RCS Analysis of scaled down chaff clouds using Ansys ED(HFSS) to understand the behaviour of real time model

Abstract

Chaff is an Electronic counter measure used by the Air Force and Navy, to generate false target to confuse enemy radar tracking. It comprises of large no. of dipole of different lengths scattered in atmosphere, forming a cloud. Chaff cloud has a dynamic RCS whose value depends upon various factors for e.g. shape, size, orientation, length of dipoles present in the chaff cloud, as well as blooming radius and spacing between them. Thus an efficient study of RCS of chaff cloud becomes very important. The present paper deals with Monostatic RCS analysis of chaff clouds using HFSS software, with each cloud varying in the length of dipole and number of dipoles used from another cloud. The RCS analysis of the experimental chaff designed in HFSS would help us to understand the behaviour of the clouds dispensed in atmosphere efficiently and the results obtained can easily be extrapolated to understand the RCS behaviour of real time chaff clouds.