A Novel Frequency Selective Surface for the RCS Reduction of Antenna Array

This paper presents a frequency selective surface (FSS) with the characteristics of absorbing electromag-netic(EM) waves at around 14.1 GHz. The unit cell of the FSS is comprised of a back-to-back metal patch with a multi-ring structure in between. The multi-layer structure are generated to realize a bandpass response with a 3-dB bandwidth of 1.05 GHz. Specifically, the symmetrical structure of the unit cell of FSS results in the stable performance in different
$\theta$
and
$\phi$
direction of incident waves. A radome covered by the designed FSS is built to measure the RCS reduction ability of the FSS. The results show that the FSS can well reduce the RCS of the antenna and radome system in this frequency band.