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This paper presents a frequency selective surface (FSS) radome for radar cross-section reduction application. The FSS unit cell comprises a modified Jerusalem cross with a circular ring at the center and extended end-arms acting as a bandpass structure. The overall dimension of the FSS radome is 58 mm × 58 mm × 0.508 mm, designed on a Rogers RT/Duroid 5880 substrate. The electromagnetic analysis of the proposed structure is analyzed using full-wave method-based HFSS software. The results show that the FSS radome exhibits a transmission bandwidth of 117 MHz centered at 2 GHz and rejection bands from 1 to 1.63 GHz and 2.13 to 3 GHz in the out-of-bands. It is also revealed that under oblique incident angles, the radome operation in TE and TM mode polarizations is stable up to 80°. The monostatic RCS spectra in the presence of a metallic reflector illustrate that the in-band RCS reduction is >40 dB.

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Design of a Single-Layered Frequency Selective Surface-Based Radome for RCS Reduction in Modern Radar Systems

  • 会议论文

  • 发表日期：

    2026年

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  • Subodh Narayan Pandharkame,
  • Harikrishna Paik

摘要

This paper presents a frequency selective surface (FSS) radome for radar cross-section reduction application. The FSS unit cell comprises a modified Jerusalem cross with a circular ring at the center and extended end-arms acting as a bandpass structure. The overall dimension of the FSS radome is 58 mm × 58 mm × 0.508 mm, designed on a Rogers RT/Duroid 5880 substrate. The electromagnetic analysis of the proposed structure is analyzed using full-wave method-based HFSS software. The results show that the FSS radome exhibits a transmission bandwidth of 117 MHz centered at 2 GHz and rejection bands from 1 to 1.63 GHz and 2.13 to 3 GHz in the out-of-bands. It is also revealed that under oblique incident angles, the radome operation in TE and TM mode polarizations is stable up to 80°. The monostatic RCS spectra in the presence of a metallic reflector illustrate that the in-band RCS reduction is >40 dB.