Active radar cross section (RCS) reduction in parallel-fed dipole phased array

The radar cross section (RCS) of an aerospace platform represents its electromagnetic scattering properties. Design and development of phased arrays with reduced RCS, suitable for low observable platforms is a critical issue in defense sector. When such low RCS phased array are mounted on a platform contributes significantly in RCS control. Especially for phased array in radiation mode, RCS reduction may be achieved by using efficient adaptive algorithm. In this paper, the RCS of dipole phased array with parallel feed network is shown to be reduced towards hostile probing sources using modified improved LMS algorithm. The algorithm performance depends on the array design parameters, type of feed network and the signal environment considered. The scattering within phased array system due to impedance mismatch at different component levels are taken into account. It is shown that the parameters such as characteristic impedance, load impedance, number, direction-of-arrival and power level of probing sources controls the extent of RCS reduction towards probing sources.