention acts on the quantum part of small-sized rubidium atomic frequency standard, the mid frequency of the microwave output signal
For 6.8346875GHz；The first frequency is 4.6875MHz.
As the embodiment that the present invention further optimizes, the second frequency f2For input reference signal frequency fi's
Multiple；First converter is divided to the second frequency signal, is made the defeated of first converter by the multiple
Go out signal frequency, identical with the frequency of the input reference signal.
In all embodiments of the invention, the frequency of the input reference signal can be adopted for 10MHz.As the I/
Q modulator uses f1When=5.3125MHz carries out up-conversion, when first converter is divided, the multiple is 684；When described
I/Q manipulators use f1When=4.6875MHZ carries out down coversion, when the first converter is divided, the multiple is 683.
Fig. 3 is that a kind of embodiment of the microwave signal synthesizer for small-sized rubidium atomic frequency standard of the present invention is illustrated
Figure, including Direct Digital Frequency Synthesizers (DDS) 1, I/Q manipulators 2, phase-locked loop circuit (PLL) 3, loop filter 4, voltage-controlled
Agitator (VCO) 5；Second converter 6 is one " ÷ 2 × 3 " converter；The phase-locked loop circuit includes the first converter
31st, phase discriminator (PD) 32；First converter is one " ÷ 684 " converter.
It is pointed out that 2 × 3 converters of ÷ are a typical case, other coefficients can essentially be used, such as ×
2 or × 3 or higher, as long as the input reference signal frequency for meeting the Direct Digital Frequency Synthesizers is output signal frequency
More than 2.5 times.
The frequency of the input reference signal is 10MHz, and the input reference signal is divided into two-way, wherein all the way through described
" ÷ 2 × 3 " converter, is transformed into the 3rd frequency signal, and the 3rd frequency is 15MHz (i.e. f3=fi÷ 2 × 3) meet institute
The clock input of Direct Digital Frequency Synthesizers is stated, another road connects the reference input of the phase-locked loop circuit 3.The Direct Digital
The output signal (first frequency signal) of frequency synthesizer, connects the input of the I/Q manipulators, the voltage controlled oscillator defeated
Go out another input for connecing the I/Q manipulators.The output of the I/Q manipulators terminates the radio frequency input of the phase-locked loop circuit
End.The output of the phase-locked loop circuit connects the input of the loop filter, and the output of the loop filter connects described voltage-controlled
The input of agitator.First converter is one " 684 frequency dividing " circuit, is integrated in the inside of the phase-locked loop circuit chip.
The second frequency is 684 times of (i.e. f of the input reference signal frequencyi=f2÷684).
During work, wherein the input reference signal 10MHz obtains frequency for the of 15MHz through 2 × 3 converters of ÷ all the way
Three frequency signals, used as the clock of the Direct Digital Frequency Synthesizers, first frequency signal of the frequency for 5.3215MHz.Institute
The microwave output signal that mid frequency that first frequency signal exported is stated with the voltage controlled oscillator for 6.8346875GHz is through institute
The 3rd frequency signal for obtaining after I/Q manipulators carry out up-conversion that frequency is 6.84GHz is stated, the 3rd frequency signal is through 684
Carry out phase demodulation after secondary frequency dividing with input reference signal 10MHz described in another road, the phase discriminator output through the loop filter,
The voltage controlled oscillator forms complete phase-locked loop loop, and most the microwave output signal mid frequency 6.8346875GHz locks at last
Schedule input reference signal frequency 10MHz.
For small-sized rubidium atomic frequency standard, in order that the microwave output signal with frequency modulation(PFM) feature (for example ±
300Hz step frequency modulation(PFM)s), the function of the Direct Digital Frequency Synthesizers can be set so as to first frequency of output
Rate signal carries frequency modulation(PFM) (such as ± 300Hz step frequency modulation(PFM)s).
It is pointed out that 6.8346875GHz is typical frequencies, during use, there may be the deviation of hundreds of Hz.Adjust
Depth 300Hz processed is also a representative value, may have the domain of walker of hundreds of HZ during use.
Synthesize microwave signal based on embodiments of the invention, have the advantage that：1st, all main body devices are corpusculum productive set
Into chip, circuit overall volume very little；2nd, PHASE-LOCKED LOOP PLL TECHNIQUE is used, the microwave signal for finally giving only has in theory
6.8346875GHz signals and its harmonic wave, higher phase demodulation frequency make its phase noise preferable；3rd, microwave signal power and VCO
Characteristic is relevant, and temperature stability is good.
It will be understood by those skilled in the art that embodiments of the invention can be provided as method, device (equipment) or computer
Program product.Therefore, in terms of the present invention can adopt complete hardware embodiment, complete software embodiment or combine software and hardware
Embodiment form.And, the present invention can be adopted in one or more meters for wherein including computer usable program code
The upper computer journey that implements of calculation machine usable storage medium (including but not limited to disk memory, CD-ROM, optical memory etc.)
The form of sequence product.
The present invention is the flow chart with reference to method according to embodiments of the present invention, device (equipment) and computer program
And/or block diagram is describing.It should be understood that can be by each flow process in computer program instructions flowchart and/or block diagram
And/or the combination of square frame and flow chart and/or the flow process in block diagram and/or square frame.These computer programs can be provided to refer to
Make the processor of general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices to produce
One machine so that produced for realizing by the instruction of computer or the computing device of other programmable data processing devices
The device of the function of specifying in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frames.
These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory is produced to be included referring to
Make the manufacture of device, the command device realize in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or
The function of specifying in multiple square frames.
These computer program instructions can be also loaded in computer or other programmable data processing devices so that in meter
Series of operation steps is executed on calculation machine or other programmable devices to produce computer implemented process, so as in computer or
The instruction executed on other programmable devices is provided for realization in one flow process of flow chart or multiple flow processs and/or block diagram one
The step of function of specifying in individual square frame or multiple square frames.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include excellent
Select embodiment and fall into the had altered of the scope of the invention and change.
Obviously, those skilled in the art can carry out the model of various changes and modification without deviating from the present invention to the present invention
Enclose.So, if these modifications of the present invention and modification belong within the scope of the claims in the present invention and its equivalent technologies, then
The present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of microwave signal synthesizer, it is characterised in that comprising Direct Digital Frequency Synthesizers, I/Q manipulators, phaselocked loop
Circuit, loop filter, voltage controlled oscillator；
The microwave signal synthesizer receives input reference signal, produces microwave output signal；
The Direct Digital Frequency Synthesizers are used for producing first frequency signal；The voltage controlled oscillator is used for producing the microwave
Output signal；The I/Q manipulators are used for being mixed the first frequency signal and the microwave output signal, produce the
Two frequency signals；
The phase-locked loop circuit includes the first converter, phase discriminator；
First converter is used for the second frequency signal frequency conversion；
The phase discriminator compares for the output signal of first converter and the input reference signal are entered line frequency, defeated
Go out phase difference signal；
The loop filter is used for being input into the phase difference signal, produces voltage controlled oscillator adjustment signal.
2. microwave signal synthesizer as claimed in claim 1, it is characterised in that comprising the second converter；
Second converter, for changing the frequency of the input reference signal, produces the 3rd frequency signal；
3rd frequency signal is used for being input into the Direct Digital Frequency Synthesizers；
3rd frequency is more than 2.5 times of the first frequency.
3. microwave signal synthesizer as described in claim 1-2 is arbitrary, it is characterised in that
The second frequency be mid frequency and the first frequency of the microwave output signal and.
4. microwave signal synthesizer as described in claim 1-2 is arbitrary, it is characterised in that
The second frequency is the difference of the mid frequency with the first frequency of the microwave output signal.
5. microwave signal synthesizer as described in claim 1-2 is arbitrary, it is characterised in that
The second frequency is the multiple of the input reference signal frequency；
First converter is divided to the second frequency signal, is made the defeated of first converter by the multiple
Go out signal frequency, identical with the frequency of the input reference signal.
6. microwave signal synthesizer as described in claim 1-2 is arbitrary, it is characterised in that
The frequency of the input reference signal is 10MHz.
7. microwave signal synthesizer as claimed in claim 2, it is characterised in that second converter is 2 × 3 frequency conversions of ÷
Device.
8. microwave signal synthesizer as claimed in claim 3, it is characterised in that
The mid frequency of the microwave output signal is 6.8346875GHz；
The first frequency is 5.3125MHz.
9. microwave signal synthesizer as claimed in claim 4, it is characterised in that
The mid frequency of the microwave output signal is 6.8346875GHz；
The first frequency is 4.6875MHz.
10. microwave signal synthesizer as described in claim 8-9 is arbitrary, it is characterised in that
The frequency of the input reference signal is 10MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851767.4A CN106506003A (en) | 2016-09-26 | 2016-09-26 | A kind of microwave signal synthesizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851767.4A CN106506003A (en) | 2016-09-26 | 2016-09-26 | A kind of microwave signal synthesizer |
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| CN106506003A true CN106506003A (en) | 2017-03-15 |
Family
ID=58290629
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| CN201610851767.4A Pending CN106506003A (en) | 2016-09-26 | 2016-09-26 | A kind of microwave signal synthesizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212917A (en) * | 2019-05-28 | 2019-09-06 | 中国科学院武汉物理与数学研究所 | A kind of atomic clock digital modulation circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030139148A1 (en) * | 1999-09-14 | 2003-07-24 | Morten Damgaard | Wireless transmitter having a modified translation loop architecture |
| CN105187059A (en) * | 2015-07-16 | 2015-12-23 | 中国电子科技集团公司第四十一研究所 | Wideband and low-phase noise local frequency synthesizing circuit and method |
| CN105406864A (en) * | 2015-12-31 | 2016-03-16 | 陕西烽火电子股份有限公司 | Wide-band high-speed frequency hopping frequency synthesizer and working method thereof |
| CN205320060U (en) * | 2015-12-31 | 2016-06-15 | 陕西烽火电子股份有限公司 | High -speed frequency hopping frequency synthesizer in broadband |
| CN105827240A (en) * | 2016-03-14 | 2016-08-03 | 成都天奥电子股份有限公司 | Low-phase-noise 6.8GHz frequency source applied to rubidium atomic clock |
-
2016
- 2016-09-26 CN CN201610851767.4A patent/CN106506003A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030139148A1 (en) * | 1999-09-14 | 2003-07-24 | Morten Damgaard | Wireless transmitter having a modified translation loop architecture |
| CN105187059A (en) * | 2015-07-16 | 2015-12-23 | 中国电子科技集团公司第四十一研究所 | Wideband and low-phase noise local frequency synthesizing circuit and method |
| CN105406864A (en) * | 2015-12-31 | 2016-03-16 | 陕西烽火电子股份有限公司 | Wide-band high-speed frequency hopping frequency synthesizer and working method thereof |
| CN205320060U (en) * | 2015-12-31 | 2016-06-15 | 陕西烽火电子股份有限公司 | High -speed frequency hopping frequency synthesizer in broadband |
| CN105827240A (en) * | 2016-03-14 | 2016-08-03 | 成都天奥电子股份有限公司 | Low-phase-noise 6.8GHz frequency source applied to rubidium atomic clock |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212917A (en) * | 2019-05-28 | 2019-09-06 | 中国科学院武汉物理与数学研究所 | A kind of atomic clock digital modulation circuit |
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