Abstract:
Conventional square loop (SL) and complementary square loop (CSL) based frequency selective surfaces (FSSs) for distinct frequency range are designed, analyzed and compared in this paper. The SL and CSL type FSSs are designed to demonstrate band stop and band pass characteristics for S-band, Ku-Band, Ka-Band, G-band, Terahertz (THz) and Infrared (IR) frequency range respectively. The influence of dielectric substrate and metallic layer on FSS transmission characteristics are also studied for a purpose to identify the appropriate dielectric substrate and metallic layer to design the FSSs to obtain desired operating frequency, bandwidth of stop band and pass band and signal isolation/transmission. It is found that the signal transmission characteristics of FSSs at THz and IR frequencies deteriorates. Also, low lossy substrate materials are desired to improve the signal transmission and isolation levels at THz and IR frequency domains.