A Low Profile Antenna with Ultra-wideband Low Radar Cross Section Characteristic Based on Coding Metasurface

Cihan E. F., Kopar M., Ercek E., SABAH C.

15th European Conference on Antennas and Propagation (EuCAP), ELECTR NETWORK, 22 - 26 March 2021, (Full Text) identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.23919/eucap51087.2021.9411161
  • Country: ELECTR NETWORK
  • Keywords: Low profile antennas, metasurfaces, radar cross section (RCS)
  • Middle East Technical University Northern Cyprus Campus Affiliated: Yes

Abstract

In this article, we propose a design of aperture coupled antenna with ultra-wideband low radar cross section (RCS) characteristics for X band applications. The RCS reduction ranging from 8 to 24 GHz has been realized with two novel artificial magnetic conductor (AMC) unit cells that are placed around the patch antenna. The AMCs have been designed with a 180 +/- 38 degrees phase difference within a frequency range in order to provide an effective phase cancellation. The proposed antenna's operating bandwidth is 8.9-9.8 GHz, corresponding to an impedance bandwidth of 9.6 degrees A and the RCS reduction is mainly in the Ku band. The maximum out-of-hand RCS reduction is 37 dB at 12.7 GHz, while the maximum in-band RCS reduction is 27 dB at 9.2 GHz. The monostatic RCS results of the reference antenna and proposed antenna have been investigated under both theta and phi-polarized plane wave incidence.