High Impedance Ground Plane (Higp) Incorporated With Resistance for Radar Cross Section (Rcs) Reduction of Antenna

Abstract

In this paper a novel ultra-thin radar absorbent material (RAM) using HIGP is presented and investigated. Owing to the high impedance property of the HIGP, the thickness of the RAM is about several tenths of the centre wavelength of the absorption band, considerably thinner than conventional absorbers. The absorption band of the RAM is about several hundred megahertz. In the new RAM, lumped resistances are soldered between the patches of mushroom-like high-impedance surface (HIGP). And the metal ground plane of waveguide slot antenna is covered by this new type of RAM. As compared to the slot antenna with a metal ground plane, the measured results show that the radar cross section (RCS) of waveguide slot antenna reduces significantly. This proves that the new HIGP RAM has a good radar absorbing characteristics. The simulations and experiment results have shown that the RCS of antenna is reduced by 7.9 dB and gain is only reduced by 0.9 dB.

A Novel Approach for RCS Reduction Using a Combination of Artificial Magnetic Conductors

“…The use of simple artificial magnetic surfaces, whose reflection coefficient is ρ = +1, has been discussed [14][15][16], highlighting the fact of thickness reduction with respect to the Salisbury screen. Other works [17][18][19] analyze the effect of coating objects with more complex metamaterials.…”

Flexible Uniplanar Artificial Magnetic Conductor

“…In some of the AMCs' prospect applications, such as its use in Radio Frequency Identification (RFID) tags over metallic objects [6], wearable antennas [11][12][13][14] and RCS reduction [42,43], it would be desirable to have the AMC object-shape-adapted. This would require the AMC to be flexible (especially in the case of objects with curved surfaces) but without losing its functionality.…”

A Reflectarray Based on the Folded Sir Patch-Slot Configuration Backed on FSS for Low RCS

“…There are common methods for RCS reduction, including coating with radar absorbing materials [3], employing passive and active cancellation technology [4,5], antenna shaping [6], and using frequency selective surfaces (FSS) [7][8][9][10] as the reflector. The use of an FSS ground plane based on the folded stepped impedance resonator (SIR) configuration is considered in this study.…”