Active Scattering Cancellation Using a Microstrip Antenna Element

Abstract

A technique for reducing the scattering (i.e., radar cross section) of a given object in a fixed direction is presented, which makes use of a radiating microstrip patch antenna element. The system is designed so that the radiation from the patch cancels a radar signal reflected from the object in a specified direction at the carrier frequency of the radar signal, and therefore reduces the time-varying radar signal that is scattered from the object in the specified direction for an incident time-varying radar pulse that arrives from a known direction. Applications include spectral coexistence and EMI reduction from radars.