CN106872831B - Interference source determines method in highly sensitive antenna of receiving device band in microwave load satellite - Google Patents
Interference source determines method in highly sensitive antenna of receiving device band in microwave load satellite Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
Disclosed herein is interference sources in highly sensitive antenna of receiving device band in microwave load satellite to determine method, firstly, entire microwave load satellite is placed in standard shielded dark room conditions；Then, it is determined that being the potential interference pair of recipient with highly sensitive antenna of receiving device；Then, the interference source that interference margins are greater than the potential electromagnetic interference pair of pre-determined threshold is determined as potential interference source by the interference margins for calculating each potential electromagnetic interference pair；Later, first highly sensitive receiving device is powered on, potential interference source is successively loaded according still further to the sequence of interference margins from small to large, after having loaded potential interference source when highly sensitive receiving device working state abnormal, determines that the potential interference source is interference source in highly sensitive antenna of receiving device band.The test method, which realizes, directly orients interference source, interference operating condition and interference strength, demonstrates electromagnetic interference problem in satellite system, achievees the purpose that directly to improve system EMC test efficiency.
Description
Technical field
The present invention relates to one of a kind of whole star EMC test pilot project and method, especially microwave load to defend
Interference source determines method in highly sensitive antenna of receiving device band in star, belongs to technical field of electromagnetic compatibility.
Background technique
Modern marine dynamic environment satellite and high resolution SAR load satellite are microwave remote sensing satellite, such satellite master
Wanting task is to obtain earth surface feature, including Ocean Wind-field, wave, ocean current, sea surface temperature, storm at sea using microwave load
With tide etc., Ocean monitoring, disaster monitoring and assessment, land mapping and urban development planning, agricultural, forestry, geology,
Hydrology etc. extensive application prospect usually loads many more highly sensitive to obtain high-precision remotely-sensed data on star
Microwave loading device, in addition to needing emphasis to consider the guarantor to these highly sensitive loading devices in design of satellites development process
Shield, it is also necessary to reasonable effective pilot project is designed for the system-level EMC test in satellite assembly electrical measurement stage, to test
Demonstrate,prove in satellite system from compatible context, point be since satellite system development progress is compact, system EMC test is related to
Equipment of uniting is numerous, design it is a kind of can the quickly position in location interference source and the test method of operating condition, improve test efficiency and examination
Effect is tested, whole star development progress can be effectively ensured, improves system reliability.
In actual conditions, the general assembly stage is developed in satellite, it will usually arrange whole star EMC test to carry out verifying satellites each
Electro Magnetic Compatibility and safe clearance between subsystem.And in traditional whole star EMC test, often by the electrical measurement journey of satellite
Sequence is arranged to the in-orbit mould of satellite and flies working condition, whether then monitoring the normal work of each subsystem and equipment, to verify and be
System Internal electromagnetic compatibility.In this case, once finding disturbed phenomenon, research institute needs to expend a large amount of human and material resources
Carry out the work of tissue malfunction elimination, and relationship is complicated between subsystem on star, interknits, and more extends the electrical measurement time of satellite system
Interference source is found, will inevitably impact on whole star development progress.Especially for there is multiple highly sensitive received microwaves on star
Load satellite, and the radio-frequency apparatus high sensitivity and Numerous loaded on microwave remote sensing satellite are easily sent out between different subsystems
Raw electromagnetic interference, the more difficulty of intensification interference source positioning, if efficiency is lower without target is checked with having a definite purpose.
Summary of the invention
Technology of the invention solves the problems, such as: overcome the deficiencies in the prior art, proposes a kind of microwave load satellite Nei Gaoling
Interference source determines method in quick antenna of receiving device band, quick and precisely orients position, interference operating condition and the interference of interference source
Degree achievees the purpose that directly to improve system EMC test efficiency to solve electromagnetic interference problem in satellite system.
The technical solution of the invention is as follows: interference source determines in highly sensitive antenna of receiving device band in microwave load satellite
Method, the highly sensitive receiving device are receiving sensitivity for the receiving device better than -100dBm, and this method includes following step
It is rapid:
(1), entire microwave load satellite is placed in standard shielded dark room conditions, by standard shielded darkroom floor and microwave
It is paved with absorbing material on load satellite bracket, avoids interference signal after object reflection in microwave load satellite health ambient enviroment
Into sensitive receiver device antenna；
(2), the potential interference pair in microwave load satellite with highly sensitive antenna of receiving device for recipient is determined；
(3), the interference margins for calculating each potential electromagnetic interference pair determined by step (2), interference margins are greater than
The interference source of the potential electromagnetic interference pair of pre-determined threshold is determined as potential interference source, enters step (4)；
(4), according to realistic application conditions on microwave load Satellite, highly sensitive receiving device and its corresponding day are connected
Line, and be powered on, it is allowed in running order；
(5), potential interference source is successively loaded according to the sequence of interference margins from small to large, and monitors load potential interference source
The working condition of highly sensitive receiving device later；When highly sensitive receiving device working state abnormal, it is believed that newest power-up
Potential interference source interferes highly sensitive receiving device, records the interference source and interference phenomenon, closes the interference source later again
New potential interference source is loaded, otherwise, then without closing the interference source, new potential interference source is loaded directly into, until step (3)
In identified all potential interference sources loaded, determine interference source in highly sensitive antenna of receiving device band.
The step (4) is also disposed adjacent to highly sensitive receiving device day using the antenna of identical gain, identical direction simultaneously
The position of line, the antenna are connected to the rf inputs of electromagnetic interference monitoring device, for highly sensitive antenna of receiving device
It is monitored with interior frequency spectrum；The step (5) monitors the highly sensitive receiving device that electromagnetic interference monitoring device is tested simultaneously
Frequency spectrum in aerial band observes noise level, and recording noise level is more than the magnitude of the receiving sensitivity of highly sensitive receiving device, together
When obtain in highly sensitive antenna of receiving device band interference source to the interference strength of highly sensitive receiving device.
The step (4) is placed in the position of highly sensitive antenna of receiving device using the antenna of identical gain, identical direction, replaces
Highly sensitive receiving device is changed, the antenna is connected to the rf inputs of electromagnetic interference monitoring device, makes an uproar to frequency spectrum in aerial band
Vocal level is monitored；
The step (5) loads potential interference source according to the sequence of interference margins from small to large, and monitors electromagnetic interference prison
Frequency spectrum in the highly sensitive antenna of receiving device band that measurement equipment is tested observes noise level, when noise level is more than highly sensitive
When receiving device sensitivity, it is believed that the potential interference source being powered on recently interferes highly sensitive receiving device, records the interference
The interference source is closed in source later, loads new potential interference source, otherwise, then without closing the interference source, is loaded directly into new dive
In interference source, until identified all interference sources have loaded in step (3), determines in highly sensitive antenna of receiving device band and do
Disturb source.
The standard shielded darkroom is directed to the signal of 1~18GHz of frequency range, and shield effectiveness should at least reach: 80dB,
Simultaneously for the signal of 1~1000MHz of frequency range, shield effectiveness should at least reach: 90dB.
The potential interference to two equipment of transmitting-receiving to constitute interference, highly sensitive receiving device as receiving device, when
Transmitting signal fundamental wave, harmonic wave, subharmonic, the clutter of transmitting equipment are fallen into the main passband and mirror image passband of highly sensitive receiving device
When, then the transmitting equipment and highly sensitive receiving device constitute potential interference pair.
The potential electromagnetic interference is interfered comprising two types between two equipment, coupled interference and shell respectively between antenna
Body leakage interference, step (3) calculate separately the interference margins that potential interference interferes two types, take the two maximum value as electricity
The interference margins of magnetic disturbance pair.
The interference margins IM that coupling type interferes between the antenna is calculated using following equation:
IM=P (fE)-LCE1-Lt-Ltr-Lr-PR(fR)
In formula,
P(fE) it is the center frequency point f that transmitting equipment emits signalECorresponding power；
LCE1Emit power of the signal at receiving device center frequency point relative to transmitting signal center's frequency point for transmitting equipment
Locate the attenuation of power, unit dB.
LtFor transmitting equipment and transmitting antenna between at receiving device center frequency point corresponding feeder loss, unit dB；
LtrIsolation between receiving and transmitting, unit dB；
LrBetween receiving device and antenna of receiving device at receiving device center frequency point corresponding feeder loss unit
dB；
PR(fR) be in response frequency be fRWhen, receiving device susceptibility threshold, unit dBm, fRFor the center of receiving device
Frequency.
The interference margins IM of the shell leak type interference is calculated using following equation:
IM=E1-20log(R)+20log(λ)+20log(GR)-127-Ispace-PR(fR)
In formula, E1Unintended radiation for the transmitting equipment of potential interference centering emits field strength, unit dBuV/m；
R be between receiving device sensitive reception antenna of the transmitting equipment apart from potential interference centering of potential interference centering away from
From unit m；
λ is that the receiving device of potential interference centering receives the corresponding signal wavelength of working frequency, unit m；
GRFor the gain of the receiving device receiving antenna of potential interference centering, unit dB；
IspaceThe degree of screening caused by satellite structure between jamming equipment and antenna, unit dB；
PR(fR) be in response frequency be fRWhen receiving device susceptibility threshold, unit dBm；
fRFor the centre frequency of receiving device.
The microwave absorbing property of the absorbing material is not less than 30dB.
The preset thresholding is -3dB~0dB.
Compared with the prior art, the invention has the advantages that:
(1), the present invention is by satellite RF EMC analysis, confirming potential interference pair in system in advance, then from
The calculated result of the electromagnetic interference surplus of potential interference pair is realized to the pre- of interference operating condition, annoyance level and potential interference path
It surveys, can be conducive to formulate electromagnetic compatibility in time in the first time quick locating interfering devices and operating condition confirmation that failure occurs
Measures to rectify and reform；
(2), the present invention uses ground-plane antenna and the highly sensitive antenna of receiving device band of electromagnetic interference monitoring device Simultaneous Monitoring
Interior frequency spectrum quickly determines annoyance level by observing the variation of the noise in sensitive reception band in real time as supplementary means；
(3), the present invention directly replaces highly sensitive receiving device, Ke Yiti using ground-plane antenna and electromagnetic interference monitoring device
The influence that the preceding whole other equipment of star of prediction generate it；The EMC of other equipment can be effectively instructed to design and control work in this way
Make, avoids missing the opportunity of design modification.
(4), selection criteria shielded anechoic chamber of the present invention is tested, and carries out place transformation, the field around satellite to darkroom
High-performance wave-absorbing material is completely spread on the bracket of ground and satellite, to reduce multi-path jamming bring test error to test macro
It influences, improves test accuracy.
(5), the present invention using ground-plane antenna and electromagnetic interference monitoring device to the disturbed state of highly sensitive receiving device into
Row monitoring avoids remotely-sensed data interpretation delay from bringing investigation not in time.
Detailed description of the invention
Fig. 1 is that interference source determines method flow diagram in highly sensitive antenna of receiving device band in microwave load satellite of the present invention；
Fig. 2 is the highly sensitive receiving antenna in-band noise test arrangement schematic diagram of the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments:
It include multiple satellite borne equipments inside microwave load, including measuring and controlling equipment, data transmission equipment and highly sensitive navigation receive
Machine etc., some have emission function, and some has receive capabilities.Wherein, highly sensitive receiving device is especially sensitive, is highly prone to send out
The interference of jet device, especially receiving sensitivity are receiving device (such as the highly sensitive navigation neceiver better than -100dBm
Sensitivity index reaches -130dBm).Therefore it needs that the antenna in-band noise of these equipment is analyzed and tested and determines its band
Interior interference source, to preferably protect these equipment not by external interference.
As shown in Figure 1, the present invention provides interference sources in highly sensitive antenna of receiving device band in a kind of microwave load satellite
Determine method, this method comprises the following steps:
(1), entire microwave load satellite is placed in standard shielded dark room conditions, by standard shielded darkroom and microwave load
It is paved with absorbing material on satellite bracket, interference signal is avoided to enter after object reflection in microwave load satellite health ambient enviroment
Sensitive receiver device antenna；The standard shielded darkroom is directed to the signal of 1~18GHz of frequency range, and shield effectiveness is at least answered
Reach: 80dB；Simultaneously for the signal of 1~1000MHz of frequency range, shield effectiveness should at least reach: 90dB.
It is at least full on the ground within the scope of satellite 4m if standard shielded darkroom is half wave shield darkroom
Absorbing material is spread, absorbing material is completely spread on the bracket of satellite, the microwave absorbing property of the absorbing material is not less than 30dB；
(2), the potential interference pair in microwave load satellite with highly sensitive antenna of receiving device for recipient is determined；It is described latent
In interference to two equipment of transmitting-receiving to constitute interference, highly sensitive receiving device is as receiving device, when the transmitting of transmitting equipment
When signal fundamental wave, harmonic wave, subharmonic, clutter are fallen into the main passband and mirror image passband of highly sensitive receiving device, then the transmitting is set
It is standby to constitute potential interference pair with highly sensitive receiving device.
(3), the interference margins for calculating each potential electromagnetic interference pair determined by step (2), interference margins are greater than
The interference source of the potential electromagnetic interference pair of pre-determined threshold is determined as potential interference source, some possible equipment of the interference source, it is also possible to
It is one of operating mode of some equipment, the list of potential interference source can be included in, positions conduct for later period interference source
Foundation enters step (4)；
The pre-determined threshold value range 0dB, it is contemplated that calculate the test data used of interference margins there are test error,
And the purpose of Space Vehicle System EMC test is sufficiently to expose potential problem, in order to sufficiently expose problem, in practical application
In, relatively low threshold value is usually taken, such as -3dB.
The potential electromagnetic interference is interfered comprising two types between two equipment, coupled interference and shell respectively between antenna
Body leakage interference.Wherein:
(3.1), the interference margins IM that coupling type interferes between antenna is calculated using following equation:
IM=P (fE)-LCE1-Lt-Ltr-Lr-PR(fR)
In formula:
P(fE) it is the center frequency point f that transmitting equipment emits signalECorresponding power；Belong to stand-alone device design objective it
One, it can use test value or design value.
LCE1Emit power of the signal at receiving device center frequency point relative to transmitting signal center's frequency point for transmitting equipment
Locate the attenuation of power, unit: dB.It can be using the survey for whether meeting CE106 requirement in national military standard GJB151A about transmitter
Method for testing is tested to obtain.The CE106 refers to that " military equipment and subsystem Electromagnetic Launching and susceptibility are wanted in standard GJB151A
Ask " under " prevention at radio-frequency port conducted emission " test item, it provide transmitter prevention at radio-frequency port with outer clutter recognition situation, can
To obtain pad value of the emission spectra with respect to primary spectrum.
LtFor transmitting equipment and transmitting antenna between at receiving device center frequency point corresponding feeder loss, unit: dB；
Belong to one of the design objective of stand-alone device, can use test value or design value.
LtrIsolation between receiving and transmitting, unit dB can test to obtain, because surveying using vector network analyzer
Examination hall reflections affect should fully consider its test error correct, interference margins analyze when should use degree of coupling worst case,
There is no that simulation result can also be used in the case where measured result.
LrBetween receiving device and antenna of receiving device at receiving device center frequency point corresponding feeder loss unit:
DB belongs to one of design objective of stand-alone device, can use test value or design value.
PR(fR) be in response frequency be fRWhen, receiving device susceptibility threshold, unit: dBm is obtained by test；
fRFor the centre frequency of receiving device.
(3.2), the interference margins IM of shell leak type interference is calculated using following equation:
IM=E1-20log(R)+20log(λ)+20log(GR)-127-Ispace-PR(fR)
In formula:
E1Unintended radiation for the transmitting equipment of potential interference centering emits field strength, unit: dBuV/m；Army, state can be used
The test method for whether meeting RE102 requirement about transmitter in mark GJB151A obtains.The RE102 refers in standard
" electric field radiation transmitting " test item under GJB151A " military equipment and subsystem Electromagnetic Launching and susceptibility requirement ", it is mentioned
For the radiation-emitting of apparatus casing and interconnecting cable, can be received the valuation of antenna front ends electric field strength, it is available away from
From the space electrical field at 1 meter of equipment.
R be between receiving device sensitive reception antenna of the transmitting equipment apart from potential interference centering of potential interference centering away from
From unit: m.
λ is that the receiving device of potential interference centering receives signal wavelength, and unit m is received using the light velocity divided by receiving device
The working frequency of signal is calculated.
GRFor the gain of the receiving device receiving antenna of potential interference centering, unit dB, the design for belonging to stand-alone device refers to
One of mark can use test value or design value.
IspaceThe degree of screening caused by satellite structure between jamming equipment and antenna, unit dB belong to setting for stand-alone device
One of index is counted, can use test value or design value.
PR(fR) be in response frequency be fRWhen receiving device susceptibility threshold, unit dBm passes through single machine performance test
It obtains.
fRFor the centre frequency of receiving device.
The interference margins of potential electromagnetic interference pair take the maximum value of the interference margins of above two types of interference.
(4), according to realistic application conditions on microwave load Satellite, highly sensitive receiving device and its corresponding day are connected
Line, and be powered on, it is allowed in running order；Detected high sensitive reception equipment mounting arrangement, antenna arrangement, line on star
Cable type selecting, cable trend etc. should be consistent with actual state on star.
(5), potential interference source is successively loaded according to the sequence of interference margins from small to large, and is joined by the telemetering of satellite
Number, remotely-sensed data and ground monitoring equipment, monitoring load the working condition of highly sensitive receiving device after potential interference source；Work as height
When sensitive receiver equipment working state is abnormal, such as there is abnormal telemetering state, remotely-sensed data exception or ground monitoring equipment
When abnormal parameters, it is believed that the potential interference source of newest power-up interferes highly sensitive receiving device, records the interference source, that is, remembers
Detailed jamming pattern and scalar value are recorded, the interference source is closed later and reloads new potential interference source, otherwise, then without closing
The interference source is loaded directly into new potential interference source, until identified all potential interference sources have loaded in step (3),
Determine interference source in highly sensitive antenna of receiving device band.
In order to further obtain to interference source in highly sensitive antenna of receiving device band to the interference journey of highly sensitive receiving device
Degree, the step (4) are also disposed adjacent to the position of highly sensitive antenna of receiving device using the antenna of identical gain, identical direction simultaneously
It sets, the antenna is connected to the rf inputs of electromagnetic interference monitoring device (such as spectrum analyzer), for highly sensitive reception
Frequency spectrum is monitored in device antenna band；The step (6) monitor simultaneously electromagnetic interference monitoring device test it is highly sensitive
Frequency spectrum in antenna of receiving device band, observes noise level, and recording noise level is more than the receiving sensitivity of highly sensitive receiving device
Magnitude, while obtaining to interference source in highly sensitive antenna of receiving device band to the annoyance level of highly sensitive receiving device.It will be electric
The center frequency point of magnetic disturbance monitoring device is set as the center frequency point that the highly sensitive equipment receives band, electromagnetic interference monitoring device
Reception bandwidth is set as 1.5 times of the sensitive equipment reception bandwidth, and this ground-plane antenna adds surface em interference (EMI) monitoring to set
The method of standby test noise frequency spectrum can be used as auxiliary supplement.
When in step (2) highly sensitive receiving device and antenna can not participate in system test because of cause specific when, can be with
Using following methods look-ahead and orient the operating condition and the possible disturbed degree of highly sensitive receiving device of potential interference equipment,
Be conducive to determine that measures to rectify and reform are eliminated or improve interference phenomenon rapidly:
The step (4) is disposed adjacent to the position of highly sensitive antenna of receiving device using the antenna of identical gain, identical direction
It sets, replaces highly sensitive receiving device, the antenna is connected to the rf inputs of electromagnetic interference monitoring device, to frequency in aerial band
Spectrum is monitored；
Step (5) loads potential interference source according to the sequence of interference margins from small to large, and monitors electromagnetic interference monitoring and set
Frequency spectrum in the highly sensitive antenna of receiving device band that standby test obtains, observes noise level, when noise level is more than highly sensitive reception
When device sensitivity, it is believed that the potential interference source being powered on recently interferes highly sensitive receiving device, record the interference source and
Interference phenomenon, that is, record detailed jamming pattern and scalar value, closes the interference source later, loads new potential interference source, no
Then, then it is loaded directly into new potential interference source, until identified all interference sources in step (3) without closing the interference source
It has loaded, has determined interference source in highly sensitive antenna of receiving device band.Equally, the center frequency point setting of electromagnetic interference monitoring device
The center frequency point of band is received for the highly sensitive equipment, the reception bandwidth of electromagnetic interference monitoring device is set as sensitive equipment reception
1.5 times of bandwidth.
Fig. 2 gives highly sensitive antenna of receiving device in-band noise test arrangement schematic diagram.The figure as one embodiment,
Assuming that measuring and controlling equipment constitutes a pair of of potential interference pair, data transmission equipment as first potential interference source and highly sensitive receiving device
Another pair potential interference pair is constituted as second potential interference source and highly sensitive receiving device.When test, first according to satellite
Practical application connects highly sensitive receiving device and its antenna, loads highly sensitive receiving device and is disposed at sensitive receiver work
State loads potential interference source 1, the various operating modes and operating condition of interference source 1 is respectively set, observe sensitive payload reception equipment
Whether working condition is normal, is received at the same time using the ground-plane antenna of EMC (containing cable), low-noise amplifier and electromagnetic interference
Equipment records sensitive payload reception antenna simultaneously and receives the noise spectrum level in, can also confirm when such as having more than sensitivity limit
Interference phenomenon exists, and also needs to record detailed jamming pattern and scalar value.When system testing does not have highly sensitive receiving device and day
When line, EMC ground-plane antenna is placed near highly sensitive antenna of receiving device.
After all suspicious interference source loadeds, to interference source positioning, interference channel in highly sensitive antenna of receiving device band
And verification experimental verification has finished annoyance level, totally can determine rectification scheme according to verification result come quick.
The present invention is according to the electromagnetic compatibility test result of other equipment, antenna on the satellite being collected into satellite development process
Layout and isolation between antennas test result and complete the compatible analysis of system-level radio-frequency electromagnetic, and provide according to RE102 and CE106
Measured result carries out interference margins analytical calculation formula, is included in the list of potential interference source when interference margins are greater than 0, advantageous in this way
Corresponding operating condition when obtaining noise testing in aerial band, in this way interference when occurring can at the first time quickly locating interfering devices and
Operating condition confirmation, is conducive to formulate electromagnetic compatibility measures to rectify and reform in time.
It is connect The present invention gives highly sensitive in the case of participating in two kinds of system testing with and without actual highly sensitive receiving device
The sensitive loaded antennas in-band noise test method selection of receiving unit, antenna laying method and its setting of electromagnetic interference monitoring device,
Especially in the case where participating in testing without highly sensitive receiving device, implements monitoring sensitivity by ground-plane antenna and receiving device and connect
Receive antenna in-band noise variation, can with the other equipment of the whole star of look-ahead may to it generate influence, in this way can be effective
Ground instructs the EMC of other equipment to design and control work, avoids missing the opportunity of device level EMC Design modification.
Embodiment:
3 subharmonic of the TT&C Transponder tranmitting frequency 2.228GHz of certain microwave remote sensing satellite fall into certain highly sensitive reception
In the 350MHz frequency band of the 6.6G receiving channel of equipment (microwave radiometer).
1) if interference channel is directly radiated by transmitting antenna is coupled to receiving antenna, the transmitting path of TT&C Transponder
Transmission power 26dBm, path attenuation 3dB, 3 subharmonic of answering machine emission port CE106 host test result is suppressed to 43dB, standby
3 subharmonic of test result of machine inhibits to be better than 58dB, and the sensitivity of payload reception machine is better than -118dBm, between two subsystem antennas
Isolation is 87dB by RM star test result, and in this way by above formula, interference margins are expected to be 11dB (host) after calculating
There is interference, -4dB (standby host) is noiseless.
2) if interference channel is coupled to receiving antenna by TT&C Transponder shell leakage rediation, according to single machine RE102
Test result knows that the radiation-emitting that triple-frequency harmonics 6.685GHz interference is leaked from circuit is 47.5dBuV/m TT&C Transponder distance
6.6G receiving antenna is greater than 2 meters, can reach 40dB or more according to the degree of screening of previous this frequency range celestial body of test experience, pass through in this way
Above formula, interference margins expect that -34.5dB is noiseless after calculating.
It is overall to be analyzed in advance according to interference margins of this method to system potential interference pair, in positive sample electromagnetic compatibility system
Unified test tries that this item test is just scheduled when curriculum first, just verifies in the first initial time of system electromagnetic compatibility test
Interference problem between answering machine (host) and microwave radiometer, and confirmed that interference channel couples between antenna, root
Low-pass filter (its quickly is increased in the main transmission channel of answering machine according to the disturbed degree (disturbed degree about 20dB) of receiver
Filtering characteristic is greater than 28dB at 6.685GHz frequency) make system safe clearance be greater than 6dB.As it can be seen that being proposed using the present invention
Method, be capable of quickly location interference source position and operating condition be effectively ensured to improve test efficiency and clear measures to rectify and reform
Whole star development progress improves system reliability.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (10)
1. interference source determines method in highly sensitive antenna of receiving device band in microwave load satellite, the highly sensitive receiving device is
Receiving sensitivity is the receiving device better than -100dBm, it is characterised in that is included the following steps:
(1), entire microwave load satellite is placed in standard shielded dark room conditions, by standard shielded darkroom floor and microwave load
It is paved with absorbing material on satellite bracket, interference signal is avoided to enter after object reflection in microwave load satellite health ambient enviroment
Sensitive receiver device antenna；
(2), the potential interference pair in microwave load satellite with highly sensitive antenna of receiving device for recipient is determined；
(3), interference margins are greater than default by the interference margins for calculating each potential electromagnetic interference pair determined by step (2)
The interference source of the potential electromagnetic interference pair of thresholding is determined as potential interference source, enters step (4)；
(4), according to realistic application conditions on microwave load Satellite, highly sensitive receiving device and its corresponding antenna are connected, and
It is powered on, is allowed in running order；
(5), successively load potential interference source according to the sequence of interference margins from small to large, and monitor load potential interference source after
The working condition of highly sensitive receiving device；When highly sensitive receiving device working state abnormal, it is believed that newest power-up it is potential
Interference source interferes highly sensitive receiving device, records the interference source and interference phenomenon, closes the interference source later and reloads
Otherwise new potential interference source then without closing the interference source, is loaded directly into new potential interference source, until institute in step (3)
Determining all potential interference sources have loaded, and determine interference source in highly sensitive antenna of receiving device band.
2. interference source determines method in highly sensitive antenna of receiving device band in microwave load satellite according to claim 1,
It is characterized by: the step (4) is also disposed adjacent to highly sensitive receiving device using the antenna of identical gain, identical direction simultaneously
The position of antenna, the identical gain, identical direction antenna be connected to the rf inputs of electromagnetic interference monitoring device, be used for
Frequency spectrum in highly sensitive antenna of receiving device band is monitored；The step (5) monitors the test of electromagnetic interference monitoring device simultaneously
Frequency spectrum in obtained highly sensitive antenna of receiving device band, observes noise level, and recording noise level is more than highly sensitive receiving device
Receiving sensitivity magnitude, while obtaining interference of the interference source to highly sensitive receiving device in highly sensitive antenna of receiving device band
Intensity.
3. interference source determines method in highly sensitive antenna of receiving device band in microwave load satellite according to claim 1,
It is characterized by:
The step (4) is placed in the position of highly sensitive antenna of receiving device using the antenna of identical gain, identical direction, and replacement is high
Sensitive receiver equipment, the identical gain, identical direction antenna be connected to the rf inputs of electromagnetic interference monitoring device, it is right
Spectral noise levels are monitored in aerial band；
The step (5) loads potential interference source according to the sequence of interference margins from small to large, and monitors electromagnetic interference monitoring and set
Frequency spectrum in the highly sensitive antenna of receiving device band that standby test obtains, observes noise level, when noise level is more than highly sensitive reception
When device sensitivity, it is believed that the potential interference source being powered on recently interferes highly sensitive receiving device, records the interference source, it
After close the interference source, load new potential interference source, otherwise, then without closing the interference source, be loaded directly into new potential dry
Source is disturbed, until identified all interference sources have loaded in step (3), determines interference in highly sensitive antenna of receiving device band
Source.
4. interference source in highly sensitive antenna of receiving device band according to claim 1 or in 3 described in any item microwave load satellites
Determine method, it is characterised in that: the standard shielded darkroom is for the signal of 1~18GHz of frequency range, and shield effectiveness is at least
It should reach: 80dB, while the signal of 1~1000MHz for frequency range, shield effectiveness should at least reach: 90dB.
5. interference source in highly sensitive antenna of receiving device band according to claim 1 or in 3 described in any item microwave load satellites
Determine method, it is characterised in that: the potential interference is to two equipment of transmitting-receiving to constitute interference, highly sensitive receiving device conduct
Receiving device, when transmitting signal fundamental wave, harmonic wave, subharmonic, the clutter of transmitting equipment fall into the main passband of highly sensitive receiving device
When in mirror image passband, then the transmitting equipment and highly sensitive receiving device constitute potential interference pair.
6. interference source in highly sensitive antenna of receiving device band according to claim 1 or in 3 described in any item microwave load satellites
Determine method, it is characterised in that: the potential electromagnetic interference is interfered comprising two types between two equipment, respectively between antenna
Both coupled interference and shell leakage interference, step (3) calculate separately the interference margins that potential interference interferes two types, take
Interference margins of the maximum value as electromagnetic interference pair.
7. interference source determines method in highly sensitive antenna of receiving device band in microwave load satellite according to claim 6,
It is characterized by: the interference margins IM that coupling type interferes between the antenna is calculated using following equation:
IM=P (fE)-LCE1-Lt-Ltr-Lr-PR(fR)
In formula,
P(fE) it is the center frequency point f that transmitting equipment emits signalECorresponding power；
LCE1Emit power of the signal at receiving device center frequency point relative to function at transmitting signal center's frequency point for transmitting equipment
The attenuation of rate, unit dB；
LtFor transmitting equipment and transmitting antenna between at receiving device center frequency point corresponding feeder loss, unit dB；
LtrIsolation between receiving and transmitting, unit dB；
LrBetween receiving device and antenna of receiving device at receiving device center frequency point corresponding feeder loss unit dB；
PR(fR) be in response frequency be fRWhen, receiving device susceptibility threshold, unit dBm, fRFor the centre frequency of receiving device.
8. interference source determines method in highly sensitive antenna of receiving device band in microwave load satellite according to claim 6,
It is characterized in that the interference margins IM of the shell leak type interference is calculated using following equation:
IM=E1-20log(R)+20log(λ)+20log(GR)-127-Ispace-PR(fR)
In formula, E1Unintended radiation for the transmitting equipment of potential interference centering emits field strength, unit dBuV/m；
R is the distance between receiving device sensitive reception antenna of the transmitting equipment of potential interference centering apart from potential interference centering,
Unit m；
λ is that the receiving device of potential interference centering receives the corresponding signal wavelength of working frequency, unit m；
GRFor the gain of the receiving device receiving antenna of potential interference centering, unit dB；
IspaceThe degree of screening caused by satellite structure between jamming equipment and antenna, unit dB；
PR(fR) be in response frequency be fRWhen receiving device susceptibility threshold, unit dBm；
fRFor the centre frequency of receiving device.
9. interference source determines method in highly sensitive antenna of receiving device band in microwave load satellite according to claim 1,
It is characterized in that the microwave absorbing property of the absorbing material is not less than 30dB.
10. interference source determines method in highly sensitive antenna of receiving device band in microwave load satellite according to claim 1,
It is characterized in that the pre-determined threshold is -3dB~0dB.
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| CN107918703B (en) * | 2017-11-10 | 2021-04-20 | 天津航天机电设备研究所 | Design method for wide-band radio frequency receiving satellite unintentional radiation emission limit value |
| CN108169588B (en) * | 2017-12-06 | 2020-01-31 | 广东核电合营有限公司 | Anti-interference capability detection method and system for nuclear power station protection cabinet |
| CN110703213B (en) * | 2019-10-09 | 2021-12-21 | 中国舰船研究设计中心 | Radar interference environment equivalent physical simulation method and device |
| CN113408106B (en) * | 2021-05-27 | 2023-08-01 | 北京国电高科科技有限公司 | Antenna-start constellation communication load EMC analysis model and EMC characteristic improvement method |
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| CN114065467B (en) * | 2021-08-30 | 2022-05-10 | 北京航空航天大学 | Equipment sensitivity threshold design method based on antenna harmonic wave and spurious wave output |
| CN114024883B (en) * | 2021-11-05 | 2023-11-17 | 江西洪都航空工业集团有限责任公司 | Method, device and system for open-loop parallel testing of multiple products of data link |
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