Broadband RCS Reduction of Antenna with AMC Using Gradually Concentric Ring Arrangement

Abstract EN

This paper proposes a new method to the broadband RCS reduction with the artificial magnetic conductor (AMC) surfaces.

The AMC surfaces can introduce a zero-degree reflection phase shift to incident waves.

The phase difference between the antenna and AMC structures is 180°.

Therefore, the AMC structures can be used to achieve RCS reduction.

However, the bandwidth of zero-degree reflection phase of AMC structures is very narrow.

In light of this, a novel gradually concentric ring arrangement AMC (GCRA-AMC) which can be applied to achieve the broadband RCS reduction is presented.

The simulated and measured results show that the radiation performance of antennas is preserved when the GCRA-AMC is used.

The RCS of the antenna with GCRA-AMC has been considerably reduced in a broad frequency band.

The largest RCS reduction is more than 17 dB.