In this article, band pass cylindrical double‐layer frequency selective surfaces (FSSs) are investigated using method of moment (MOM). “Plus”‐shaped slots are used to design the FSSs. The dielectric substrate is considered as air. A good bandwith and sharp roll off are achieved for curved FSS. Theoretical and measured investigations have been done by FEKO simulator and microwave test bench setup, respectively.
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
This letter presents a new technique to fabricate aperture type cylindrical frequency selective surface (FSS) with circular, tripole, and plus shaped element. The cylindrical FSSs exhibit band pass property from 5 to 9 GHz, 11.75 to 14.75 GHz, and 7 to 14 GHz, respectively. A novel method with aluminium foil paper is suggested for fabrication. Cylindrical FSS is fabricated with this technique in laboratory with commercially available aluminium foil paper and is measured practically. In this technique, with the help of laser cutting machine 0.01 mm precision label can be achieved. Both simulated and measured results are in good agreement. The aluminium foil paper made FSS proved to be very light weight, flexible and low cost.
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