CN203800907U - W-wave-band pulse travelling wave tube large power synthesis system - Google Patents
W-wave-band pulse travelling wave tube large power synthesis system Download PDFInfo
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- CN203800907U CN203800907U CN201420203641.2U CN201420203641U CN203800907U CN 203800907 U CN203800907 U CN 203800907U CN 201420203641 U CN201420203641 U CN 201420203641U CN 203800907 U CN203800907 U CN 203800907U
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Abstract
The utility model belongs to the microwave millimeter wave technology field and particularly relates to a W-wave-band pulse travelling wave tube large power synthesis system. The W-wave-band pulse travelling wave tube large power synthesis system comprises a waveguide power divider, a first adjustable attenuator, a first solid state amplifier, a first isolator, a first travelling wave tube amplifier, a second adjustable attenuator, a phase shifter, a second solid state amplifier, a second isolator, a second travelling wave tube amplifier and a waveguide power synthesizer. The W-wave-band pulse travelling wave tube large power synthesis system realizes big power synthesis of two paths of the pulse travelling wave tubes in the W-wave-band; the two paths are both provided with the isolators, which guarantees that the solid state simplifiers are not burnt out; the W-wave-band pulse travelling wave tube large power synthesis system adopts the power divider, the output phase difference of which is 90 degrees, to divide one power source into two, and the phase difference of the two paths is 90 degrees, which prevents the interference and self-excitation between the two paths of travelling wave tube amplifiers; and the phase difference between the two inputs of the power synthesizer is designated to be -90 degrees, which guarantees the effective synthesis of the two paths of power.
Description
Technical field
The utility model belongs to microwave and millimeter wave technical field, is specifically related to the high-power synthesis system of a kind of W wave band pulsed TWT.
Background technology
In modern microwave millimetre-wave radar system, radar emission power is a very important index weighing radar system performance, and the raising of transmitting power means that radar has larger radius of investigation and stronger antijamming capability.For pursuing the high-power transmitting of full coherent pulse radar and imaging radar, the electron tube that the travelling-wave tube amplifier of take is representative is widely used in the transmitter system of such radar.Because basic conditions such as being subject to technique and material limits, single travelling-wave tube amplifier output pulse power can only reach 100-150W left and right at present, is difficult to meet the requirement of millimetre-wave radar system to high-power transmitting.And solve one of the most direct and effective approach of problems, be exactly to adopt high-power synthetic technology.Power synthetic technique mainly divides four large classes: chip-shaped, and single chamber type, spatial mode and compound.In the situation that being synthesized device count minimizing, single chamber type power synthetic technique, due to its simple in structure and higher combined coefficient, is widely used.
Extensive use along with pulse system millimetre-wave radar, the research of pulse power synthetic technology has also caused the concern of Many researchers, be not both with continuous wave power is synthetic, the power output that pulse power is synthetic and efficiency are subject to the impact of the factors such as time delay between two-way composite signal.In addition, rising along with frequency, the volume of device significantly reduces, technological requirement to the precision of processing and processing is higher, these have all increased the design difficulty of system, yet the technological difficulties of whole system maximum are how to prevent the self-excitation of High Gain Tw T amplifier and pouring in down a chimney of travelling-wave tube amplifier output electromagnetic wave energy, because will there is burning of travelling-wave tube amplifier in the case.With regard to the situation of current investigation, all find no the high-power synthetic report of succeeding in developing of high-power W wave band pulsed TWT amplifier both at home and abroad.
Summary of the invention
The utility model provides a kind of W wave band pulsed TWT high-power synthesis system, has realized technically the high-power synthetic of W wave band two-way pulsed TWT, and two-way is all provided with isolator, can guarantee that solid-state amplifier is not burnt; The utility model adopts the power divider of phase difference output 90 degree that same signal source power is divided into two, between two-way, there are 90 degree phase differences, to prevent interference and the self-excitation between two-way travelling-wave tube amplifier, two inputs of power combiner are designed to the phase difference of-90 degree, to ensure the effectively synthetic of two-way power; Two inputs of the utility model power combiner adopt high isolation design circuit, to prevent that pouring in down a chimney of two-way amplifier output power from burning travelling-wave tube amplifier; When the utility model two paths of signals phase phasic difference 90 is spent, the synthetic optimum state that reaches of power, wherein a road is provided with phase shifter for this reason, the phase difference being produced with compensation two-way waveguide transmission line difference in length etc., the signal of two-way quadrature is amplified into waveguide power combiner through travelling-wave tube amplifier and synthesizes, obtain high-power synthetic output, regulate phase shifter, make the power output of system reach maximum; The utility model has adopted pulse modulation time delay technology, by pulse-generating circuit, produce two-way modulating pulse, one tunnel pulse is directly modulated a road travelling-wave tube amplifier wherein, another road pulse is modulated another road travelling wave tube after time delay control circuit, regulate time delay circuit that two paths of signals is superposeed at synchronization, make the pulse power of output reach maximum; The utility model can be applicable to W band radar, and the radar emission that can be multiplied power makes W band high-power radar become possibility, thereby promotes radar range and detection accuracy, strengthens interference free performance, has huge society and economic benefit.
Technical solutions of the utility model are as follows:
The high-power synthesis system of a kind of W wave band pulsed TWT, it is characterized in that, comprise waveguide power divider, the first adjustable attenuator, the first solid-state amplifier, the first isolator, the first travelling-wave tube amplifier, the second adjustable attenuator, phase shifter, the second solid-state amplifier, the second isolator, the second travelling-wave tube amplifier and waveguide power combiner; Described waveguide power divider connects respectively the first adjustable attenuator and the second adjustable attenuator; Described the first adjustable attenuator, the first solid-state amplifier, the first isolator and the first travelling-wave tube amplifier are connected successively; Described the second adjustable attenuator, phase shifter, the second solid-state amplifier, the second isolator and the second travelling-wave tube amplifier are connected successively; Described the first travelling-wave tube amplifier is all connected with waveguide power combiner with the second travelling-wave tube amplifier.
Also comprise matched load, time delay control circuit, pulse-generating circuit and high power load; Described matched load is connected with waveguide power divider; Described pulse-generating circuit, time delay control circuit and the first travelling-wave tube amplifier are connected successively; Described pulse-generating circuit also with the second travelling-wave tube amplifier is connected; Described high power load is connected with waveguide power combiner.
Described waveguide power divider is the waveguide power divider of phase difference output 90 degree; Described waveguide power combiner is the waveguide power combiner of poor-90 degree of input phase.
Described waveguide power divider comprises RF input, output and isolation output; Described output has several, and output is the output of phase difference output 90 degree, and wherein two outputs are connected with the second adjustable attenuator with the first adjustable attenuator respectively; Described isolation output is connected with matched load.
Described waveguide power combiner comprises RF output, input and isolation output; Described input has several, and input is the input of poor-90 degree of input phase, and wherein two inputs are connected with the second travelling-wave tube amplifier with the first travelling-wave tube amplifier respectively, and isolation output is connected with high power load.
Described the first adjustable attenuator and the second adjustable attenuator, the first solid-state amplifier and the second solid-state amplifier, the first isolator and the second isolator and the first travelling-wave tube amplifier and the second travelling-wave tube amplifier all adopt model of the same race or are not adjustable attenuator, solid-state amplifier, isolator and the travelling-wave tube amplifier of model of the same race.
The model that described adjustable attenuator adopts is XB-VA10, and the model that solid-state amplifier adopts is AV70217, and the model that phase shifter adopts is MI-WAVE 526W/387, the type MI-WAVE 115W/387 that isolator adopts.
the utility model beneficial effect is as follows:
1. the high-power synthesis system of the utility model W wave band pulsed TWT, has realized the high-power synthetic of W wave band two-way pulsed TWT technically, and two-way is all provided with isolator, can guarantee that solid-state amplifier is not burnt;
2. the high-power synthesis system of the utility model W wave band pulsed TWT, adopt the power divider of phase difference output 90 degree that same signal source power is divided into two, between two-way, there are 90 degree phase differences, to prevent interference and the self-excitation between two-way travelling-wave tube amplifier, two inputs of power combiner are designed to the phase difference of-90 degree, to ensure the effectively synthetic of two-way power;
3. the high-power synthesis system of the utility model W wave band pulsed TWT, two inputs of power combiner adopt high isolation design circuit, to prevent that pouring in down a chimney of two-way amplifier output power from burning travelling-wave tube amplifier;
4. the high-power synthesis system of the utility model W wave band pulsed TWT, the synthetic optimum state that reaches of power when two paths of signals phase phasic difference 90 is spent, wherein a road is provided with phase shifter for this reason, the phase difference being produced with compensation two-way waveguide transmission line difference in length etc., the signal of two-way quadrature is amplified into waveguide power combiner through travelling-wave tube amplifier and synthesizes, obtain high-power synthetic output, regulate phase shifter, make the power output of system reach maximum;
5. the high-power synthesis system of the utility model W wave band pulsed TWT, adopted pulse modulation time delay technology, by pulse-generating circuit, produce two-way modulating pulse, one tunnel pulse is directly modulated a road travelling-wave tube amplifier wherein, another road pulse is modulated another road travelling wave tube after time delay control circuit, regulate time delay circuit that two paths of signals is superposeed at synchronization, make the pulse power of output reach maximum;
6. the high-power synthesis system of the utility model W wave band pulsed TWT, can be applicable to W band radar, the radar emission that can be multiplied power, make W band high-power radar become possibility, thereby promote radar range and detection accuracy, strengthen interference free performance, there is huge society and economic benefit.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is time delay control circuit figure.
Fig. 3 is experimental result picture of the present utility model.
In Fig. 2: A-input; B output.
Embodiment
As shown in Figure 1, the high-power synthesis system of the utility model W wave band pulsed TWT, comprises waveguide power combiner, matched load, time delay control circuit, pulse-generating circuit and the high power load of poor-90 degree of waveguide power divider, the first adjustable attenuator, the first solid-state amplifier, the first isolator, the first travelling-wave tube amplifier, the second adjustable attenuator, phase shifter, the second solid-state amplifier, the second isolator, the second travelling-wave tube amplifier, input phase of phase difference output 90 degree.
In Fig. 1, left branch road is: the first adjustable attenuator, the first solid-state amplifier, the first isolator, the first travelling-wave tube amplifier;
The output of the first adjustable attenuator is connected with the input of the first solid-state amplifier, and the first solid-state amplifier amplifies the output signal of the first adjustable attenuator, the signal after output is amplified;
The output of the first solid-state amplifier is connected with the input of the first isolator, allows signal forward to pass through, and stops echo-signal to enter the first solid-state amplifier, prevents that the first solid-state amplifier from being burnt;
The output of the first isolator is connected with the input of the first travelling-wave tube amplifier, and signal is carried out to power amplification.
In Fig. 1, right branch road is: the second adjustable attenuator, phase shifter, the second solid-state amplifier, the second isolator, the second travelling-wave tube amplifier;
The second adjustable attenuator output is connected with phase shifter input, and the output signal of the second adjustable attenuator is carried out phase shift through phase shifter, can adopt hand adjustment phase shifter, 0 ~ 360 ° of phase shift range;
The output of phase shifter is connected with the second solid-state amplifier input, the output signal of phase shifter is amplified to output amplifying signal;
The output of the second solid-state amplifier is connected with the input of the second isolator, and the second isolator allows signal forward to pass through, and stops echo-signal to enter solid-state amplifier and cause solid-state amplifier to burn.
The output of the second isolator is connected with the input of the second travelling-wave tube amplifier, and the signal of isolator output is carried out to power amplification.
Waveguide power divider comprises RF input, output and isolation output; Output has several, and output is the output of phase difference output 90 degree, and wherein two outputs are connected with the second adjustable attenuator with the first adjustable attenuator respectively; Isolation output is connected with matched load.Input signal enters after waveguide power divider by RF input, is divided into the signal of two-way quadrature in phase, enters respectively in the first adjustable attenuator and the second adjustable attenuator, and the signal that leaks into isolation end is absorbed by matched load.
Waveguide power combiner comprises RF output, input and isolation output; Input has several, and input is the input of poor-90 degree of input phase, and wherein two inputs are connected with the second travelling-wave tube amplifier with the first travelling-wave tube amplifier respectively, and isolation output is connected with high power load.The output of the first travelling-wave tube amplifier and the second travelling-wave tube amplifier is connected with two inputs of waveguide power combiner respectively, the isolation output of waveguide power combiner is connected with high power load, it is synthetic that the output signal ingoing power synthesizer of two-way travelling-wave tube amplifier carries out power, and the synthetic power of output, the signal that is leaked to isolation output is absorbed by high power load, and output signal is exported by RF output.
The utility model the first adjustable attenuator and the second adjustable attenuator, the first solid-state amplifier and the second solid-state amplifier, the first isolator and the second isolator and the first travelling-wave tube amplifier and the second travelling-wave tube amplifier all adopt model of the same race or are not adjustable attenuator, solid-state amplifier, isolator and the travelling-wave tube amplifier of model of the same race.
In the utility model, power divider used, adjustable attenuator, solid-state amplifier, phase shifter, isolator, travelling-wave tube amplifier, waveguide power combiner all do not require and are defined as concrete some models, so long as the above-mentioned device of W wave band.Can use following model: the model that adjustable attenuator adopts is XB-VA10, the model that solid-state amplifier adopts is AV70217, and the model that phase shifter adopts is MI-WAVE 526W/387, the type MI-WAVE 115W/387 that isolator adopts; Wherein power divider, travelling-wave tube amplifier and waveguide power combiner all can be made by oneself.
The utility model pulse-generating circuit, by signal generator, can adopt model 33220A signal generator, directly produces, and signal source output is directly received to the pulse modulation port of travelling-wave tube amplifier with BNC connector.Time delay produces circuit can utilize another signal generator, can adopt model 33250A signal generator, also can design a time delay circuit.If produce with signal generator, only need be by the external trigger end of another signal generator of received impulse signal 33250A of pulse-generating circuit 33220A signal generator output, by the delay adjusting function setting of 33250A signal generator inside, output is directly exported the time delay pulse of wanting, and directly receives the pulse modulation end of another travelling-wave tube amplifier with BNC connector; If impulse time delay circuit, circuit design method is not unique, as long as can realize, input pulse is postponed to a time t as requested, is illustrated in figure 2 wherein a kind of impulse time delay circuit design method, and wherein A represents input, and B represents output.
As shown in Figure 3, the experimental results of this system, as can be seen from the figure, the power output of waveguide power combiner is all greater than 177W, and peak power output reaches 194W.
Measuring process is as follows:
The test of this system is at room temperature carried out, RF incoming frequency is from 93.5-94.5GHz, because power waveguide synthesizer output output pulse power is higher, the measuring range that exceeds tester power meter, therefore RF output need connect measurement connector, be the directional coupler that the RF output termination degree of coupling is 33dB, the output termination high power load of directional coupler, the coupling termination power meter probe of directional coupler carries out power measurement; Before test, the vector network analyzer that Yong Jing authoritative institution was detected is tested calibration to measuring the loss of connector, from the output of waveguide power combiner to all connectors power meter probe, comprise that sizing coupler is with to be connected waveguide some, and utilize the loss of measuring connector to calibrate power meter, after completing, just can test measuring connector connecting system.
In order to calculate power output and combined coefficient, need to know the power of two inputs of waveguide power combiner and the power output of output thereof, therefore test need be carried out in two steps.The first step, input power measurement: connect each components and parts by system diagram, wherein waveguide power combiner and high power load do not connect, and time delay control circuit does not connect, first, by measuring connector, be connected with the output of the first travelling-wave tube amplifier, to measure the power output of the first travelling-wave tube amplifier, the decay of two adjustable attenuators is transferred to maximum, open RF input, radiofrequency signal is all assigned to two branch roads in left and right through waveguide power divider by radiofrequency signal, allow the first travelling-wave tube amplifier work of left branch road, first switch on power, preheating 5 minutes, the pulse that pulse-generating circuit is produced directly accesses the pulse modulation end of the first travelling-wave tube amplifier, the second travelling-wave tube amplifier of right branch road is not worked, keep pulse modulation end to disconnect, power down state, regulate the first adjustable attenuator, measure the power P of the first travelling-wave tube amplifier output
1, P
1for the power of output waveguide mouth, i.e. output connection waveguide loss is taken into account, until P
1reach maximum saturation state, keep a period of time, treat P
1stablize constantly, value now of record, is the power output of the first travelling-wave tube amplifier, turn-off pulse modulated terminal, closes the first row wave duct amplifier power supply, closes RF input, disconnects and measures connector, and keep other all device states of left branch road constant, by measuring connector, be connected with the output of the second travelling-wave tube amplifier, to measure the power output of the second travelling-wave tube amplifier, the same to the measuring process of right branch road, the power output P of measurement the second travelling wave tube
2, P
2comprise equally output and connect waveguide loss, disconnect and measure connector, and keep the state of right other devices of branch road constant.Second step, the synthetic output of power is measured: by waveguide power combiner and time delay control circuit connecting system, the output of two travelling-wave tube amplifiers is connected with the input of waveguide power combiner respectively, measuring connector is connected with the output of waveguide power combiner, open RF input, open the power supply of two travelling-wave tube amplifiers, preheating 5 minutes, the pulse of pulse-generating circuit output is accessed to the second travelling wave tube pulse modulation end, the pulse of time delay control circuit output is accessed to the pulse modulation end of the first travelling-wave tube amplifier, first regulate the phase shifter of right branch road, make power output P
outreach maximum, keep phase shifter constant, next regulates time delay circuit, again makes output power reach maximum, keeps a period of time, treats P
outstablize constantly, value now of record, is the power output of power synthetic system.
According to the computing formula of efficiency:
P
1and P
2be the power output of two travelling wave tube, P
outpower output for waveguide power combiner.What can calculate whole system efficiency is greater than 80%, and the highest combined coefficient can reach 85%.
The high-power synthesis system of the utility model W wave band pulsed TWT is verified, uses this technology to can be generalized in engineering application and goes.
The high-power synthesis system of the utility model W wave band pulsed TWT, has realized the high-power synthetic of W wave band two-way pulsed TWT technically, and two-way is all provided with isolator, can guarantee that solid-state amplifier is not burnt; The utility model adopts the power divider of phase difference output 90 degree that same signal source power is divided into two, between two-way, there are 90 degree phase differences, to prevent interference and the self-excitation between two-way travelling-wave tube amplifier, two inputs of power combiner are designed to the phase difference of-90 degree, to ensure the effectively synthetic of two-way power; Two inputs of the utility model power combiner adopt high isolation design circuit, to prevent that pouring in down a chimney of two-way amplifier output power from burning travelling-wave tube amplifier; When the utility model two paths of signals phase phasic difference 90 is spent, the synthetic optimum state that reaches of power, wherein a road is provided with phase shifter for this reason, the phase difference being produced with compensation two-way waveguide transmission line difference in length etc., the signal of two-way quadrature is amplified into waveguide power combiner through travelling-wave tube amplifier and synthesizes, obtain high-power synthetic output, regulate phase shifter, make the power output of system reach maximum; The utility model has adopted pulse modulation time delay technology, by pulse-generating circuit, produce two-way modulating pulse, one tunnel pulse is directly modulated a road travelling-wave tube amplifier wherein, another road pulse is modulated another road travelling wave tube after time delay control circuit, regulate time delay circuit that two paths of signals is superposeed at synchronization, make the pulse power of output reach maximum; The utility model can be applicable to W band radar, and the radar emission that can be multiplied power makes W band high-power radar become possibility, thereby promotes radar range and detection accuracy, strengthens interference free performance, has huge society and economic benefit.
Claims (7)
1. the high-power synthesis system of W wave band pulsed TWT, is characterized in that: comprise waveguide power divider, the first adjustable attenuator, the first solid-state amplifier, the first isolator, the first travelling-wave tube amplifier, the second adjustable attenuator, phase shifter, the second solid-state amplifier, the second isolator, the second travelling-wave tube amplifier and waveguide power combiner; Described waveguide power divider connects respectively the first adjustable attenuator and the second adjustable attenuator; Described the first adjustable attenuator, the first solid-state amplifier, the first isolator and the first travelling-wave tube amplifier are connected successively; Described the second adjustable attenuator, phase shifter, the second solid-state amplifier, the second isolator and the second travelling-wave tube amplifier are connected successively; Described the first travelling-wave tube amplifier is all connected with waveguide power combiner with the second travelling-wave tube amplifier.
2. the high-power synthesis system of W wave band pulsed TWT according to claim 1, is characterized in that: also comprise matched load, time delay control circuit, pulse-generating circuit and high power load; Described matched load is connected with waveguide power divider; Described pulse-generating circuit, time delay control circuit and the first travelling-wave tube amplifier are connected successively; Described pulse-generating circuit also with the second travelling-wave tube amplifier is connected; Described high power load is connected with waveguide power combiner.
3. the high-power synthesis system of W wave band pulsed TWT according to claim 1 and 2, is characterized in that: described waveguide power divider is the waveguide power divider of phase difference output 90 degree; Described waveguide power combiner is the waveguide power combiner of poor-90 degree of input phase.
4. the high-power synthesis system of W wave band pulsed TWT according to claim 3, is characterized in that: described waveguide power divider comprises RF input, output and isolation output; Described output has several, and output is the output of phase difference output 90 degree, and wherein two outputs are connected with the second adjustable attenuator with the first adjustable attenuator respectively; Described isolation output is connected with matched load.
5. the high-power synthesis system of W wave band pulsed TWT according to claim 4, is characterized in that: described waveguide power combiner comprises RF output, input and isolation output; Described input has several, and input is the input of poor-90 degree of input phase, and wherein two inputs are connected with the second travelling-wave tube amplifier with the first travelling-wave tube amplifier respectively, and isolation output is connected with high power load.
6. the high-power synthesis system of W wave band pulsed TWT according to claim 1, is characterized in that: described the first adjustable attenuator and the second adjustable attenuator, the first solid-state amplifier and the second solid-state amplifier, the first isolator and the second isolator and the first travelling-wave tube amplifier and the second travelling-wave tube amplifier all adopt model of the same race or be not adjustable attenuator, solid-state amplifier, isolator and the travelling-wave tube amplifier of model of the same race.
7. according to the high-power synthesis system of W wave band pulsed TWT described in claim 1 or 6, it is characterized in that: the model that described adjustable attenuator adopts is XB-VA10, the model that solid-state amplifier adopts is AV70217, the model that phase shifter adopts is MI-WAVE 526W/387, the type MI-WAVE 115W/387 that isolator adopts.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929158A (en) * | 2014-04-24 | 2014-07-16 | 南京信息工程大学 | W-waveband pulse traveling-wave tube high-power combination system |
| CN107515386A (en) * | 2016-06-15 | 2017-12-26 | 中国船舶重工集团公司第七二三研究所 | A kind of control protection module for Microwave Power Module |
-
2014
- 2014-04-24 CN CN201420203641.2U patent/CN203800907U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929158A (en) * | 2014-04-24 | 2014-07-16 | 南京信息工程大学 | W-waveband pulse traveling-wave tube high-power combination system |
| CN103929158B (en) * | 2014-04-24 | 2017-01-18 | 南京信息工程大学 | W-waveband pulse traveling-wave tube high-power combination system |
| CN107515386A (en) * | 2016-06-15 | 2017-12-26 | 中国船舶重工集团公司第七二三研究所 | A kind of control protection module for Microwave Power Module |
| CN107515386B (en) * | 2016-06-15 | 2020-10-20 | 中国船舶重工集团公司第七二三研究所 | Control protection module for microwave power module |
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