A double layer FSS filter for sub-THz applications

Ghavidel, A., M. Kokkonen, and S. Myllymäki. “A double layer FSS filter for sub-THz applications.” Scientific Reports 11, no. 1 (2021): 1-8.

Abstract

This work presents the simulated and measured performance of single- and double-layer frequency selective surface filters for operation at sub-THz frequencies (250 GHz center frequency). They were composed of concentric square loops with a split as a unit cell resonator on top of a low dielectric permittivity, low thickness material (RT5880). Both a single layer filter and a cascaded two layer filter with varied distances were investigated. The simulated bandwidth for the cascaded filter was 27 GHz and 16 GHz and 9 GHz bandwidth measured with a THz-TDS and microwave system.

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