CN1027780C - Microwave frequency division phase lock dielectric oscillator - Google Patents
Microwave frequency division phase lock dielectric oscillator Download PDFInfo
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- CN1027780C CN1027780C CN 93103013 CN93103013A CN1027780C CN 1027780 C CN1027780 C CN 1027780C CN 93103013 CN93103013 CN 93103013 CN 93103013 A CN93103013 A CN 93103013A CN 1027780 C CN1027780 C CN 1027780C
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Abstract
The present invention relates to a microwave frequency-dividing and phase-locking dielectric oscillator which is designed to improve working frequency, stabilize precision and lower noise. The present invention is composed of a crystal resonator, a phase detector, an active low pass filter, a voltage control oscillator and an N divider, wherein a microwave frequency output by the voltage control oscillator is directly divided for N times, a low frequency signal is obtained and compared with a reference frequency in the phase detector, and an error voltage is output and stabilized in frequency by the voltage control oscillator after passing through the active low pass filter. An FET medium oscillator is used as the voltage control oscillator, and a frequency-dividing and phase-locking loop is partially fabricated on a micro strip piece of 50*40*1mm<3>. In addition, the working frequency is from 3.8 to 9GHz, and the frequency-stabilizing precision is (+/-)3*10<-6>.
Description
The present invention relates to a kind of electro coupled oscillator, relate to a kind of microwave frequency division phase lock dielectric oscillator or rather.
The microwave local oscillator that is used as local oscillator in microwave transmitting and receiving equipment is the critical component of microwave equipment, and it is particularly important to develop the microwave oscillator with high steady accuracy, low noise, low-power consumption.
Microwave frequency division phase lock dielectric oscillator is a kind of microwave oscillator that phase-locked loop is realized high steady accuracy that adds, and higher operating frequency and steady accurate degree of frequency is arranged and can modulate sub baseband sinal.The frequency division phase-locked oscillator of prior art generally adopts harmonic mixing technology or frequency doubling technology to make.
The frequency division phase-locked oscillator of employing harmonic mixing technology comprises crystal resonator B, crystal resonator A, n frequency multiplier 21, frequency mixer 22, Fractional-N frequency device 23, phase discriminator 24, active low-pass filter 25, voltage controlled oscillator 26 as shown in Figure 1.About crystal resonator A(frequency of oscillation 100MHz) output frequency adds to n frequency multiplier 21, its harmonic frequency in frequency mixer 22 with the output frequency mixing of voltage controlled oscillator 26, obtain lower frequency, be added to an input of phase discriminator 24 through Fractional-N frequency device 23 frequency divisions for N time; Produce another input that the reference data frequency is added to phase discriminator 24 by crystal resonator B, phase discriminator is the frequency and the phase place of two input signals relatively, the error signal that output is directly proportional with two signal phase differences, form the input formation frequency dividing phase-locked loop road that direct-current control voltage is added to voltage controlled oscillator 26, voltage controlled oscillator 26 output high-frequency oscillation signals through active low-pass filter 25 again.The steady accurate degree of frequency of this technology depends primarily on crystal oscillator A, and it adopts high-frequency crystal (about 100MHz).Its steady accurate degree of frequency is low, takes the M subharmonic again, therefore utilizes the oscillator of this fabrication techniques, and its steady accurate degree of frequency can only reach 10
-5Magnitude.
Adopting the frequency division phase-locked oscillator of frequency doubling technology, is that to carry out frequency division on lower frequency phase-locked, is converted to high-frequency signal by frequency multiplier again.It comprises crystal resonator, phase discriminator, active low-pass filter, Fractional-N frequency device, voltage controlled oscillator and n frequency multiplier.Voltage controlled oscillator output signal obtains required operating frequency through n frequency multiplier frequency multiplication.Owing to adopt frequency doubling technology, power supply conversion efficiency is low, therefore noise objective can descend 201gN.
The frequency division phase-locked oscillator of above-mentioned two kinds of technology exists steady accurate degree of frequency and the low shortcoming of noise objective, and generally has the deficiency of circuit structure complexity.
Background technology European patent 0218406-A3 " sampling clock generation circuit ", its reference source is vertical, the level or the combination synchronizing signal of vision signal, output is that synchronous with it sampling clock, the effect of circuit are to obtain the clock synchronous with reference source, waveform is a square wave, and operating frequency is very low.
Background technology United States Patent (USP) 4698601 " phase-locked loop " has adopted sampling Phase Lock Technique (with the 1/N pulse sampling of VCO than phase) in the loop, output signal is square wave.Effect is to handle vision signal altogether, and operating frequency is very low, poor reliability, easily losing lock.
Background technology United States Patent (USP) 5079526 " utilizes low-frequency compensation to mix the frequency modulation synthesizer of VCO ", and what relate to is the synthesizer of a kind of DC of carrying out, FM modulation, is mainly used in the duplexing FM radio set communication, and operating frequency is below 1000MHz.
Background technology Chinese patent 87107246 " a kind of waveguide type FEF oscillator " is a kind of FEF oscillator with the waveguide cavity frequency stabilization, though its operating frequency can not have electric demodulation circuit and sub-baseband modulation function at 11GHz, therefore can not make voltage controlled oscillator.
The objective of the invention is to design the microwave frequency division phase lock dielectric oscillator of a kind of operating frequency height, the high and low noise of steady accurate degree of frequency, low-power consumption.
Microwave frequency division phase lock dielectric oscillator of the present invention has saved harmonic mixing and frequency doubling technology, is the direct frequency division phase lock dielectric oscillator of a kind of microwave.Its adopts on microwave frequency directly frequency division phase-locked and make voltage controlled oscillator with dielectric oscillator and realize.Form by crystal resonator, phase discriminator, active low-pass filter, voltage controlled oscillator, Fractional-N frequency device.Crystal resonator output reference reference frequency is added to an input of phase discriminator, the microwave frequency of voltage controlled oscillator is directly delivered to another input of phase discriminator through Fractional-N frequency device frequency division to very low frequency, phase discriminator is two phase of input signals relatively, the error signal that output is directly proportional with two signal phase differences, through active low-pass filter, the input that error voltage is added to voltage controlled oscillator constitutes the realization frequency stabilization of frequency dividing phase-locked loop road, voltage controlled oscillator is directly exported required microwave operational frequencies, described voltage controlled oscillator is a dielectric voltage controlled oscillator, and can realize the sub baseband sinal modulation.
Describe technology of the present invention in detail below in conjunction with the embodiment accompanying drawing
The direct frequency division phase lock dielectric oscillator theory diagram of accompanying drawing 2. microwaves of the present invention
The direct frequency division phase lock dielectric oscillator of accompanying drawing 3. microwaves of the present invention is implemented circuit diagram
The direct frequency division phase lock dielectric oscillator micro belt board of accompanying drawing 4. microwaves of the present invention export structure schematic diagram
The direct frequency division phase lock dielectric oscillator box body of accompanying drawing 5. microwaves of the present invention profile schematic diagram
The direct frequency division phase lock dielectric oscillator box body of accompanying drawing 6. microwaves of the present invention internal structure schematic diagram
Referring to accompanying drawing 2,1 is voltage controlled oscillator among the figure, and 2 is the Fractional-N frequency device, and 3 is phase discriminator, and 4 is active low-pass filter, and 5 is crystal resonator.The required operating frequency of voltage controlled oscillator 1 output, the embodiment operating frequency is 3.8GHz-9GHz, and power output is 5mW-120mW, and steady accurate degree of frequency is ± 3 * 10
6, baseband noise is 10MHz-1MHz time≤5PW; 1MHz-0.06MHZ time≤10PW, 0 ℃-+50 ℃ of working temperatures.
Referring to accompanying drawing 3, embodiment illustrated in fig. 3, in the operating frequency range of 3.8GHz-9GHz, phase demodulation frequency is taken as 0.9MHz-2.2MHz, among the figure, IC1, IC2 is respectively 4 frequency dividers, IC3 is 256 frequency dividers, the total points frequency is counted N: 4 * 4 * 256=4096, f/4096 signal frequency behind the frequency division and the output frequency of crystal resonator 5 carry out in phase discriminator IC4 than mutually, the phase voltage that obtains is delivered to by transport and placing device IC5 and R, the active low-pass filter that C forms, filtering high order harmonic component and noise, deliver at last carry out on the varactor diode circuit of dielectric voltage controlled oscillator 1 voltage-controlled, dielectric voltage controlled oscillator 1 is by power splitter 11, isolator 12 and voltage controlled oscillator 13 are formed, dielectric voltage controlled oscillator 1 is a FET feedback-type dielectric oscillator, and its mode of operation is TE01 δ, and wherein frequency stabilization with the dielectric resonator parameter index is: DIELECTRIC CONSTANT
025～39, Q=7000-10000.
Voltage stabilizing circuit 6 will import-and the 18V general supply is converted to one tunnel-15V for crystal resonator voltage controlled oscillator 1 and transport and placing device IC5, and another road-5V is for IC1-IC4.
This circuit structure is integrated owing to being convenient to miniaturization, seriation and microwave, has embodied the developing direction of this technology.
Circuit shown in Figure 3 all is produced on DIELECTRIC CONSTANT except that 1,6
0=9.6, be of a size of 50 * 40 * 1(mm)
3The composite microband sheet on, and employing surface mount and high-frequency microstrip technology, transmission line impedance is by 50 Ω design, in order not influence main output, to guarantee to have less loop input power to be connected with best level, input, the output of circuit are added with match circuit, are added with directional coupler between the higher IC1 of operating frequency, IC2.
Because the parameter of active low-pass filter directly influences noise objective, therefore to select suitable numerical value, to obtain the optimum noise index to different operating frequencies.
Referring to accompanying drawing 4, in order to reduce the traction of external circuit to the voltage controlled oscillator characteristic, circuit output end is added with isolator 12, for the signal input power of 5-10mW is provided to frequency dividing circuit, also is added with power divider 11 at the output of voltage controlled oscillator.R ' is 50 Ω microstrip lines among the figure, VD is a variable capacitance diode, voltage-controlled voltage from active low-pass filter, cause the volume change of variable capacitance diode VD in the dielectric voltage controlled oscillator, and the coupling of electromagnetic field between field-effect transistor F, dielectric resonator T by constituting voltage controlled oscillator 13, variable capacitance diode VD circuit, change frequency of oscillation, thereby realize voltage-controlled.
Referring to accompanying drawing 5, the box body profile of the direct frequency division phase lock dielectric oscillator of microwave is of a size of 90 * 86 * 38(mm) as shown in FIG.
3, wherein 10 is tuning screw, is used to adjust the frequency of voltage controlled oscillator, 20 is the power output seat of oscillator.
Referring to accompanying drawing 6, box body shown in Figure 5 inside, 100 is the dielectric voltage controlled oscillator part.200 is the phase-locked part of frequency division, and its circuit all is produced on the micro belt board.
Advantage of the present invention is: 1) dielectric voltage controlled oscillator directly vibrates on microwave frequency, adopt high Q value Stabilized by Dielectric Resonators in the dielectric oscillator, therefore circuit loaded Q height, noise objective height, 2) crystal resonator of generation reference frequency works in lower frequency (1-5MHz) in this programme, have very high steady accurate degree of frequency, generally can reach 10
-6Magnitude above (0 ℃～+ 50 ℃), it has determined the steady accurate degree of frequency index of this oscillator; 3) to help microwave integrated for this programme, and it is integrated the loop of microlock dielectric oscillator partly can be carried out microwave, makes product miniaturization, seriation, and increases stability; 4) this programme possesses good low side noiseproof feature, is convenient to directly modulate on microwave frequency sub baseband sinal.
The direct frequency division phase lock dielectric oscillator of this microwave can be applicable in the various microwave telecommunication devices.
Claims (2)
1, a kind of microwave frequency division phase lock dielectric oscillator, comprise crystal oscillator, phase discriminator, active low-pass filter, by power splitter, dielectric voltage controlled oscillator and Fractional-N frequency device that isolator and voltage controlled oscillator are formed, described crystal oscillator produces the input that the reference frequency is added to described phase discriminator, the microwave frequency of described dielectric voltage controlled oscillator is directly delivered to another input of phase discriminator through described Fractional-N frequency device frequency division, described phase discriminator output is than phase error signal, the input that adds to described dielectric voltage controlled oscillator through active low-pass filter constitutes the realization frequency stabilization of frequency dividing phase-locked loop road, described dielectric voltage controlled oscillator is directly exported microwave frequency, it is characterized in that:
1) described dielectric voltage controlled oscillator is the feedback-type dielectric voltage controlled oscillator that can realize the sub baseband sinal modulation, form by dielectric resonator, FET field effect transistor, modulation microstrip circuit, power splitter and isolator, the FET tube grid connects 50 Ω matched loads, source electrode connects the coupling microstrip line, and drain electrode provides signal power and supplies output to the Fractional-N frequency device respectively by power splitter and isolator;
2) described dielectric resonator is positioned at the FET fet gate and drain electrode is little leads the way and modulate between microstrip circuit, passes through electromagnetic field couples each other;
3) described modulation microstrip circuit is made of modulation coupled microstrip line connection variable capacitance diode, the variable capacitance diode minus earth, and voltage-controlled voltage and sub baseband sinal are added in the modulation microstrip circuit by match circuit and high resistant line.
2, microwave frequency division phase lock dielectric oscillator according to claim 1, it is characterized in that described dielectric resonator is positioned on the micro belt board, is surrounded the zone that forms by FET field effect transistor microstrip line, power splitter, modulation microstrip line and variable capacitance diode, realize electromagnetic field couples.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93103013 CN1027780C (en) | 1993-03-23 | 1993-03-23 | Microwave frequency division phase lock dielectric oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93103013 CN1027780C (en) | 1993-03-23 | 1993-03-23 | Microwave frequency division phase lock dielectric oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1078335A CN1078335A (en) | 1993-11-10 |
| CN1027780C true CN1027780C (en) | 1995-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93103013 Expired - Fee Related CN1027780C (en) | 1993-03-23 | 1993-03-23 | Microwave frequency division phase lock dielectric oscillator |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091111C (en) * | 1998-11-09 | 2002-09-18 | 中国人民解放军军事医学科学院放射医学研究所 | Structure and usage of antisense oligonucleotide for treating diseases correlative to hepatitis C virus |
| EP1717512A4 (en) | 2003-12-19 | 2007-03-07 | Hitachi Chemical Co Ltd | Backlight device and liquid crystal display |
| US20080068098A1 (en) * | 2005-02-07 | 2008-03-20 | Takeshi Fujii | Vco Device, and Tuner, Broadcast Receiver and Mobile Telephone Using the Same |
| CN102163970A (en) * | 2011-01-25 | 2011-08-24 | 吴惠彬 | Phase-locked dielectric resonator oscillator with low phase noise at microwave frequency band |
| CN102332896B (en) * | 2011-08-18 | 2014-01-15 | 南京誉葆科技有限公司 | Embedded anti-load frequency-stabilizing source with low phase noise and design method thereof |
| CN106793234A (en) * | 2016-11-28 | 2017-05-31 | 广东美的厨房电器制造有限公司 | Control circuit, semiconductor microwave oven and control method |
| CN110830040B (en) * | 2019-10-31 | 2023-04-14 | 西安空间无线电技术研究所 | U-frequency-band microwave direct modulation system |
| CN118316439B (en) * | 2024-06-11 | 2024-08-13 | 成都威频科技有限公司 | Dual-medium resonance regeneration frequency division circuit and implementation method |
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1993
- 1993-03-23 CN CN 93103013 patent/CN1027780C/en not_active Expired - Fee Related
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| CN1078335A (en) | 1993-11-10 |
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