CN102158074B - Pulse width switching circuit structure - Google Patents
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- CN102158074B CN102158074B CN 201110059172 CN201110059172A CN102158074B CN 102158074 B CN102158074 B CN 102158074B CN 201110059172 CN201110059172 CN 201110059172 CN 201110059172 A CN201110059172 A CN 201110059172A CN 102158074 B CN102158074 B CN 102158074B
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Abstract
The invention relates to a pulse width switching circuit structure, comprising a Blumlein pulse forming network (PFN), wherein the Blumlein PFN is provided with a second high-voltage relay K2 which is used for dividing the Blumlein PFN into a first PFN and a second PFN; the first PFN and the second PFN are distributed uniformly and symmetrically; the first PFN is internally provided with at least one first high-voltage relay K1; the second PFN is internally provided with at least one third high-voltage relay K3; the third high-voltage relay K3 is arranged corresponding to the first high-voltage relay K1, thus a pulse network structure which is divided by the third high-voltage relay K3 in the second PFN corresponds to a pulse network structure which is divided by a first relay in the first PFN; and coils of the first high-voltage relay K1, the second high-voltage relay K2 and the third high-voltage relay K3 are connected with a relay drive circuit. The pulse width switching circuit structure is convenient to install and use and wide in applicable scope, reduces the reformation cost of digital weather radars, and is safe and reliable.
Description
Technical field
The present invention relates to a kind of circuit structure, especially a kind of circuit structure for transforming pulse width, specifically the circuit structure of Blumlein pulse forming network pulse duration conversion in a kind of radar vacuum microwave pipe transmitter line style pulse modulator, belong to the pulse modulated technical field of radar transmitter.
Background technology
The line style pulse modulator is the important component part of present high-power vacuum microwave pipe transmitter, is also general adopted modulation scheme; Be mainly used on the radar transmitter microwave source with pulse mode work.The pulsewidth of line style pulse modulator is determined by pulse forming network, its theoretical foundation is transmission line, the time delay of utilizing ripple to transmit in transmission line to produce forms pulse duration, electric capacity, the inductive bank of a plurality of lumped parameters commonly used become the chain structural network to replace transmission line in actual use, each electric capacity and inductance consist of a joint, inductance coil is the mutual inductance type structure, by make total inductance around wire on a fluting insulated tube.Joint number fire pulse width more at most is wider.In case after capacitor and inductor (or joint number) were determined, formed pulsewidth was also just definite, this is the distinguishing feature of line-type modulator, is also its a remarkable shortcoming (can not realize the variation of pulse duration).Can be divided into single line and multi-thread according to transmission line quantity used in modulator, two-wire circuit is that the Blumlein circuit can make the pulse transformer primary voltage reach the charging voltage of pulse forming network, the namely twice of single line pulse forming network (single boostrap) discharge voltage.The no-load voltage ratio of pulse transformer also can reduce half simultaneously, has greatly improved thus the time that pulse is risen.This technology is used widely in the pulse technique of superhigh pressure nanosecond magnitude.Adopt the radar transmitter of this technology to compare with common single boostrap transmitter, structure is light and handy, is conducive to the miniaturization of solid state modulator and improves reliability.
At present, Digitized Weather Radar System occupies very great share on market, and described Digitized Weather Radar System can not adapt to the weather of Doppler radar and survey business and research needs, has affected the application of weather radar; The Doppler radar cost is high, with the Digitized Weather Radar System repacking, can possess the function of Doppler radar, needs to adjust the structure of line style pulse modulator, makes it adapt to the requirement of Doppler radar.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of circuit structure for transforming pulse width is provided, it is simple in structure, and is easy to install, applied widely, has reduced the improvement cost of Digitized Weather Radar System, safe and reliable.
According to technical scheme provided by the invention, described circuit structure for transforming pulse width, comprise the Blumlein pulse forming network, described Blumlein pulse forming network comprises some pulse forming network capacitors and the pulse forming network inductor that is complementary and arranges with described pulse forming network capacitor; Described Blumlein pulse forming network inductor is provided with the second high-voltage relay, on the contact of described the second high-voltage relay and Blumlein pulse forming network, corresponding inductor end is connected, and link position is in the middle of the first pulse forming network and the second pulse forming network that the Blumlein pulse forming network distributes symmetrically; Be provided with at least one first high-voltage relay in described the first pulse forming network, in the contact of described the first high-voltage relay and the first pulse forming network, corresponding pulse forming network inductor end is connected; Be provided with at least one third high potential relay in the second pulse forming network, in the contact of described third high potential relay and the second pulse forming network, corresponding pulse forming network inductor end is connected; Third high potential relay and the first corresponding layout of high-voltage relay make the pulse network structure that is separated into by the first high-voltage relay in the pulse network structure that is separated into by the third high potential relay in the second pulse forming network and the first pulse forming network corresponding with the structure of distribution symmetrically; The coil of the first high-voltage relay, the second high-voltage relay and third high potential relay all is connected with the output of relay drive circuit.
The input of described relay drive circuit is connected with pulsewidth command reception circuit.
Described the first pulse forming network comprises the first inductance, the second inductance, the 3rd inductance, the 4th inductance and the 5th inductance that connects successively; Two contacts of the first high-voltage relay are connected with the second inductance and the 3rd inductance corresponding end respectively, the first inductance is connected with the first electric capacity corresponding to the end that is connected with the second inductance, the second inductance is connected with the second electric capacity corresponding to the end that is connected with a contact of the first high-voltage relay, the 3rd inductance is connected with the 3rd electric capacity corresponding to the end that is connected with the 4th inductance, the 4th inductance is connected with the 4th electric capacity corresponding to the end that is connected with the 5th inductance, and the 5th inductance is connected with the 5th electric capacity corresponding to the other end that is connected with the 4th inductance; The first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity corresponding end connect into equipotential; The 5th inductance is connected with the contact of the second high-voltage relay corresponding to the end that is connected with the 5th electric capacity, another corresponding contact of the second high-voltage relay is connected with the 6th inductance, the 6th inductance and the 7th inductance, the 8th inductance are in series, the 8th inductance is connected with a contact of third high potential relay corresponding to the other end that is connected with the 7th inductance, another corresponding contact of third high potential relay is connected with the 9th inductance, and the 9th inductance and the tenth inductance are in series; The 6th inductance is connected with the 6th electric capacity corresponding to the end that is connected with the 7th inductance, the 7th inductance is connected with the 7th electric capacity corresponding to the end that is connected with the 8th inductance, and the 8th inductance is connected with the 8th electric capacity corresponding to the end that is connected with a contact of third high potential relay; The 9th inductance is connected with the 9th electric capacity corresponding to the end that is connected with the tenth inductance, the tenth inductance is connected with the tenth electric capacity corresponding to the other end that is connected with the 9th inductance, and the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity and the tenth electric capacity corresponding end connect into equipotential.Described the first inductance is connected with the positive terminal that is used for the high voltage source of the first pulse forming network and the charging of the second pulse forming network by the charging buffer circuit corresponding to the other end that is connected with the second inductance, and is connected with the negative pole end of high voltage source by discharge switch; The first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity correspondence connect into an equipotential end and are connected with the negative pole end of high voltage source; The 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity and the tenth electric capacity correspondence connect into an equipotential end and are connected with an end of pulse transformer primary coil, and the other end of pulse transformer primary coil is connected with the negative pole end of high voltage source; The secondary coil of pulse transformer is connected with microwave tube.
Described charging buffer circuit comprises charging inductance, and an end of described charging inductance is connected with the positive terminal of high voltage source, and the other end is connected with the anode tap of charging diode; The cathode terminal of charging diode is connected with the first inductance; The cathode terminal of charging diode also is connected with the negative pole end of high voltage source by discharge switch.
Described discharge switch comprises controllable silicon, and described silicon controlled anode tap is connected with cathode terminal and first inductance of charging diode, and the silicon controlled cathode terminal is connected with the negative pole end of high voltage source; The silicon controlled control end is connected with the circuits for triggering that are used for the control controlled silicon conducting.
The two ends of described discharge switch are parallel with for eliminating discharge does not mate the negative peak circuit that produces the negative peak energy.
Described negative peak circuit comprises the negative peak diode, and the anode tap of described negative peak diode is connected with the negative pole end of high voltage source by negative peak resistance, and the cathode terminal of negative peak diode is connected with the first inductance.
The primary coil of described pulse transformer is connected with the antihunt circuit that is used for elimination pulse transformer counter voltage.
Described antihunt circuit comprises damper diode, the cathode terminal of described damper diode is connected with the negative pole end of high voltage source by damping resistance, the anode tap of damper diode connects into an equipotential end with the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity and the tenth electric capacity and is connected, and connects into equipotential with the corresponding end of pulse transformer primary coil; The cathode terminal of damper diode connects into equipotential by damping resistance and the corresponding other end of pulse transformer primary coil.
Advantage of the present invention: by the second high-voltage relay K2, the first pulse forming network and the second pulse forming network that the Blumlein pulse forming network distributes are symmetrically separated in the Blumlein pulse forming network, the network configuration that is separated into by third high potential relay K3 in the network configuration that is separated into by the first high-voltage relay K1 in the first pulse forming network and the second pulse forming network is corresponding; Change joint number in the Blumlein pulse forming network by the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3, thereby change the Blumlein pulse forming network to the pulse duration of pulse transformer discharge output; Satisfy the requirement of different pulse duration work, can adapt to the job requirement of Doppler radar; Adapt with existing Digitized Weather Radar System, simple in structure, easy to install, applied widely, reduced the improvement cost of Digitized Weather Radar System, safe and reliable.
Description of drawings
Fig. 1 is use state schematic diagram of the present invention.
Fig. 2 a ~ Fig. 2 i is Blumlein pulse forming network coupling discharge waveform figure.
Fig. 3 is that the discharge schematic diagram is mated in the present invention.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As shown in Figure 1: the present invention includes high voltage source 1, charging buffer circuit 2, discharge switch 3, circuits for triggering 4, Blumlein pulse forming network 5, pulsewidth command reception circuit 6, relay drive circuit 7, the first pulse forming network 8, negative peak circuit 9, antihunt circuit 10, pulse transformer 11, microwave tube 12, the second pulse forming network 13, the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3.
As shown in Figure 1: Blumlein pulse forming network 5 comprises some pulse forming network capacitors and the pulse forming network inductor that is complementary and arranges with described pulse forming network capacitor, pulse forming network inductor and pulse forming network capacitors count are complementary, form transmission line, utilize ripple transmits generation in transmission line time delay to form pulse duration.The drawback that can not adjust in order to adjust Blumlein pulse forming network 5 discharge pulse width, can not be suitable for the application requirements of Doppler radar, Blumlein pulse forming network 5 of the present invention is provided with the second high-voltage relay K2, pulse forming network inductor in the contact of the second high-voltage relay K2 and Blumlein pulse forming network 5 is connected, described the second high-voltage relay K2 separates two parts that Blumlein pulse forming network 5 distributes symmetrically, is respectively the first pulse forming network 8 and the second pulse forming network 13.After making the first pulse forming network 8 and the second pulse forming network 13 corresponding matching, Blumlein pulse forming network 5 can be exported different pulse durations, be provided with at least one first high-voltage relay K1 in the first pulse forming network 8, the contact of described the first high-voltage relay K1 is connected with the interior corresponding pulse forming network inductor of the first pulse forming network 8; Be provided with at least one third high potential relay K3 in the second pulse forming network 13, the contact of described third high potential relay K3 is connected with pulse forming network inductor in the second pulse forming network 13; And the second pulse forming network 13 is corresponding by the network configuration that the first high-voltage relay K1 is separated into the first pulse forming network 8 by the network configuration that third high potential relay K3 is separated into, thereby after making the first pulse forming network 8 and the second pulse forming network 13 corresponding matching, can export two kinds of different pulse durations.The coil of the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3 all is connected with the output of relay drive circuit 7, the coil that the signal of relay drive circuit 7 outputs can drive the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3 gets electric or dead electricity, and the contact of the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3 is moved accordingly.The input of relay drive circuit 7 is connected with pulsewidth command reception circuit 6, pulsewidth command reception circuit 6 is used for the pulse width signal of receiving radar signal processing system output, pulsewidth command reception circuit 6 is controlled simultaneously the contact of the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3 and is moved simultaneously by the relay drive circuit 7 corresponding signals of output.When needing Blumlein pulse forming network 5 can export how different pulse durations, only need to be at interior the first high-voltage relay K1 that respective numbers is set of the first pulse forming network 8, and at the interior third high potential relay K3 that respective amount is set of the second pulse forming network 13, and guarantee corresponding the getting final product of network configuration that network configuration that the first pulse forming network 8 is separated into by the first high-voltage relay K1 and the second pulse forming network 13 are separated into by third high potential relay K3.
the pulse forming network inductor of Blumlein pulse forming network 5 of the present invention comprises the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, the 4th inductance L 4, the 5th inductance L 5, the 6th inductance L 6, the 7th inductance L 7, the 8th inductance L 8, the 9th inductance L 9 and the tenth inductance L 10 that connects successively, the first inductance L 1 is connected with the first capacitor C 1 corresponding to the end that is connected with the second inductance L 2, the second inductance L 2 is connected with the second capacitor C 2 corresponding to the end that is connected with the 3rd inductance L 3, the 3rd inductance L 3 is connected with the 3rd capacitor C 3 corresponding to the end that is connected with the 4th inductance L 4, the 4th inductance L 4 is connected with the 4th capacitor C 4 corresponding to the end that is connected with the 5th inductance L 5, the 5th inductance L 5 is connected with the 5th capacitor C 5 corresponding to the end that is connected with the 6th inductance L 6, the 6th inductance L 6 is connected with the 6th capacitor C 6 corresponding to the end that is connected with the 7th inductance L 7, the 7th inductance L 7 is connected with the 7th capacitor C 7 corresponding to the end that is connected with the 8th inductance L 8, the 8th inductance L 8 is connected with the 8th capacitor C 8 corresponding to the end that is connected with the 9th inductance L 9, the 9th inductance L 9 is connected with the 9th capacitor C 9 corresponding to the end that is connected with the tenth inductance L 10, the tenth inductance L 10 is connected with the tenth capacitor C 10 corresponding to the other end that is connected with the 9th inductance L 9, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4 and the 5th capacitor C 5 corresponding end connect into equipotential, and the 6th capacitor C 6, the 7th capacitor C 7, the 8th capacitor C 8, the 9th capacitor C 9 and the tenth capacitor C 10 corresponding end connect into equipotential.The contact of the second high-voltage relay K2 is connected with the 6th inductance L 6 with the 5th inductance L 5 respectively, thereby Blumlein pulse forming network 5 first pulse forming networks 8 and the second pulse forming network 13 are separated.Wherein, the first pulse forming network 8 comprises that the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, the 4th inductance L 4 and the 5th inductance L 5, the second pulse forming networks 13 of series connection successively comprise the 6th inductance L 6, the 7th inductance L 7, the 8th inductance L 8, the 9th inductance L 9 and the tenth inductance L 10 of series connection successively; And the network configuration of the first pulse forming network 8 and the second pulse forming network 13 is symmetrical.The contact of the first high-voltage relay K1 is connected with the second inductance L 2 and the 3rd inductance L 3 respectively, the contact of third high potential relay K3 is connected with the 9th inductance L 9 with the 8th inductance L 8 respectively, and the first high-voltage relay K1 is connected with third high potential relay K3 by wire, guarantees pulse shaping inductor and pulse forming network capacitor in the second pulse forming network 13 are charged.being separated into network configuration by the first high-voltage relay K1 in the first pulse forming network 8 is: the first inductance L 1 and the second inductance L 2 are in series, the first inductance L 1 is connected with the first capacitor C 1 corresponding to the end that is connected with the second inductance L 2, the second inductance L 2 is connected with the second capacitor C 2 corresponding to the end that is connected with the first high-voltage relay K1 contact, the 3rd inductance L 3 is connected with the 3rd capacitor C 3 corresponding to the end that is connected with the 4th inductance L 4, the 4th inductance L 4 is connected with the 4th capacitor C 4 corresponding to the end that is connected with the 5th inductance L 5, the 5th inductance L 5 is connected with the 5th capacitor C 5 corresponding to the end that is connected with the second high-voltage relay K2 contact, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4 and the 5th capacitor C 5 corresponding end connect into equipotential, the network configuration that is separated into by third high potential relay K3 in the second pulse forming network 13 is: the 6th inductance L 6 and the 7th inductance L 7, the 8th inductance L 8 are in series, the 6th inductance L 6 is connected with the 6th capacitor C 6 corresponding to the end that is connected with the 7th inductance L 7, the 7th inductance L 7 is connected with the 7th capacitor C 7 corresponding to the end that is connected with the 8th inductance L 8, the 8th inductance L 8 is connected with the 8th capacitor C 8 corresponding to the end that is connected with third high potential relay K3, the 9th inductance L 9 is connected with the 9th capacitor C 9 corresponding to the end that is connected with the tenth inductance L 10, the tenth inductance L 10 is connected with the tenth capacitor C 10 corresponding to the other end that is connected with inductance L 9, the 6th capacitor C 6, the 7th capacitor C 7, the 8th capacitor C 8, the 9th capacitor C 9 and the tenth capacitor C 10 corresponding end connect into equipotential, thereby can find out that the first pulse forming network 8 is corresponding by the network configuration that third high potential relay K3 is separated into the second pulse forming network 13 by the network configuration that the first high-voltage relay K1 is separated into.
The first inductance L 1 is connected with the positive terminal of high voltage source 1 by charging buffer circuit 2 corresponding to the other end that is connected with the second inductance L 2, and is connected with the negative pole end of high voltage source 1 by discharge switch 3; High voltage source 1 is high-voltage DC power supply.Charging buffer circuit 2 comprises charging inductance L11, the end of described charging inductance L11 is connected with the positive terminal of high voltage source 1, the other end of charging inductance L11 is connected with the anode tap of charging diode VD1, and the cathode terminal of charging diode VD1 is connected with the first inductance L 1.Discharge switch 3 comprises controllable silicon, and described silicon controlled anode tap is connected with the cathode terminal of charging diode VD1, and is connected with the first inductance L 1; The silicon controlled cathode terminal is connected with the negative pole end of high voltage source 1; The silicon controlled control end is connected with circuits for triggering 4, and circuits for triggering 4 make discharge switch 3 conductings under radar master trigger impulse is synchronous.In order to eliminate the negative peak energy that produces when Blumlein pulse forming network 5 does not mate discharge, the two ends of discharge switch 3 are parallel with negative peak circuit 9, negative peak circuit 9 comprises negative peak diode VD2, the anode tap of described negative peak diode VD2 is connected with the negative pole end of high voltage source 1 by negative peak resistance R 1, and the cathode terminal of negative peak diode VD2 is connected with cathode terminal and the silicon controlled anode tap of the first inductance L 1, charging diode VD1.The first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4 and the 5th capacitor C 5 correspondences connect into equipotential end and are connected with the negative pole end of high voltage source 1, the negative pole end ground connection of high voltage source 1.The 6th capacitor C 6, the 7th capacitor C 7, the 8th capacitor C 8, the 9th capacitor C 9 and the tenth capacitor C 10 correspondences connect into equipotential end and are connected with the negative pole end of high voltage source 1 by antihunt circuit 10, and are connected with an end of pulse transformer 11 primary coils.Damping resistance 10 comprises damper diode VD3, the cathode terminal of damper diode VD3 is connected with the negative pole end of high voltage source 1 by damping resistance R2, simultaneously corresponding with the 6th capacitor C 6, the 7th capacitor C 7, the 8th capacitor C 8, the 9th capacitor C 9 and the tenth capacitor C 10 end that connects into equipotential end and pulse transformer 11 primary coils of the anode tap of damper diode VD3 is connected, and the other end of pulse transformer 11 primary coils is connected with the negative pole end of high voltage source 1.The secondary coil of pulse transformer 11 is connected with microwave tube 12.
When 1 pair of the first pulse forming network 8 of high voltage source and the second pulse forming network 13 charging, the pulse forming network capacitor in charging buffer circuit 2 in charging inductance L11 and the first pulse forming network 8 and the second pulse forming network 13 forms resonant charging; After the first pulse forming network 8 and the charging of the second pulse forming network 13 were completed, during conducting, the first pulse forming network 8 was exported pulse energies by discharge switch 3 to pulse transformer 11 with the second pulse forming network 13 to discharge switch 3 under circuits for triggering 4 effects.Antihunt circuit 10 is used for eliminating the counter voltage at pulse transformer 11 two ends, and can accelerate the shutoff of discharge switch 3; Pulse transformer 11 is used for transmission pulse power and carries out impedance transformation, and the pulse power of pulse transformer 11 transmission is by microwave tube 12 outputs.
Be conventional Blumlein pulse forming network coupling discharge waveform figure as Fig. 2 a ~ Fig. 2 i.Wherein, Fig. 2 a is Blumlein discharge equivalent electric circuit and coupling discharge waveform, and the Blumlein pulse forming network is based on transmission line theory; The Blumlein pulse forming network can be divided into the first boostrap PFN1 and the second boostrap PFN2.when the Blumlein pulse forming network by the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, the 4th inductance L 4, the 5th inductance L 5, the 6th inductance L 6, the 7th inductance L 7, the 8th inductance L 8, the 9th inductance L 9, the tenth inductance L 10 and the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the 7th capacitor C 7, the 8th capacitor C 8, the 9th capacitor C 9, the tenth capacitor C 10 Corresponding matchings arrange when consisting of, the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, the 4th inductance L 4, the 5th inductance L 5 and the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th 5 of capacitor C connect and compose the first boostrap PFN1, the 6th inductance L 6, the 7th inductance L 7, the 8th inductance L 8, the 9th inductance L 9, the tenth inductance L 10 and the 6th capacitor C 6, the 7th capacitor C 7, the 8th capacitor C 8, the 9th capacitor C 9, the tenth 10 of capacitor C connect and compose the second boostrap PFN2.The first boostrap PFN1 is identical with the equivalent length L of the second boostrap PFN2, and characteristic impedance ρ equates; The first boostrap PFN1 connects with the second boostrap PFN2 to the primary coil winding discharge of pulse transformer 11.The equivalent resistance R of pulse transformer 11 primary coil armature windings
LBe one and mix build-out resistor, its value is relevant with the radiation impedance of pulse transformer 11 secondary coil secondary winding, and design load is 2 ρ.Discharge switch 3 is connected on the top of the first boostrap PFN1; Before discharge switch 3 was connected, 1 couple of the first boostrap PFN1 of high voltage source and the second boostrap PFN2 charging made the first boostrap PFN1 all fill with the two ends of the second boostrap PFN2 the voltage E that equates with.The wait discharge condition of whole discharge equivalent electric circuit as shown in Fig. 2 b, load resistance R
LBoth end voltage is zero.
When time t=0 moment, discharge switch 3 is connected, the top voltage of the first boostrap PFN1 is reduced to zero volt immediately, discharge, an amplitude is arranged, and (top is the end near discharge switch 3 with filling incident wave voltage-E that voltage equates top terminad transmission from the first boostrap PFN1 with, end is the end away from discharge switch 3), transmission speed is v, the voltage E payment of when incident wave voltage-E transmits, the first boostrap PFN1 being filled with originally.According to long-line theory, length by the transmission line of L to the one way of transmission electric wave equal L/V time of delay, Fig. 2 c represents the state of L/V＞t＞0 o'clock discharge circuit, not discharge of the second boostrap PFN2 this moment, load resistance R
LTerminal voltage be still zero.
T=L/V moment, incident wave--E arrives the end of the first boostrap PFN1, and the upper voltage of the first boostrap PFN1 is zero, load resistance R
LBoth end voltage jumps and is E, as shown in Fig. 2 d.
The state of discharge equivalent electric circuit when Fig. 2 e represents 2L/V＞t＞L/V; The load impedance Z that connects due to the end at the first boostrap PFN1
LLoad resistance R
LThe characteristic impedance sum of (namely mixing build-out resistor) and the second boostrap PFN2, i.e. Z
L=R
L+ ρ=3 ρ, so the reflection coefficient of the first boostrap PFN1 end is:
γ=(Z
L--ρ)/(Z
L+ρ)=1/2； （1）
The incident wave of the first boostrap PFN1--E reflects endways, and the amplitude of reflected wave is 1/2 of incident wave, and polarity is identical.So, there is one on the first boostrap PFN1 during this period--E/2 voltage reflection ripple is transmitted to top by its end; And one-E/2 voltage incident wave is arranged on the second boostrap PFN2, (top of the second boostrap PFN2 is an end of contiguous the first boostrap PFN1 end by its top terminad transmission, the end of the second boostrap PFN2 is the end away from the first boostrap PFN1 end),--during the transmission of E/2 voltage reflection ripple, the voltage E that originally filled with on the second boostrap PFN2 is offset half.This just forms the general layout of double work alignment load discharge, load resistance R
LBoth end voltage remains E.
T=2L/V moment, the reflected wave of the first boostrap PFN1-E/2 arrives top, and the first boostrap PFN1 full line voltage is--E/2; The incident wave of the second boostrap PFN2-E/2 arrives end, and the second boostrap PFN2 full line voltage is E/2.Load resistance R
LBoth end voltage remains E, and the state of discharge equivalent electric circuit is as shown in Fig. 2 f.
The state of discharge equivalent electric circuit when Fig. 2 g represents 3L/V＞t＞2L/V.Generation total reflection that reflected wave on the first boostrap PFN1--E/2 (is discharged the switch short circuit) at its top, reflection coefficient γ=--1, the secondary voltage reflected wave is E/2, the voltage that makes the first boostrap PFN1 top (closed circuit end) is zero, and the terminad transmission; And incident wave--total reflection occurs at the end (open end) of the second boostrap PFN2 in E/2, reflection coefficient γ=1, and the voltage reflection ripple is-E/2, to the top transmission of the second boostrap PFN2, load resistance R
LBoth end voltage remains E.
T=3L/V moment, the upper secondary voltage reflected wave of the first boostrap PFN1 arrives end, and the reflected wave on the second boostrap PFN2-E/2 arrives top, and it is zero that the voltage on two boostraps all is cancelled, discharge process end, load resistance R
LBoth end voltage also bust is zero.Discharge the state of equivalent electric circuit as shown in Fig. 2 h this moment.
In sum: the discharge of two boostrap coupling, be that L, characteristic impedance are that two boostraps of ρ are together in series by equivalent length, after they fill voltage E with, under the discharge trigger impulse is controlled, discharge to matched load, can obtain amplitude in load is that E, width are the rectangular pulse of 2L/V, forward position hysteresis discharge trigger impulse forward position L/V, as figure
2iShown in.Adopt the modulator of this system, the time of the forward position hysteresis discharge trigger impulse of radar transmitted pulse is L/V.
Can obtain the equiva lent impedance R of pulse transformer 11 according to Fig. 2 a ~ Fig. 2 i
LThe voltage at two ends is difference along with the difference of Blumlein PFN Discharge process, but the equiva lent impedance R of pulse transformer 11
LThe voltage at two ends remains at voltage E in discharge process, discharge finishes and discharges when beginning, the equiva lent impedance R of Pulse Electric depressor 11
LThe voltage at two ends is all 0, and namely Blumlein pulse forming network 5, can only be to the energy of pulse transformer 11 output Sing plus width when charging finishes to discharge.
As shown in Figure 3: be that the two pulsewidths of the two boostraps of the present invention switch coupling discharge equivalent electric circuits, its first pulse forming network 8 and the second pulse forming network 13 discharge and recharge operation principle and conventional Blumlein pulse forming network 5 to discharge and recharge work basic identical.When the closing of contact of the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3, the first pulse forming network 8 and the second corresponding cooperation of pulse forming network 13, making the primary coil two ends formation pulse duration of pulse transformer 11 is that 2L/V( namely discharges and recharges identical with conventional Blumlein pulse forming network 5).When the contact of the first high-voltage relay K1, the second high-voltage relay K2, third high potential relay K3 disconnects, Blumlein pulse forming network 5 is separated into independently by the second high-voltage relay K2, and the first pulse forming network 8 and the second pulse forming network 13, the first pulse forming networks 8 and the second pulse forming network 13 can only be the burst pulse of L/V to the primary coil output pulse width of pulse transformer 11.By disconnection or the closure of the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3 contact, adjust the joint number of Blumlein pulse forming network, thereby change to the pulse duration of pulse transformer 11 outputs; Reach the requirement of Doppler radar work.
As shown in Figure 1: the course of work is: during charging, and circuits for triggering 4 no-outputs, discharge switch 3 is in off state, and high voltage source 1 is charged to Blumlein pulse forming network 5 by isolation charging circuit 2.During charging, the charging inductance L11 in charging buffer circuit 2 and the pulse forming network capacitor in Blumlein pulse forming network 5 form resonant charging.During discharge, circuits for triggering 4 make discharge switch 3 conductings to discharge switch 3 Continuity signals.The pulse duration requirement different according to pulse transformer 11, Radar Signal Processing System sends the pulsewidth command signal to pulsewidth command reception circuit 6, and pulsewidth command reception circuit 6 moves simultaneously by the contact that relay drive circuit 7 drives the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3 simultaneously.When the closing of contact of the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3, to the wider pulse of pulse transformer 11 output pulse widths; When the contact of the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3 disconnects, to the narrower pulse of pulse transformer 11 output pulse widths, realize the conversion of different pulse durations.Pulse transformer 11 rising modulating pulse voltages are added on microwave tube 12, the excitation microwave tube 12 high merit microwave energies of work output.
The present invention is separated into Blumlein pulse forming network 5 symmetrically the interior network configuration that is separated into by third high potential relay K3 of the network configuration that is separated into by the first high-voltage relay K1 in the first pulse forming network 8 of distributing and the second pulse forming network 13, the first pulse forming networks 8 and the second pulse forming network 13 by the second high-voltage relay K2 in Blumlein pulse forming network 5 corresponding; Change the interior joint number of Blumlein pulse forming network 5 by the first high-voltage relay K1, the second high-voltage relay K2 and third high potential relay K3, thereby change Blumlein pulse forming network 5 to the pulse duration of pulse transformer 11 outputs; Satisfy the requirement of different pulse duration work, can adapt to the job requirement of Doppler radar; Adapt with existing Digitized Weather Radar System, simple in structure, easy to install, applied widely, reduced the improvement cost of Digitized Weather Radar System, safe and reliable.
Claims (10)
1. circuit structure for transforming pulse width, comprise Blumlein pulse forming network (5), described Blumlein pulse forming network (5) comprises some pulse forming network capacitors and the pulse forming network inductor that is complementary and arranges with described pulse forming network capacitor; It is characterized in that: described Blumlein pulse forming network (5) is provided with the second high-voltage relay (K2), the contact of described the second high-voltage relay (K2) upward is connected corresponding inductor end with Blumlein pulse forming network (5), and Blumlein pulse forming network (5) is separated into the first pulse forming network (8) and the second pulse forming network (13) that distributes symmetrically; Be provided with at least one first high-voltage relay (K1) in described the first pulse forming network (8), in the contact of described the first high-voltage relay (K1) and the first pulse forming network (8), corresponding pulse forming network inductor end is connected; Be provided with at least one third high potential relay (K3) in the second pulse forming network (13), in the contact of described third high potential relay (K3) and the second pulse forming network (13), corresponding pulse forming network inductor end is connected; Third high potential relay (K3) and the corresponding layout of the first high-voltage relay (K1) make the interior pulse network structure that is separated into by the first high-voltage relay (K1) of the pulse network structure that is separated into by third high potential relay (K3) in the second pulse forming network (13) and the first pulse forming network (8) corresponding with the structure of distribution symmetrically; The coil of the first high-voltage relay (K1), the second high-voltage relay (K2) and third high potential relay (K3) all is connected with the output of relay drive circuit (7).
2. circuit structure for transforming pulse width according to claim 1, it is characterized in that: the input of described relay drive circuit (7) is connected with pulsewidth command reception circuit (6).
3. circuit structure for transforming pulse width according to claim 1 is characterized in that: described the first pulse forming network (8) comprises the first inductance (L1), the second inductance (L2), the 3rd inductance (L3), the 4th inductance (L4) and the 5th inductance (L5) that connects successively, two contacts of the first high-voltage relay (K1) are connected the end accordingly with the second inductance (L2) and the 3rd inductance (L3) respectively, the first inductance (L1) is connected with the first electric capacity (C1) corresponding to the end that is connected with the second inductance (L2), the second inductance (L2) is connected with the second electric capacity (C2) corresponding to the end that is connected with a contact of the first high-voltage relay (K1), the 3rd inductance (L3) is connected with the 3rd electric capacity (C3) corresponding to the end that is connected with the 4th inductance (L4), the 4th inductance (L4) is connected with the 4th electric capacity (C4) corresponding to the end that is connected with the 5th inductance (L5), the 5th inductance (L5) is connected with the 5th electric capacity (C5) corresponding to the other end that is connected with the 4th inductance (L4), the corresponding end of the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4) and the 5th electric capacity (C5) connects into equipotential, the 5th inductance (L5) is connected with the contact of the second high-voltage relay (K2) corresponding to the end that is connected with the 5th electric capacity (C5), another corresponding contact of the second high-voltage relay (K2) is connected with the 6th inductance (L6), the 6th inductance (L6) and the 7th inductance (L7), the 8th inductance (L8) is in series, the 8th inductance (L8) is connected with a contact of third high potential relay (K3) corresponding to the other end that is connected with the 7th inductance (L7), another corresponding contact of third high potential relay (K3) is connected with the 9th inductance, the 9th inductance (L9) is in series with the tenth inductance (L10), the 6th inductance (L6) is connected with the 6th electric capacity (C6) corresponding to the end that is connected with the 7th inductance (L7), the 7th inductance (L7) is connected with the 7th electric capacity (C7) corresponding to the end that is connected with the 8th inductance (L8), and the 8th inductance (L8) is connected with the 8th electric capacity (C8) corresponding to the end that is connected with a contact of third high potential relay (K3), the 9th inductance (L9) is connected with the 9th electric capacity (C9) corresponding to the end that is connected with the tenth inductance (L10), the tenth inductance (L10) is connected with the tenth electric capacity (C10) corresponding to the other end that is connected with the 9th inductance (L9), and the 6th electric capacity (C6), the 7th electric capacity (C7), the 8th electric capacity (C8), the 9th electric capacity (C9) and the tenth electric capacity (C10) connect into equipotential in the end accordingly.
4. circuit structure for transforming pulse width according to claim 3, it is characterized in that: described the first inductance (L1) is connected with the positive terminal that is used for the high voltage source (1) of the first pulse forming network (8) and the second pulse forming network (13) charging by charging buffer circuit (2) corresponding to the other end that is connected with the second inductance (L2), and passes through discharge switch (3) and be connected with the negative pole end of high voltage source (1); The first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4) and the 5th electric capacity (C5) correspondence connect into an equipotential end and are connected with the negative pole end of high voltage source (1); The 6th electric capacity (C6), the 7th electric capacity (C7), the 8th electric capacity (C8), the 9th electric capacity (C9) and the tenth electric capacity (C10) correspondence connect into an equipotential end and are connected with an end of pulse transformer (11) primary coil, and the other end of pulse transformer (11) primary coil is connected with the negative pole end of high voltage source (1); The secondary coil of pulse transformer (11) is connected with microwave tube (12).
5. circuit structure for transforming pulse width according to claim 4, it is characterized in that: described charging buffer circuit (2) comprises charging inductance (L11), one end of described charging inductance (L11) is connected with the positive terminal of high voltage source (1), and the other end is connected with the anode tap of charging diode (VD1); The cathode terminal of charging diode (VD1) is connected with the first inductance (L1); The cathode terminal of charging diode (VD1) also is connected with the negative pole end of high voltage source (1) by discharge switch (3).
6. circuit structure for transforming pulse width according to claim 5, it is characterized in that: described discharge switch (3) comprises controllable silicon, described silicon controlled anode tap is connected with cathode terminal and first inductance (L1) of charging diode (VD1), and the silicon controlled cathode terminal is connected with the negative pole end of high voltage source (1); The silicon controlled control end is connected with the circuits for triggering (4) that are used for the control controlled silicon conducting.
7. circuit structure for transforming pulse width according to claim 4 is characterized in that: the two ends of described discharge switch (3) are parallel with for eliminating discharge does not mate the negative peak circuit (9) that produces the negative peak energy.
8. circuit structure for transforming pulse width according to claim 7, it is characterized in that: described negative peak circuit (9) comprises negative peak diode (VD2), the anode tap of described negative peak diode (VD2) is connected with the negative pole end of high voltage source (1) by negative peak resistance (R1), and the cathode terminal of negative peak diode (VD2) is connected with the first inductance (L1).
9. circuit structure for transforming pulse width according to claim 4 is characterized in that: the primary coil of described pulse transformer (11) is connected with the antihunt circuit (10) that is used for eliminating pulse transformer (11) counter voltage.
10. circuit structure for transforming pulse width according to claim 9, it is characterized in that: described antihunt circuit (10) comprises damper diode (VD3), the cathode terminal of described damper diode (VD3) is connected with the negative pole end of high voltage source (1) by damping resistance (R2), the anode tap of damper diode (VD3) and the 6th electric capacity (C6), the 7th electric capacity (C7), the 8th electric capacity (C8), the 9th electric capacity (C9) and the tenth electric capacity (C10) connect into an equipotential end and are connected, and connect into equipotential with the corresponding end of pulse transformer (11) primary coil, the cathode terminal of damper diode (VD3) connects into equipotential by damping resistance (R2) and the corresponding other end of pulse transformer (11) primary coil.
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| US20140327426A1 (en) * | 2012-01-05 | 2014-11-06 | Lightsquare Ltd. | Pulse forming network (pfn) having multiple capacitor units for forming a pulse having a multi-level voltage and a method of forming such a pulse |
| CN106385244B (en) * | 2016-11-18 | 2019-07-16 | 许继电源有限公司 | A kind of fast rise time nanosecond high pressure electrooptical switching driving source |
| CN108900178B (en) * | 2018-06-13 | 2022-05-31 | 中国工程物理研究院应用电子学研究所 | Composite long pulse forming network |
| CN111064451B (en) * | 2019-12-31 | 2022-05-17 | 西南交通大学 | BlumLEIN pulse forming line with reverse suppression |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4024430A (en) * | 1975-09-29 | 1977-05-17 | The United States Of America As Represented By The Secretary Of The Army | Modulator and clamper for variable impedance load |
| US4099128A (en) * | 1976-08-13 | 1978-07-04 | Westinghouse Electric Corp. | Line type modulator for providing stepwise variable pulse width |
| FR2529038B1 (en) * | 1982-06-19 | 1985-11-15 | Ferranti Plc | PULSE GENERATOR CIRCUIT |
| WO2001011732A1 (en) * | 1999-08-09 | 2001-02-15 | Cymer, Inc. | High pulse rate pulse power system with liquid cooling |
| CN101015107A (en) * | 2004-07-02 | 2007-08-08 | 斯勘的诺维亚***公司 | Electrical power switching with efficient switch protection |
| CN101745178A (en) * | 2009-12-17 | 2010-06-23 | 重庆大学 | Portable high-voltage nanosecond squarer |
| CN202059329U (en) * | 2011-03-11 | 2011-11-30 | 江苏北方电子有限公司 | Circuit structure for transforming pulse width |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08313619A (en) * | 1995-05-22 | 1996-11-29 | Tokimec Inc | Pulse modulator for radar |
-
2011
- 2011-03-11 CN CN 201110059172 patent/CN102158074B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4024430A (en) * | 1975-09-29 | 1977-05-17 | The United States Of America As Represented By The Secretary Of The Army | Modulator and clamper for variable impedance load |
| US4099128A (en) * | 1976-08-13 | 1978-07-04 | Westinghouse Electric Corp. | Line type modulator for providing stepwise variable pulse width |
| FR2529038B1 (en) * | 1982-06-19 | 1985-11-15 | Ferranti Plc | PULSE GENERATOR CIRCUIT |
| WO2001011732A1 (en) * | 1999-08-09 | 2001-02-15 | Cymer, Inc. | High pulse rate pulse power system with liquid cooling |
| CN101015107A (en) * | 2004-07-02 | 2007-08-08 | 斯勘的诺维亚***公司 | Electrical power switching with efficient switch protection |
| CN101745178A (en) * | 2009-12-17 | 2010-06-23 | 重庆大学 | Portable high-voltage nanosecond squarer |
| CN202059329U (en) * | 2011-03-11 | 2011-11-30 | 江苏北方电子有限公司 | Circuit structure for transforming pulse width |
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