CN107196653A - A kind of broadband Low phase noise apparatus for frequency synthesizing - Google Patents
A kind of broadband Low phase noise apparatus for frequency synthesizing Download PDFInfo
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- CN107196653A CN107196653A CN201710251274.1A CN201710251274A CN107196653A CN 107196653 A CN107196653 A CN 107196653A CN 201710251274 A CN201710251274 A CN 201710251274A CN 107196653 A CN107196653 A CN 107196653A
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- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 27
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 8
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- 230000006866 deterioration Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
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- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
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- 239000008358 core component Substances 0.000 description 1
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- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- H03L7/16—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
- H03L7/181—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 a numerical count result being used for locking the loop, the counter counting during fixed time intervals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
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- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention discloses a kind of broadband Low phase noise apparatus for frequency synthesizing, and in particular to frequency synthesis technique field.The broadband Low phase noise apparatus for frequency synthesizing, reference circuit including interconnection, broadband signal generation circuit, mixting circuit, circuit and fractional frequency division circuit occur for point-frequency signal, 6~12GHz broadband covering is realized using the first voltage controlled oscillator and the combination of the second voltage controlled oscillator, occurs the 2.5GHz that circuit is produced using point-frequency signal, 5GHz, the broadband high-frequency signals of 10GHz Low phase noise point-frequency signal and 6~12GHz are mixed, realize that broadband high-frequency signals frequency is moved downwards to 0.2~3GHz, reduction is because the deterioration of mutually making an uproar that frequency-doubled effect is brought, realize the Low phase noise of output signal, the high frequency resolution of apparatus for frequency synthesizing output frequency is realized using Fractional Frequency-Dividing Technology.
Description
Technical field
The present invention relates to frequency synthesis technique field, and in particular to a kind of broadband Low phase noise apparatus for frequency synthesizing.
Background technology
With developing rapidly for electronic information technology, various high-quality sophisticated signals, the opposing party on the one hand should be produced
Face is accurately measured sophisticated signal again.Either the generation of signal is still analyzed signal, all be unable to do without electronics
The core component of equipment --- apparatus for frequency synthesizing.High performance frequency synthesizer is the pith of contemporary electronic systems equipment,
It is widely used in the equipment such as present mobile communication, phased-array radar and high-end electronic measuring instrument, it sets to electronic system
Standby performance plays conclusive effect.
The content of the invention
The purpose of the present invention is that occur Low phase noise point-frequency signal and broadband high-frequency signals that circuit is produced by point-frequency signal
It is mixed, realizes that broadband high-frequency signals frequency is moved downwards to 0.2~3GHz, reduction because the evil of mutually making an uproar that frequency-doubled effect is brought
A kind of broadband Low phase noise apparatus for frequency synthesizing changed.
The present invention is specifically adopted the following technical scheme that：
A kind of broadband Low phase noise apparatus for frequency synthesizing, including it is the reference circuit of interconnection, broadband signal generation circuit, mixed
Circuit and fractional frequency division circuit occur for frequency circuit, point-frequency signal；
The broadband signal generation circuit includes the first voltage controlled oscillator and the second voltage controlled oscillator being in parallel, the first pressure
One end of controlled oscillator and the second voltage controlled oscillator is in series with phase discriminator, loop filter and the first either-or switch, the other end
It is in series with the second either-or switch and directional coupler；
The fractional frequency division circuit includes the decimal frequency divider and the first two-divider, decimal frequency divider and phase demodulation being in series
Device is connected；
The mixting circuit include be sequentially connected the 3rd either-or switch, the first frequency mixer, the 4th either-or switch and
Second frequency mixer, directional coupler is connected with the second frequency mixer, and LPF is passed through between mixting circuit and fractional frequency division circuit
Device is connected；
The point-frequency signal generation circuit, which includes being connected with power splitter, power splitter on phase-locked loop circuit, phase-locked loop circuit, to be connected
There are the tie point being in parallel and the second branch road, tie point includes the first bandpass filter and the second two divided-frequency mutually contacted
Device, the 5th either-or switch, the second bandpass filter, varactor doubler and the 6th alternative that the second branch road includes being in series is opened
Close, the output end of tie point is connected with the first frequency mixer, and the output end of the second branch road is connected with the second frequency mixer.
Preferably, the signal frequency of the reference circuit is 100MHz.
Preferably, the signal of the phase-locked loop circuit output is 5GHz point-frequency signals, the second two-divider output signal
Frequency is 2.5GHz, and the centre frequency of the first bandpass filter is 2.5GHz.
Preferably, the frequency of the varactor doubler output signal is 10GHz, and the centre frequency of the second bandpass filter is
10GHz。
Preferably, the reference frequency output of first voltage controlled oscillator is 6~9GHz, the output of the second voltage controlled oscillator
Frequency range is 9~12GHz.
Preferably, the frequency range of the directional coupler is 6~12GHz.
Preferably, one end incoming frequency scope that second frequency mixer is connected with directional coupler is 6~12GHz, with
It is 5GHz or 10GHz that the connected one end incoming frequency of circuit, which occurs, for point-frequency signal, and the one end being connected with the 4th either-or switch is defeated
Go out frequency range for 0.2~5.2GHz.
Preferably, one end incoming frequency scope that first frequency mixer is connected with the 4th either-or switch be 4.8~
5.2GHz, one end incoming frequency being connected with point-frequency signal generation circuit is 2.5GHz, one be connected with the 3rd either-or switch
End reference frequency output is 2.3~2.7GHz.
Preferably, the first two-divider incoming frequency scope be 0.2~3GHz, reference frequency output be 0.1~
1.5GHz。
Preferably, the decimal frequency divider incoming frequency scope is 0.1~1.5GHz, and reference frequency output is 0.1GHz.
The present invention has the advantages that：The present invention is real using the first voltage controlled oscillator and the combination of the second voltage controlled oscillator
Existing 6~12GHz broadband covering；2.5GHz, 5GHz, 10GHz that circuit is produced low phase noise occur using point-frequency signal
The broadband high-frequency signals of frequency signal and 6~12GHz are mixed, realize broadband high-frequency signals frequency move downwards to 0.2~
3GHz, reduction are because the deterioration of mutually making an uproar that frequency-doubled effect is brought, realizes the Low phase noise of output signal；Realized using Fractional Frequency-Dividing Technology
The high frequency resolution of apparatus for frequency synthesizing output frequency；Meeting contemporary electronic systems equipment will to the index of apparatus for frequency synthesizing
Ask.
Brief description of the drawings
Fig. 1 is the theory diagram of broadband Low phase noise apparatus for frequency synthesizing；
Fig. 2 is 5GHz phaselocked loops (PLL) theory diagram；
When Fig. 3 is the offset carrier 10KHz of broadband Low phase noise apparatus for frequency synthesizing, phase noise measurement result schematic diagram.
Wherein, 1 is reference circuit, and 2 be phase discriminator, and 3 be loop filter, and 4 be the first either-or switch, and 5 be the first pressure
Controlled oscillator, 6 be the second voltage controlled oscillator, and 7 be the second either-or switch, and 8 be directional coupler, and 9 be decimal frequency divider, and 10 are
First two-divider, 11 be low pass filter, and 12 be the 3rd either-or switch, and 13 be the first frequency mixer, and 14 be the 4th alternative
Switch, 15 be the second frequency mixer, and 16 be the first bandpass filter, and 17 be the 5th either-or switch, and 18 be the second bandpass filter,
19 be the second two-divider, and 20 be varactor doubler, and 21 be the 6th either-or switch, and 22 be power splitter, and 23 be phase-locked loop circuit.
Embodiment
The embodiment of the present invention is described further with specific embodiment below in conjunction with the accompanying drawings：
As Figure 1-3, a kind of broadband Low phase noise apparatus for frequency synthesizing, includes reference circuit 1, the broadband letter of interconnection
Circuit and fractional frequency division circuit occur for number generation circuit, mixting circuit, point-frequency signal；
The signal frequency of reference circuit is 100MHz, and 100MHz reference frequency is provided for apparatus for frequency synthesizing.
Broadband signal generation circuit realizes 6~12GHz using the combination of the first voltage controlled oscillator and the second voltage controlled oscillator
Frequency coverage, including the first voltage controlled oscillator 5 and the second voltage controlled oscillator 6 being in parallel, the first voltage controlled oscillator 5 and second
One end of voltage controlled oscillator 6 is in series with phase discriminator 2, the either-or switch 5 of loop filter 3 and first, and the other end is in series with second
Either-or switch 7 and directional coupler 8.
Fractional frequency division circuit realizes that the high-frequency of apparatus for frequency synthesizing output frequency is differentiated using sigma-delta Fractional Frequency-Dividing Technology
Rate and low phase noise, including the two-divider 10 of decimal frequency divider 9 and first being in series, decimal frequency divider 9 and the phase of phase discriminator 2
Even.
Mixting circuit is mixed using 2.5GHz, 5GHz, 10GHz point-frequency signal and 6~12GHz broadband high-frequency signals
Frequently, realize that frequency is moved downwards to 0.2~3GHz, reduce because of the deterioration of mutually making an uproar that frequency-doubled effect is brought, including be sequentially connected
3rd either-or switch 12, the first frequency mixer 13, the 4th either-or switch 14 and the second frequency mixer 15, directional coupler 8 and
Two frequency mixers 15 are connected, and are connected between mixting circuit and fractional frequency division circuit by low pass filter 11.
The Low phase noise mixing frequencies that circuit provides 2.5GHz, 5GHz, 10GHz for mixting circuit occur for point-frequency signal, including
It is connected with phase-locked loop circuit 23, phase-locked loop circuit 23 on power splitter 22, power splitter 22 and is connected with the tie point being in parallel and second
Branch road, tie point includes the first bandpass filter 16 and the second two-divider 19 mutually contacted, and the second branch road includes being in series
The 5th either-or switch 17, the second bandpass filter 18, the either-or switch 21 of varactor doubler 20 and the 6th, tie point it is defeated
Go out end with the first frequency mixer 13 to be connected, the output end of the second branch road is connected with the second frequency mixer 15.
The signal that phase-locked loop circuit 23 is exported is 5GHz point-frequency signals, and the frequency of the output signal of the second two-divider 19 is
2.5GHz, the centre frequency of the first bandpass filter 16 is 2.5GHz.
The frequency of the output signal of varactor doubler 20 is 10GHz, and the centre frequency of the second bandpass filter 18 is 10GHz.
The reference frequency output of first voltage controlled oscillator 5 is 6~9GHz, the reference frequency output of the second voltage controlled oscillator 6
For 9~12GHz.
The frequency range of directional coupler 8 is 6~12GHz.
One end incoming frequency scope that second frequency mixer 15 is connected with directional coupler 8 is 6~12GHz, with point-frequency signal
It is 5GHz or 10GHz, one end output frequency being connected with the 4th either-or switch 14 to occur the connected one end incoming frequency of circuit
Scope is 0.2~5.2GHz.
One end incoming frequency scope that first frequency mixer 13 is connected with the 4th either-or switch 14 is 4.8~5.2GHz, with
It is 2.5GHz that the connected one end incoming frequency of circuit, which occurs, for point-frequency signal, one end output frequency being connected with the 3rd either-or switch 12
Rate scope is 2.3~2.7GHz.
The incoming frequency scope of first two-divider 10 is 0.2~3GHz, and reference frequency output is 0.1~1.5GHz.
The incoming frequency scope of decimal frequency divider 9 is 0.1~1.5GHz, and reference frequency output is 0.1GHz.
The operation principle of the broadband Low phase noise apparatus for frequency synthesizing is：Shaken using the first voltage controlled oscillator 5 and second are voltage-controlled
Swing the broadband covering that device 6 realizes 6~12GHz.Pass through the first either-or switch 4 and the selection switching of the second either-or switch 7.Profit
An input for being output to the frequency mixer of frequency mixer second is coupled with directional coupler 8.
When the frequency range of coupling output is 6~8GHz or 9.8~10.2GHz, the lock phase of circuit occurs for point-frequency signal
The 5GHz signals that loop circuit 23 (PLL) is produced enter by power splitter 22, the 6th either-or switch 21 and the 5th either-or switch 17
Enter another input to the second frequency mixer 15, mixing output 1~3GHz or 4.8~5.2GHz frequency.
When the frequency range of coupling output is 8~9.8GHz or 10.2~12GHz, the lock phase of circuit occurs for point-frequency signal
The 5GHz signals that loop circuit 23 (PLL) is produced pass through power splitter 22, the 6th either-or switch 21, varactor doubler 20, the second band logical
The either-or switch 17 of wave filter 18 and the 5th enters another input of the second frequency mixer 15,0.2~2GHz of mixing output
Frequency.
As the second frequency mixer 15 mixing 0.2~2GHz of output or 1~3GHz frequencies, pass through the He of the 4th either-or switch 14
The selection switching of 3rd either-or switch 12, the input of the second two-divider 10 is entered by low pass filter 11.
When the second frequency mixer 15 mixing output 4.8~5.2GHz frequencies, the is entered by the 4th either-or switch 14
One input of one frequency mixer 13, the 5GHz signals that the phase-locked loop circuit 23 (PLL) that circuit occurs for point-frequency signal is produced pass through
Power splitter 22, the second two-divider 19, the first bandpass filter 16 enter another input of the first frequency mixer 13, mixing
The frequency for exporting 2.3~2.7GHz enters the defeated of the first two-divider 10 by the 3rd either-or switch 12, low pass filter 11
Enter end.
The frequency of first two-divider 10 output enters the input of decimal frequency divider 9, is obtained after fractional frequency division
0.1GHz frequencies enter phase discriminator 2 and carry out phase demodulation with reference frequency, and the first alternative is utilized after being filtered by loop filter 3
Switch 4 drives the first voltage controlled oscillator 5 or the second voltage controlled oscillator 6 to produce 6~12GHz wideband frequency.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made in the essential scope of the present invention, should also belong to the present invention's
Protection domain.
Claims (10)
1. a kind of broadband Low phase noise apparatus for frequency synthesizing, it is characterised in that the reference circuit including interconnection, broadband signal production
Circuit and fractional frequency division circuit occur for raw circuit, mixting circuit, point-frequency signal；
The broadband signal generation circuit includes the first voltage controlled oscillator and the second voltage controlled oscillator that are in parallel, and first voltage-controlled shakes
The one end for swinging device and the second voltage controlled oscillator is in series with phase discriminator, loop filter and the first either-or switch, other end series connection
There are the second either-or switch and directional coupler；
The fractional frequency division circuit includes the decimal frequency divider and the first two-divider being in series, decimal frequency divider and phase discriminator phase
Even；
The mixting circuit includes the 3rd either-or switch, the first frequency mixer, the 4th either-or switch and second being sequentially connected
Frequency mixer, directional coupler is connected with the second frequency mixer, passes through low pass filter phase between mixting circuit and fractional frequency division circuit
Even；
The point-frequency signal generation circuit, which includes being connected with power splitter, power splitter on phase-locked loop circuit, phase-locked loop circuit, is connected with phase
Tie point in parallel and the second branch road, tie point include the first bandpass filter and the second two-divider mutually contacted, the
Two branch roads include the 5th either-or switch, the second bandpass filter, varactor doubler and the 6th either-or switch being in series, first
The output end of branch road is connected with the first frequency mixer, and the output end of the second branch road is connected with the second frequency mixer.
2. a kind of broadband Low phase noise apparatus for frequency synthesizing as claimed in claim 1, it is characterised in that the letter of the reference circuit
Number frequency is 100MHz.
3. a kind of broadband Low phase noise apparatus for frequency synthesizing as claimed in claim 1, it is characterised in that the phase-locked loop circuit is defeated
The signal gone out is 5GHz point-frequency signals, during the frequency of the second two-divider output signal is 2.5GHz, the first bandpass filter
Frequency of heart is 2.5GHz.
4. a kind of broadband Low phase noise apparatus for frequency synthesizing as claimed in claim 1, it is characterised in that the varactor doubler output
The frequency of signal is 10GHz, and the centre frequency of the second bandpass filter is 10GHz.
5. a kind of broadband Low phase noise apparatus for frequency synthesizing as claimed in claim 1, it is characterised in that first VCO
The reference frequency output of device is 6~9GHz, and the reference frequency output of the second voltage controlled oscillator is 9~12GHz.
6. a kind of broadband Low phase noise apparatus for frequency synthesizing as claimed in claim 1, it is characterised in that the directional coupler
Frequency range is 6~12GHz.
7. a kind of broadband Low phase noise apparatus for frequency synthesizing as claimed in claim 1, it is characterised in that second frequency mixer with
The connected one end incoming frequency scope of directional coupler is 6~12GHz, occurs one end input frequency that circuit is connected with point-frequency signal
Rate is 5GHz or 10GHz, and one end reference frequency output being connected with the 4th either-or switch is 0.2~5.2GHz.
8. a kind of broadband Low phase noise apparatus for frequency synthesizing as claimed in claim 1, it is characterised in that first frequency mixer with
The connected one end incoming frequency scope of 4th either-or switch is 4.8~5.2GHz, occurs circuit is connected one with point-frequency signal
End incoming frequency is 2.5GHz, and one end reference frequency output being connected with the 3rd either-or switch is 2.3~2.7GHz.
9. a kind of broadband Low phase noise apparatus for frequency synthesizing as claimed in claim 1, it is characterised in that first two-divider
Incoming frequency scope is 0.2~3GHz, and reference frequency output is 0.1~1.5GHz.
10. a kind of broadband Low phase noise apparatus for frequency synthesizing as claimed in claim 1, it is characterised in that the decimal frequency divider
Incoming frequency scope is 0.1~1.5GHz, and reference frequency output is 0.1GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710251274.1A CN107196653B (en) | 2017-04-18 | 2017-04-18 | Broadband low-phase noise frequency synthesizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710251274.1A CN107196653B (en) | 2017-04-18 | 2017-04-18 | Broadband low-phase noise frequency synthesizer |
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| Publication Number | Publication Date |
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| CN107196653A true CN107196653A (en) | 2017-09-22 |
| CN107196653B CN107196653B (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710251274.1A Expired - Fee Related CN107196653B (en) | 2017-04-18 | 2017-04-18 | Broadband low-phase noise frequency synthesizer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968651A (en) * | 2017-11-20 | 2018-04-27 | 北京中创锐科信息技术有限公司 | Broadband signal generator |
| CN111416618A (en) * | 2020-03-24 | 2020-07-14 | 中星联华科技（北京）有限公司 | Clock data recovery method and circuit |
| CN111669196A (en) * | 2019-03-05 | 2020-09-15 | 瑞昱半导体股份有限公司 | Device for processing signals |
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| EP1357667B1 (en) * | 2002-04-23 | 2006-11-02 | Siemens S.p.A. | Frequency synthesizer and transceiver including same |
| CN103762978A (en) * | 2014-01-20 | 2014-04-30 | 东南大学 | Broadband low-phase noise frequency synthesizer without frequency divider based on harmonic mixing |
| CN203632646U (en) * | 2013-12-18 | 2014-06-04 | 中国电子科技集团公司第四十一研究所 | Microwave broadband frequency synthesis module |
| CN105071804A (en) * | 2015-07-23 | 2015-11-18 | 中国电子科技集团公司第四十一研究所 | Low phase noise wideband microwave local oscillator source circuit and realization method thereof |
| CN205051680U (en) * | 2015-09-30 | 2016-02-24 | 中星联华科技（北京）有限公司 | Frequency source generator |
| CN105553475A (en) * | 2015-12-18 | 2016-05-04 | 中国电子科技集团公司第四十一研究所 | High frequency point frequency source synthetic circuit based on digital frequency division and harmonic frequency mixing |
| CN105978562A (en) * | 2016-05-12 | 2016-09-28 | 中国电子科技集团公司第四十研究所 | Ultra-low phase noise and ultrahigh frequency resolution high-frequency narrowband synthesis source circuit and method |
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2017
- 2017-04-18 CN CN201710251274.1A patent/CN107196653B/en not_active Expired - Fee Related
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| EP1357667B1 (en) * | 2002-04-23 | 2006-11-02 | Siemens S.p.A. | Frequency synthesizer and transceiver including same |
| CN203632646U (en) * | 2013-12-18 | 2014-06-04 | 中国电子科技集团公司第四十一研究所 | Microwave broadband frequency synthesis module |
| CN103762978A (en) * | 2014-01-20 | 2014-04-30 | 东南大学 | Broadband low-phase noise frequency synthesizer without frequency divider based on harmonic mixing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968651A (en) * | 2017-11-20 | 2018-04-27 | 北京中创锐科信息技术有限公司 | Broadband signal generator |
| CN107968651B (en) * | 2017-11-20 | 2021-12-17 | 成都中创锐科信息技术有限公司 | Broadband signal generator |
| CN111669196A (en) * | 2019-03-05 | 2020-09-15 | 瑞昱半导体股份有限公司 | Device for processing signals |
| CN111669196B (en) * | 2019-03-05 | 2021-07-16 | 瑞昱半导体股份有限公司 | Device for processing signals |
| CN111416618A (en) * | 2020-03-24 | 2020-07-14 | 中星联华科技（北京）有限公司 | Clock data recovery method and circuit |
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