LAUSR

A novel approach to realise the wideband and polarisation-independent radar cross-section (RCS) reduction of a slot-coupled patch antenna is proposed. The RCS reduction is based on the unique reflection phase properties of artificial magnetic conductor (AMC) and perfect electric conductor (PEC) cell. By using the quasi-fractal structure in AMC design, 180° ± 37° reflection phase difference between AMC and PEC cells is obtained over 109% (6.4-21.7 GHz) frequency range. Then, the two different unit cells are applied properly to a slot-coupled patch antenna for wideband RCS reduction. The simulated and measured results indicate that the proposed antenna realises a remarkable RCS reduction between 6.0 and 30.0 GHz for both phi- and theta-polarised waves. Moreover, the radiation characteristics of the antenna are well kept simultaneously.