CN209345135U - A kind of super Low phase noise frequency source of thin stepping - Google Patents
A kind of super Low phase noise frequency source of thin stepping Download PDFInfo
- Publication number
- CN209345135U CN209345135U CN201920117654.0U CN201920117654U CN209345135U CN 209345135 U CN209345135 U CN 209345135U CN 201920117654 U CN201920117654 U CN 201920117654U CN 209345135 U CN209345135 U CN 209345135U
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- dds
- phase noise
- super low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The utility model discloses a kind of thin super Low phase noise frequency sources of stepping, and the signal of crystal oscillator couples after frequency multiplier circuit is handled is divided into two-way, straight-through end output to DDS, the reference signal as DDS；Coupled end is mixed with VCO output after amplifier amplifies and generates intermediate-freuqncy signal, which is input to the reference end of phase discriminator；DDS output signal generates the port RF that radiofrequency signal is input to phase discriminator after being mixed with itself reference signal through frequency mixer.The CP of phase discriminator tunes VCO after exporting to loop filter, generates the output signal of needs.The utility model phase of output signal noise is significantly larger than the phase noise of traditional approach, and volume and power consumption have wide prospect under the premise of not having too big variation again on the market.
Description
Technical field
The utility model belongs to field of communication technology, and in particular to it is a kind of improved based on phase-locked loop circuit it is novel
The super Low phase noise frequency source technology of thin stepping.
Background technique
In microwave system, frequency source is the core equipment of microwave system, is the important leverage of overall performance index.With
The rapid development of modern communication technology, microwave system is in radar, guidance, secure communication, electronic countermeasure and civil systems
(LMDS, MVDS) etc. has extensive purposes, and the attention by countries in the world.
Frequency source is Modern Communication System, the essential critical component of radar system.And broadband frequency source is that radar is led
Key building block in leader, main function are that generation broadband local oscillator signal or target seeker self-test signal, its performance refer to
Mark directly influences the performance of entire radar system.Broadband frequency signals generation technology is the Xiang Guanjian in modern radar design
Technology, for the generation of single frequency point signal, to realize good phase noise performance and Hopping time etc. in big bandwidth
Index has bigger difficulty, needs to comprehensively consider the factor of various aspects.Therefore frequency source technology be present microwave measurement,
Key technology inside the application fields such as communication and radar system.
Since the 1990s, with the growth to millimeter-wave technology demand and millimetre-wave radar transmitting has been developed
The development of the important breakthrough of the various aspects such as machine, receiver, antenna and passive device, millimeter-wave technology enters a new rank
Section.Meanwhile this also proposes increasingly higher demands to millimeter wave frequency source.Miniaturization, ultra wide band, low spurious and low-power consumption at
Hot spot and main development trend for research.Minimizing integrated packaging technology is that electronic device performance improves, function increases
Add, the important restriction factor that production scale expands and cost reduces.Realizing miniaturization integration packaging, there are many technologies, including low temperature
Common burning porcelain (LTCC), film, silicon wafer semiconductor and multilayer circuit plate technique etc..Currently, from machining accuracy, integration density and can
Comprehensively consider by property etc., LTCC, which has, stablizes low-loss dielectric constant, excellent conduction band adhesive force and good mechanical strength
The advantages that with heat dissipation, and it is flexible and changeable in multilayer circuit design, it is easy to accomplish High Density Integration and small-sized encapsulated.
Frequency source technology is the very big advanced circuit engineering of a technical difficulty, its quality directly affect radar, navigation,
The performance indicator of communication, space electronic technology and instrument, instrument etc..Frequency source can be divided into two major class, self-oscillation source and conjunction
At frequency source.Frequency synthesis be originated from grow up after be widely used in present electronic system.
Frequency synthesis source is generally divided into four big forms, both direct analog synthesis, direct digital signal synthesizing, indirect analog formula
Synthesis, digital synthesis indirectly, various synthesis modes are respectively biased to.Indirect digital synthesis application is the most extensive, mainly
It is realized by phase-locked loop circuit and a variety of interlock circuits derived.The signal that digital synthesis mode generates indirectly has preferably
Phase noise, output factors, frequency stepping and bandwidth of operation, but frequency hopping speed is the defect of this synthesis mode slowly, limit
Indirect Digital Type Synthetic Technology has been made in the application in fast frequency-hopped field.
Phase noise is the important indicator for measuring frequency synthesizer, it influences very the performance of electronic equipment and electronic system
Greatly, it is distributed in carrier signal both sides by power law Spectral structure in terms of frequency domain, refers generally to be drawn under various noise contributions in system
The phase of output signal random fluctuation risen.As shown in Figure 2: phaselocked loop is most common frequency synthesis mode, has small in size, function
Consume that low, circuit is simple, index is preferable and enjoys great popularity.But the shortcoming of phaselocked loop is it is also obvious that most significant is exactly phase
Position noise and Hopping time.Mutually noise by the bottom of all devices because made an uproar restriction, so that the phase of pll output signal is made an uproar
Sound is limited, ordinary circumstance we assess the in-band phase noise of phaselocked loop as follows, it may be assumed that PN=PNfloor-10*log
(Fpd/Hz) -20*log(N/Hz).PNfloor is that the bottom of the phase discriminator in phase-locked loop circuit is made an uproar, this index is to restrict phase
The major parameter of noise.It with the continuous development of electronic technology, is also higher and higher to the demand of technical indicator.It minimizes, is low
Cost, low-power consumption have become the development trend of entire industry, and the phase noise of phase-locked loop frequency synthesizer has become bottleneck, anxious
Traditional mode need to be broken through, the phase noise that phaselocked loop is improved on the basis of inherent technology is just more important.
Summary of the invention
For overcome it is above-mentioned there are deficiency, the inventor of the utility model passes through long-term explorations trial and multiple reality
It tests and effort, keeps reforming and innovate, propose a kind of super Low phase noise frequency source technology of thin stepping, which is based on phaselocked loop
Circuit improves.Compared with traditional phase-locked loop circuit, under the premise of guaranteeing that other indexs do not deteriorate, improve well
The index of phase noise.
To achieve the goals above, specific technical solution used by the utility model is: a kind of thin ultralow phase of stepping
Make an uproar frequency source comprising crystal oscillator, frequency multiplier circuit, amplifier, DDS, phase discriminator, loop filter, voltage controlled oscillator and
Power splitter, the crystal oscillator output signal inputs the first coupler after frequency multiplier circuit and is divided into two-way output, wherein one
Road is exported to DDS, and as the reference signal of DDS, another way inputs the second frequency mixer after amplifier amplifies；DDS output letter
Radiofrequency signal is generated after number being mixed with reference signal through the first frequency mixer is input to phase discriminator；The output end of phase discriminator is exported to ring
Path filter, loop filter connect voltage controlled oscillator, and voltage controlled oscillator output end is divided into two-way after power splitter, makees all the way
For output signal output, another way is input to the second frequency mixer with the first amplified signal of coupler coupled end and mixes in generation
Frequency signal is input to phase discriminator.
According to a kind of thin super Low phase noise frequency source of stepping described in the utility model, further technical solution is: institute
Stating the first coupler is directional coupler.
According to a kind of thin super Low phase noise frequency source of stepping described in the utility model, further technical solution is: institute
The straight-through end for stating the first coupler is exported to DDS, and coupled end inputs the second frequency mixer after amplifier amplifies.
According to a kind of thin super Low phase noise frequency source of stepping described in the utility model, further technical solution is: institute
Stating frequency multiplier circuit is SZ-3200 frequency multiplier circuit.
According to a kind of thin super Low phase noise frequency source of stepping described in the utility model, further technical solution is: institute
Stating amplifier is NBB-310 amplifier.
According to a kind of thin super Low phase noise frequency source of stepping described in the utility model, further technical solution is: institute
Stating voltage controlled oscillator is HMC388LP4E voltage controlled oscillator.
According to a kind of thin super Low phase noise frequency source of stepping described in the utility model, further technical solution is: institute
Stating the first frequency mixer is HMC422MS8G frequency mixer, and the second frequency mixer is HMC232 frequency mixer.
According to a kind of thin super Low phase noise frequency source of stepping described in the utility model, further technical solution is: institute
Stating phase discriminator is ADF4106BCPZ phase discriminator.
According to a kind of thin super Low phase noise frequency source of stepping described in the utility model, further technical solution is: institute
DDS is stated using DDS AD9954BCPZ.
According to a kind of thin super Low phase noise frequency source of stepping described in the utility model, further technical solution is: DDS
Output signal generates radiofrequency signal after being mixed with reference signal through the first frequency mixer and is input to the end phase discriminator RF, the first coupler coupling
It closes the amplified signal in end and is input to the reference end that the second frequency mixer mixing generation intermediate-freuqncy signal is input to phase discriminator.
Compared with prior art, the technical solution of the utility model has the advantages that the utility model is based on phaselocked loop
Circuits improvement under the premise of guaranteeing that other indexs do not deteriorate, improves phase compared with traditional phase-locked loop circuit well
The index of noise.The utility model product has small in size, at low cost, and product is more competitive, and minimizing, thin stepping is low
There is very extensive prospect of the application in the field mutually made an uproar.
Detailed description of the invention
It, below will be to required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore not
It should be considered as the restriction to range, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 is technical solutions of the utility model schematic diagram.
Fig. 2 is phase-locked loop frequency synthesizer functional schematic in the prior art.
In figure: 1 crystal oscillator, 2 frequency multiplier circuits, 3 first couplers, 4 amplifiers, 5 second couplers, 6 DDS, 7
First frequency mixer, 8 phase discriminators, 9 second frequency mixers, 10 loop filters, 11 voltage controlled oscillators, 12 power splitters.
Specific embodiment
Technical solution is described in detail in conjunction with the accompanying drawings in the utility model embodiment, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the reality in the utility model
Mode is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts is all
Belong to the range of the utility model protection.Therefore, below the detailed description for providing embodiment in the accompanying drawings is not intended to limit
The range of claimed invention processed, but it is merely representative of the selected embodiment of the utility model.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then it further can not be defined and explained in subsequent attached drawing.
Embodiment:
The super Low phase noise frequency source of a kind of thin stepping as shown in Figure 1: comprising crystal oscillator 1, frequency multiplier circuit 2, amplifier
4, DDS6, phase discriminator 8, loop filter 10, voltage controlled oscillator 11 and power splitter 12.The output signal of the crystal oscillator 1
It is divided into two-way output after inputting the first coupler 3 after frequency multiplier circuit 2, wherein exporting the reference to DDS6, as DDS all the way
Signal, another way input the second frequency mixer 9 after the amplification of amplifier 4；The output signal of DDS6 and the reference signal of DDS are through
Radiofrequency signal, which is generated, after the mixing of one frequency mixer 7 is input to phase discriminator 8.The output end of phase discriminator 8 is exported to loop filter 10, ring
Path filter 10 connects voltage controlled oscillator 11, and 11 output end of voltage controlled oscillator is divided into two-way after power splitter 12, conduct all the way
Output signal output, another way are input to the second frequency mixer 9 with the amplified signal of 3 coupled end of the first coupler and mix in generation
Frequency signal is input to phase discriminator 8.The output end of first coupler 3 connects the second coupler 5, another way connection amplification all the way
Device 4.
The technical indicator that the present embodiment is mainly realized is as follows:
1) output frequency: 3200MHz~3300MHz；2) frequency stepping: 0.1Hz；
3) output power: >=+4dBm；
4) phase noise :≤- 126dBc/Hz@1kHz；≤-128dBc/Hz@10kHz；
≤-128dBc/Hz@100kHz；
5) harmonics restraint: >=60dBc；6) spurious reduction: >=70dBc；7) Hopping time :≤60us.
It is existing after realizing that above-mentioned technical indicator, each electronic component involved in the present embodiment use specific model
Following introduction is done to the working principle of the present embodiment in conjunction with specific structure model.The signal HHGSBD- of crystal oscillator
100.00MHz coupling after frequency multiplier circuit SZ-3200 processing is divided into two-way, leads directly to end output to DDS AD9954BCPZ, makees
For the reference signal of DDS AD9954BCPZ；Coupled end exports after amplifier NBB-310 amplification with VCO HMC388LP4E
It is mixed HMC232 and generates intermediate-freuqncy signal, which is input to the reference end of phase discriminator ADF4106BCPZ；DDS AD9954BCPZ is defeated
Radiofrequency signal is generated after signal is mixed with itself reference signal through frequency mixer HMC422MS8G out is input to phase discriminator
The port RF of ADF4106BCPZ.The CP of phase discriminator ADF4106BCPZ tunes VCO after exporting to loop filter
HMC388LP4E generates the output signal of needs.
The phase of output signal noise of the program is significantly larger than the phase noise of traditional approach, and volume and power consumption do not have again
There is wide prospect on the market under the premise of too big variation.
DDS signal and the reference signal of itself are input to the RF of phase discriminator as radiofrequency signal in the present embodiment after being mixed
End, the frequency after crystal oscillator frequency multiplication be mixed with output frequency after reference signal of the signal as phase discriminator.It will be traditional
The reference of phase-locked loop circuit and the end RF, which are inverted, to be used, final output frequency are as follows: F0=F1+R* (F1+Fdds)/N, wherein F1 is crystalline substance
The intermediate frequency letter that frequency, the reference signal frequency divider that R is phase discriminator after vibration frequency multiplication 32 times, N are frequency dividing ratio, Fdds is DDS output
Number.By formula it can be seen that the phase noise of F0 is codetermined by F1 and (F1+Fdds), F1 is that crystal oscillator frequency multiplication generates, according to 20*
Log (N) deteriorates；The phase noise of Fdds is much higher than he itself reference signal F1, then can optimize phase noise after dividing, then presses
According to noise superposition calculation mode, the phase noise of F0 ultimately depends on F1.F1 deteriorates according to 20*log (N), then final phase
Noise has crystal oscillator decision.Selected constant-temperature crystal oscillator can significantly improve the phase noise of output signal.The resolution of DDS
Rate is up to 0.001Hz, the resolution ratio of output frequency having stepped through all dependent on DDS, to realize the function of thin stepping.
In above-described embodiment the product of each concrete model be all applicant according at present above on major channel purchase
It buys.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to
Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above "
One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special
Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only
Indicate that first feature horizontal height is less than second feature.
Above are merely preferred embodiments of the utility model, it is noted that above-mentioned preferred embodiment should not regard
For limitations of the present invention, the protection scope of the utility model should be defined by the scope defined by the claims..For
For those skilled in the art, without departing from the spirit and scope of the utility model, it can also make several
Improvements and modifications, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (10)
1. a kind of super Low phase noise frequency source of thin stepping, it is characterised in that: including crystal oscillator, frequency multiplier circuit, amplifier, DDS,
Phase discriminator, loop filter, voltage controlled oscillator and power splitter, the crystal oscillator output signal input after frequency multiplier circuit
First coupler is divided into two-way output, wherein being exported all the way to DDS, as the reference signal of DDS, another way is put by amplifier
The second frequency mixer is inputted after big；DDS output signal generates radiofrequency signal after being mixed with reference signal through the first frequency mixer and is input to
Phase discriminator；The output end of phase discriminator is exported to loop filter, and loop filter connects voltage controlled oscillator, voltage controlled oscillator output
End is divided into two-way after power splitter, exports all the way as output signal, another way and the first coupler coupled end are amplified
Signal is input to the second frequency mixer mixing generation intermediate-freuqncy signal and is input to phase discriminator.
2. a kind of thin super Low phase noise frequency source of stepping according to claim 1, which is characterized in that first coupler is
Directional coupler.
3. a kind of thin super Low phase noise frequency source of stepping according to claim 2, which is characterized in that first coupler
To DDS, coupled end inputs the second frequency mixer after amplifier amplifies for straight-through end output.
4. a kind of thin super Low phase noise frequency source of stepping according to claim 1, which is characterized in that the frequency multiplier circuit is
SZ-3200 frequency multiplier circuit.
5. a kind of thin super Low phase noise frequency source of stepping according to claim 1, which is characterized in that the amplifier is NBB-
310 amplifiers.
6. a kind of thin super Low phase noise frequency source of stepping according to claim 1, which is characterized in that the voltage controlled oscillator is
HMC388LP4E voltage controlled oscillator.
7. a kind of thin super Low phase noise frequency source of stepping according to claim 1, which is characterized in that first frequency mixer is
HMC422MS8G frequency mixer, the second frequency mixer are HMC232 frequency mixer.
8. a kind of thin super Low phase noise frequency source of stepping according to claim 1, which is characterized in that the phase discriminator is
ADF4106BCPZ phase discriminator.
9. a kind of thin super Low phase noise frequency source of stepping according to claim 1, which is characterized in that the DDS using
DDS AD9954BCPZ。
10. a kind of thin super Low phase noise frequency source of stepping according to claim 1, which is characterized in that DDS output signal and ginseng
It examines signal generation radiofrequency signal after the mixing of the first frequency mixer and is input to the end phase discriminator RF, the first coupler coupled end is amplified
Signal is input to the mixing of the second frequency mixer and generates the reference end that intermediate-freuqncy signal is input to phase discriminator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920117654.0U CN209345135U (en) | 2019-01-24 | 2019-01-24 | A kind of super Low phase noise frequency source of thin stepping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920117654.0U CN209345135U (en) | 2019-01-24 | 2019-01-24 | A kind of super Low phase noise frequency source of thin stepping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209345135U true CN209345135U (en) | 2019-09-03 |
Family
ID=67761994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920117654.0U Active CN209345135U (en) | 2019-01-24 | 2019-01-24 | A kind of super Low phase noise frequency source of thin stepping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209345135U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258929A (en) * | 2021-07-15 | 2021-08-13 | 成都威频通讯技术有限公司 | Low phase noise frequency source circuit |
-
2019
- 2019-01-24 CN CN201920117654.0U patent/CN209345135U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258929A (en) * | 2021-07-15 | 2021-08-13 | 成都威频通讯技术有限公司 | Low phase noise frequency source circuit |
| CN113258929B (en) * | 2021-07-15 | 2021-09-24 | 成都威频通讯技术有限公司 | Low phase noise frequency source circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Guo et al. | A 135–150-GHz frequency tripler with waveguide filter matching | |
| CN111987995B (en) | Comb signal source based on frequency mixing modulation feedback loop | |
| CN103762979A (en) | Broadband frequency source for LTE channel simulator | |
| CN209345135U (en) | A kind of super Low phase noise frequency source of thin stepping | |
| CN208479596U (en) | A kind of super Low phase noise broadband frequency source | |
| CN107196653B (en) | Broadband low-phase noise frequency synthesizer | |
| Wu et al. | A 53–78 GHz complementary push–push frequency doubler with implicit dual resonance for output power combining | |
| CN102480281B (en) | Millimeter wave frequency source device | |
| CN209881735U (en) | Novel high-speed Ku-waveband low-phase-noise microwave source | |
| CN210111948U (en) | Comb signal source based on mixing modulation feedback loop | |
| CN204836137U (en) | Frequency synthesizer | |
| CN101316112A (en) | Frequency synthesizer used for frequency hopping system | |
| CN209345134U (en) | A kind of agile frequency source of miniaturization | |
| Siripon et al. | Novel Sub-Harmonic Injection-Locked Balanced Oscillator | |
| CN110784215B (en) | System for generating center frequency variable high-speed linear frequency modulation signal based on phase-locked loop | |
| CN211296711U (en) | Ku waveband FMCW excitation source link structure based on phase-locked mode | |
| CN209201057U (en) | Broadband frequency agility signal source module | |
| CN209057196U (en) | The super Low phase noise broadband frequency source in broadband | |
| CN109787562B (en) | Ultra-wideband millimeter wave frequency conversion module and assembly | |
| Chattopadhyay et al. | Frequency multiplier response to spurious signals and its effect on local oscillator systems in millimeter and submillimeter wavelengths | |
| Carpenter et al. | A 115–155 GHz quadrature up-converting MMIC mixer in InP DHBT technology | |
| Le et al. | A two-path output low phase noise local oscillator for RF front-end applications | |
| Zhang et al. | Compact Multifunctional 180° Hybrid Based 300 GHz Sub-Harmonic I/Q Down-Conversion Resistive Mixers in 130 nm SiGe Process | |
| Winkler et al. | 24 GHz transceiver front-end with two RX-channels | |
| CN214473924U (en) | Millimeter wave sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |