CN203422424U - X waveband high power microwave integrated radiation field measurement system - Google Patents
X waveband high power microwave integrated radiation field measurement system Download PDFInfo
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- CN203422424U CN203422424U CN201320209650.8U CN201320209650U CN203422424U CN 203422424 U CN203422424 U CN 203422424U CN 201320209650 U CN201320209650 U CN 201320209650U CN 203422424 U CN203422424 U CN 203422424U
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Abstract
The utility model provides an X waveband high power microwave integrated radiation field measurement system. After a high power microwave radiation field signal is received by an antenna, the signal goes through a waveguide attenuator for power attenuation, goes through a waveguide coaxial converter, and is successively transmitted to a program control attenuator and a coaxial attenuator for power attenuator, an envelope waveform of the signal is detected by a detector, acquired by a digital converter, and then is transmitted to a single-board computer, a monitoring computer monitors the digital converter and a temperature sensor by a fiber transceiver, and controls the digital converter and the program control attenuator. The X waveband high power microwave integrated radiation field measurement system is advantageous by integrated functions of electromagnetic protection, attenuation adjusting, signal detection, data acquisition and processing, remote monitoring, fiber data transmission, etc., compact structure, simpleness and easy carrying, facilitation of rapid external field measurement; also, the electromagnetic protection capability of the whole system is improved, the dynamic scope of measurement is widened, and higher adaptability for measuring radiation fields with different power levels is provided.
Description
Technical field
The present invention relates to a kind of high power microwave radiation field measurement device.
Background technology
High-Power Microwave outfield measuring system has important effect for work such as the parameter measurement in High-Power Microwave research, diagnosis.At present the basic comprising of high power microwave radiation field measurement system as document " Chen Yu. the research [D] of some problems in the method High-Power Microwave power measurement of far field. National University of Defense Technology's Master's thesis; 2005(P6～P7). " in mention, this type systematic forms and faces a following difficult problem: the one, there is the weak link of electromagnetic protection, and strong electromagnetic environment easily produces and disturbs measurement result; The 2nd, the connection that repeats that wave detector front end is brought in measuring system traverse measurement position, has caused impact to the reliability of its measurement result; The 3rd, do not possess Attenuation adjustable ability, measure dynamic range little.
Another kind of be measuring system based on Wave guide system probe coupling as document " Qu Jing; Liu Qing thinks; etc. Measurement system on power density of high power microwave radiation [J]. light laser and ion beam; 2004; 16 (1); 77～80. " described in, the type system is same to be existed and is subject to external electromagnetic field and disturbs and measure the problems such as dynamic range is little.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of X-band High-Power Microwave integrated radiation field measurement system, integrate the functions such as electromagnetic protection, damping capacity adjusting, signal demodulator, data acquisition and processing, remote monitoring and fiber count biography, compact conformation, easy portable (the about 10kg of weight), is easy to the rapid deployment of outer field measurement; Improve the electromagnetic protection ability of entire system, increased the dynamic range (being greater than 20dB) of measuring, to measuring the radiation field of different capacity level, had stronger adaptability.
The technical solution adopted for the present invention to solve the technical problems is: comprise antenna, waveguide attenuator, waveguide coaxial converter, programmable attenuator, coaxial attenuator, wave detector, digital quantizer, single-borad computer, fiber optical transceiver and supervisory control comuter.
High power microwave radiation field signal by antenna reception after, through waveguide attenuator, carry out power attenuation, (transmission line structure is changed into coaxial configuration by waveguiding structure through waveguide coaxial converter, to transfer to programmable attenuator, be beneficial to the volume that reduces rear end transmission line), (programmable attenuator can be realized the computer control of signal power damping capacity through programmable attenuator and coaxial attenuator, to carry out power attenuation successively again, coaxial attenuator conventionally uses with together with the wave detector of rear end, this geophone array structure has less standing wave, can reduce the amount of distortion of waveform detection), by wave detector, detected the envelope waveform of high power microwave radiation field signal, this envelope waveform sends to single-borad computer after being gathered by digital quantizer, calculate the power density of high power microwave radiation value of antenna present position, supervisory control comuter is the collection waveform to digital quantizer by fiber optical transceiver, the environment real time temperature of temperature sensor collection monitors, damping capacity to the parameter of digital quantizer and programmable attenuator is controlled.
The power density of high power microwave radiation value of described antenna present position
The power density of high power microwave radiation Zhi， unit of W---antenna present position: mW/cm
2;
G---antenna gain, unit: dB;
A
w---the damping capacity of waveguide attenuator, unit: dB;
IL
w-c---the insertion loss of waveguide coaxial converter, unit: dB;
A
p---the damping capacity of programmable attenuator, unit: dB;
A
c---the damping capacity of coaxial attenuator, unit: dB;
P
d---the power input Zhi， unit that waveform detection amplitude is corresponding: dBm;
S---antenna capture area, unit: cm
2.
The average power that enters the signal of described waveguide coaxial converter is not more than 30dBm(continuous wave) or peak power be not more than 50dBm(pulse width and be less than 10 μ s).
The damping capacity of described programmable attenuator, according to the stepping of 1dB, regulates continuously within the scope of 0～11dB.
Described wave detector input signal frequency range: DC～18GHz, waveform output amplitude is less than 150mV, and the response time is less than 2ns.
The bandwidth that described digital quantizer is selected: 500MHz, high sampling rate: 2GS/s, can complete the undistorted sampling to wave detector output waveform.
Described waveguide coaxial converter, programmable attenuator, coaxial attenuator, wave detector, digital quantizer, single-borad computer, fiber optical transceiver and temperature sensor are arranged in electromagnetic protection body, and electromagnetic protection body comprises housing and cap.Housing is the rectangular parallelepiped cavity of upper end open, bottom outside has a boss, boss end face size equals the end face of flange size of waveguide coaxial converter, on boss, open a rectangle through hole, coaxial interface one end of waveguide coaxial converter is inserted along rectangle through hole and is inserted housing from hull outside, until the end face of flange of waveguide coaxial converter overlaps with boss end face, flange and boss carry out 360 ° of welding along lap gap, welding adopts shielded welding or vacuum welding, the end face of flange of waveguide coaxial converter is opened four non-penetrating screw holes (coupling channel that enters electromagnetic protection body of having avoided traditional through hole to form), in order to be connected with the flange of waveguide attenuator with fastening.Cap and housing upper end open are coincide, and outer is welded with three layers of beryllium copper spring sheet, realizes the excellent electric contact of cap and housing, and the edge at housing upper end open place exceeds cap 1.5cm.
Not affecting under the prerequisite of system mask usefulness, on cap, open array of orifices, form Ventiliation window, coordinate the radiator fan that is arranged on Ventiliation window inner side to use, to improve the heat-sinking capability of system.
The power supply of the inner all electronic equipments of electromagnetic protection body is all provided by poly-lithium battery and voltage transformation module.
Waveguide coaxial converter can be flanged (FLGD) coaxial adatpter through walls, N-type or SMA type, and 360 ° of welding of seam of flange and housing, welding process avoids producing metal oxide.
Antenna can be selected pyramidal horn antenna or open ended waveguide.
According to the requirement of power capacity, can replace waveguide attenuator with directional coupler, or directional coupler serial connection waveguide attenuator makes together for completing the decay to high power microwave radiation field signal.
The invention has the beneficial effects as follows: adopted the digital quantizer of single-borad computer and pci interface to carry out the acquisition and processing of waveform, traditional oscillograph and computing machine have been replaced, make structure compacter, the repeating of the device of having avoided measuring position to change bringing connects, increased the reliability (because the repeatability of syndeton is not high, repeating to connect damping capacity meeting and the larger deviation of calibration result generation of rear system) of measurement result, in the decay link of measuring system, introduce program control adjustable attenuator (repeatability is less than 0.03dB), improved measurement dynamic range, made the dynamic range of measuring system can reach 20dB, strengthened the adaptability of measuring system in different capacity density field, the electromagnetic protection body of this measuring system reduces the existence of electric discontinuous link in design as far as possible, to the discontinuous link of unique electricity---the junction of housing and cap, adopted three layers of beryllium copper elastic piece structure to strengthen electromagnetic protection ability, adopting optical fiber (is a through hole of opening specially on housing for optical fiber through cut-off wave guide hole, size meets the electromagnetic cut-off condition of x wave band) connect this electromagnetic protection body, can realize reception and the transmission of data, do not affect again its shield effectiveness, these measures have guaranteed that this system is better than 90dB in the electromagnetic screen ability of X-band, by the use of temperature sensor and radiator fan, make system possess certain thermoregulator ability, outfield condition of work has been had to stronger adaptability, in addition this system bulk is little, and lightweight (being less than 10kg) is convenient to the rapid deployment of outfield surveying work.
Accompanying drawing explanation
Fig. 1 is X-band High-Power Microwave integrated radiation field measurement system principle structured flowchart;
Fig. 2 is waveguide coaxial converter structural drawing, wherein, (a) is front view, is (b) cut-open view;
Fig. 3 is shell structure figure, wherein, (a) is front view, is (b) cut-open view;
Fig. 4 is cap, Ventiliation window and beryllium copper spring chip architecture figure, wherein, (a) is front view, is (b) cut-open view;
Fig. 5 is X-band High-Power Microwave integrated radiation field measurement systematic protection section of structure;
In figure, 1-antenna, 2-waveguide attenuator, 3-waveguide coaxial converter, 4-programmable attenuator, 5-coaxial attenuator, 6-wave detector, 7-digital quantizer, 8-single-borad computer, 9-fiber optical transceiver, 10-supervisory control comuter, 11-controller, 12-voltage transformation module, 13-poly-lithium battery, 14-electromagnetic protection body, 15-housing, 16-cap, 17-beryllium copper spring sheet, 18-radiator fan, 19-Ventiliation window, 20-temperature sensor.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, high power microwave radiation field signal enters measuring system by antenna 1, through BJ100 type waveguide attenuator 2, waveguide coaxial converter 3(BJ100-SMA), programmable attenuator 4 and coaxial attenuator 5, by wave detector 6, detected the envelope waveform of pulse signal, this waveform is sent to as the single-borad computer 8 of process computer and is stored by pci interface after being gathered by digital quantizer 7, after measuring system is strictly calibrated, by the amplitude of waveform, can calculate the power density values of radiation field.Consider the power capacity of Waveguide coaxial conversion 3 and back-end system thereof, should control the average power that enters this device signal and be not more than 30dBm(continuous wave) or peak power be not more than 50dBm(pulse width and be less than 10 μ s).
The precondition of calculating the power density values of radiation field is under the frequency of high power microwave radiation field signal, and the corresponding relation of the damping capacity of the damping capacity of the insertion loss of the damping capacity of the useful area of the gain of antenna, antenna, waveguide attenuator, waveguide coaxial converter, programmable attenuator, coaxial attenuator, wave detector input power level and output waveform amplitude is carried out to strict demarcation.
Computing formula is:
The power density of high power microwave radiation Zhi， unit of W---antenna present position: mW/cm
2;
G---antenna gain, unit: dB;
A
w---the damping capacity of waveguide attenuator, unit: dB;
IL
w-c---the insertion loss of waveguide coaxial converter, unit: dB;
A
p---the damping capacity of programmable attenuator, unit: dB;
A
c---the damping capacity of coaxial attenuator, unit: dB;
P
d---the power input Zhi， unit that waveform detection amplitude is corresponding: dBm;
S---antenna capture area, unit: cm
2.
For fear of strong-electromagnetic field, tester is damaged, tester is at the long-range optical fiber (distance of this system Optical Fiber Transmission can reach 1.5km) that utilizes, the monitoring and controlling of realizing measuring system by supervisory control comuter 10 and fiber optical transceiver 9.Supervision comprises the demonstration that monitors waveform, the environment real time temperature that temperature sensor 20 gathers etc.; Control comprises the parameter setting of control figure converter 7, and the damping capacity of programmable attenuator 4 arranges etc.
Supervisory control comuter 10 is controlled controller 11 by single-borad computer 8 and is completed the long-range setting to programmable attenuator 4 damping capacitys, and the introducing of programmable attenuator 4 can make this measuring system realize larger measurement dynamic range.Programmable attenuator 4 damping capacitys can, according to the stepping of 1dB, regulate continuously within the scope of 0～11dB.Before use, need to utilize fine measuring instrument (as vector network analyzer) to demarcate each damping capacity, during use, only need to call calibration value, the reproducibility of controlling because of its damping capacity is less than 0.01dB, and the switching of the range of therefore decaying is less than 0.01dB to the impact of measuring accuracy.
In the circuit of controller 10, input TTL signal, exports 8 road voltage pulse signals, pulse height 24V, and pulse width 200ms, controls the damping capacity of programmable attenuator 4 according to the stepping of 1dB, within the scope of 0～11dB, realizes continuously and regulating.
Wave detector 6 input signal frequency ranges: DC～18GHz, waveform output amplitude is less than 150mV, and the response time is less than 2ns.
The bandwidth that digital quantizer 7 is selected: 500MHz, high sampling rate: 2GS/s, can complete the undistorted sampling to wave detector 6 output waveforms.
In order to realize this system, in strong-electromagnetic field, reliably and safely work, the weak link of 14 pairs of measuring system electromagnetic protections of electromagnetic protection body is protected, this housing is better than 90dB in the electromagnetic protection ability of X-band, meets the measurement requirement in the radiation field that field intensity is not more than 10kV/m.
Waveguide coaxial converter 3(end on structure), housing 15, cap 16 as shown in Figure 3, electromagnetic protection body 14 is mainly comprised of three parts:.Housing 15 main bodys are rectangular parallelepiped ghost, bottom outside centre bit is equipped with a boss, boss end face size equals the size of waveguide coaxial converter 3 end face of flange, on boss, open a rectangle through hole, connect the bottom of housing 15, the size of rectangle through hole is slightly larger than the size of waveguide coaxial converter 3 waveguide cavity outer walls, coaxial interface one end of waveguide coaxial converter 3 is inserted along the opening of boss and inserted housing 15 from the outside of housing 15, until the bottom surface of the flange of waveguide coaxial converter 3 is with the boss end face overlap joint of housing 15, in order to realize efficient electromagnetic screen, the boss of the flange of waveguide coaxial converter 3 and housing 15 is carried out to 360 ° of welding along the gap of overlap joint, welding adopts shielded welding or vacuum welding, avoided oxidation weld seam to affect shield effectiveness.The end face of waveguide coaxial converter 3 flange faces is opened four non-penetrating screw holes (coupling channel that enters electromagnetic protection body of having avoided traditional through hole to form), in order to the connection of the flange with waveguide attenuator 2 and fastening.As shown in Figure 4, on cap 16, weld three layers of beryllium copper spring sheet 17, neither affect freely opening and closure of cap 16, can realize again cap 16 and good the electrically contacting of housing 15, guaranteed the effect of shielding.The edge of housing 15 opening parts will exceed the about 1.5cm of cap 16, and the result of numerical simulation shows, this structure can reduce the electromagnetic leakage between housing 15 and cap 16 gaps.The result of actual measurement shows: at X-band, in the situation of emissive source front irradiation, the electromagnet shield effect of this structure is greater than 90dB.
Not affecting under the prerequisite of system mask usefulness, at cap, open array of orifices, form Ventiliation window 19, coordinate the use of radiator fan 18 to improve the heat-sinking capability of system.
The power supply of electromagnetic protection body 14 inner all electronic equipments is all provided by poly-lithium battery 13 and voltage transformation module 12.
The total power consumption of housing 15 internal components is about 50W, uses nominal voltage 11.1V, the poly-lithium battery power supply of electric weight 13Ah, and measuring system non-stop run duration can reach more than 3.5 hours.
Before use, need the frequency according to be measured, all devices of digital quantizer 6 front ends in this measuring system are demarcated, according to nominal data, can extrapolate the power density of measuring point place radiation field.
Waveguide coaxial converter 3 can be flanged (FLGD) coaxial adatpter through walls, N-type or SMA type, and 360 ° of welding of seam of flange face and housing 15, welding process avoids producing metal oxide.
Antenna 1 can be selected pyramidal horn antenna or the open ended waveguide of different gains.
According to the requirement of power capacity, can replace waveguide attenuator 2 with directional coupler, or directional coupler and waveguide attenuator are combined use.
Claims (2)
1. an X-band High-Power Microwave integrated radiation field measurement system, comprise antenna, waveguide attenuator, waveguide coaxial converter, programmable attenuator, coaxial attenuator, wave detector, digital quantizer, single-borad computer, fiber optical transceiver and supervisory control comuter, it is characterized in that: high power microwave radiation field signal by antenna reception after, through waveguide attenuator, carry out power attenuation, through waveguide coaxial converter, transfer to programmable attenuator, through programmable attenuator and coaxial attenuator, carry out power attenuation successively again, by wave detector, detected the envelope waveform of high power microwave radiation field signal, this envelope waveform sends to single-borad computer after being gathered by digital quantizer, calculate the power density of high power microwave radiation value of antenna present position, supervisory control comuter is the collection waveform to digital quantizer by fiber optical transceiver, the environment real time temperature of temperature sensor collection monitors, damping capacity to the parameter of digital quantizer and programmable attenuator is controlled.
2. X-band High-Power Microwave integrated radiation field measurement system according to claim 1, it is characterized in that: described waveguide coaxial converter, programmable attenuator, coaxial attenuator, wave detector, digital quantizer, single-borad computer, fiber optical transceiver and temperature sensor are arranged in electromagnetic protection body, electromagnetic protection body comprises housing and cap, housing is the rectangular parallelepiped cavity of upper end open, bottom outside has a boss, boss end face size equals the end face of flange size of waveguide coaxial converter, on boss, open a rectangle through hole, housing is inserted in coaxial interface one end of waveguide coaxial converter from hull outside along rectangle through hole, until the end face of flange of waveguide coaxial converter overlaps with boss end face, flange and boss carry out 360 ° of welding along lap gap, welding adopts shielded welding or vacuum welding, the end face of flange of waveguide coaxial converter is opened four non-penetrating screw holes, in order to be connected with the flange of waveguide attenuator with fastening, cap and housing upper end open are coincide, and outer is welded with three layers of beryllium copper spring sheet, realizes the excellent electric contact of cap and housing, and the edge at housing upper end open place exceeds cap 1.5cm.
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| CN201320209650.8U CN203422424U (en) | 2013-04-22 | 2013-04-22 | X waveband high power microwave integrated radiation field measurement system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103995187A (en) * | 2013-04-22 | 2014-08-20 | 中国人民解放军63655部队 | X-wave band high-power microwave integration radiation field measuring system |
| CN114062847A (en) * | 2021-11-15 | 2022-02-18 | 中国人民解放军63660部队 | X-waveband large-dynamic high-power microwave radiation environment distribution parameter measuring device |
| CN114264887A (en) * | 2021-11-25 | 2022-04-01 | 中国电子科技集团公司第五十八研究所 | Method for measuring microwave magnitude in vacuum cavity |
| CN114264889A (en) * | 2021-12-16 | 2022-04-01 | 中国工程物理研究院应用电子学研究所 | High-power millimeter wave power measurement and calibration device |
-
2013
- 2013-04-22 CN CN201320209650.8U patent/CN203422424U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103995187A (en) * | 2013-04-22 | 2014-08-20 | 中国人民解放军63655部队 | X-wave band high-power microwave integration radiation field measuring system |
| CN103995187B (en) * | 2013-04-22 | 2016-06-01 | 中国人民解放军63655部队 | X-band High-Power Microwave integrated radiation field measuring system |
| CN114062847A (en) * | 2021-11-15 | 2022-02-18 | 中国人民解放军63660部队 | X-waveband large-dynamic high-power microwave radiation environment distribution parameter measuring device |
| CN114264887A (en) * | 2021-11-25 | 2022-04-01 | 中国电子科技集团公司第五十八研究所 | Method for measuring microwave magnitude in vacuum cavity |
| CN114264889A (en) * | 2021-12-16 | 2022-04-01 | 中国工程物理研究院应用电子学研究所 | High-power millimeter wave power measurement and calibration device |
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Granted publication date: 20140205 Termination date: 20160422 |
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