CN104539271A - Grid modulator based on cathode positive and negative outputs and implementation method thereof - Google Patents
Grid modulator based on cathode positive and negative outputs and implementation method thereof Download PDFInfo
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- CN104539271A CN104539271A CN201410641737.1A CN201410641737A CN104539271A CN 104539271 A CN104539271 A CN 104539271A CN 201410641737 A CN201410641737 A CN 201410641737A CN 104539271 A CN104539271 A CN 104539271A
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Abstract
The invention relates to a grid modulator based on cathode positive and negative outputs. The grid modulator comprises a driving module which is externally connected with a synchronizing signal, wherein the output end of the driving module is connected with the input end of a modulation circuit; a correcting power supply is connected in series between a positively-biased power supply and a negatively-biased power supply; polarities on the joints of the correcting power supply, the positively-biased power supply and the negatively-biased power supply are the same; the correcting power supply, the positively-biased power supply and the negatively-biased power supply are used for supplying power to a switch-on switch V1 and a switch-off switch V2 in the modulation circuit; both the switch-on switch V1 and the switch-off switch V2 are MOS (Metal Oxide Semiconductor) tubes; the output end of the modulation circuit is connected with the control electrode and the cathode of a load; and the load is a microwave tube. The invention further discloses an implementation method of the grid modulator based on the cathode positive and negative outputs. Through a method for adjusting the output voltages of the positively-biased power supply and the correcting power supply, continuous adjustability of the output pulse voltage of the modulator from a negative voltage to a positive voltage or from the positive voltage to the negative voltage is realized. The grid modulator can be applied to a plurality of microwave tube power supply occasions, and has high practicability.
Description
Technical field
The present invention relates to grid modulator technical field, especially a kind of grid modulator based on the positive negative output of negative electrode and its implementation.
Background technology
Along with the development of high-voltage pulse modulation technique, power electronic technology and high voltage technique, the technology for widening application of field of radar based on high pressure grid pulse modulator.Widely, topmost use is the break-make controlling electron beam to the purposes of modulator, realizes turning on and off of electron tube, vacuum microwave tube etc.Existing grid modulator provides modulation voltage owing to adopting positively biased power supply and negative bias power supply for microwave tube gate, positively biased power supply forms positive pulse for modulator, make microwave tube output electron beam, its pulse voltage is that within the scope of zero to hundreds of volt, its pulse current is within tens of milliamperes relative to negative electrode; Negative bias power supply makes travelling wave tube beam suppression, and its output voltage is at a few hectovolt in the scope of several kilovolts, but electric current is little of can ignore, but this can only modulate for the required microwave tube being positive pulse based on negative electrode, and more single, practicality is poor; And the implementation method such as its internal circuit, power supply is too complicated, cause modulator volume larger.
Summary of the invention
Primary and foremost purpose of the present invention is to provide a kind of based on the exportable positive pulse of negative electrode or negative pulse, the practical grid modulator based on the positive negative output of negative electrode.
For achieving the above object, present invention employs following technical scheme: a kind of grid modulator based on the positive negative output of negative electrode, comprise external synchronizing signal for the opening switch V1 of modulation circuit, shutdown switch V2 provides unbalanced pulse signal, turn off the driver module of pulse signal, its output is connected with the input of modulation circuit, revise power series between positively biased power supply and negative bias power supply, revise power supply and positively biased power supply, polarity identical and three in negative bias power supply junction is all to the opening switch V1 in modulation circuit, shutdown switch V2 powers, described opening switch V1, shutdown switch V2 is metal-oxide-semiconductor, the control electrode of the output terminating load of modulation circuit and negative electrode, described load is microwave tube.
Described modulation circuit is by opening switch V1, shutdown switch V2, clamper tube V3, isolating diode V4, opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2, sparking current-limiting resistance R3 and divider resistance R4 forms, the drain electrode of opening switch V1 is connected with the positive pole of positively biased power supply, the negative pole of positively biased power supply is connected with the negative pole revising power supply, the positive pole revising power supply is connected with the positive pole of negative bias power supply, and the source electrode of opening switch V1 is successively by opening switch current-limiting resistance R1, the drain electrode of shutdown switch current-limiting resistance R2 on/off switch V2, the source electrode of shutdown switch V2 respectively with one end of divider resistance R4, the negative pole of negative bias power supply is connected, the other end of divider resistance R4 respectively with opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2, one end of sparking current-limiting resistance R3 is connected with the anode of isolating diode V4, and the negative electrode of isolating diode V4 is connected with the negative pole of positively biased power supply, the other end of sparking current-limiting resistance R3 respectively with one end of clamper tube V3, the control electrode of load is connected, the other end of clamper tube V3 respectively with the positive pole revising power supply, the positive pole of negative bias power supply, the negative electrode of load is connected.
First output of described driver module is connected with the grid of opening switch V1, and the second output of described driver module is connected with the grid of shutdown switch V2, and described positively biased power supply, correction power supply and negative bias power supply all adopt modular power.
Described opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2, sparking current-limiting resistance R3 and divider resistance R4 are noninductive wire-wound resistor.
Described clamper tube V3 is that transient state suppresses TVS pipe, and described isolating diode V4 is glassivation fast recovery rectifier diode.
Another object of the present invention is to the implementation method providing a kind of grid modulator based on the positive negative output of negative electrode, the method comprises the step of following order:
(1) regulate operating frequency and the pulsewidth width of the synchronizing signal sending into driver module, control opening switch V1 and the work of shutdown switch V2 alternate conduction of modulation circuit, make grid modulator export the impulse waveform of certain amplitude;
(2) regulate positively biased power supply, revise the output voltage of power supply, realize grid modulator voltage pulse output and be pressed onto positive voltage from negative electricity, or be pressed onto the continuously adjustabe of negative voltage from positive electricity; Regulate the output voltage of negative bias power supply to microwave tube electron beam cut-off required voltage simultaneously, realize the cut-off of different microwave tube electron beam.
As shown from the above technical solution, the present invention adopts and revises power series between positively biased power supply and negative bias power supply, and by regulating positively biased power supply, revising the method for electric power output voltage, realize modulator voltage pulse output and be pressed onto positive voltage from negative electricity or be pressed onto the continuously adjustabe of negative voltage from positive electricity.Compared with prior art, voltage pulse output of the present invention can just can be born based on negative electrode, and based on the voltage pulse output continuously adjustabe of negative electrode, can apply and multiple microwave tube power supply occasion, practicality is stronger.In addition, driver module, positively biased power supply, correction power supply, negative bias power supply all adopt modularization, substantially reduce the volume of grid modulator.
Accompanying drawing explanation
Fig. 1 is circuit structure block diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention;
Fig. 3 is the working waveform figure that the present invention exports.
Embodiment
A kind of grid modulator based on the positive negative output of negative electrode, comprise external synchronizing signal for the opening switch V1 of modulation circuit, shutdown switch V2 provides unbalanced pulse signal, turn off the driver module 1 of pulse signal, its output is connected with the input of modulation circuit 2, revising power supply 4 is serially connected with between positively biased power supply 3 and negative bias power supply 5, revise power supply 4 and positively biased power supply 3, polarity identical and three in negative bias power supply 5 junction is all to the opening switch V1 in modulation circuit 2, shutdown switch V2 powers, positively biased power supply 3, correction power supply 4 and negative bias power supply 5 all adopt modular power, described opening switch V1, shutdown switch V2 is metal-oxide-semiconductor, the control electrode of the output terminating load of modulation circuit 2 and negative electrode, described load is microwave tube, as Fig. 1, shown in 2, in fig. 2, G represents grid and the control electrode of microwave tube, K represents the negative electrode of microwave tube.
As Fig. 1, shown in 2, described modulation circuit 2 is by opening switch V1, shutdown switch V2, clamper tube V3, isolating diode V4, opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2, sparking current-limiting resistance R3 and divider resistance R4 forms, the drain electrode of opening switch V1 is connected with the positive pole of positively biased power supply 3, the negative pole of positively biased power supply 3 is connected with the negative pole revising power supply 4, the positive pole revising power supply 4 is connected with the positive pole of negative bias power supply 5, and the source electrode of opening switch V1 is successively by opening switch current-limiting resistance R1, the drain electrode of shutdown switch current-limiting resistance R2 on/off switch V2, the source electrode of shutdown switch V2 respectively with one end of divider resistance R4, the negative pole of negative bias power supply 5 is connected, the other end of divider resistance R4 respectively with opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2, one end of sparking current-limiting resistance R3 is connected with the anode of isolating diode V4, and the negative electrode of isolating diode V4 is connected with the negative pole of positively biased power supply 3, the other end of sparking current-limiting resistance R3 respectively with one end of clamper tube V3, the control electrode of load is connected, the other end of clamper tube V3 respectively with the positive pole revising power supply 4, the positive pole of negative bias power supply 5, the negative electrode of load is connected.
As shown in Figure 1, 2, first output of described driver module 1 is connected with the grid of opening switch V1, second output of described driver module 1 is connected with the grid of shutdown switch V2, and driver module 1 provides unbalanced pulse signal for giving opening switch V1, the shutdown switch V2 of modulation circuit 2 and turns off pulse signal.Described opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2, sparking current-limiting resistance R3 and divider resistance R4 are noninductive wire-wound resistor; opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2 are respectively used to according to unbalanced pulse or turn off pulse conducting unlatching or cut-ff voltage; sparking current-limiting resistance R3 is used for when striking sparks; the electric current of the control electrode of protection microwave tube is excessive; improve the reliability of modulator, divider resistance R4 is used for dividing potential drop negative bias power supply 5 voltage.Described clamper tube V3 is that transient state suppresses TVS pipe, and for the protection of the overtension of microwave tube control electrode, described isolating diode V4 is glassivation fast recovery rectifier diode, when opening switch V1 damages for the protection of the control electrode of microwave tube.
As shown in Figure 1, 2, 3, operationally, first, operating frequency and the pulsewidth width of the synchronizing signal sending into driver module 1 is regulated, control opening switch V1 and the work of shutdown switch V2 alternate conduction of modulation circuit 2, make grid modulator export the impulse waveform of certain amplitude; Secondly, regulate positively biased power supply 3, revise the output voltage of power supply 4, realize grid modulator voltage pulse output and be pressed onto positive voltage from negative electricity, or be pressed onto the continuously adjustabe of negative voltage from positive electricity; Regulate the output voltage of negative bias power supply 5 to microwave tube electron beam cut-off required voltage simultaneously, realize the cut-off of different microwave tube electron beam.
Embodiment one
Driver module 1 provides the two-way drive singal that frequency f is 1kHz, pulsewidth Ton1, Ton2 is respectively 20 μ s, 200ns to export; The output voltage U1 of positively biased power supply 3 is 0 ~+1000V regulated power supply, and the output voltage U2 revising power supply 4 is 0 ~+500V, and the output voltage U3 of negative bias power supply 5 is 0 ~-5kV; Load is travelling wave tube; In modulation circuit 2, opening switch V1, shutdown switch V2 are 5 FQP9N90C series connection, and clamper tube V3 is 12 1.5KE440CA series connection, and isolating diode V4 is that 5 glassivation fast recovery rectifier diode BYV26E connect; Opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2 are noninductive wire-wound resistor 8W200 Ω, and sparking current-limiting resistance R3 is noninductive wire-wound resistor 8W75 Ω, divider resistance R4 is noninductive wire-wound resistor 200k Ω.
If during the output conducting travelling wave tube electron beam of modulator, needing to add relative to negative electrode is negative voltage 200V; During the cut-off of travelling wave tube electron beam, needing to add needs, to add relative to negative electrode be negative voltage 5000V.
Within a work period, modulator device has 3 states, as shown in Figure 2,3.
Stage 1(t0 ~ t1): opening switch V1 conducting, shutdown switch V2 turns off, positively biased power supply 3 and opening switch current-limiting resistance R1, clamper tube V3 form a current circuit, travelling wave tube grid negative electrode both end voltage value depends on the difference of the voltage of positively biased power supply 3 and correction power supply 4, i.e. travelling wave tube grid negative electrode both end voltage value Ugk=U1-U2, regulate the voltage of positively biased power supply 3 to 300V, revise power supply 4 voltage to 500V, now Ugk is-200V, meet this travelling wave tube electron beam turn-on condition, make the grid negative electrode of travelling wave tube be in forward bias condition; Ugk is travelling wave tube grid negative electrode both end voltage value, is also that modulator exports pulse amplitude.
Stage 2(t1 ~ t2): shutdown switch V2 conducting, opening switch V1 turns off, negative bias power supply 5 output voltage is received on the grid of travelling wave tube, now travelling wave tube grid negative electrode both end voltage value is Ugk=[RL/ (RL+R2)] * U3 ≈ U3, regulate negative bias power supply 5 voltage to-5000V, i.e. Ugk ≈-5000V; Wherein general travelling wave tube grid cathode impedance RL is much larger than shutdown switch current-limiting resistance R2, and now travelling wave tube grid negative electrode is cut off, and its beam current turns off.
Stage 3(t2 ~ t3): opening switch V1, shutdown switch V2 all turn off, its grid negative electrode both end voltage value depends on the product of the impedance RL between travelling wave tube grid negative electrode own and impedance RL, the current-limiting resistance R3 that strikes sparks, the ratio of divider resistance R4 sum and the output voltage of negative bias power supply 5 between the grid negative electrode of travelling wave tube own, i.e. Ugk=[RL/ (RL+R3+R4)] * U3, to realize the grid negative electrode negative bias of travelling wave tube, namely travelling wave tube is cut off.
Embodiment two
Driver module 1 provides the two-way drive singal that frequency f is 2kHz, pulsewidth Ton1, Ton2 is respectively 5 μ s, 200ns to export; The output voltage U1 of positively biased power supply 3 is 0 ~+1000V regulated power supply, and revising power supply 4 output voltage U2 is 0 ~+500V, and negative bias power supply 5 output voltage U3 is 0 ~-5kV; Load is travelling wave tube; In modulation circuit 2, opening switch V1, shutdown switch V2 are 5 FQP9N90C series connection, and clamper tube V3 is 12 1.5KE440CA series connection, and isolating diode V4 is that 5 glassivation fast recovery rectifier diode BYV26E connect; Opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2 are noninductive wire-wound resistor 8W200 Ω, and sparking current-limiting resistance R3 is noninductive wire-wound resistor 8W75 Ω, divider resistance R4 is noninductive wire-wound resistor 200k Ω.
If during the output conducting travelling wave tube electron beam of modulator, needing to add relative to negative electrode is positive voltage 350V.
Within a work period, modulator device has 3 states, as shown in Figure 2,3.
Stage 1(t0 ~ t1): opening switch V1 conducting, shutdown switch V2 turns off, positively biased power supply 3 and opening switch current-limiting resistance R1, isolating diode V3 form a current circuit, travelling wave tube grid negative electrode both end voltage value depends on the difference of the voltage of positively biased power supply 3 and correction power supply 4, i.e. travelling wave tube grid negative electrode both end voltage value Ugk=U1-U2, regulate the voltage of positively biased power supply 3 to 800V, revise power supply 4 voltage to 500V, now Ugk is+300V, meet this travelling wave tube electron beam turn-on condition, make the grid negative electrode of travelling wave tube be in forward bias condition;
Stage 2(t1 ~ t2): shutdown switch V2 conducting, opening switch V1 turns off, negative bias power supply 5 output voltage is received on the grid of travelling wave tube, now travelling wave tube grid negative electrode both end voltage value is Ugk=[RL/ (RL+R2)] * U3 ≈ U3, regulate the voltage of negative bias power supply 5 to-2000V, i.e. Ugk ≈-2000V; Wherein general travelling wave tube grid cathode impedance RL is much larger than shutdown switch current-limiting resistance R2, and now travelling wave tube grid negative electrode is cut off, and its beam current turns off.
Stage 3(t2 ~ t3): opening switch V1, shutdown switch V2 all turn off, its grid negative electrode both end voltage value depends on the product of the impedance RL between travelling wave tube grid negative electrode own and impedance RL, the current-limiting resistance R3 that strikes sparks, the ratio of divider resistance R4 sum and the voltage of negative bias power supply 5 between the grid negative electrode of travelling wave tube own, i.e. Ugk=[RL/ (RL+R3+R4)] * U3, to realize the grid negative electrode negative bias of travelling wave tube, namely travelling wave tube is cut off.
In sum, structure of the present invention is simple, revising power supply 4 is serially connected with between positively biased power supply 3 and negative bias power supply 5, make correction power supply 4 identical with the polarity of positively biased power supply 3, negative bias power supply 5 junction, again by regulating positively biased power supply 3, revising the voltage pulse output continuously adjustabe of the voltage realization of power supply 4 based on negative electrode, thus the work of control lines wave duct grid and control electrode, modulator can be applied and multiple microwave tube power supply occasion.
Claims (6)
1. the grid modulator based on the positive negative output of negative electrode, it is characterized in that: comprise external synchronizing signal for the opening switch V1 of modulation circuit, shutdown switch V2 provides unbalanced pulse signal, turn off the driver module of pulse signal, its output is connected with the input of modulation circuit, revise power series between positively biased power supply and negative bias power supply, revise power supply and positively biased power supply, polarity identical and three in negative bias power supply junction is all to the opening switch V1 in modulation circuit, shutdown switch V2 powers, described opening switch V1, shutdown switch V2 is metal-oxide-semiconductor, the control electrode of the output terminating load of modulation circuit and negative electrode, described load is microwave tube.
2. the grid modulator based on the positive negative output of negative electrode according to claim 1, is characterized in that: described modulation circuit is by opening switch V1, shutdown switch V2, clamper tube V3, isolating diode V4, opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2, sparking current-limiting resistance R3 and divider resistance R4 forms, the drain electrode of opening switch V1 is connected with the positive pole of positively biased power supply, the negative pole of positively biased power supply is connected with the negative pole revising power supply, the positive pole revising power supply is connected with the positive pole of negative bias power supply, and the source electrode of opening switch V1 is successively by opening switch current-limiting resistance R1, the drain electrode of shutdown switch current-limiting resistance R2 on/off switch V2, the source electrode of shutdown switch V2 respectively with one end of divider resistance R4, the negative pole of negative bias power supply is connected, the other end of divider resistance R4 respectively with opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2, one end of sparking current-limiting resistance R3 is connected with the anode of isolating diode V4, and the negative electrode of isolating diode V4 is connected with the negative pole of positively biased power supply, the other end of sparking current-limiting resistance R3 respectively with one end of clamper tube V3, the control electrode of load is connected, the other end of clamper tube V3 respectively with the positive pole revising power supply, the positive pole of negative bias power supply, the negative electrode of load is connected.
3. the grid modulator based on the positive negative output of negative electrode according to claim 1, it is characterized in that: the first output of described driver module is connected with the grid of opening switch V1, second output of described driver module is connected with the grid of shutdown switch V2, and described positively biased power supply, correction power supply and negative bias power supply all adopt modular power.
4. the grid modulator based on the positive negative output of negative electrode according to claim 2, is characterized in that: described opening switch current-limiting resistance R1, shutdown switch current-limiting resistance R2, sparking current-limiting resistance R3 and divider resistance R4 are noninductive wire-wound resistor.
5. the grid modulator based on the positive negative output of negative electrode according to claim 2, is characterized in that: described clamper tube V3 is that transient state suppresses TVS pipe, and described isolating diode V4 is glassivation fast recovery rectifier diode.
6., based on an implementation method for the grid modulator of the positive negative output of negative electrode, the method comprises the step of following order:
(1) regulate operating frequency and the pulsewidth width of the synchronizing signal sending into driver module, control opening switch V1 and the work of shutdown switch V2 alternate conduction of modulation circuit, make grid modulator export the impulse waveform of certain amplitude;
(2) regulate positively biased power supply, revise the output voltage of power supply, realize grid modulator voltage pulse output and be pressed onto positive voltage from negative electricity, or be pressed onto the continuously adjustabe of negative voltage from positive electricity; Regulate the output voltage of negative bias power supply to microwave tube electron beam cut-off required voltage simultaneously, realize the cut-off of different microwave tube electron beam.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108874011A (en) * | 2018-10-09 | 2018-11-23 | 中国电子科技集团公司第三十八研究所 | A kind of grid modulation circuit of LDMOS solid-state power amplifier |
| CN110380709A (en) * | 2019-07-12 | 2019-10-25 | 浙江大学 | High speed grid pulse modulation circuit and radio-frequency power amplifier |
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| US4853559A (en) * | 1987-01-24 | 1989-08-01 | Samsung Semiconductor And Telecommunications Co., Ltd. | High voltage and power BiCMOS driving circuit |
| CN1933154A (en) * | 2005-09-16 | 2007-03-21 | 富士电机电子设备技术株式会社 | Semicoductor circuit, inverter circuit, semiconductor apparatus |
| CN201878039U (en) * | 2010-11-25 | 2011-06-22 | 合肥雷科电子科技有限公司 | Power supply device of pulsed magnetron transmitter |
| CN203536355U (en) * | 2013-10-29 | 2014-04-09 | 合肥雷科电子科技有限公司 | Travelling wave tube amplifier power supply device |
| CN204206133U (en) * | 2014-11-14 | 2015-03-11 | 合肥雷科电子科技有限公司 | A kind of grid modulator based on the positive negative output of negative electrode |
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2014
- 2014-11-14 CN CN201410641737.1A patent/CN104539271A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4853559A (en) * | 1987-01-24 | 1989-08-01 | Samsung Semiconductor And Telecommunications Co., Ltd. | High voltage and power BiCMOS driving circuit |
| CN1933154A (en) * | 2005-09-16 | 2007-03-21 | 富士电机电子设备技术株式会社 | Semicoductor circuit, inverter circuit, semiconductor apparatus |
| CN201878039U (en) * | 2010-11-25 | 2011-06-22 | 合肥雷科电子科技有限公司 | Power supply device of pulsed magnetron transmitter |
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| CN204206133U (en) * | 2014-11-14 | 2015-03-11 | 合肥雷科电子科技有限公司 | A kind of grid modulator based on the positive negative output of negative electrode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108874011A (en) * | 2018-10-09 | 2018-11-23 | 中国电子科技集团公司第三十八研究所 | A kind of grid modulation circuit of LDMOS solid-state power amplifier |
| CN110380709A (en) * | 2019-07-12 | 2019-10-25 | 浙江大学 | High speed grid pulse modulation circuit and radio-frequency power amplifier |
| CN110380709B (en) * | 2019-07-12 | 2021-08-27 | 浙江大学 | High-speed grid pulse modulation circuit and radio frequency power amplifier |
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