Parametric studies on hexagonal ring based aperture and patch type curved frequency selective surface

Abstract

Simulated and experimental investigations on hexagonal ring based aperture and patch type semi cylindrical curved frequency selective surfaces (FSSs) have been presented. Simulated and experimental results are in good agreement. Also, the parametric studies have been done for patch and aperture type Curved FSSs. Curved FSS structures are recently being investigated to design radome or nose of fighter aeroplane. This study will help the researchers to design curved frequency selective structures with both band pass and band stop properties.aperture and patch type, curved frequency selective surface, measurement, multilevel fast multipole method (MLFMM), parametric studies Abstract A missile-borne conformal array antenna with off-axis radiation is designed in this article. 16 inclined radiation elements are connected by a power divider to form a conformal array, which consists of an active patch and a parasitic patch with an open-circuit stub. By coplanar coupled feeding and adjusting the length of the open-circuit stub, the radiation pattern toward axis-direction of missile is realized. Experimental results show the antenna can cover 5.25-5.45 GHz with 210 dB return loss and with off-axis radiation. Due to its excellent electrical performance and conformal ability, it can be widely used on the missiles. K E Y W O R D S conformal array antenna, missile-borne antenna, off-axis radiation

Design of compact patch type curved frequency selective surface

“…But it is very challenging to achieve compactness in curved FSS. Some research on curved FSSs have been done …”

“…There was no measured result for ratification. Begam et al demonstrated broadband (up to 19.45 GHz) and multiresonating frequencies in simulated transmission characteristics by designing fractal semicylindrical FSSs loaded with Koch snowflake and Vicsek fractal elements it was illustrated that 1 GHz transmission band was obtained in Y slot‐loaded curved FSS.…”