Effects of machining accuracy on frequency response properties of thick-screen frequency selective surface

Chunyi Fang; Jinsong Gao; Chen Xin

doi:10.1117/1.OE.51.10.103402

17 October 2012 Effects of machining accuracy on frequency response properties of thick-screen frequency selective surface

Chunyi Fang, Jinsong Gao, Chen Xin

Author Affiliations +

Optical Engineering, Vol. 51, Issue 10, 103402 (October 2012). https://doi.org/10.1117/1.OE.51.10.103402

Abstract

Electromagnetic theory shows that a thick-screen frequency selective surface (FSS) has many advantages in its frequency response characteristics. In addition, it can be used to make a stealth radome. Therefore, we research in detail how machining accuracy affects the frequency response properties of the FSS in the gigahertz range. Specifically, by using the least squares method applied to machining data, the effects of different machining precision in the samples can be calculated thus obtaining frequency response curves which were verified by testing in the near-field in a microwave dark room. The results show that decreasing roughness and flatness variation leads to an increase in the bandwidth and that an increase in spacing error leads to the center frequency drifting lower. Finally, an increase in aperture error leads to an increase in bandwidth. Therefore, the conclusion is that machining accuracy should be controlled and that a spatial error less than 0.05 mm is required in order to avoid unwanted center frequency drift and a transmittance decrease.

Citation Download Citation

Chunyi Fang, Jinsong Gao, and Chen Xin "Effects of machining accuracy on frequency response properties of thick-screen frequency selective surface," Optical Engineering 51(10), 103402 (17 October 2012). https://doi.org/10.1117/1.OE.51.10.103402

Published: 17 October 2012

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