Wideband RCS Reduction and Gain Enhancement for a Patch Antenna with Broadband AMC Structure

Abstract

In this paper, a simultaneous improvement of radiating and scattering performance for a patch antenna is realized. For achieving the wideband low-scattering property, a broadband AMC structure with orthogonally slot-embedding is proposed and analyzed, which is arranged around the antenna with another square ring unit in a chessboard configuration for phase cancellation. Meanwhile, a gain increment is also achieved due to the coupling between the radiation patch and the broadband AMC structure. Measured results indicate that at least a 10 dB RCS reduction is obtained from 11 GHz to 17.8 GHz. Additionally, the gain of the antenna has also been increased for more than 2 dB between 12 GHz and 13 GHz.

Radar cross‐section reduction of an UWB MIMO antenna using image theory and its equivalent circuit model

“…In References 2, 3, 21, and 22, different types of FSS structures are applied to reduce in‐band 2,3,21 and out‐of‐band 22 RCS. RCS reduction is achieved in References 23 and 24 by utilizing a wideband artificial magnetic conductor (AMC) and wideband meta‐surface structure, respectively. The proposed antennas in References 2, 3, 21‐24 offer neither an omnidirectional radiation pattern nor ultra‐wideband (UWB) performance.…”

Improvements of trapezoid antenna gain using artificial magnetic conductor and frequency selective surface

“…Moreover, the radiation that penetrates into the human cells is a major health concern [13][14][15]. Metamaterials such as Artificial Magnetic Conductor (AMC) and Frequency Selective Surface (FSS) were first used due to its ability to increase gain and improve the radiation performances of the antenna [16][17][18][19].…”