CN109120259A - A kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency source of small size - Google Patents
A kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency source of small size Download PDFInfo
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- CN109120259A CN109120259A CN201810883613.2A CN201810883613A CN109120259A CN 109120259 A CN109120259 A CN 109120259A CN 201810883613 A CN201810883613 A CN 201810883613A CN 109120259 A CN109120259 A CN 109120259A
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- 238000002156 mixing Methods 0.000 claims abstract description 49
- 239000013078 crystal Substances 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 17
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 13
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000011324 bead Substances 0.000 claims description 3
- 230000006866 deterioration Effects 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
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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
- H03L7/08—Details of the phase-locked loop
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- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention discloses a kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency sources of small size, crystal oscillator module passes through DDS respectively and the high steady standard of straight synthesis is all connected with the first mixing filter, first mixing filter connects built-in R frequency divider by dividing filter, main phaselocked loop device passes through loop filter and the second mixing filter connection voltage controlled oscillator, the second mixing filter connection mixing base modules respectively.Beneficial effects of the present invention: the steady reference signal source of height by the way that Digital Frequency Synthesize unit to be realized to superfine stepping frequency hopping and the generation of direct-type frequency synthesis unit first carries out Frequency mixing processing after parallel connection, frequency, the optimization algorithm of making rational planning for make main phase-locked loop operation under integral mode, by being nested with mixing a reference source in main phaselocked loop, reduce the loop N value of main phaselocked loop, it is substantially reduced to make mutually to make an uproar with reference spur deterioration, realizes that ultra-fine stepping, low phase noise, superelevation spurious reduction signal are defeated.
Description
Technical field
The present invention relates to technical field of electronic communication more particularly to a kind of ultra-fine stepping low phase noise superelevation of small size are miscellaneous
It dissipates and inhibits frequency source.
Background technique
Frequency Synthesizes Source abbreviation frequency source is the key that the systems composition such as electronic communication system, radar, electronic countermeasure portion
Part, the superiority and inferiority of frequency source performance decide whole system function it is advanced whether, nominal frequencies synthesis mode will be jumped in thin stepping
Frequency is lower to be realized high spurious reduction often volume is larger, higher cost, debugging difficulty are big, is not easy to be mass produced.
Those skilled in the art are dedicated to solving above-mentioned technological deficiency.
Summary of the invention
In view of the above drawbacks of the prior art, technical purpose of the invention is to provide a kind of ultra-fine stepping of small size low
Phase noise superelevation spurious reduction frequency source.
To realize the above-mentioned technical purpose, the present invention provides a kind of ultra-fine spuious suppressions of stepping low phase noise superelevation of small size
Frequency source processed, including module housing, the module housing include processing module and main phase-locked loop module, and the processing module includes
Crystal oscillator module, DDS, the high steady standard of straight synthesis, the first mixing filter and dividing filter, the main phase-locked loop module include
Built-in R frequency divider, main phaselocked loop device, loop filter, voltage controlled oscillator, the second mixing filter and mixing base modules, institute
State that crystal oscillator module passes through DDS respectively and the high steady standard of straight synthesis is all connected with the first mixing filter, first mixing and filtering
Device connects built-in R frequency divider by dividing filter, and the built-in R frequency divider connects main phaselocked loop device, the main phaselocked loop device
Voltage controlled oscillator, the second mixing filter connection mixing base are connected by loop filter and the second mixing filter respectively
Quasi-mode block.
Preferably, the crystal oscillator module can also connect first with integrated VCO phaselocked loop device by fractional phase lock loop device respectively
Mixing filter.
Preferably, the module housing is internally provided with parting bead.
Preferably, the conversion frequency of the crystal oscillator module is 80MHz ± 5MHz；The conversion frequency of first mixing filter
Rate is 920MHz ± 5MHz；The conversion frequency of the dividing filter is 230MHz ± 5MHz
Preferably, using inside the module housing divides chamber to divide lid shielding processing.
Preferably, the module housing outer surface is fixed using sunk screw.
Preferably, the weight of the module housing is less than 200g.
Beneficial effects of the present invention: by the way that Digital Frequency Synthesize (DDS) unit is realized superfine stepping frequency hopping and direct-type
The steady reference signal source of height that frequency synthesis unit generates first carries out Frequency mixing processing after parallel connection, by after frequency spectrum shift to upper frequency again
It connects with dividing filter, frequency of making rational planning for, optimization algorithm make main phase-locked loop operation under integral mode, avoid the occurrence of decimal
Fractional stray and integral boundary under mode is spuious；By being nested with mixing a reference source in main phaselocked loop, main phaselocked loop is reduced
Loop N value substantially reduces with reference spur deterioration to make mutually to make an uproar, finally realizes that ultra-fine stepping, low phase noise, superelevation are spuious
Inhibit signal output.
Detailed description of the invention
Fig. 1 is module frame chart of the invention；
Fig. 2 is another embodiment of the invention module frame chart；
Specific embodiment
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Such as Fig. 1 and as shown in connection with fig. 2, a kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency source of small size, packet
Module housing is included, the module housing includes processing module 6 and main phase-locked loop module 7, and the processing module 6 includes crystal oscillator module
1, DDS2, the high steady standard 3 of straight synthesis, the first mixing filter 4 and dividing filter 5, the main phase-locked loop module 7 include interior
Set R frequency divider 8, main phaselocked loop device 9, loop filter 10, voltage controlled oscillator 11, the second mixing filter 12 and mixing benchmark mould
Block 13, the crystal oscillator module 1 are all connected with the first mixing filter 4 by DDS2 and the high steady standard 3 of straight synthesis respectively, and described the
One mixing filter 4 connects built-in R frequency divider 8 by dividing filter 5, and the built-in R frequency divider 8 connects main phaselocked loop device 9,
The main phaselocked loop device 9 connects voltage controlled oscillator 11 by loop filter 10 and the second mixing filter 12 respectively, and described the
Two mixing filters 12 connection mixing base modules 13.
Further, the crystal oscillator module 1 can also be connected by fractional phase lock loop device 2 and integrated VCO phaselocked loop device 3 respectively
First mixing filter 4, the module housing are internally provided with parting bead.
Wherein, the conversion frequency of the crystal oscillator module 1 is 80MHz ± 5MHz；The conversion frequency of first mixing filter 4
Rate is 920MHz ± 5MHz；The conversion frequency of the dividing filter 5 is 230MHz ± 5MHz
In addition, the module housing outer surface uses countersunk head using dividing chamber to divide lid shielding processing inside the module housing
Screw is fixed, and the weight of the module housing is less than 200g.
The present invention is by realizing superfine stepping frequency hopping and direct-type frequency synthesis unit for Digital Frequency Synthesize (DDS) unit
The steady reference signal source of height of generation first carries out Frequency mixing processing after parallel connection, by after frequency spectrum shift to upper frequency again with dividing filter
Series connection, frequency of making rational planning for, optimization algorithm make main phase-locked loop operation under integral mode, avoid the occurrence of the decimal under fractional mode
Spuious and integral boundary is spuious；By being nested with mixing a reference source in main phaselocked loop, the loop N value of main phaselocked loop is reduced, thus
Make mutually to make an uproar and be substantially reduced with reference spur deterioration, finally realizes that ultra-fine stepping, low phase noise, superelevation spurious reduction signal are defeated
Out.
Embodiment one
It is a kind of frequency source provided in an embodiment of the present invention, including processing module 6 referring to Fig. 1, the processing module 6 is wrapped
Include crystal oscillator module 1, the high steady benchmark 3 of direct digital synthesizer DDS 2, directly synthesis, mixing and filtering 1 (4), frequency-division filter 5；
The main phase-locked loop module 7 includes sequentially connected built-in R frequency divider 8, main phaselocked loop device 9, loop filter 10,
Voltage controlled oscillator 11, mixing and filtering 2 (12) are mixed reference cell 13.
The application specific work process: signal is issued by crystal oscillator module 1, is transmitted to Direct Digital frequency all the way after function point
Synthesize the Frequency Hopping Signal that DDS2 generates 80MHz ± 5MHz of μ Hz rank；Another way is transmitted to the high steady benchmark 3 of directly synthesis and generates
High steady pure 1GHz signal, this two paths of signals will be removed on DDS signal to 920MHz ± 5MHz through mixing and filtering 14, then is passed through
Become 230MHz ± 5MHz after series connection 5 scaling down processing of frequency-division filter, is handled by region filtering, is transmitted to after frequency of making rational planning for
The mixing reference cell 13 being nested in main phaselocked loop is made to feed back to main lock by main phase-locked loop module 7 by mixing and filtering 2 (12)
The return frequency of phase ring reduces, so that the N value of main phaselocked loop be made to reduce, and makes the main work of phaselocked loop 7 under integral mode, thus
Obtain ultra-fine stepping, low phase noise, the output of superelevation spurious reduction signal.
Embodiment two
As shown in Fig. 2, being another embodiment structure chart provided in an embodiment of the present invention, processing module 6, the processing
Module 6 includes crystal oscillator module 1, fractional phase lock loop 2, integrated VCO phaselocked loop 3, mixing and filtering 1 (4), frequency-division filter 5；The main lock
Phase ring moulds block 7 includes sequentially connected built-in R frequency divider 8, main phaselocked loop device 9, loop filter 10, and voltage controlled oscillator 11 mixes
2 (12) of frequency filtering, are mixed reference cell 13.
Specific work process: issuing signal by crystal oscillator module 1, is transmitted to fractional phase lock loop (2) all the way after function point and generates
The Frequency Hopping Signal of 80MHz ± 5MHz of Hz rank；Another way is transmitted to integrated VCO phaselocked loop 3 and generates high steady pure 1GHz letter
Number, this two paths of signals will be removed on DDS signal to 920MHz ± 5MHz through mixing and filtering 1 (4), then be concatenated frequency-division filter 5 and divide
Frequency becomes 230MHz ± 5MHz after handling, and is handled by region filtering, is transmitted to main phase-locked loop module 7 after frequency of making rational planning for,
The mixing reference cell 13 being nested in main phaselocked loop is made into the return frequency for feeding back to main phaselocked loop by mixing and filtering 2 (12)
Reduce, so that the N value of main phaselocked loop be made to reduce, and main phaselocked loop 7 made to work under integral mode, thus obtain ultra-fine stepping,
Low phase noise, the output of superelevation spurious reduction signal.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (5)
1. a kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency source of small size, it is characterised in that: including module housing,
The module housing includes processing module (6) and main phase-locked loop module (7), the processing module (6) include crystal oscillator module (1),
DDS (2), the high steady standard (3) of straight synthesis, the first mixing filter (4) and dividing filter (5), the main phase-locked loop module
It (7) include built-in R frequency divider (8), main phaselocked loop device (9), loop filter (10), voltage controlled oscillator (11), the second mixing filter
Wave device (12) and mixing base modules (13), the crystal oscillator module (1) pass through DDS (2) and the high steady standard (3) of straight synthesis respectively
It is all connected with the first mixing filter (4), first mixing filter (4) connects built-in R frequency divider by dividing filter (5)
(8), the built-in R frequency divider (8) connects main phaselocked loop device (9), and the main phaselocked loop device (9) passes through loop filter respectively
(10) and the second mixing filter (12) connection voltage controlled oscillator (11), the second mixing filter (12) connection are mixed benchmark
Module (13)；The crystal oscillator module (1) can also connect the by fractional phase lock loop device (2) and integrated VCO phaselocked loop device (3) respectively
One mixing filter (4)；The conversion frequency of the crystal oscillator module (1) is 80MHz ± 5MHz；First mixing filter (4)
Conversion frequency be 920MHz ± 5MHz；The conversion frequency of the dividing filter (5) is 230MHz ± 5MHz.
2. a kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency source of small size as described in claim 1, feature
Be: the module housing is internally provided with parting bead.
3. a kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency source of small size as claimed in claim 2, feature
It is: is used inside the module housing and chamber is divided to divide lid shielding processing.
4. a kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency source of small size as claimed in claim 3, feature
Be: the module housing outer surface is fixed using sunk screw.
5. a kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency source of small size as claimed in claim 4, feature
Be: the weight of the module housing is less than 200g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810883613.2A CN109120259A (en) | 2018-08-06 | 2018-08-06 | A kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency source of small size |
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| CN201810883613.2A CN109120259A (en) | 2018-08-06 | 2018-08-06 | A kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency source of small size |
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| FR2814870A1 (en) * | 2000-09-29 | 2002-04-05 | Sagem | Frequency synthesizer comprising two voltage-controlled oscillators operated in ultra-high frequency range and two phase-locked loops with largely different bandwidths |
| DE10253719A1 (en) * | 2002-11-19 | 2004-06-17 | Newlogic Technologies Ag | Phase locked loop for radio frequency receivers with digitally controlled frequency fine tuning has direct digital synthesizer giving an offset signal which is mixed |
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| CN105187060A (en) * | 2015-07-23 | 2015-12-23 | 中国电子科技集团公司第四十一研究所 | Phase-locked loop circuit with low-phase noise and implementation method thereof |
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| CN107947790A (en) * | 2017-12-15 | 2018-04-20 | 成都爱科特科技发展有限公司 | A kind of thin stepping low noise frequency source in broadband |
| CN209105149U (en) * | 2018-08-06 | 2019-07-12 | 西安众思创融电子科技有限公司 | A kind of ultra-fine stepping low phase noise superelevation spurious reduction frequency source of small size |
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2018
- 2018-08-06 CN CN201810883613.2A patent/CN109120259A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2814870A1 (en) * | 2000-09-29 | 2002-04-05 | Sagem | Frequency synthesizer comprising two voltage-controlled oscillators operated in ultra-high frequency range and two phase-locked loops with largely different bandwidths |
| DE10253719A1 (en) * | 2002-11-19 | 2004-06-17 | Newlogic Technologies Ag | Phase locked loop for radio frequency receivers with digitally controlled frequency fine tuning has direct digital synthesizer giving an offset signal which is mixed |
| CN203352563U (en) * | 2013-07-05 | 2013-12-18 | 四川九洲电器集团有限责任公司 | Low-phase noise frequency synthesizer |
| CN103957008A (en) * | 2014-05-21 | 2014-07-30 | 北京遥测技术研究所 | Multi-ring frequency mixing phase locking frequency synthesis type S frequency band small-step frequency synthesizer |
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