CN109164405A - A kind of highpowerpulse Field strength calibration system and method - Google Patents
A kind of highpowerpulse Field strength calibration system and method Download PDFInfo
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Abstract
A kind of highpowerpulse Field strength calibration system and method are provided in the embodiment of the present application, wherein the system includes: the electromagnetic horn being arranged oppositely in microwave dark room and integrated optical electric field sensor and analysis module；The electromagnetic horn emits the pulsed field of fixed duty cycle in the microwave dark room, and the integrated optics electric-field sensor inductive impulse field strength generates induced voltage；Analysis module, parameter and the induced voltage based on pulse signal source obtain the calibration data of pulse field strength.Herein described technical solution can accurately carry out highpowerpulse Field strength calibration, can meet the Metrology Support demand of highpowerpulse field strength.Up to 3000V/m, the calibration range compared with existing conventional method (being no more than 1000V/m) has and is significantly promoted calibration range.This programme can also as needed calibrate the time domain parameters such as pulse field strength repetition rate, pulsewidth, rise/fall time.
Description
Technical field
This application involves pulse strengties to calibrate field, in particular to a kind of S-band (2GHz~4GHz) maximum amplitude
The highpowerpulse Field strength calibration system and method for 3000V/m.
Background technique
Field strength is one of physical quantity most basic in one of basic parameter of radio and complex electromagnetic environment.Field passes
Sensor is the commonly used equipment for measuring field strength, and the accuracy of field strength measurement result needs the guarantee of field strength sensor collimation technique.Mark
The grinding of quasi- field strength environment is built and the calibration of field sensor is always a developing direction of domestic and international metrological service.
The main standard of traditional field sensor calibration method foundation is International Electrical Electronic Engineering Association (IEEE) electricity
IEEE Std 1309-2013 " the IEEE Standard for calibration of that the compatible branch of magnetic promulgates
electromagnetic field sensors and probes,excluding antennas,from 9kHz
to40GHz".The standard describes nine kinds of field strength to different field strength types and scope and produces in the different frequency range of 9kHz~40GHz
Generation method (as shown in table 1) provides standard field strength environment for the calibration of field sensor.
Nine kinds of pattern field strong production methods described in table 1IEEE Std.1309-2013
In order to meet application demand, external main metrological service has put into substantial contribution and has established continuous wave Field strength calibration system
System.American National Standard technical research institute (NIST) divides different frequency range respectively in the cell TEM (10kHz~300MHz), open area test site
It is established in (25MHz~1GHz) and anechoic chamber, (utilizing open ended waveguide and standard-gain horn antenna) (0.2GHz~40GHz)
Continuous wave field-strength standard device, field strength range 1V/m~200V/m, uncertainty of measurement 0.2dB~1dB.Britain NPL is established
Continuous wave field-strength standard frequency range cover 10Hz~45.5GHz, in 10Hz~300MHz frequency range use TEM method, field strength range
For 0.05V/m~1000V/m, uncertainty of measurement 0.68dB；The room GTEM, field strength are used in 180MHz~2.5GHz frequency range
Range is 0.05V/m~600V/m, uncertainty 0.8dB；Pyramidal horn antenna, field strength are used in 2.4GHz~45.5GHz
Maximum can achieve 600V/m, and uncertainty is up to 0.4dB.Full Russia's physical technique and Radio Measurement research institute were in 1987
Frequency range 300Hz~1GHz is created within~1992 years, field strength measurement range is the continuous wave electric field strength of 0.2V/m~10V/m
National primary standard；The National primary standard of electromagnetic field energy-flux density in 0.3GHz~78.0GHz frequency range was created in 1999, was measured
Range is 0.1W/m2~10W/m2。
At home, Beijing Radio Measuring and Testing Institute is established in 10kHz~1GHz frequency range using the room TEM, the room GTEM
Range is 1V/m~300V/m, and uncertainty of measurement is continuous wave field-strength standard l.0dB；Using standard horn antenna micro-
1GHz~110GHz continuous wave field-strength standard is established in wave darkroom, field strength range is 1V/m~200V/m, and uncertainty of measurement is
1.2dB.It is 100V/m~120V/m that national measurement institute, which establishes range using the room TEM, the room GTEM in 10MHz~1GHz frequency range,
Uncertainty of measurement is the continuous wave field-strength standard of ldB；1GHz~40GHz is established in microwave dark room using standard horn antenna
Continuous wave field-strength standard, power flow secret range are 0.05mW/cm2~10mW/cm2, uncertainty of measurement 1dB.
Based on the calibration method of continuous wave field strength, recent domestic has also carried out the pulse field strength under small-power environment
Calibration research.2006, Split university Sarolic and the Roje pulse that feed-in duty ratio is 10% in rectangular waveguide were believed
Number, the field strength within 100V/m is measured using diode electric field probe, calculates and analyze the calibration factor of probe.2010
Year, David Adamson of Britain NPL etc. is analyzed continuous wave (CW) and each in small signal conditioning Imitating real radio frequency environment
Influence of the environment such as class modulated signal GSM, WDCMA, TETRA, DECT, Bluetooth to the modifying factor of electric field probe.
2014, Beijing Radio Measuring and Testing Institute also carried out the frequency response research of the electric field probe under pulse-modulated signal,
Influence of the factors such as pulsewidth, duty ratio to diode probe and thermocouple probe modifying factor in small-power environment is analyzed, is obtained
Phasic results, but high-power environment is not studied further.
Currently, highpowerpulse power amplifier peak power be typically all kilowatt even MW class, pulse signal via
The field strength generated after pulse amplifier has been more than that conventional electric field probe range (survey by conventional electric field probe usually in thousands of every meter of volts
Amount range is usually no more than 800V/m), in addition conventional electric field probe cannot react the time-domain information of pulsed field, can not be to high-power
Pulse field strength carries out measurement and calibration.
Summary of the invention
One of in order to solve the above problem, this application provides a kind of highpowerpulse Field strength calibration system and method, with solution
Certainly can not be with measurement and calibration is carried out to highpowerpulse field strength the problem of.
According to the first aspect of the embodiment of the present application, a kind of highpowerpulse Field strength calibration system, the system are provided
It include: the electromagnetic horn being arranged oppositely in microwave dark room and integrated optical electric field sensor and analysis module；
The electromagnetic horn emits the pulsed field of fixed duty cycle in the microwave dark room, and the integrated optics electric field passes
Sensor inductive impulse field strength generates induced voltage；
Analysis module, parameter and the induced voltage based on pulse signal source obtain the calibration data of pulse field strength.
According to the second aspect of the embodiment of the present application, a kind of highpowerpulse Field strength calibration method, this method are provided
The step of include:
Using the pulsed field with fixed duty cycle of integrated optics electric-field sensor inductive impulse signal source feed-in, generate
Induced voltage；
Parameter and the induced voltage based on pulse signal source obtain the calibration data of pulse field strength.
Herein described technical solution can accurately carry out highpowerpulse Field strength calibration, can meet highpowerpulse field
Strong Metrology Support demand.
The calibration range of this programme is up to 3000V/m, compared with the calibration range of existing conventional method (being no more than 1000V/m)
Have and is significantly promoted.
This programme can also time domain parameters such as the repetition rate to pulse field strength, pulsewidth, rise/fall time as needed
It is calibrated.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 shows the schematic diagram of a calibration system example using this programme；
Fig. 2 shows the schematic diagrames of another calibration system example using this programme；
Fig. 3 shows the schematic diagram of integrated optics electric-field sensor described in this programme；
Fig. 4 shows the schematic diagram of highpowerpulse Field strength calibration method described in this programme.
Specific embodiment
In order to which technical solution in the embodiment of the present application and advantage is more clearly understood, below in conjunction with attached drawing to the application
Exemplary embodiment be described in more detail, it is clear that described embodiment be only the application a part implement
Example, rather than the exhaustion of all embodiments.It should be noted that in the absence of conflict, embodiment and reality in the application
The feature applied in example can be combined with each other.
The core ideas of this programme is using integrated optics electric-field sensor as the inductive probe of pulsed field, according to pulse
The calibration data of the parameter of signal source and the calculation of lightning induced voltage pulse field strength of integrated optical electric field sensor, to meet maximum
The calibration requirements of the highpowerpulse field strength of amplitude 3000V/m.
Embodiment 1
This programme discloses a kind of highpowerpulse Field strength calibration system, and the maximum amplitude which can calibrate is reachable
3000V/m.The system includes: the electromagnetic horn being arranged in microwave dark room and integrated optical electric field sensor；Electromagnetic horn mouth
Face needs face integrated optics electric-field sensor.The electromagnetic horn emits the pulse of fixed duty cycle in the microwave dark room
, the integrated optics electric-field sensor inductive impulse field strength generates induced voltage.The system further includes analysis module, and described point
Analysis module is placed in outside microwave dark room, and parameter and the induced voltage based on pulse signal source obtain the calibration of pulse field strength
Data.
In the present embodiment, which can also include: pulse signal source, for generating the pulsed field of stock fixed duty cycle.
Pulse signal source can adjust the frequency and duty ratio of pulse according to calibration needs.The pulse signal source includes: signal
Device, power amplifier and directional coupler.Signal generator generates the pulse signal of a fixed duty cycle, which successively leads to
Overpower amplifier and directional coupler feed-in electromagnetic horn generate pulsed field.The pulse signal source further includes and the orientation
The power meter of coupler connection, the power meter are used to detect the forwards/reverse power of bidirectional oriented coupler, using positive/anti-
The net power of feed-in electromagnetic horn can be calculated to power.
In the present embodiment, as shown in figure 3, the integrated optics electric-field sensor includes: electric-field sensor, photodetection
Device, signal processing circuit and tunable laser.The pulsed field that the electric-field sensor senses turns through photodetector photoelectricity
It changes, is sent to signal processing circuit；The signal processing circuit handles photosignal, generates induced voltage signal.This
In embodiment, integrated optics electric-field sensor is to utilize LiNbO3Electrooptic effect of crystal under the action of external electric field realizes electricity
The measurement in magnetic field.
In the present embodiment, the analysis module includes: acquisition module and processing module.The acquisition module acquires the collection
At the induced voltage that optical electric field sensor generates, it is sent to processing module；Parameter of the processing module based on pulse signal source and
The induced voltage obtains the calibration data of pulse field strength.As shown in Figure 1, the processing module can be spectrum analyzer, benefit
The frequency spectrum data of pulsed field is obtained with spectrum analyzer.As shown in Fig. 2, the processing module can be oscillograph, oscillography is utilized
Device obtains the pulsewidth of pulsed field, repetition rate, duty ratio, rise/fall along time domain parameters such as times.
As shown in figure 4, further disclosing a kind of highpowerpulse Field strength calibration method, the step of this method in the present embodiment
It suddenly include: to be generated using the pulsed field with fixed duty cycle of integrated optics electric-field sensor inductive impulse signal source feed-in
Induced voltage；Parameter and the induced voltage based on pulse signal source obtain the calibration data of pulse field strength；Keep frequency is not
Become, adjust the duty ratio of pulsed field, obtain the pulse field strength calibration data under different duty, alternatively, adjustment frequency and duty
Than obtaining the pulse field strength calibration data under different frequency and duty ratio.
The step of parameter based on pulse signal source and induced voltage, the calibration data of acquisition pulse field strength, wraps
It includes: utilizing the forward direction peak power P of pulse signal sourcepeak-FWD, reversed peak power Ppeak-REVWith the duty ratio τ of pulsed field, meter
Calculate the net mean power P:P=(P of feed antennapeak-FWD-Ppeak-REV)·τ；
Utilize the distance between the net mean power and antenna of antenna and integrated optics electric-field sensor, the reason of antenna transmitting
By calibration pulse field E0:Wherein, G is electromagnetic horn gain；
Based on the induced voltage U, the pulse field intensity value E:E=AFU that integrated optics electric-field sensor receives is calculated,
Wherein, AF is the antenna factor of integrated optics electric-field sensor；
Based on the theoretical standard pulsed field E0With the pulse field intensity value E, correction factor is determined:
Power pulse field strength is widely used in the defence and militaries such as pulse radar, phased-array radar, telemetering field, is related to leading
The weapons model such as bullet, rocket, satellite, aircraft, naval vessel, is the important indicator of external radio frequency electromagnetic environment pilot system, is related to
The validity of test result.Highpowerpulse Field strength calibration can be accurately carried out by Chinese fir scheme, high-power arteries and veins can be met
Rush the Metrology Support demand of field strength.
Embodiment 2
Present embodiment discloses the highpowerpulse field strength schools of S-band (2GHz~4GHz) maximum amplitude 3000V/m a kind of
Quasi- method calibrates highpowerpulse field strength using integrated optics electric-field sensor (100MHz~18GHz).Wherein, collect
It is the electrooptic effect that LiNbO3 crystal is utilized under the action of external electric field at optical electric field sensor, realizes the survey of electromagnetic field
Amount.Since electric signal is modulated in optical path by this field sensor, extra chaff interferent interfered caused by it is small, and can be with
Field strength measurement for maximum every meter of volts up to ten thousand.As shown in figure 3, integrated optics electric-field sensor includes tunable laser, light
The parts such as fibre, electric-field sensor, photodetector, signal processing circuit；Tunable laser is passed by polarization maintaining optical fibre and electric field
Sensor connection, electric-field sensor are connect by single mode optical fiber with photodetector.
As shown in Figure 1, generating the pulse of a fixed duty cycle using signal generator SMF100A (1GHz~22GHz)
Signal, feed-in electromagnetic horn ATH800M6G (0.8~6GHz) generates pulsed field, feedback after which is amplified by power amplifier
The net power for entering electromagnetic horn can use the forward/reverse power calculation acquisition of power meter monitoring dual directional coupler.Away from
At r with a certain distance from electromagnetic horn, place integrated optics electric-field sensor (probe).Wherein, the distance of r can be according to equipment
Actual parameter is reasonably adjusted.In this example, r can use 0.8m.Integrated optics electric-field sensor connects as receiving transducer
The amplitude of field strength signal received accesses frequency spectrograph N9020A (10Hz~26.5GHz) after being transmitted through the fiber to signal processing host
It obtains.As shown in Fig. 2, the time-domain informations such as the rise/fall time of pulse field strength, duty ratio, repetition rate then can be by that will believe
The oscillograph of number processing host access high sampling rate obtains.
Specific calibration process is as follows:
A) instrument is connected according to mode shown in FIG. 1, instrument is preheated using preceding, makes signal generator and amplification
The frequency and amplitude of device reach stable, complete the self calibration of power meter；
B) electromagnetic horn is put into the field homogeneous area of calibrating installation, guarantees integrated optics electric-field sensor and loudspeaker day
Line mouth face face；
C) signal generator opens the pulsed field that output generates fixed duty cycle τ, records the forward direction peak value of directional coupler
Power Ppeak-FWDWith reversed peak power Ppeak-REV, the net mean power P of feed-in radiating antenna is calculated by formula (1):
P=(Ppeak-FWD-Ppeak-REV)·τ (1)
D) measure electromagnetic horn and integrated optical electric field sensor distance r, using formula (2) calculate electromagnetic horn away from
From the theoretical standard pulsed field E generated at r0, G is electromagnetic horn gain:
E) integrated optics electric-field sensor mouth face voltage U is read by frequency spectrograph；Integrated optics electricity is calculated using formula (3)
The pulse field intensity value E that field sensor receives.
E=AFU (3)
Wherein, AF is the antenna factor of integrated optics electric-field sensor.
F) correction factor A can be used to the calibration of pulse amplitude of field strengthFIt characterizes, as shown in formula (4):
G) Fig. 2 connection instrument is pressed, the frequency spectrograph in system is replaced with into high sampling rate oscillograph, obtains integrated optics electric field
Sensor receives the time domain parameter of pulsed field, including pulsewidth, repetition rate, duty ratio, rise/fall are along the time；
H) keep frequency is constant, changes pulsed field duty ratio, repeats c)~g), it obtains at the frequency under each duty cycle condition
Highpowerpulse Field strength calibration data；
I) adjustment signal generator repeats a)~h to next tested Frequency point), complete the school to highpowerpulse field strength
It is quasi-.
In the prior art about the room TEM method, the room GTEM method, pyramidal horn antenna method, open wave inducing defecation by enema and suppository, single cone method, bounded
Nine kinds of pattern field strong production method midfields such as wave simulation device method, Helmholtz coil method, plane-parallel capacitor method and waveguide room method
What sensor was all made of is the commonly used equipment for measuring field strength, and the accuracy of field strength measurement result needs field strength sensor collimation technique
Guarantee.Field sensor most widely used at present is emf probe, and emf probe is divided into diode detection probe and thermoelectricity
First two occasionally is visited, both probe ranges are usually no more than 1000V/m, are unable to measure the highpowerpulse field of thousands of every meter of volts
By force.In addition, two kinds of emf probes can not reflect the time-domain information of pulsed field, it is unable to satisfy the calibration requirements of pulsed field.This
Apply for that the technical solution can promote amplitude of field strength calibration range to 3000V/m, significantly improves rated capacity；Together
When, it being capable of the time domain parameters such as repetition rate, pulsewidth, rise/fall time to pulse field strength compared with existing calibration method
Carry out accurate alignment.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above is only the embodiment of the present invention, are not intended to restrict the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent substitution, improvement and etc. done, be all contained in apply pending scope of the presently claimed invention it
It is interior.
Claims (10)
1. a kind of highpowerpulse Field strength calibration system, which is characterized in that the system includes: to be arranged oppositely in microwave dark room
Electromagnetic horn and integrated optical electric field sensor and analysis module；
The electromagnetic horn emits the pulsed field of fixed duty cycle, the integrated optics electric-field sensor in the microwave dark room
Inductive impulse field strength generates induced voltage；
Analysis module, parameter and the induced voltage based on pulse signal source obtain the calibration data of pulse field strength.
2. highpowerpulse Field strength calibration system according to claim 1, which is characterized in that the system further include: pulse
Signal source, for generating the pulse signal of fixed duty cycle.
3. highpowerpulse Field strength calibration system according to claim 2, which is characterized in that the pulse signal source packet
It includes: signal generator, power amplifier and directional coupler；The pulse signal that the signal generator generates passes sequentially through power
Amplifier and directional coupler are transmitted to electromagnetic horn.
4. highpowerpulse Field strength calibration system according to claim 3, which is characterized in that the pulse signal source also wraps
It includes: the power meter being connect with the directional coupler.
5. highpowerpulse Field strength calibration system according to claim 1, which is characterized in that the integrated optics electric field passes
Sensor includes: electric-field sensor, photodetector and signal processing circuit；The pulsed field that the electric-field sensor senses is through light
Electric explorer photoelectric conversion, is sent to signal processing circuit；The signal processing circuit handles photosignal, generates sense
Answer voltage signal.
6. highpowerpulse Field strength calibration system according to claim 1, which is characterized in that the optical electric field sensor
Further include: tunable laser, based on the wavelength control signal that signal processing circuit issues, to electric-field sensor transmitting laser letter
Number.
7. highpowerpulse Field strength calibration system according to claim 1, which is characterized in that the analysis module includes:
Acquisition module, the induced voltage generated for acquiring the integrated optics electric-field sensor；
Processing module, parameter and the induced voltage based on pulse signal source obtain the calibration data of pulse field strength.
8. a kind of highpowerpulse Field strength calibration method, which is characterized in that the step of this method includes:
Using the pulsed field with fixed duty cycle of integrated optics electric-field sensor inductive impulse signal source feed-in, induction is generated
Voltage；
Parameter and the induced voltage based on pulse signal source obtain the calibration data of pulse field strength.
9. analysis method according to claim 8, which is characterized in that the parameter and the sense based on pulse signal source
The step of answering voltage, obtaining the calibration data of pulse field strength include:
Utilize the forward direction peak power P of pulse signal sourcepeak-FWD, reversed peak power Ppeak-REVWith the duty ratio τ of pulsed field, meter
Calculate the net mean power P:P=(P of feed antennapeak-FWD-Ppeak-REV)·τ；
Using the distance between the net mean power and antenna of antenna and integrated optics electric-field sensor, the theoretical mark of antenna transmitting
Quasi- pulsed field E0:Wherein, G is electromagnetic horn gain；
Based on the induced voltage U, the pulse field intensity value E:E=AFU that integrated optics electric-field sensor receives is calculated,
In, AF is the antenna factor of integrated optics electric-field sensor；
Based on the theoretical standard pulsed field E0With the pulse field intensity value E, correction factor is determined:
10. analysis method according to claim 8, which is characterized in that the step of described this method further include:
Keep frequency is constant, adjusts the duty ratio of pulsed field, obtains the pulse field strength calibration data under different duty；Or
Frequency and duty ratio are adjusted, the pulse field strength calibration data under different frequency and duty ratio is obtained.
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| CN111965436A (en) * | 2020-08-27 | 2020-11-20 | 电子科技大学 | System and method for calibrating electric field intensity in irregular resonant cavity |
| CN112558001A (en) * | 2020-12-18 | 2021-03-26 | 北京无线电计量测试研究所 | Pulse high-power field calibration device and method |
| CN113567903A (en) * | 2021-07-21 | 2021-10-29 | 清华大学 | Method, device, computer storage medium and terminal for realizing sensor calibration |
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| CN114460515A (en) * | 2021-12-29 | 2022-05-10 | 宜昌测试技术研究所 | Method for calibrating pulsed magnetic field measuring tool based on uniform pulsed magnetic field |
| CN118897128A (en) * | 2024-09-29 | 2024-11-05 | 贵州航天计量测试技术研究所 | A high-power microwave pulse field strength standard device and its traceability method |
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