CN109085544A - A kind of circuit improving transmitting signal stabilization - Google Patents
A kind of circuit improving transmitting signal stabilization Download PDFInfo
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- CN109085544A CN109085544A CN201811268226.4A CN201811268226A CN109085544A CN 109085544 A CN109085544 A CN 109085544A CN 201811268226 A CN201811268226 A CN 201811268226A CN 109085544 A CN109085544 A CN 109085544A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/282—Transmitters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a kind of circuit for improving transmitting signal stabilization, high voltage power supply is connect with storage capacitor, and storage capacitor is connect with modulator, the cathode connection of modulator and microwave tube；The tube body of microwave tube is connect with Body-current adjustment circuit, and Body-current adjustment circuit is connect with Body-current branch；The collector of microwave tube is connect with collector current branch；Body-current branch and collector current branch are connect with storage capacitor respectively；High voltage power supply is storage capacitor charging, provides Constant Direct Current high pressure；Storage capacitor stores high voltage direct current energy；When modulator is closed, the storage capacitor can discharge to microwave tube by modulator；Body-current branch, collector current branch and Body-current adjustment circuit provide current loop for modulator electric discharge.
Description
Technical field
The present invention relates to a kind of circuits for improving transmitting signal stabilization, belong to microwave amplifier technical field.
Background technique
The stability of transmitting signal refers to the amplitude of radiofrequency signal, phase, the stabilization of pulse recurrence frequency and pulse width
Property.Pulse compression, Moveing target indication and pulse Doppler technology is widely used in modern radar, they require that transmitting signal has
Good stability.Such as in Moveing target indication (MTI) radar, the phase distortion for emitting signal will will lead to improvement factor
Decline；In pulse Doppler (PD) radar, microwave amplifier generate noise by will lead to spectral line widen in detection zone
The increase of sideband noise level influences visibility of the radar under clutter background, or causes the appearance of false target echo.
The factor for influencing transmitting signal stabilization can be divided into determining Instable value and random Instable value.It is determining not
Top fluctuation and the regular mechanical oscillation of ambient enviroment of ripple, impulse modulation waveform of the stable quantity from transmitter supply etc.
Factor, the usually periodic function of time.Random Instable value is arbitrary, and such as the noise of transmitting tube, modulates pulse width
Random variation of degree etc. all may be one of reason.Under normal circumstances, the influence of radio frequency amplifier internal noise modulation is much smaller than
By the influence of the regular parasitic modulation such as power supply ripple.In addition, major concern is the short-term of transmitting signal in the application of radar
Stability, that is, what is considered is variation arteries and veins between of these Instable values in arteries and veins.
The stability of transmitting signal is measured in frequency domain using the phase noise of signal, it indicates transmitting letter in frequency domain
Spur performance number in signal spectrum.For example, in PD radar system, ideal clutter recognition and target acquisition in order to obtain
Ability, PD weather radar is an advantage over -85dBc to the phase noise Typical requirements of signal, and military airborne fire control pulse Doppler
Requirement of the radar to transmitting signal phase noise is then more stringent.It, must be into transmitter to meet signal spectrum purity requirement
Row is targetedly well-designed.In Airborne PD Radar, transmitter HVPS is needed using regulated power supply, and its ripple
It is better than 10-4~10-5 with stability, surge requirements are not more than 2%~3% at the top of pulse-modulator, and top drop is not more than 5%.
In high-power klystron transmitter, klystron beam voltage generally arrives several hundred kilovolts, electronics at tens kilovolts
Electric current is infused at tens amperes, such high-power high voltage power supply is manufactured almost exclusively by high frequency switch power to complete.According to transmitting
The requirement of machine signal stabilization, the stability requirement of high voltage power supply is in 10-4~10-5, and tens of kilowatt even hundreds of kw of power
It is extremely difficult that the high-voltage switch power supply of magnitude will reach 10-4~10-5 stability；Also, during pulse, high voltage power supply is to storage
The energy of energy capacitor supplement is much smaller than its energy released, and with the continuous reduction of pulse energy, the charge on storage capacitor will
Fewer and fewer, voltage is lower and lower, to make the rear amplitude for being lower than forward position along amplitude of output modulation pulse, i.e. generation pulse top
Drop, the distance of radar can be reduced by generating amplitude distortion and phase distortion, amplitude distortion so as to cause transmitter output radiofrequency signal
Resolving power, phase distortion cause output signal to generate frequency shift (FS).The capacity for increasing storage capacitor can reduce pulse top drop, but
It is damaged when microwave tube is struck sparks in order to prevent, reduces pulse top fluctuation and is limited by transmitter volume, stored up in selection
When the capacity of energy capacitor, surplus cannot be stayed too big；In addition, between transmitter radio-frequency input signals and output signal, there is phases
Position delay, and phase delay is mainly to be determined by electron transit time in microwave tube.The variation of modulation impulse amplitude can cause
The variation of velocity of electrons, so electron transit time also with changing, lead to the phase-unstable of radio frequency output signal.Cause
This will meet transmitting signal stabilization requirement, and the stability and the fluctuation of modulation pulse top for modulating impulse amplitude should be controlled higher
It is horizontal.
Document 1: Nie Keqin, " stability of klystron transmitter in moving-target indication radar ", modern radar, 1992,14
(2): 61-66；Document 2: Fan Qing, " performance evaluation of " de-Q " circuit and adjustment circuit in parallel ", hyundai electronics, 1994,48
(3): 48-51.The amplitude that document 1 and document 2 describe between the adjacent modulation pulse for reduction velocity modulation tube cathode is unstable, can adopt
With de-Q circuit and leadage circuit.De-Q circuit is made artificial using the method for the quality factor Q value for reducing charge circuit suddenly
Line stops charging to keep voltage constant.In pulse recurrence frequency (PRF) variation of radar, for de-Q circuit, by
Waiting time after boostrap is fully charged is different, and voltage leak is also different, and PRF variation can cause the larger wave of power supply
It is dynamic, therefore the circuit does not adapt to the occasion of pulse recurrence frequency variation, and its Adjustment precision is lower.Leadage circuit is in people
It, will be extra on boostrap using leadage circuit before discharge pulse arrival after work line voltage is charged to slightly above required level
Energy consumption fall, so that artificial line voltage be made to be maintained in a stable level before electric discharge.Due to the work of this circuit
Time is therefore to be called charging post regulator after boostrap is fully charged.Leadage circuit works under high voltages, and component is resistance to
Pressure request is higher, selects difficulty, and efficiency is lower.Also, document 1 and document 2 only can solve between the arteries and veins of modulation impulse amplitude
Stability is unable to improve transmitter radiofrequency signal stability deterioration problem caused by power supply ripple
Document 3: Wei Zhi, " distortion of impulse modulation waveform and influence of the power supply ripple to radar transmitter quality ", modern thunder
It reaches, 1992,14 (3): 81-91；Document 4: Wang Peijin, " influence of the power supply ripple to PD radar performance ", modern radar, 1997
(4).The influence that document 3 and document 4 describe to reduce power supply ripple to radar emission signal, can be by the switch frequency of Switching Power Supply
Rate is controllable, and strictly synchronous with the pulse recurrence frequency of radar system.The small-power switching power-supplies such as filament supply use should
Method difficulty and complexity are little, but when considering radar PRF consecutive variations, tens of kilowatt even hundreds of kilowatts of high-voltage electricity
Source causes transmitter system more complex using this method, and cost is higher.Also, document 3 and document 4 only can solve power supply ripple and lead
The transmitter radiofrequency signal stability of cause deteriorates, and is unable to improve unstable and arteries and veins inner top fluctuation between the arteries and veins of modulation impulse amplitude
Transmitting signal stabilization caused by dropping with pulse top deteriorates.
Document 5: Zhang Xianghui, " high-power klystron transmitter phase Research of Noise Characteristic ", modern radar, 2012,34
(3): 65-69.Document 5 describe control klystron beam voltage and catcher voltage stability method, by tube body with
Collector separation, the voltage between high-power high voltage power supply offer velocity modulation tube cathode and klystron collector, and collector and pipe
Extra Low small-power power between body, for compensating the unstable of tube body voltage.Small-power low-tension supply is easily done more
High stability, so as to improve transmitter phase noise.But additional supply can introduce new power supply ripple and noise, and consider
To microwave tube sparking situation, it is necessary to be specifically designed to the reliability and anti-interference ability of additional supply, increase system
Complexity.
Document 6:Jae Seung Lee, P.Lally, " Radar ' s TWT phase noise reduction ", Radar
Conference, 2005IEEE International, 2005:43-48；Document 7: He Pengjun, Zhang Guanjie, Yan Zirang, " traveling wave
The analysis and its inhibition of pipe amplifier phase noise ", fire control radar technology, 2006,35 (1): 26-29；Document 8: Liu Jie, He Peng
Army, " TWT transmitter phase noise is to radar horizon impact analysis ", fire control radar technology, 2012,41 (4): 72-
75.Document 6, document 7 and document 8 propose the scheme that travelling-wave tube amplifier phase noise is reduced using PHASE-LOCKED LOOP PLL TECHNIQUE；Text
Offer 7 and document 8 also describe for inhibit travelling-wave tube amplifier phase noise, power supply ripple identification technology can also be used.Locking phase
Loop technique detects transmitter input radio frequency signal using phase detector respectively and exports the phase information of radiofrequency signal, and by two
Phase shifter, which is given, after the difference processing of person carries out phase compensation.Power supply ripple identification technology passes through the supply voltage with ripple
Divider is sampled, by bottom limiter export two-way, be averaged all the way by top clipper and integrator, than
It is compared compared in device with another way signal, adjusts the control voltage of phase shifter according to the difference compared to reach phase benefit
The purpose repaid.PHASE-LOCKED LOOP PLL TECHNIQUE directly acts on radiofrequency signal application, and to requirement on devices height, technology is relative complex, higher cost；
Power supply ripple identification technology only can solve the problem of transmitter radiofrequency signal stability caused by power supply ripple deteriorates, and be unable to improve
The fluctuation of unstable and arteries and veins inner top deteriorates with transmitting signal stabilization caused by the drop of pulse top between modulating the arteries and veins of impulse amplitude.
Summary of the invention
In view of the above problems, the present invention provides a kind of circuits for improving transmitting signal stabilization.
In order to solve problem above, present invention employs following technical solutions: a kind of electricity improving transmitting signal stabilization
Road, which is characterized in that including high voltage power supply, storage capacitor, modulator, microwave tube, Body-current branch, collect electrode current branch
Road, Body-current adjustment circuit.High voltage power supply is connect with storage capacitor, and storage capacitor is connect with modulator, modulator and microwave
The cathode of pipe connects；The tube body of microwave tube is connect with Body-current adjustment circuit, Body-current adjustment circuit and Body-current branch
Road connection；The collector of microwave tube is connect with collector current branch；Body-current branch and collector current branch respectively with
Storage capacitor connection；
High voltage power supply is storage capacitor charging, provides Constant Direct Current high pressure；Storage capacitor stores high voltage direct current energy；Modulation
When device is closed, the storage capacitor can discharge to microwave tube by modulator；Body-current branch collects electrode current branch
Road and Body-current adjustment circuit are discharged for modulator provides current loop.
The negative terminal of the high voltage power supply E1 is connect with one end of one end of storage capacitor C1 and modulator Q1 respectively；Modulator
The other end of Q1 and the cathode of microwave tube connect；The tube body of microwave tube is connect with one end of Body-current adjustment circuit S3, and even
Connect the earth；The other end of Body-current adjustment circuit S3 is connect with one end of Body-current branch S1；The collector of microwave tube with
One end of collector current branch S2 connects；The other end of Body-current branch S1 and the other end of collector current branch S2 are total
It is same to be connected to the other end of storage capacitor C1, then connect with the anode of high voltage power supply E1.
The Body-current adjustment circuit S3 is a closed-loop system, including potential-divider network S31, error amplifier and compensation
Network S32, power amplification circuit S33 and adjustment switch S34；The potential-divider network S31 is resistance and capacitance partial pressure circuit, one end
Connect the negative terminal or microwave tube cathode of C1, other end connection the earth；S31 samples C1 voltage relative to the earth, and by suitable size
Sampling voltage give error amplifier and compensation network S32；The sampling that error amplifier and compensation network S32 send S31
Voltage is compared with reference voltage Vref, output error amplified signal；Power amplification circuit S33 sends compensation network S32
Error amplification signal, carry out power amplification, give adjustment switch S34, as adjustment switch driving signal；Adjustment switch
Using insulated gate bipolar transistor IGBT or Metal Oxide Semiconductor Field Effect Transistor MOSFET as adjustment switch in S34
Pipe, one end are connect with Body-current branch, and the tube body connection of the other end and microwave tube, work is similar to real-time in linear condition
Variable resistance.
The potential-divider network S31 includes divider resistance R1~Rn and derided capacitors C1~Cn；Resistance R1 and capacitor C1 are in parallel,
Resistance R2 and capacitor C2 are in parallel, and similarly, until resistance Rn and capacitor Cn are in parallel, then, the resistance and capacitor of all parallel connections are again
It is sequentially connected in series；Resistance R1 not connected one end is that the points of common connection of tie point P11, resistance Rn-1 and resistance Rn are P12, resistance
Rn not connected one end is tie point P13；Tie point P11 connection storage capacitor C1 negative terminal or microwave tube cathode, tie point P13 connect
Connect the earth；The sampling voltage of tie point P12 is according to storage capacitor C1 both end voltage real-time change.
The error amplifier and compensation network S32 include resistance R21, R22, R23, capacitor C21, C22, C23, and operation is put
Big device N21 and reference voltage Vref；After resistance R21 and capacitor C21 series connection, then, circuit on one side parallel connection after in parallel with resistance R22
For tie point P21, the other end connects the inverting input terminal of operational amplifier N21；Resistance R23 and capacitor C23 series connection after, then with electricity
Hold C22 parallel connection, the inverting input terminal of the circuit on one side connection operational amplifier N21 after parallel connection, the other end connects operational amplifier
The output end of N21；The non-inverting input terminal of reference voltage Vref connection operational amplifier N21, the output end of operational amplifier N21 are
Tie point P22；Tie point P21 is connect with the tie point P12 in potential-divider network S31 circuit.
The power amplification circuit S33 includes NPN triode V31, PNP triode V32, boost voltage+15V and -15V；
The base stage of triode V31 is connected with the base stage of triode V32, tie point P31；The collector and boost voltage of triode V31+
The collector of 15V connection, triode V32 is connect with boost voltage -15V；The emitter of triode V31 and the hair of triode V32
Emitter-base bandgap grading connection, tie point P32；Tie point P31 is connect with the tie point P22 in error amplifier and compensation network S32, connection
The gate pole that switching tube is adjusted in point P32 and adjustment switch S34 is connect；Power amplification circuit S33 is by error amplifier and compensates net
The low level signal amplification that network S32 is sent can also be realized for driving adjustment switching tube using linear power amplifier to power signal
This purpose.
The adjustment switch S34 includes that switch block K41, capacitance component C41, resistor assembly R41 and transient state inhibit two
Pole pipe (TVS) component V41；The switch block K41 is that single high power switch or multiple small power switches compose in parallel；It is described
Transient Suppression Diode component V41 is that single high-voltage great-current TVS or multiple TVS is formed in series and parallel；Switch block K41, capacitor
After component C41, resistor assembly R41 and Transient Suppression Diode component V41 are in parallel, one end is as tie point P41, other end conduct
Tie point P42；The connection of the other end of tie point P41 and storage capacitor, tie point P42 are connect with microwave tube tube body.
Compared with prior art, the present invention having following the utility model has the advantages that the present invention significantly reduces transmitter to high-voltage electricity
The requirement in source and modulator not only solves the fluctuation of unstable and arteries and veins inner top and pulse top drop between the arteries and veins of modulation impulse amplitude
Caused transmitting signal stabilization deterioration problem, also improves the stability of transmitter radiofrequency signal caused by power supply ripple.System
Circuit of uniting is simple, not high to component pressure resistance and power requirement, and cost is low, easy to accomplish, and loss in efficiency is small, is suitable for more
Kind occasion.
Detailed description of the invention
Fig. 1 is composition block diagram of the invention.
Fig. 2 is normal radar transmitter composition block diagram.
Fig. 3 is circuit diagram of the invention.
Fig. 4 is circuit diagram of the invention.
Fig. 5 is the typical circuit of potential-divider network in the present invention.
Fig. 6 is the typical circuit of error amplifier and compensation network in the present invention.
Fig. 7 is the typical circuit of power amplification circuit in the present invention.
Fig. 8 is the typical circuit that switch is adjusted in the present invention.
Fig. 9 is the circuit diagram of another way of realization of the present invention.
Figure 10 is benchmark electricity in sampling voltage and error amplifier and compensation network in the potential-divider network using Fig. 4 circuit
The waveform diagram of pressure.
Figure 11 is benchmark electricity in sampling voltage and error amplifier and compensation network in the potential-divider network using Fig. 9 circuit
The waveform diagram of pressure.
Specific embodiment
It is further elaborated below with reference to the present invention.
As shown in Figure 1, the present invention provides a kind of circuit for improving transmitting signal stabilization, including high voltage power supply, energy storage
Capacitor, modulator, microwave tube, Body-current branch, collector current branch and Body-current adjustment circuit.The high-voltage electricity
Source is connect with the storage capacitor；The storage capacitor is connect with the modulator；The yin of the modulator and the microwave tube
Pole connection；The tube body of the microwave tube is connect with the Body-current adjustment circuit；The Body-current adjustment circuit with it is described
The connection of Body-current branch；The collector of the microwave tube is connect with the collector current branch；The Body-current branch
It is connect respectively with storage capacitor with collector current branch.
The high voltage power supply is storage capacitor charging, provides Constant Direct Current high pressure；The storage capacitor stores high voltage direct current
Energy；The similar switch of the modulator, when modulator is closed, the storage capacitor can be put microwave tube by modulator
Electricity；The Body-current branch, collector current branch and Body-current adjustment circuit provide electric current for modulator electric discharge and return
Road.
As shown in Fig. 2, the present invention increases Body-current adjustment circuit, Body-current adjustment electricity compared with normal radar transmitter
Road can approximation be considered as variable resistance.
As shown in figure 3, the negative terminal of the high voltage power supply E1 respectively with one end of storage capacitor C1 and the modulator Q1
One end connection；The other end of the modulator Q1 and the cathode of microwave tube connect；The tube body and Body-current tune of the microwave tube
One end of whole circuit S3 connects, and connects the earth；The other end and Body-current branch S1 of the Body-current adjustment circuit S3
One end connection；The collector of microwave tube is connect with one end of collector current branch S2；The Body-current branch S1's is another
The other end of one end and collector current branch S2 are commonly connected to the other end of the storage capacitor C1, then with the high-voltage electricity
The anode of source E1 connects.
The Body-current branch S1 generally comprises capacitor, resistance, overcurrent relay and ammeter；The collection electrode current
Branch S2 generally comprises capacitor, resistance, overcurrent relay and ammeter.
As shown in figure 4, the Body-current adjustment circuit S3 is a closed-loop system, including potential-divider network S31, error are put
Big device and compensation network S32, power amplification circuit S33 and adjustment switch S34.The potential-divider network S31 is resistance and capacitor point
Volt circuit, one end connect the negative terminal of C1, other end connection the earth.S31 samples C1 voltage relative to the earth, and by suitable size
Sampling voltage gives the error amplifier and compensation network S32；The error amplifier and compensation network S32 send S31
Sampling voltage, be compared with reference voltage Vref, output error amplified signal；The power amplification circuit S33 send S32
The error amplification signal come carries out power amplification, gives the adjustment switch S34, the driving signal as adjustment switch；It is described
It adjusts and uses insulated gate bipolar transistor IGBT or Metal Oxide Semiconductor Field Effect Transistor MOSFET conduct in switch S34
Switching tube is adjusted, one end is connect with the Body-current branch, and the tube body connection of the other end and microwave tube, work online character
State is similar to real-time variable resistance.
As shown in figure 5, the potential-divider network S31 typical circuit includes divider resistance R1~Rn and derided capacitors C1~Cn.
In potential-divider network S31 typical circuit, resistance R1 and capacitor C1 are in parallel, and resistance R2 and capacitor C2 are in parallel, similarly, until resistance Rn
In parallel with capacitor Cn, then, the resistance and capacitor of all parallel connections are sequentially connected in series again.Resistance R1 not connected one end is tie point
The points of common connection of P11, resistance Rn-1 and resistance Rn are P12, and resistance Rn not connected one end is tie point P13.Tie point P11
Connect one end of the storage capacitor C1, tie point P13 connection the earth.The sampling voltage of tie point P12 is according to storage capacitor C1
Both end voltage real-time change.
As shown in fig. 6, the error amplifier and compensation network S32 typical circuit include resistance R21, R22, R23, capacitor
C21, C22, C23, operational amplifier N21 and reference voltage Vref.After resistance R21 and capacitor C21 series connection, then simultaneously with resistance R22
Connection, the circuit on one side after parallel connection are tie point P21, and the other end connects the inverting input terminal of operational amplifier N21.Resistance R23 and
After capacitor C23 series connection, then, the inverting input terminal of circuit on one side connection operational amplifier N21 parallel connection after in parallel with capacitor C22,
The output end of other end connection operational amplifier N21.The non-inverting input terminal of reference voltage Vref connection operational amplifier N21, fortune
The output end for calculating amplifier N21 is tie point P22.Tie point in tie point P21 and the potential-divider network S31 typical circuit
P12 connection.
As shown in fig. 7, the power amplification circuit S33 typical circuit include NPN triode V31, it is PNP triode V32, auxiliary
Help voltage+15V and -15V.The base stage of triode V31 is connected with the base stage of triode V32, tie point P31.Triode V31's
Collector is connect with boost voltage+15V, and the collector of triode V32 is connect with boost voltage -15V.The transmitting of triode V31
Pole is connected with the emitter of triode V32, tie point P32.Tie point P31 and the error amplifier and compensation network S32
The gate pole that switching tube is adjusted in tie point P22 connection in typical circuit, tie point P32 and the adjustment switch S34 is connect.
The low level signal amplification that S33 sends S32 also may be used for driving adjustment switching tube using linear power amplifier to power signal
Realize this purpose.
As shown in figure 8, the adjustment switch S34 typical circuit includes switch block K41, capacitance component C41, resistor assembly
R41 and Transient Suppression Diode (TVS) component V41.Single high power switch can be used in the switch block K41, can also adopt
It is composed in parallel with multiple small power switches；Single high-voltage great-current TVS can be used in the Transient Suppression Diode component V41, also
Multiple TVS can be used to form in series and parallel.After K41, C41, R41 and V41 are in parallel, one end is as tie point P41, and the other end is as company
Contact P42.The connection of the other end of tie point P41 and storage capacitor, tie point P42 are connect with microwave tube tube body.
As shown in figure 9, the one end the potential-divider network S31 connects microwave tube cathode, the other end unlike unique from Fig. 4
Connection the earth.The voltage of S31 sampler modulator Q1 output end relative to the earth, and give the sampling voltage of suitable size to the mistake
Poor amplifier and compensation network S32.Using Fig. 4 circuit, it can only improve power supply ripple and caused transmitter drops in modulation pulse top
Radiofrequency signal stability deterioration problem；And Fig. 9 circuit is used, it can not only improve hair caused by power supply ripple and modulation pulse top drop
Machine radiofrequency signal stability deterioration problem is penetrated, the fluctuation of unstable and arteries and veins inner top is led between can also solving the arteries and veins of modulation impulse amplitude
The transmitting signal stabilization of cause deteriorates.
As shown in Figure 10, according to Fig. 4 circuit, left figure is the exemplary waveforms of sampling voltage in potential-divider network, and right figure is to miss
The exemplary waveforms of reference voltage in poor amplifier and compensation network.
As shown in figure 11, according to Fig. 9 circuit, left figure is the exemplary waveforms of sampling voltage in potential-divider network, and right figure is to miss
The exemplary waveforms of reference voltage in poor amplifier and compensation network.
Working principle of the present invention is as follows: transmitter mesohigh power supply provides DC energy, storage capacitor for storage capacitor
Modulated device discharges to microwave tube, and microwave tube amplifies radiofrequency signal.By high voltage power supply bring low-frequency ripple, height
The top fluctuation and top drop that noise that frequency ripple, switching device generate etc. and discharge pulse are generated due to loop distribution parameter,
Voltage can be infused to microwave tube electronics and generates amplitude modulation, so as to cause the deterioration of microwave tube output radiofrequency signal phase noise.
It influences the most important factor of phase noise to be to infuse the electric field of offer initial velocity to microwave tube electronics, which is
What the voltage between cathode and tube body was formed.Also, microwave tube Beam transmission is generally more than 80%, and Body-current is only accounted for and put
The 10%~20% of electric pulse total current.
According to storage capacitor or the voltage amplitude variation of modulation pulse, the Body-current tune of series connection in the loop is adjusted in real time
The pressure drop of whole circuit, so that the voltages keep constant between microwave tube cathode and tube body, then lose lesser in transmitter frequency
In the case of, it can effectively reduce the phase noise of microwave tube.
Based on the present invention, transmitter significantly reduces the requirement to high voltage power supply and modulator, not only solves modulation arteries and veins
It rushes and emits signal stabilization deterioration problem caused by the fluctuation of unstable between the arteries and veins of amplitude and arteries and veins inner top and pulse top drop, it can also
Improve transmitter radiofrequency signal stability deterioration problem caused by power supply ripple.Circuit system is simple, to component pressure resistance and function
Rate is of less demanding, and cost is low, easy to accomplish, and loss in efficiency is small, is suitable for a variety of occasions.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of circuit for improving transmitting signal stabilization, which is characterized in that including high voltage power supply, storage capacitor, modulator, micro-
Wave duct, Body-current branch, collector current branch, Body-current adjustment circuit；
High voltage power supply is connect with storage capacitor, and storage capacitor is connect with modulator, the cathode connection of modulator and microwave tube；Microwave
The tube body of pipe is connect with Body-current adjustment circuit, and Body-current adjustment circuit is connect with Body-current branch；The receipts of microwave tube
Collector is connect with collector current branch；Body-current branch and collector current branch are connect with storage capacitor respectively；
High voltage power supply is storage capacitor charging, provides Constant Direct Current high pressure；Storage capacitor stores high voltage direct current energy；Modulator closes
When conjunction, the storage capacitor can discharge to microwave tube by modulator；Body-current branch, collector current branch with
And Body-current adjustment circuit provides current loop for modulator electric discharge.
2. a kind of circuit for improving transmitting signal stabilization according to claim 1, which is characterized in that
The negative terminal of the high voltage power supply E1 is connect with one end of one end of storage capacitor C1 and modulator Q1 respectively；Modulator Q1's
The connection of the cathode of the other end and microwave tube；The tube body of microwave tube is connect with one end of Body-current adjustment circuit S3, and is connected big
Ground；The other end of Body-current adjustment circuit S3 is connect with one end of Body-current branch S1；The collector of microwave tube and collection
One end of electrode current branch S2 connects；The other end of Body-current branch S1 and the other end of collector current branch S2 connect jointly
It is connected to the other end of storage capacitor C1, then is connect with the anode of high voltage power supply E1.
3. a kind of circuit for improving transmitting signal stabilization according to claim 2, which is characterized in that the Body-current
Adjustment circuit S3 is a closed-loop system, including potential-divider network S31, error amplifier and compensation network S32, power amplification circuit
S33 and adjustment switch S34；The potential-divider network S31 is bleeder circuit, and one end connects the negative terminal or microwave tube cathode of C1, another
End connection the earth；S31 samples the voltage of C1 relative to the earth, and gives the sampling voltage of suitable size to error amplifier and compensation
Network S32；The sampling voltage that error amplifier and compensation network S32 send S31, is compared with reference voltage Vref, defeated
Error amplification signal out；The error amplification signal that power amplification circuit S33 sends compensation network S32 carries out power amplification, send
Give adjustment switch S34, the driving signal as adjustment switch；Adjust switch S34 in use insulated gate bipolar transistor IGBT or
As adjustment switching tube, one end is connect Metal Oxide Semiconductor Field Effect Transistor MOSFET with Body-current branch, another
End is connect with the tube body of microwave tube.
4. a kind of circuit for improving transmitting signal stabilization according to claim 3, which is characterized in that the potential-divider network
S31 includes divider resistance R1~Rn and derided capacitors C1~Cn；Resistance R1 and capacitor C1 are in parallel, and resistance R2 and capacitor C2 are in parallel,
Similarly, until resistance Rn and capacitor Cn are in parallel, then, the resistance and capacitor of all parallel connections are sequentially connected in series again；Resistance R1 does not connect
The one end connect is that the points of common connection of tie point P11, resistance Rn-1 and resistance Rn are P12, and resistance Rn not connected one end is to connect
Contact P13；Tie point P11 connection storage capacitor C1 negative terminal or microwave tube cathode, tie point P13 connection the earth；Tie point P12's
Sampling voltage is according to storage capacitor C1 both end voltage real-time change.
5. a kind of circuit for improving transmitting signal stabilization according to claim 3, which is characterized in that the error amplification
Device and compensation network S32 include resistance R21, R22, R23, capacitor C21, C22, C23, operational amplifier N21 and reference voltage
Vref；After resistance R21 and capacitor C21 series connection, then it is in parallel with resistance R22, the circuit on one side after parallel connection is tie point P21, another
The inverting input terminal of end connection operational amplifier N21；After resistance R23 and capacitor C23 series connection, then it is in parallel with capacitor C22, after in parallel
Circuit on one side connection operational amplifier N21 inverting input terminal, the other end connect operational amplifier N21 output end；Benchmark
The non-inverting input terminal of voltage Vref connection operational amplifier N21, the output end of operational amplifier N21 are tie point P22；Tie point
P21 is connect with the tie point P12 in potential-divider network S31 circuit.
6. a kind of circuit for improving transmitting signal stabilization according to claim 3, which is characterized in that the power amplification
Circuit S33 includes NPN triode V31, PNP triode V32, boost voltage+15V and -15V；The base stage of triode V31 and three poles
The base stage of pipe V32 connects, tie point P31；The collector of triode V31 is connect with boost voltage+15V, the collection of triode V32
Electrode is connect with boost voltage -15V；The emitter of triode V31 is connected with the emitter of triode V32, tie point P32；
Tie point P31 is connect with the tie point P22 in error amplifier and compensation network S32, in tie point P32 and adjustment switch S34
Adjust the gate pole connection of switching tube.
7. a kind of circuit for improving transmitting signal stabilization according to claim 3, which is characterized in that the adjustment switch
S34 includes switch block K41, capacitance component C41, resistor assembly R41 and Transient Suppression Diode component V41；The switch
After component K41, capacitance component C41, resistor assembly R41 and the V41 parallel connection of Transient Suppression Diode component, one end is as tie point
P41, the other end is as tie point P42；The connection of the other end of tie point P41 and storage capacitor, tie point P42 and microwave tube tube body
Connection.
8. a kind of circuit for improving transmitting signal stabilization according to claim 7, which is characterized in that the switch block
K41 is that single high power switch or multiple small power switches compose in parallel；The Transient Suppression Diode component V41 is single high
Pressure high current TVS or multiple TVS is formed in series and parallel.
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| CN201811268226.4A CN109085544B (en) | 2018-10-29 | 2018-10-29 | Circuit for improving stability of transmitting signal |
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| CN201811268226.4A CN109085544B (en) | 2018-10-29 | 2018-10-29 | Circuit for improving stability of transmitting signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113033135A (en) * | 2021-01-20 | 2021-06-25 | 成都锦江电子系统工程有限公司 | Output phase modeling method for radar transmitter unintentional modulation klystron |
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| CN109085544B (en) | 2023-11-03 |
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