CN203632646U - Microwave broadband frequency synthesis module - Google Patents
Microwave broadband frequency synthesis module Download PDFInfo
- Publication number
- CN203632646U CN203632646U CN201320839423.3U CN201320839423U CN203632646U CN 203632646 U CN203632646 U CN 203632646U CN 201320839423 U CN201320839423 U CN 201320839423U CN 203632646 U CN203632646 U CN 203632646U
- Authority
- CN
- China
- Prior art keywords
- frequency
- output port
- switching circuit
- input
- end mouth
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The utility model provides a microwave broadband frequency synthesis module. The microwave broadband frequency synthesis module comprises an input reference signal (1), an input reference signal (2), a phase discriminator (3), a loop filter (4), a linear adjusting circuit (5), a switch circuit (6), a VCO (7), a VCO (8), a coupler (9), a radio frequency amplifier (10), a radio frequency amplifier (11), a frequency divider (12), a switch circuit (13), a frequency divider (14), a frequency divider (15), a switch circuit (16), a low pass filter (17), a low pass filter (18), a switch circuit (19), a frequency mixer (20), a band pass filter (21), a switch circuit (22), an intermediate frequency amplifier (23), a control unit (24) and a power supply module (25). By adopting the above scheme, the coverage range of the output frequency of a phase-locked loop can reach 5 to 12 GHz, and the coverage range further exceeds the output frequency range of a conventional frequency synthesizer.
Description
Technical field
The utility model belongs to Microwave Wideband Frequence Synthesis Technology field, in particular a kind of microwave broadband frequency synthesis module.
Background technology
Follow the develop rapidly of measuring technique, the measurement of various sophisticated signals more and more needs high performance measuring instrument, measuring range, the frequency accuracy of people to various measuring instruments proposes more and more higher requirement, and determining a design that key technology is exactly local vibration source circuit of measuring instrument performance, therefore people constantly manage to improve the performance in local oscillation signal source in design.Local vibration source circuit is generally realized by frequency synthesizer, and it should have, and frequency range is wide, the high and low feature such as make an uproar mutually of frequency.
Frequency synthesis technique has much at present, but its basic comprising is all a phase-locked loop circuit, and phase-locked loop circuit is mainly made up of parts such as phase discriminator, loop filter, voltage controlled oscillator and frequency dividers.In circuit design, first the output signal of voltage controlled oscillator is passed through to frequency divider frequency division, then input phase discriminator and reference signal carries out phase demodulation, form again the tuning voltage of voltage controlled oscillator through loop filter, adjust the output signal frequency of voltage controlled oscillator, in the time that the signal after frequency division is consistent with reference signal, it is stable that output signal keeps.By adjusting the frequency dividing ratio of frequency converter, just can obtain the output signal of different frequency.For the frequency of microwave section, in order to reduce the phase noise of output signal, can not there is too high frequency dividing ratio, therefore the mode that adopts phase-locked loop circuit to combine with heterodyne circuit, the output signal of voltage controlled oscillator and another reference signal mixing are become to lower frequency, then carry out frequency division, so just can obtain the signal of pure Du Genggao, in order to widen the frequency range of output signal, the reference signal of input mixer must be variable.In addition, the precision of output signal is relevant with the precision of reference signal, in order to improve the precision of output signal, can allow the reference signal of phase discriminator change with very little stepping amount, realizes the output signal of high accuracy.
Prior art has the deficiency of following three aspects:
One: the output signal frequency of frequency synthesizer is not high, and frequency range is narrow, can not meet the frequency requirement of local vibration source, some circuit are in order to reach wider reference frequency output, select circuit combination to realize with multiple phase-locked loop circuits and switch, the circuit structure design complexity that this way is required, has increased circuit space and cost, debugging work load strengthens thereupon, is unfavorable for research and development and the production work in later stage.
Its two: the frequency synthesizer having can reach the frequency requirement of local vibration source, but has the problems such as phase noise is poor, stepping amount is inadequate, has affected the performance index of complete machine.
Its three: the frequency synthesizer circuit that designs high band like this, often whole frequency synthesizer circuit is made to a microwave components, encased whole assembly with shielding box, only reserve input and output signal port, can avoid like this impact of space radiation and signal attenuation, ensure signal quality.But because whole circuit is in shielding box, and adopt a lot of microwave circuits, exist equally debug difficulties, high in cost of production problem.
Therefore, there is defect in prior art, needs to improve.
Utility model content
Technical problem to be solved in the utility model is for the deficiencies in the prior art, and a kind of microwave broadband frequency synthesis module is provided.
The technical solution of the utility model is as follows:
A kind of microwave broadband frequency synthesis module, by the first input reference signal (1), the second input reference signal (2), phase discriminator (3), loop filter (4), linear regulating circuit (5), switching circuit (6), VCO(7), VCO(8), switching circuit (9), coupler (10), radio frequency amplifier (11), radio frequency amplifier (12), frequency divider (13), switching circuit (14), frequency divider (15), frequency divider (16), switching circuit (17), low pass filter (18), low pass filter (19), switching circuit (20), frequency mixer (21), band pass filter (22), switching circuit (23), intermediate frequency amplifier (24), control unit (25), power module (26) composition, wherein the output port of the first input reference signal (1) is connected with the first input end mouth of phase discriminator (3), the 3rd output port of phase discriminator (3) is connected with the first input end mouth of loop filter (4), the second output port of loop filter (4) is connected with the input port of linear regulating circuit (5), the output port of linear regulating circuit (5) is connected with the first input end mouth of switching circuit (6), second output port and VCO(7 of switching circuit (6)) first input end mouth be connected, the 3rd output port and VCO(8 of switching circuit (6)) first input end mouth be connected, VCO(7) the second output port is connected with the second input port of switching circuit (9), VCO(8) the second output port is connected with the 3rd input port of switching circuit (9), the first output port of switching circuit (9) is connected with the first input end mouth of coupler (10), the second output port of coupler (10) is connected with the first input end mouth of radio frequency amplifier (11), the 3rd output port of coupler (10) is connected with the first input end mouth of radio frequency amplifier (12), the second output port of radio frequency amplifier (12) is connected with the first input end mouth of frequency divider (13), the second output port of frequency divider (13) is connected with the first input end mouth of switching circuit (14), the second output port of switching circuit (14) is connected with the first input end mouth of frequency divider (15), the 3rd output port of switching circuit (14) is connected with the first input end mouth of switching circuit (17), the second output port of frequency divider (15) is connected with the first input end mouth of frequency divider (16), the second output port of frequency divider (16) is connected with the 3rd input port of switching circuit (23), the second output port of switching circuit (17) is connected with the first input end mouth of low pass filter (18), the second output port of low pass filter (18) is connected with the second input port of switching circuit (20), the 3rd output port of switching circuit (17) is connected with the first input end mouth of low pass filter (19), the second output port of low pass filter (19) is connected with the 3rd input port of switching circuit (20), the first output port 1 of switching circuit (20) is connected with the second input port of frequency mixer (21), the output port of input reference signal (2) is connected with the first input end mouth of band pass filter (22), the second output port of band pass filter (22) is connected with the first input end mouth of frequency mixer (21), the 3rd output port of frequency mixer (21) is connected with the second input port of switching circuit (23), the first output port of switching circuit (23) is connected with the first input end mouth of intermediate frequency amplifier (24), the second output port of intermediate frequency amplifier (24) is connected with the second input port of phase discriminator (3).
Adopt such scheme: the mode of the two VCO that 1, adopt in circuit, makes the output frequency coverage of phase-locked loop can reach 5～12GHz, considerably beyond the reference frequency output of existing frequency synthesizer; 2, whole local oscillator module adopts the structure of PXI bus 3U size, is realized by 3 common circuit boards, has avoided the mode of microwave components in the past with the combination of PCB circuit, has saved circuit cost and design space, has also facilitated circuit debugging.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
As shown in Figure 1, the present invention overcomes the deficiencies in the prior art, the wideband frequency combiner circuit of design can produce the frequency sweep local vibration source of high stable, this combiner circuit is simple in structure, stability is strong, by the frequency reducing mode of superheterodyne circuit, effectively reduce loop frequency-dividing ratio, thereby improved the ratio of making an uproar mutually of local oscillation signal.Meanwhile, circuit exists two VCO, selects different VCO to participate in frequency synthesis by switching circuit, has greatly widened the scope of the output local oscillation signal of frequency synthesizer circuit, and its frequency range can reach 5GHz---12GHz.In addition, phase demodulation reference signal obtains by Digital Sweep technology, and this makes local vibration source signal have enough little stepping amount, and minimum frequency stepping can reach 1Hz.Whole local oscillator module is realized by 3 PCB circuit board compositions, has broken the mode of the PCB circuit board that microwave band frequency synthesizer circuit adopts in the past and the combination of VCO microwave part, and method for designing novelty, has the circuit debugging of convenience, cost-effective advantage.
Frequency synthesizer circuit structure as shown in the figure, the present invention is by the first input reference signal 1, the second input reference signal 2, phase discriminator 3, loop filter 4, linear regulating circuit 5, switching circuit 6, VCO7, VCO8, switching circuit 9, coupler 10, radio frequency amplifier 11, radio frequency amplifier 12, frequency divider 13, switching circuit 14, frequency divider 15, frequency divider 16, switching circuit 17, low pass filter 18, low pass filter 19, switching circuit 20, frequency mixer 21, band pass filter 22, switching circuit 23, intermediate frequency amplifier 24, control unit 25, power module 26 forms.
Wherein the output port of the first input reference signal 1 is connected with the input port 1 of phase discriminator 3, the output port 3 of phase discriminator 3 is connected with the input port 1 of loop filter 4, the output port 2 of loop filter 4 is connected with the input port of linear regulating circuit 5, the output port of linear regulating circuit 5 is connected with the input port 1 of switching circuit 6, the output port 2 of switching circuit 6 is connected with the input port 1 of VCO7, the output port 3 of switching circuit 6 is connected with the input port 1 of VCO8, VCO7 output port 2 is connected with the input port 2 of switching circuit 9, VCO8 output port 2 is connected with the input port 3 of switching circuit 9, the output port 1 of switching circuit 9 is connected with the input port 1 of coupler 10, the output port 2 of coupler 10 is connected with the input port 1 of radio frequency amplifier 11, the output port 3 of coupler 10 is connected with the input port 1 of radio frequency amplifier 12, the output port 2 of radio frequency amplifier 12 is connected with the input port 1 of frequency divider 13, the output port 2 of frequency divider 13 is connected with the input port 1 of switching circuit 14, the output port 2 of switching circuit 14 is connected with the input port 1 of frequency divider 15, the output port 3 of switching circuit 14 is connected with the input port 1 of switching circuit 17, the output port 2 of frequency divider 15 is connected with the input port 1 of frequency divider 16, the output port 2 of frequency divider 16 is connected with the input port 3 of switching circuit 23, the output port 2 of switching circuit 17 is connected with the input port 1 of low pass filter 18, the output port 2 of low pass filter 18 and switching circuit 20 input port 2 be connected, the output port 3 of switching circuit 17 is connected with the input port 1 of low pass filter 19, the output port 2 of low pass filter 19 and switching circuit 20 input port 3 be connected, switching circuit 20 output port 1 be connected with the input port 2 of frequency mixer 21, the output port of input reference signal 2 is connected with the input port 1 of band pass filter 22, the output port 2 of band pass filter 22 is connected with the input port 1 of frequency mixer 21, the output port 3 of frequency mixer 21 is connected with the input port 2 of switching circuit 23, the output port 1 of switching circuit 23 is connected with the input port 1 of intermediate frequency amplifier 24, the output port 2 of intermediate frequency amplifier 24 is connected with the input port 2 of phase discriminator 3, control unit 25 is connected with each parts corresponding port with power module 26.
The first input reference signal 1 is produced by the phase-locked loop of digital frequency division, be used as the reference frequency of local oscillator loop phase discriminator 3, its feature is to make an uproar mutually lowly, and stepping is little, reference frequency output is 20～50MHz, and it makes the minimum step frequency of local vibration source signal can reach 1Hz; Input reference signal 2 is also to be produced by phase-locked loop, its output is the reference frequency within the scope of tool 200-220MHz, it carries out mixing by mixing mode and local oscillation signal, has reduced the frequency dividing ratio of local oscillator loop, has effectively improved the phase noise performance of local oscillator output signal.The effect of phase discriminator 3 is that input reference signal 1 and the signal of local oscillation signal after frequency division, frequency reducing are carried out to phase bit comparison, and loop filter 4 can carry out filtering to the output voltage of phase discriminator 3, reduces the impact of ripple voltage on output signal; Linear regulating circuit 5 is adjusted output voltage, makes it meet the input voltage requirement of voltage controlled oscillator; It is phase-locked that switching circuit 6 is used for selecting different VCO to carry out, and it is that supply voltage by controlling two VCO and the selection of output channel realize, and it is enough high that the isolation of switching circuit is wanted, the pure of assurance output signal; The output frequency difference of VCO1, two voltage controlled oscillators of VCO2, the coverage that both combine can reach 5～12GHz, selects different VCO to participate in frequency synthesis by switching circuit, reaches the object of widening frequency range; Because output signal frequency is higher, in order to reduce power loss, coupler 10 has adopted the mode of microstrip line coupling, and output signal is divided into two-way, leads up to radio frequency amplifier 10 as local oscillation signal output, and an other road feedback is used as frequency synthesis; The effect of radio frequency amplifier 12 is that the output signal of coupler 10 is amplified to the required power level of frequency divider 13; Frequency divider 15,16 completes respectively 1/8 frequency division, 1/16 frequency division of input signal, signal after frequency division enters phase discriminator 3, due to the too high signal to noise ratio that can affect output signal of frequency dividing ratio, therefore in loop, adopted another phase-locked scheme, by the selection of switching circuit 14,17,20,23, local oscillation signal after 2 frequency divisions is carried out to mixing with the harmonic wave of input reference signal 2 respectively after low pass filter 18,19, low pass filter 18,19 can filtering frequency division output signal in contained high-frequency signal, improve signal quality, reduce and disturb; The effect of frequency mixer 21 is to realize subtracting each other of input radio frequency signal, and the signal after the harmonic wave of reference signal 2 and local oscillation signal frequency division carries out difference frequency, and the difference frequency signal of output enters phase discriminator 3 and compares phase demodulation with input reference signal 1; Band pass filter 22 carries out filtering to the reference signal 2 of input, removes the spurious signal in input signal, in order to avoid these signals and harmonic wave thereof produce modulated interferer to local oscillation signal; The effect of intermediate frequency amplifier 24 is that the output signal of frequency mixer 21 is amplified to improve signal level, to meet the job requirement of phase discriminator 3.Control unit 25 calculates the local vibration source frequency and the reference frequency value that need according to the frequency of system setting, and control reference signal 1 and reference signal 2 is exported corresponding signal, synthetic for local frequency, control switch circuit and VCO power circuit select different VCO to participate in frequency synthesis simultaneously; Power module 26 is for all parts provides direct-current working volts, mainly contains+15V ,-5V ,+5V.
Operation principle of the present invention is as follows: first switch on power, calculate the frequency values of local frequency value and corresponding reference signal 1 and the reference signal 2 of needs according to the frequency values arranging, etc. the output frequency of reference signal 1 and reference signal 2 stable after, select corresponding VCO to participate in frequency synthesis by the output local frequency value of needs again, and set switching circuit, start the frequency synthesis work of local oscillator loop.The output of VCO is divided into two-way after coupler 10, export as output signal on one tunnel, amplify through radio frequency amplifier 12 on another road, then pass through successively the frequency conversion of frequency divider 15, frequency divider 16, enter phase discriminator and carry out phase demodulation, make to export local frequency and become the frequency values needing, but now because frequency dividing ratio is too high, cause the phase noise of local oscillation signal to worsen.Now control switch circuit 14,17,20,23 again, allow local oscillation signal with carry out mixing with the harmonic wave of reference signal 2 of input, the difference frequency signal of output is after intermediate frequency amplifier 24, carry out phase demodulation with input reference signal 1, form the tuning voltage of VCO through loop filter, control corresponding VCO output local oscillation signal, the local oscillation signal of output just has reasonable phase noise like this.Because the output signal range of VCO is wider, for the loop losing lock that prevents that VCO from causing while switching, can add pressure limiting circuit at tuning voltage place, tuning voltage is kept within the specific limits.In the time that the output signal of VCO equals the local frequency value of needs, phase-locked loop enters normal operating conditions and guarantees stable output frequency.
Project organization of the present invention is as follows: this design adopts PCB to realize completely, and whole circuit is made up of 3 block lengths × wide printed board for 160mm × 100mm.Because the signal frequency in circuit is up to 12GHz, in order to reduce the loss of signal, whole circuit board has adopted special printed board material to make, and the circuit of microwave section is adopted to microwave circuit design of Simulation as filter, coupler, mixer etc., go out the thickness of required width, thickness and the each dielectric layer of PCB of holding wire by simulation calculation, on pcb board, realized out the circuit of whole microwave part.In order to prevent signal cross-talk, all printed boards have all added shielding box, the shielding box body of every printed board adopts Dual-layer, multi-groove structure, by the via hole between circuit board, circuit board is clipped in the middle, realize the sealing of total, both effectively isolate the space radiation of electromagnetic signal, facilitated again the abundant ground connection nearby of radiofrequency signal, avoided the phase mutual interference of microwave signal in shielding box inside.Output local oscillation signal and input reference signal all connect by SMA cable connector, and have adopted conductive fabric sealing means in local oscillation signal joint, prevent the space radiation of local oscillation signal.
Adopt such scheme: the mode of the two VCO that 1, adopt in circuit, makes the output frequency coverage of phase-locked loop can reach 5～12GHz, considerably beyond the reference frequency output of existing frequency synthesizer; 2, local oscillator module adopts the structure of PXI bus 3U size, occupy the width of 2 grooves (4mm), there is volume little, the feature of easy accessibility, and whole module is made up of 3 circuit boards, by different functional circuits separately, every circuit board is all added with shielding box, has effectively avoided mutually crosstalking of signal between each frequency range.And the local oscillation circuit of microwave section is realized out on PCB circuit board, this method for designing thinking novelty, and saved circuit cost, also facilitate debugging work.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of the utility model claims.
Claims (1)
1. a microwave broadband frequency synthesis module, it is characterized in that, by the first input reference signal (1), the second input reference signal (2), phase discriminator (3), loop filter (4), linear regulating circuit (5), switching circuit (6), VCO(7), VCO(8), switching circuit (9), coupler (10), radio frequency amplifier (11), radio frequency amplifier (12), frequency divider (13), switching circuit (14), frequency divider (15), frequency divider (16), switching circuit (17), low pass filter (18), low pass filter (19), switching circuit (20), frequency mixer (21), band pass filter (22), switching circuit (23), intermediate frequency amplifier (24), control unit (25), power module (26) composition, wherein the output port of the first input reference signal (1) is connected with the first input end mouth of phase discriminator (3), the 3rd output port of phase discriminator (3) is connected with the first input end mouth of loop filter (4), the second output port of loop filter (4) is connected with the input port of linear regulating circuit (5), the output port of linear regulating circuit (5) is connected with the first input end mouth of switching circuit (6), second output port and VCO(7 of switching circuit (6)) first input end mouth be connected, the 3rd output port and VCO(8 of switching circuit (6)) first input end mouth be connected, VCO(7) the second output port is connected with the second input port of switching circuit (9), VCO(8) the second output port is connected with the 3rd input port of switching circuit (9), the first output port of switching circuit (9) is connected with the first input end mouth of coupler (10), the second output port of coupler (10) is connected with the first input end mouth of radio frequency amplifier (11), the 3rd output port of coupler (10) is connected with the first input end mouth of radio frequency amplifier (12), the second output port of radio frequency amplifier (12) is connected with the first input end mouth of frequency divider (13), the second output port of frequency divider (13) is connected with the first input end mouth of switching circuit (14), the second output port of switching circuit (14) is connected with the first input end mouth of frequency divider (15), the 3rd output port of switching circuit (14) is connected with the first input end mouth of switching circuit (17), the second output port of frequency divider (15) is connected with the first input end mouth of frequency divider (16), the second output port of frequency divider (16) is connected with the 3rd input port of switching circuit (23), the second output port of switching circuit (17) is connected with the first input end mouth of low pass filter (18), the second output port of low pass filter (18) is connected with the second input port of switching circuit (20), the 3rd output port of switching circuit (17) is connected with the first input end mouth of low pass filter (19), the second output port of low pass filter (19) is connected with the 3rd input port of switching circuit (20), the first output port 1 of switching circuit (20) is connected with the second input port of frequency mixer (21), the output port of input reference signal (2) is connected with the first input end mouth of band pass filter (22), the second output port of band pass filter (22) is connected with the first input end mouth of frequency mixer (21), the 3rd output port of frequency mixer (21) is connected with the second input port of switching circuit (23), the first output port of switching circuit (23) is connected with the first input end mouth of intermediate frequency amplifier (24), the second output port of intermediate frequency amplifier (24) is connected with the second input port of phase discriminator (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320839423.3U CN203632646U (en) | 2013-12-18 | 2013-12-18 | Microwave broadband frequency synthesis module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320839423.3U CN203632646U (en) | 2013-12-18 | 2013-12-18 | Microwave broadband frequency synthesis module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632646U true CN203632646U (en) | 2014-06-04 |
Family
ID=50819081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320839423.3U Expired - Fee Related CN203632646U (en) | 2013-12-18 | 2013-12-18 | Microwave broadband frequency synthesis module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203632646U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104363013A (en) * | 2014-09-02 | 2015-02-18 | 中国科学院国家授时中心 | Frequency voltage converter with low additional noise |
| CN107196653A (en) * | 2017-04-18 | 2017-09-22 | 中国电子科技集团公司第四十研究所 | A kind of broadband Low phase noise apparatus for frequency synthesizing |
| CN107834997A (en) * | 2017-12-08 | 2018-03-23 | 成都前锋电子仪器有限责任公司 | A kind of filtering gain circuit |
| 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 |
-
2013
- 2013-12-18 CN CN201320839423.3U patent/CN203632646U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104363013A (en) * | 2014-09-02 | 2015-02-18 | 中国科学院国家授时中心 | Frequency voltage converter with low additional noise |
| CN104363013B (en) * | 2014-09-02 | 2018-06-08 | 中国科学院国家授时中心 | A kind of FV convertor of low additional noise |
| CN107196653A (en) * | 2017-04-18 | 2017-09-22 | 中国电子科技集团公司第四十研究所 | A kind of broadband Low phase noise apparatus for frequency synthesizing |
| CN107196653B (en) * | 2017-04-18 | 2020-04-21 | 中国电子科技集团公司第四十一研究所 | Broadband low-phase noise frequency synthesizer |
| 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 |
| CN107834997A (en) * | 2017-12-08 | 2018-03-23 | 成都前锋电子仪器有限责任公司 | A kind of filtering gain circuit |
| CN107834997B (en) * | 2017-12-08 | 2024-02-06 | 成都前锋电子仪器有限责任公司 | Filtering gain circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105187060B (en) | The phase-locked loop circuit and its implementation of a kind of low phase noise | |
| CN108736889B (en) | Low spurious/low phase noise frequency synthesizer | |
| CN203632646U (en) | Microwave broadband frequency synthesis module | |
| CN105071804B (en) | A kind of Low phase noise broadband microwave local oscillator source circuit and its implementation method | |
| CN103762978A (en) | Broadband low-phase noise frequency synthesizer without frequency divider based on harmonic mixing | |
| CN102332914B (en) | C-waveband frequency comprehensive generator with low phase noise | |
| CN102684716A (en) | 30-3000 MHz ultrashort wave receiver | |
| CN103607215B (en) | A kind of apparatus and method realizing spectrum analyzer spread spectrum function | |
| CN105245224A (en) | Low-phase noise microwave local oscillation generating device and method | |
| CN105049035A (en) | Multi-mode small low phase noise broadband dot frequency synthetic circuit and method | |
| CN109450445A (en) | A kind of variable loop bandwidth frequency synthesizer, system and method | |
| CN108055035B (en) | Broadband frequency extension device of photoelectric oscillator | |
| CN203554416U (en) | X-waveband FM (Frequency Modulation) CW (Continuous Wave) radar frequency comprehensive generator | |
| CN103888134A (en) | Frequency synthesizer capable of achieving low phase noise, low stray and quick change | |
| CN104836581A (en) | High-performance broadband frequency source generation circuit employing multi-harmonic reference, and generation method | |
| CN117081583B (en) | Frequency source for improving phase noise | |
| CN202565256U (en) | 30-to-3000-megahertz ultra-short wave receiving machine | |
| CN203596813U (en) | Low-phase-noise frequency synthesizer | |
| CN202978896U (en) | Combined broadband rapid frequency hopping source | |
| CN201479116U (en) | Combined frequency hopping synthesizer | |
| CN103634024B (en) | A kind of apparatus and method realizing signal analysis instrument spread spectrum function | |
| CN113162617B (en) | Low-phase-noise X-band frequency source and modulation method thereof | |
| CN203608181U (en) | Frequency synthesizer | |
| CN104702279A (en) | Frequency synthesizer of phase-locked loop | |
| CN105119599A (en) | Broadband low-stepping high-speed frequency synthesizer based on DDS (Direct Digital Synthesizer) and PLL (Phase Locked Loop) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190225 Address after: 266000 No. 98 Xiangjiang Road, Huangdao District, Qingdao City, Shandong Province Patentee after: China Electronics Technology Instrument and Meter Co., Ltd. Address before: 266000 No. 98 Xiangjiang Road, Qingdao economic and Technological Development Zone, Shandong Patentee before: The 41st Institute of CETC |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20201218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |