Frequency selection radar antenna housing transmission performance testing system and method based on diffraction suppression
A radar radome and transmission performance technology, applied in radio wave measurement systems, measuring electricity, measuring devices, etc., can solve the problems affecting the test accuracy of FSS radomes, limited electromagnetic wave absorption, and result influence, and achieve accurate measurement of insertion loss performance. , the effect of improving the test accuracy
Active Publication Date: 2015-07-08
CHINA SHIP DEV & DESIGN CENT
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Problems solved by technology
For the test backplane adopting the structural form of laying wave-absorbing materials on wooden boards, there are two problems: one is that the wave-absorbing materials have limited absorption of electromagnetic waves, and part of the electromagnetic wave energy will pass through the wave-absorbing materials and wooden boards; the other is the FSS radome The surrounding embedded metal frame causes the diffraction of electromagnetic waves
These two aspects will affect the test accuracy of FSS radome, especially the latter has a greater impact on the results, and may even lead to completely wrong results
Method used
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[0029] The technical solution of the present invention will be further described below in conjunction with the FSS radome of a certain type of L-band phased array radar.
[0030] refer to figure 1 As shown, the frequency selective radome transmission performance test system based on diffraction suppression of the present invention includes a transmitting antenna 1, a test backboard 2, an FSS radome 3, a receiving antenna 4, a coaxial radio frequency cable 5, and a vector network Analyzer 6, the transmitting antenna 1 and the receiving antenna 4 are placed opposite to each other (satisfying the far-field condition), and the test backplane 2 is vertically placed in the middle of the transmitting antenna 1 and the receiving antenna 4, and the shape of the test backplane 2 is similar to that of the FSS The shape of the radome 3 is matched, and there is a test window 23 in its very center. The FSS radome 3 is fixed on the test window 23 of the test backplane 2 by non-metallic screw...
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The invention discloses a frequency selection radar antenna housing transmission performance testing system and method based on diffraction suppression. The frequency selection radar antenna housing transmission performance testing system based on diffraction suppression comprises a transmitting antenna, a testing backboard, a receiving antenna, a coaxial radio frequency cable and a vector network analyzer, wherein the testing backboard is composed of a metal board and a wave-absorbing material, the metal board faces the receiving antenna, and the wave-absorbing material faces the transmitting antenna. The testing method comprises the steps that (1) the frequency selection radar antenna housing transmission performance testing system based on the diffraction suppression is installed; (2) an FSS antenna housing is installed on the upper portion of the testing backboard, and primary calibration is carried out on a radio frequency access which is located between the transmitting antenna and the receiving antenna and penetrates through a testing window of the testing backboard by means of the vector network analyzer; (3) the FSS antenna housing is fixed on the testing window, and insertion loss parameters of the FSS antenna housing between the transmitting antenna and the receiving antenna are measured by means of the vector network analyzer. The frequency selection radar antenna housing transmission performance testing system and method based on the diffraction suppression have the advantages that due to the fact that a wooden board is replaced with the metal board, influence of electromagnetic wave transmission and diffraction on measurement data is avoided; calibration testing accuracy is further improved.
Description
technical field [0001] The patent of the invention belongs to the field of electromagnetic compatibility testing, and specifically relates to a transmission performance testing system and method of a frequency-selective radar radome based on diffraction suppression. Background technique [0002] Since the Frequency Selective Surface (FSS) material has the characteristics of wide passband, small in-band insertion loss and large out-of-band insertion loss, the radome formed by FSS material can be applied to the radar antenna. In the radar working frequency band, the insertion loss of the FSS radome is lower than 1dB, which has little influence on the radar combat technical indicators; in other frequency bands, the insertion loss of the FSS radome is relatively large, and its electromagnetic characteristics are similar to those of metal plates, which can not only greatly reduce external radar penetration The radio frequency energy of the antenna can also reduce the reflection o...
Claims
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IPC IPC(8): G01R31/00G01S7/40
Inventor 陈亮张政李晶吴楠严海妍田正东
Owner CHINA SHIP DEV & DESIGN CENT