Application of Metallic Strip Gratings for Enhancement of Electromagnetic Performance of A-sandwich Radome

Abstract

Enhancement of the electromagnetic (EM) performance characteristics of A-sandwich radome wall over X-band using metallic strip gratings is presented in this work. Equivalent transmission line method in conjunction with equivalent circuit model (ECM) is used for modeling the A-sandwich radome panel with metallic strip gratings and the computation of radome performance parameters. Metallic strip grating embedded in the mid-plane of the core and those in the skin-core interface are the configurations considered in the present work. For a given thickness of metallic strip grating, its width and pitch are optimized at different angles of incidence such that the new radome wall configuration offers superior EM performance over the entire X-band as compared to the conventional A-sandwich wall. The EM analysis shows that the superior EM performance of A-sandwich with metallic strip gratings makes it suitable for the design of normal incidence and streamlined airborne radomes.

Investigations on Monolithic Radome Interactions with Active Electronically Scanned Array on Fighter Platform

“…Previously very limited studies are reported on effects of radome on the active array radiation patterns [19][20][21][22][23] . Studies have been carried out to understand the electrical performance of A-sandwich radome by strip loading 24. A thick FSS radome wall has been proposed for airborne application based on mode-matching generalised scattering matrix approach 25 .…”