CN104133119A - Broadband RCS test method based on multiplexer - Google Patents
Broadband RCS test method based on multiplexer Download PDFInfo
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- CN104133119A CN104133119A CN201410366775.0A CN201410366775A CN104133119A CN 104133119 A CN104133119 A CN 104133119A CN 201410366775 A CN201410366775 A CN 201410366775A CN 104133119 A CN104133119 A CN 104133119A
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Abstract
The invention provides a broadband RCS test method based on a multiplexer. In an RCS test system, a traditional manual antenna replacement mode is replaced with a single-input and multi-output mode of the multiplexer, and then a rotary table for tests is used in cooperation to rotate to finally complete the RCS test on a target to be tested. Through the scheme, on the premise that the existing test software, the existing processing algorithm and the existing processing procedure are not changed, broader frequency range coverage is achieved, multiple-frequency-band tests can be completed through one frequency sweep, and the problem that efficiency of traditional RCS tests is low can be effectively solved.
Description
Technical field
The invention belongs to broadband RCS technical field of measurement and test, in particular a kind of broadband RCS method of testing based on multiplexer.
Background technology
The RCS of target (RCS) characteristic is a broadband index normally, therefore need to be under very wide frequency range the RCS value of test target.
RCS characteristic test for target, from hardware system, its theory diagram as shown in Figure 1, mainly main control computer 10, vector network analyzer 12, test table 18 and turntable controller 11 thereof, receiving antenna 15, emitting antenna 14 and low scattering support 17 etc., partly consist of, each several part completes test job jointly by cooperation.The concrete test process that the far field test of take is example introducing system as: first dual-mode antenna is erected on antenna holder 13, target 16 to be measured or calibration is placed at a distance on turntable 18 low scattering support 17 above by Metal Ball, first system is carried out to RCS calibration, elder generation's known standard metal ball of fixed RC S characteristic on the low scattering support 17 of turntable, main control computer 10 is by the total line traffic control vector network analyzer 12 of LAN, under it is controlled, vector network analyzer 12 produces continuous wave pumping signal, by emitting antenna 14, radiate, be irradiated to Metal Ball 16, the signal reflecting is sent in vector network analyzer 12 receiving ports after receiving antenna 15 receives, vector network analyzer 12 is processed to the received signal, main control computer 10 obtains original test data from vector network analyzer 12 by LAN bus, thereby obtain one group of data as frequency response item, again standard metal ball is removed, measure background signal as isolation, completion system calibration.Again measured target 16 is fixed on low scattering support 17, by controlling the rotation of turntable 18, just can obtains the RCS characteristic of the different directions of measured target.
The RCS of target (RCS) characteristic is a broadband index normally, therefore need to be under very wide frequency range the RCS value of test target.Owing to conventionally adopting standard horn antenna as dual-mode antenna, and the frequency range of antenna is limited, therefore in test process, in order to cover very wide frequency range, just need the dual-mode antenna of constantly changing different frequency range to test respectively again, and test result is merged, finally obtain the very RCS characteristic under wide frequency ranges of target.For this conventionally test method, owing to need to repeatedly changing dual-mode antenna and repeatedly testing just, can obtain complete result, so test period is long, efficiency is lower.For improving measuring speed, reduce the test duration, this programme plan takes multiplexer to coordinate many group antennas to realize the scheme that within the scope of wide-band, RCS tests fast, and this technology can provide an approach that reduces total testing time, thereby improves testing efficiency.
For the WB-RCS method of testing based on conventional, its testing procedure is system boot preheating, measurement parameter setting, background test, calibration ball test, target detection to be measured, data processing, frequency range 2 tests, frequency range n test.
By analyzing domestic and international list of references and similar techniques, the RCS test single channel method of testings that adopt more.For single channel RCS method of testing, because dual-mode antenna adopts standard-gain horn antenna mostly, in order to increase systematic survey dynamic range, generally need to adopt large gain antenna, this just makes dual-mode antenna frequency range used narrower, when carrying out broadband RCS test, needs often to change dual-mode antenna, cause the test duration longer, and in the process of changing antenna, easily cause that repeatability connects error.
Therefore, there is defect in prior art, needs to improve.
Summary of the invention
Technical matters to be solved by this invention is for the deficiencies in the prior art, and a kind of broadband RCS method of testing based on multiplexer is provided.
Technical scheme of the present invention is as follows: a kind of broadband RCS method of testing based on multiplexer, wherein, comprises the following steps:
Step 1: test macro is set, and described test macro is comprised of system control unit, signal generation and processing unit, orientation control module, channel selecting unit, antenna array unit, measured target;
Step 2: under the control of system control unit, signal produces the pumping signal with processing unit output certain frequency scope, pumping signal is the public port COM port of multiplexer 1 in admission passage selected cell first, through the different frequency range wave filter in channel selecting unit, the frequency range of pumping signal is only corresponding with the i wave band of some wave filters wherein, and in corresponding antenna array unit, emitting antenna i understands radiated electromagnetic wave; Through space, transmission arrives measured target region to electromagnetic wave, electromagnetic wave runs into measured target rear section energy and is reflected, through space, transmission is received by antenna array unit reflected signal, the frequency range of wave filter i in channel selecting unit in multiplexer 2 is consistent with reflected signal, the reflected signal that receiving antenna i receives can be transferred to vector network analyzer by multiplexer 2, to complete one-shot measurement and data acquisition;
Step 3: main control computer carries out orientation rotation by test table in bus control azimuth control module, a synchronizing pulse of a stepping angle output of the every rotation of turntable, trigger vector network analyzer and complete one-shot measurement, finally obtain the complete RCS data of target all angles.
The described broadband RCS method of testing based on multiplexer, wherein, described system control unit is main control computer, for realizing the automatic control of test macro.
The described broadband RCS method of testing based on multiplexer, wherein, described signal produces with processing unit and is comprised of vector network analyzer, for realizing the generation of pumping signal and the processing of reception signal.
The described broadband RCS method of testing based on multiplexer, wherein, described orientation control module comprises test table, turntable controller and low scattering support, for realizing Long-distance Control turntable, carries out orientation rotation, to realize the orientation of measured target, changes.
The described broadband RCS method of testing based on multiplexer, wherein, described channel selecting unit is comprised of the multiplexer 1 of transmission channel and the multiplexer 2 of receiving cable, described multiplexer 1 and described multiplexer 2 comprise multiplexer channel, and the wave filter of a plurality of wave bands, the working frequency range of wave filter is corresponding with the frequency of operation of test antenna.
The described broadband RCS method of testing based on multiplexer, wherein, described antenna array unit comprises transmitting antenna array and receiving antenna array, two arrays consist of two groups of identical high-gain horn antennas, described transmitting antenna array comprises n emitting antenna, described receiving antenna array comprises n, and wherein, a described emitting antenna is corresponding with a receiving antenna.
The described broadband RCS method of testing based on multiplexer, wherein, described measured target comprises calibration ball and target to be measured.
Adopt such scheme, do not change under the prerequisite of existing testing software, Processing Algorithm and treatment scheme, realize wider frequency range and cover, a frequency sweep can complete the test of a plurality of frequency ranges, can effectively solve the low problem of traditional RCS testing efficiency.
Accompanying drawing explanation
Fig. 1 is RCS test philosophy block diagram in prior art.
Fig. 2 is that RCS method of testing of the present invention realizes block diagram.
Fig. 3 is RCS test flow chart of the present invention.
Fig. 4 is multiplexer theory diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
The invention provides a kind of broadband RCS method of testing based on multiplexer, wherein, comprise the following steps:
Step 1: test macro is set, and described test macro is comprised of system control unit, signal generation and processing unit, orientation control module, channel selecting unit, antenna array unit, measured target;
Step 2: under the control of system control unit, signal produces the pumping signal with processing unit output certain frequency scope, pumping signal is the public port COM port of multiplexer 1 in admission passage selected cell first, through the different frequency range wave filter in channel selecting unit, the frequency range of pumping signal is only corresponding with the i wave band of some wave filters wherein, and in corresponding antenna array unit, emitting antenna i understands radiated electromagnetic wave; Through space, transmission arrives measured target region to electromagnetic wave, electromagnetic wave runs into measured target rear section energy and is reflected, through space, transmission is received by antenna array unit reflected signal, the frequency range of wave filter i in channel selecting unit in multiplexer 2 is consistent with reflected signal, the reflected signal that receiving antenna i receives can be transferred to vector network analyzer by multiplexer 2, to complete one-shot measurement and data acquisition;
Step 3: main control computer carries out orientation rotation by test table in bus control azimuth control module, a synchronizing pulse of a stepping angle output of the every rotation of turntable, trigger vector network analyzer and complete one-shot measurement, finally obtain the complete RCS data of target all angles.
In above-mentioned, described system control unit is main control computer, for realizing the automatic control of test macro.
In above-mentioned, described signal produces with processing unit and is comprised of vector network analyzer, for realizing the generation of pumping signal and the processing of reception signal.
In above-mentioned, described orientation control module comprises test table, turntable controller and low scattering support, for realizing Long-distance Control turntable, carries out orientation rotation, to realize the orientation of measured target, changes.
In above-mentioned, described channel selecting unit is comprised of the multiplexer 1 of transmission channel and the multiplexer 2 of receiving cable, described multiplexer 1 and described multiplexer 2 comprise multiplexer channel, and the wave filter of a plurality of wave bands, and the working frequency range of wave filter is corresponding with the frequency of operation of test antenna.
In above-mentioned, described antenna array unit comprises transmitting antenna array and receiving antenna array, two arrays consist of two groups of identical high-gain horn antennas, described transmitting antenna array comprises n emitting antenna, described receiving antenna array comprises n, wherein, a described emitting antenna is corresponding with a receiving antenna.
The described broadband RCS method of testing based on multiplexer, wherein, described measured target comprises calibration ball and target to be measured.
Embodiment 2
On the basis of above-described embodiment, the object of the invention is by disclosing a kind of broadband RCS method of testing based on multiplexer, by optimizing channel selecting disposal route, to broadband RCS, test provides more succinct hardware connection mode, finally reach and reduce to greatest extent repeated manual work, improve the object of measuring speed and measuring accuracy.
The broadband RCS method of testing based on multiplexer that the present invention proposes realize principle as shown in Figure 2.Test macro based on the method is comprised of 1 system control unit, 2 signal generations and processing unit, 3 orientation control modules, 4 channel selecting unit, 5 antenna array units, 6 measured targets.
1 system control unit is comprised of main control computer and system software, realizes the automatic control of whole system.
2 signals produce with processing unit and are comprised of vector network analyzer, can realize the generation of pumping signal and the processing of reception signal.
3 orientation control modules comprise test table, turntable controller and low scattering support, and the program-controlled control turntable of system software carries out orientation rotation, thereby realize the orientation change of measured target.
4 channel selecting unit are comprised of the multiplexer 1 of transmission channel and the multiplexer 2 of receiving cable.Multiplexer comprises multiplexer channel, and the wave filter of a plurality of wave bands, and the working frequency range of wave filter is corresponding with the frequency of operation of test antenna.
5 antenna array units comprise transmitting antenna array and receiving antenna array, and two arrays consist of two groups of identical high-gain horn antennas.As shown in Figure 2, transmitting antenna array comprises emitting antenna 1, emitting antenna 2 ... emitting antenna n, receiving antenna array comprises receiving antenna 1, receiving antenna 2 ... receiving antenna n, wherein, emitting antenna 1 is identical with receiving antenna 1, and emitting antenna n is corresponding with receiving antenna n.
6 measured targets comprise calibration ball and target to be measured.
The present invention and the key distinction of scheme shown in Fig. 1 are multiband, and the implementation of multiple channel test is different in other words.The present invention has realized multichannel automatic selection, has realized the automatic switchover of multiband test, and test philosophy is as follows:
Under the control of system control unit, the pumping signal of vector network analyzer output certain frequency scope, first pumping signal enters the public port COM of multiplexer 1, the wave filter 1, the wave filter 2 that after COM port, connect different frequency range ... wave filter n, the frequency range of pumping signal is only corresponding with the wave band of some wave filters (such as i) wherein, therefore multiplexer 1 only has i passage output signal, and the corresponding emitting antenna i that only has understands radiated electromagnetic wave; Through space, transmission arrives measured target region to electromagnetic wave, electromagnetic wave runs into measured target rear section energy and is reflected, through space, transmission is received by 5 antenna array units reflected signal, the frequency range of wave filter i in multiplexer 2 is consistent with reflected signal, so only have the reflected signal that receiving antenna i receives to be transferred to vector network analyzer by multiplexer 2, thereby complete one-shot measurement and data acquisition.Main control computer carries out orientation rotation by total line traffic control test table, and a synchronizing pulse of a stepping angle output of the every rotation of turntable, triggers vector network analyzer and complete one-shot measurement, finally obtains the complete RCS data of target all angles.
The method of testing of utilizing the present invention to propose, can optimize the flow process that broadband RCS tests, as shown in Figure 3.
Step 1, for guaranteeing the accuracy of testing tool, first needs testing tool to carry out preheating, is generally half an hour;
The test desired parameters that step 2 arranges, comprises several frequency ranges that needs are tested, the speed of test table and measurement stepping angle;
Step 3, when not placing any object, is tested multiband background-noise level.
Step 4 is placed the standard metal ball 16 of RCS value known (determined its RCS value through strict calibration, or can draw its accurate RCS value through theory calculating or emulation), test ambient level now on low scattering support 17;
Step 5 is placed target to be measured on low scattering support 17, test ambient level now;
Step 6 is calculated and is analyzed for three groups of data of each frequency range recording in 3,4,5 processes, finally tries to achieve target to be measured in wide band RCS characteristic.
Furthermore, the invention discloses a kind of broadband RCS method of testing based on multiplexer.In RCS test macro, multiplexer is inputted by a road exactly, and the mode of multichannel output replaces the mode of traditional manual replacing antenna, then coordinates test table rotation finally to complete the RCS test of target to be measured.In this system, by introducing multiplexer, the antenna of different frequency range is once connected with vector network analyzer, reduce test and connected the error of bringing, reduced the test duration, improved measuring accuracy.
To the present invention, in its technical scheme, multiplexer is the emphasis of Project design, and the multiplexer that how to design multi-path, high isolation is the key point of development, and multiplexer schematic diagram as shown in Figure 4.
In sum, adopting on the basis of the broadband RCS method of testing based on multiplexer, by disposable, erect a television antenna, antenna transmission signal is selected corresponding path through multiplexer, with this, realizes and reduces test duration, raising measuring accuracy.
Beneficial effect of the present invention is:
(1) test speed is fast: owing to having adopted the pattern of multiplexer, make once to connect between vector network analyzer and dual-mode antenna, reduce and repeatedly change antenna, thereby reduced total communication time, improved efficiency.
(2) between multiplexer multi-path, isolate high: coordinate antenna band, at the inner wave filter that needs a plurality of corresponding band of design of multiplexer, to meet channel selecting function, between passage, need very high isolation could reduce crosstalking between different paths, improve measuring accuracy.
The present invention has more the testing process of optimizing, and simpler means of testing and test speed faster can be provided, and in broadband RCS field tests, has good value for applications.
Adopt such scheme, do not change under the prerequisite of existing testing software, Processing Algorithm and treatment scheme, realize wider frequency range and cover, a frequency sweep can complete the test of a plurality of frequency ranges, can effectively solve the low problem of traditional RCS testing efficiency.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (7)
1. the broadband RCS method of testing based on multiplexer, is characterized in that, comprises the following steps:
Step 1: test macro is set, and described test macro is comprised of system control unit, signal generation and processing unit, orientation control module, channel selecting unit, antenna array unit, measured target;
Step 2: under the control of system control unit, signal produces the pumping signal with processing unit output certain frequency scope, pumping signal is the public port COM port of multiplexer 1 in admission passage selected cell first, through the different frequency range wave filter in channel selecting unit, the frequency range of pumping signal is only corresponding with the i wave band of some wave filters wherein, and in corresponding antenna array unit, emitting antenna i understands radiated electromagnetic wave; Through space, transmission arrives measured target region to electromagnetic wave, electromagnetic wave runs into measured target rear section energy and is reflected, through space, transmission is received by antenna array unit reflected signal, the frequency range of wave filter i in channel selecting unit in multiplexer 2 is consistent with reflected signal, the reflected signal that receiving antenna i receives can be transferred to vector network analyzer by multiplexer 2, to complete one-shot measurement and data acquisition;
Step 3: main control computer carries out orientation rotation by test table in bus control azimuth control module, a synchronizing pulse of a stepping angle output of the every rotation of turntable, trigger vector network analyzer and complete one-shot measurement, finally obtain the complete RCS data of target all angles.
2. the broadband RCS method of testing based on multiplexer as claimed in claim 1, is characterized in that, described system control unit is main control computer, for realizing the automatic control of test macro.
3. the broadband RCS method of testing based on multiplexer as claimed in claim 1, is characterized in that, described signal produces with processing unit and is comprised of vector network analyzer, for realizing the generation of pumping signal and the processing of reception signal.
4. the broadband RCS method of testing based on multiplexer as claimed in claim 1, it is characterized in that, described orientation control module comprises test table, turntable controller and low scattering support, for realizing Long-distance Control turntable, carries out orientation rotation, to realize the orientation of measured target, changes.
5. the broadband RCS method of testing based on multiplexer as claimed in claim 1, it is characterized in that, described channel selecting unit is comprised of the multiplexer 1 of transmission channel and the multiplexer 2 of receiving cable, described multiplexer 1 and described multiplexer 2 comprise multiplexer channel, and the wave filter of a plurality of wave bands, the working frequency range of wave filter is corresponding with the frequency of operation of test antenna.
6. the broadband RCS method of testing based on multiplexer as claimed in claim 1, it is characterized in that, described antenna array unit comprises transmitting antenna array and receiving antenna array, two arrays consist of two groups of identical high-gain horn antennas, described transmitting antenna array comprises n emitting antenna, described receiving antenna array comprises n, and wherein, a described emitting antenna is corresponding with a receiving antenna.
7. the broadband RCS method of testing based on multiplexer as claimed in claim 1, is characterized in that, described measured target comprises calibration ball and target to be measured.
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| CN110146749A (en) * | 2018-07-18 | 2019-08-20 | 南京洛普科技有限公司 | A kind of Antenna Far Field transmitting terminal automatic test device and its automated testing method |
| CN110703218A (en) * | 2019-10-12 | 2020-01-17 | 西北工业大学 | One-transmitting-multi-receiving combined rotary table rotating double-station scattering measurement system and method |
| CN111277340A (en) * | 2020-01-20 | 2020-06-12 | 杭州仁牧科技有限公司 | High-power broadband emission array actual measurement system and test method thereof |
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| CN113779653A (en) * | 2021-08-02 | 2021-12-10 | 纵目科技（上海）股份有限公司 | Radar antenna test/design method, system, device and readable storage medium |
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| CN110146749A (en) * | 2018-07-18 | 2019-08-20 | 南京洛普科技有限公司 | A kind of Antenna Far Field transmitting terminal automatic test device and its automated testing method |
| CN110703218A (en) * | 2019-10-12 | 2020-01-17 | 西北工业大学 | One-transmitting-multi-receiving combined rotary table rotating double-station scattering measurement system and method |
| CN111277340B (en) * | 2020-01-20 | 2021-12-03 | 杭州仁牧科技有限公司 | High-power broadband emission array actual measurement system and test method thereof |
| CN111277340A (en) * | 2020-01-20 | 2020-06-12 | 杭州仁牧科技有限公司 | High-power broadband emission array actual measurement system and test method thereof |
| CN111766453B (en) * | 2020-06-12 | 2023-03-14 | 中国航发北京航空材料研究院 | Radar scattering cross section test system and method of heating element |
| CN111766453A (en) * | 2020-06-12 | 2020-10-13 | 中国航发北京航空材料研究院 | Radar scattering cross section test system and method of heating element |
| CN111912453B (en) * | 2020-06-15 | 2021-06-08 | 成都飞机工业（集团）有限责任公司 | Device for simultaneously obtaining target three-dimensional moment and angle for RCS test |
| CN111912453A (en) * | 2020-06-15 | 2020-11-10 | 成都飞机工业（集团）有限责任公司 | Device for simultaneously obtaining target three-dimensional moment and angle for RCS test |
| CN112230209A (en) * | 2020-09-28 | 2021-01-15 | 北京环境特性研究所 | Remote double-station RCS measuring device and method |
| CN112230209B (en) * | 2020-09-28 | 2023-06-16 | 北京环境特性研究所 | Remote double-station RCS measuring device and method |
| CN113779653A (en) * | 2021-08-02 | 2021-12-10 | 纵目科技（上海）股份有限公司 | Radar antenna test/design method, system, device and readable storage medium |
| CN113779653B (en) * | 2021-08-02 | 2024-04-16 | 纵目科技（上海）股份有限公司 | Method, system, equipment and readable storage medium for testing/designing radar antenna |
| CN118151112A (en) * | 2024-05-13 | 2024-06-07 | 成都玖锦科技有限公司 | Portable RCS measurement system based on vector network analyzer |
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Application publication date: 20141105 |