CN207819962U - A kind of frequency tunable multiple frequency rate output microwave source - Google Patents
A kind of frequency tunable multiple frequency rate output microwave source Download PDFInfo
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Abstract
The utility model discloses a kind of frequency tunable multiple frequency rates to export microwave source, including low frequency synthetic source, voltage controlled oscillator, double sideband modulation device and frequency multiplier.Solve that high-frequency microwave signal output, output signal broadband, multifrequency signal export, output signal strength is adjustable, flexible adjustment and facilitate miniaturization well.Microwave source uses voltage controlled oscillator and low frequency synthetic source as low-frequency input signal, has the characteristics that adjusting frequency is wide and flexible.Double sideband modulation device generates more sideband modulated signals, and modulating frequency bandwidth sees that signal strength can flexibly be changed by phase difference.Double sideband modulation device output signal passes through frequency multiplier, due to the nonlinear effect of frequency multiplier, exports multiple-frequency signal, and each frequency peak intensity can be adjusted by changing phase difference.
Description
Technical field
The utility model belongs to microwave signal source domain in microwave/millimeter wave technology, and in particular to a kind of frequency is adjustable more
Rate-adaptive pacemaker microwave source.
Background technology
With the development of microwave communication and measuring technique, people are for the flexible adjustment of microwave source, high-frequency, high noise
Requirement than the output of, multi-frequency is higher and higher.Earliest microwave source is microwave tube oscillation source, it includes mainly klystron, backward wave
Pipe and gyrotron.It is excellent that they have that output power, frequency of oscillation are high, frequency spectrum is pure, high-low temperature resistant and Antiradiation ability are strong etc.
Point, but it is complicated, volume is big, operating voltage is high (up to hundreds thousand of volts), using being restricted.
With the appearance of semiconductor diode, ground based on a kind of new microwave source of this technology (solid state microwave oscillation source)
System.Solid state microwave oscillation source is small, light-weight, simple in structure, long lifespan, and operating voltage is only several volts to tens volts, and
Convenient for integrated, but output power is small, and the maximum frequency of oscillation having reached is less than the frequency of microwave tube oscillation source.In order to realize
High-frequency signal exports, and generally requires addition frequency multiplier.
In order to realize and meanwhile multiple-frequency signal export, can use multiple and different frequency microwave sources joint output；Or it utilizes
Microwave device harmonic wave multifrequency exports.But these technical costs are costly and output frequency difficult to realize, frequency difference and output letter
The flexible modulation of number intensity.
Utility model content
The purpose of this utility model is that：With a kind of relatively simple output frequency of method generation and the adjustable multifrequency of intensity
Rate millimeter wave microwave source.
For achieving the above object, technical solution used by the utility model is：A kind of frequency tunable multiple frequency rate is defeated
Go out microwave source, including low frequency synthetic source, voltage controlled oscillator, double sideband modulation device and frequency multiplier, wherein：
The low frequency synthetic source, for generate twice frequency with amplitude the adjustable microwave signal of identical and phase difference, two
Road signal changes signal strength, signal respectively as the input signal of double sideband modulation device intermediate frequency port by adjusting phase difference
Source frequency range 50-400MHz, power bracket 0-15dBm, twice signal phase difference adjustable range 0-180 degree；
The voltage controlled oscillator provides low phase noise and the adjustable microwave signal of frequency, as double sideband modulation device
Assertive evidence input signal, the microwave source output frequency 8-12.5GHz, output power 16dBm, tuning voltage range 0-20V, output work
Rate flatness is less than 3dB；
The double sideband modulation device can pass through modulated medium frequency signal in the case of given assertive evidence and intermediate-freuqncy signal
Phase difference changes output sideband signals intensity, wherein frequency modulation adjusting range 100-500MHz, assertive evidence frequency range 8-18GHz, assertive evidence
Input power 13-18dBm；
The frequency multiplier, for finally realizing broadband, multifrequency output, frequency difference and the adjustable microwave source of intensity；
The microwave source be utilized double sideband modulation device output signal strength can reconcile frequency multiplier nonlinear effect realize it is adjustable
Multifrequency exports.
Wherein, using the nonlinear device of frequency multiplier for the non-linear discharge effect of multitone signals, realize for
The frequency of signal and the amplification of power.
Wherein, it generates the adjustable polygon band signal of frequency by double sideband modulation device and signal strength is adjustable, by adjusting again
The intensity of frequency device input signal difference peak value realizes the output of multi-frequency intensity adjustable signal.
Wherein, which is mainly the nonlinear effect that electronics device in frequency multiplier is utilized.
The principles of the present invention are：
A kind of converter technique and frequency doubling technology applied in heterodyne form, including low frequency synthetic source, a voltage controlled oscillation
Device (VCO), a double sideband modulation device, a frequency multiplier.
Low frequency synthetic source in described, for generate twice frequency with amplitude the adjustable microwave signal of identical and phase difference.
Twice signal realizes double-side band output letter respectively as the input signal of double sideband modulation device assertive evidence port by adjusting phase difference
Number modulation.Signal source frequency adjustable range 50-400MHz, power regulating range 0-15dBm, twice signal phase difference adjustable range
0-180 degree.
Voltage controlled oscillator in described provides low phase noise and the adjustable microwave signal of frequency, as upper side band modulator
Assertive evidence input signal.The microwave source output frequency 8-12.5GHz, output power 16dBm, tuning voltage range 0-20V, output
Power flatness is less than 6dB.
Double sideband modulation device in described can be by modulation in the case of given assertive evidence and IF input signals
Frequency signal phase difference generates the adjustable microwave signal of lower sideband, wherein frequency modulation adjusting range 100-500MHz, assertive evidence frequency range
8-18GHz, assertive evidence input power 13-18dBm.Double sideband modulation device exports electric field signal：
Lower sideband intensity rate：
WhereinAnd ωRFVoltage controlled oscillator output intensity and frequency, B, ωmIt is that low frequency synthesis source input signal is strong with θ
Degree, frequency and phase error, γ are double sideband modulation device phase error.
Frequency multiplier in described realizes broadband, multifrequency output, frequency difference and the adjustable microwave of intensity for finally generating
Source.By taking quadrupler as an example, output signal meets：
Wherein, k is corresponded to and assertive evidence frequency phase-difference kfmThe peak value of frequency.
The advantages of the utility model and good effect are：
(1) the utility model is simple in structure, convenient for miniaturization.
(2) the utility model uses low frequency dual signal output source, output signal frequency and range error is small and twice signal
The flexible precision of phase adjusted is high.
(3) the utility model uses voltage controlled oscillator as assertive evidence signal source, and output signal band is wide, easy to adjust, just
In modularization.
(4) the utility model uses the adjustable polygon band signal of double sideband modulation device output intensity, phase of output signal noise
Low, intermediate frequency and radio frequency adjustable extent are big, and lower sideband intensity can pass through intermediate-freuqncy signal phase difference flexible modulation.
(5) the utility model uses frequency multiplier as final microwave output source, and output signal bandwidth modulability is high, defeated frequency
Point is more, difference in signal strength is small and adjustable.
Description of the drawings
Fig. 1 is to export microwave source structural schematic diagram for a kind of frequency tunable multiple frequency rate of the utility model.
Fig. 2 is that out of phase difference corresponds to lower sideband intensity in the utility model, wherein Fig. 2 (a) is double-side band IF inputs
RF output signal powers are composed when signal difference is 0 and pi/2, and Fig. 2 (b) is double-side band output signal lower sideband intensity rate and phase
The relationship of difference.
Fig. 3 is that different beta corresponds to output signal power spectrum analog figure in the utility model, wherein in Fig. 3 (a) input signals
Lower sideband intensity rate is composed close to frequency multiplier output signal power when 0, and Fig. 3 (b) is that input signal lower sideband intensity rate is
Frequency multiplier output signal power is composed when 0.5, frequency multiplier output signal when being 1 that Fig. 3 (c) is input signal lower sideband intensity rate
Power spectrum, Fig. 3 (d) is input signal when being the difference signals such as three frequencies, and frequency multiplier output signal power is composed.
Fig. 4 is an actual measurement output signal power spectrum in the utility model.
Fig. 5 is the test result of one application example of the utility model.
Wherein, VCO is voltage controlled oscillator, S is two pass synthetic source, DSB is double sideband modulation device, M is frequency mixer, f0For
VCO inputs frequency, fmFor low frequency synthetic source output frequency, β is double sideband modulation device lower sideband power ratio.
Specific implementation mode
Below in conjunction with the embodiment of attached drawing and effect, the technical program is described in detail.
If Fig. 1 is microwave source schematic diagram, can be reconciled first with double sideband modulation device generation assertive evidence frequency, modulating frequency defeated
Go out the adjustable polygon band lower frequency microwave signals of frequency intensity：
Lower sideband intensity and phase difference meet：
It is found in actual test, double sideband modulation device output signal includes multiple sidebands.
Then double-side band output signal is input to frequency multiplier, generating multifrequency high frequency using wherein Nonlinear Electron Devices believes
Number：
The adjusting of output signal can be flexibly realized from the intensity being can be found that in above formula between adjusting input signal peak value.
As shown in figure 5, the doppler system to be built using new microwave source measures the reflection signal graph of moving grating, it is new to be
System mainly (has difference on the frequency f by two VCO1), a dual signal output low frequency synthetic source, two quadruples, two high frequencies are mixed
Frequency device, a transmitting antenna, a low frequency filtering amplify acquisition system.
First, low frequency signal source output signal enters the ends I and Q of double sideband modulation device.Then VCO output signals enter double
The assertive evidence incidence end of sideband modulator, double sideband modulation device output radiofrequency signal enter quadrupler, are separated into two-way, a-road-through
Antenna transmitting is crossed, enters the radio-frequency head with reference to high-frequency mixer all the way.Enter detection from optical grating reflection signal by reception antenna
The radio-frequency head of signal high-frequency mixer.
Another VCO output signal is directly entered quadrupler, is then mixed respectively as parametric mixer and detection
The assertive evidence end incoming signal of device.Two frequency mixer output intermediate-freuqncy signals are filtered, work(point, amplify and be mixed, and are finally collected.
In ultimately mixing signal, different frequency point all observes Doppler frequency shift, and the size of frequency displacement is consistent with theoretical calculation.
In one embodiment, the microwave source particular technique index is as follows：
Output signal：
(1) output frequency：Frequency 33-52GHz；
(2) maximum peak and the 4th peak power difference are less than 10dB；
(3) IF frequency range 200-400MHz；
(4) effectively output frequency point is more than 4；
It is above-mentioned with reference to embodiment to the detailed description of microwave source system, be illustrative without being restrictive, therefore
Change and modification in the case where not departing from present general inventive concept, should belong to the scope of protection of the present invention within.
Claims (4)
1. a kind of frequency tunable multiple frequency rate exports microwave source, it is characterised in that：Including low frequency synthetic source, voltage controlled oscillator, bilateral
Band modulator and frequency multiplier, wherein：
The low frequency synthetic source, for generating twice frequency, the adjustable microwave signal of identical and phase difference, twice are believed with amplitude
Number respectively as double sideband modulation device intermediate frequency port input signal, pass through adjust phase difference change signal strength, signal source frequency
Rate range 50-400MHz, power bracket 0-15dBm, twice signal phase difference adjustable range 0-180 degree；
The voltage controlled oscillator provides low phase noise and the adjustable microwave signal of frequency, the assertive evidence as double sideband modulation device
Input signal, the microwave source output frequency 8-12.5GHz, output power 16dBm, tuning voltage range 0-20V, output power are flat
Smooth degree is less than 3dB；
The double sideband modulation device can pass through modulated medium frequency signal phase in the case of given assertive evidence and intermediate-freuqncy signal
Difference changes output sideband signals intensity, wherein frequency modulation adjusting range 100-500MHz, assertive evidence frequency range 8-18GHz, assertive evidence input
Power 13-18dBm；
The frequency multiplier, for finally realizing broadband, multifrequency output, frequency difference and the adjustable microwave source of intensity；
The microwave source be utilized double sideband modulation device output signal strength can reconcile frequency multiplier nonlinear effect realize tunable multiple frequency
Output.
2. a kind of frequency tunable multiple frequency rate according to claim 1 exports microwave source：It is characterized in that：Utilize frequency multiplier
Nonlinear device is realized and the frequency of signal and the amplification of power is made for the non-linear discharge effect of multitone signals
With.
3. a kind of frequency tunable multiple frequency rate according to claim 1 exports microwave source, it is characterised in that：By double-side band tune
Device processed generates the adjustable polygon band signal of frequency and signal strength is adjustable, by the intensity for adjusting frequency multiplier input signal difference peak value
Realize the output of multi-frequency intensity adjustable signal.
4. a kind of frequency tunable multiple frequency rate according to claim 1 exports microwave source, it is characterised in that：It is mainly utilized
The nonlinear effect of electronics device in frequency multiplier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721834857.9U CN207819962U (en) | 2017-12-25 | 2017-12-25 | A kind of frequency tunable multiple frequency rate output microwave source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721834857.9U CN207819962U (en) | 2017-12-25 | 2017-12-25 | A kind of frequency tunable multiple frequency rate output microwave source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092932A (en) * | 2017-12-25 | 2018-05-29 | 中国科学技术大学 | It is a kind of that microwave source is exported based on double sideband modulation device and the frequency-adjustable multi-frequency of frequency multiplier nonlinear effect |
-
2017
- 2017-12-25 CN CN201721834857.9U patent/CN207819962U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092932A (en) * | 2017-12-25 | 2018-05-29 | 中国科学技术大学 | It is a kind of that microwave source is exported based on double sideband modulation device and the frequency-adjustable multi-frequency of frequency multiplier nonlinear effect |
| CN108092932B (en) * | 2017-12-25 | 2024-03-29 | 中国科学技术大学 | Frequency-adjustable multi-frequency output microwave source based on nonlinear effects of double-sideband modulator and frequency multiplier |
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