RCS Reduction of Patch Array Using Shorted Stubs Metamaterial Absorber

Abstract

A novel design approach for the out of band radar cross section (RCS) reduction of a conventional 2 2 patch antenna arrays using shorted stubs metamaterial absorber (MMA) operating in X-band has been proposed. Firstly, an ultrathin MMA unit cell with a central frequency of 10 GHz is designed and its scattering parameters, absorbance characteristics and polarization sensitivity have been analyzed. Then, a patch antenna array has been designed at a resonant frequency of 7.54 GHz. Simulation and experimental results exhibit that when patch antenna array is loaded with MMA, its monostatic and bistatic RCS response reduces significantly for the horizontal as well for vertical polarization. However, it has negligible influence on the radiation characteristics, whilst the bandwidth, gain and overall performance of patch array preserved simultaneously. Finally, a compatibility of observation achieved between simulated and measured results.

A review of metamaterial absorbers and their application in sensors and radar cross‐section reduction

“…Furthermore, a modified circular ring geometry 68 is proposed with shorted stubs to design dual band MA which helped in RCS reduction of 24.09 dBsm at 11.99 GHz and 7.86 dBsm at 14.28 GHz. Another multilayered MA is proposed to reduce the RCS of a circular patch antenna in which the MA unit cells are placed in a circular fashion around the circular patch for maximum space utilization, illustrated in Figure 19A 69 .…”

Methodology for Design and Development of Microstrip Patch Antenna

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Low-Cost Metamaterial Loaded Microstrip Antenna for Defense Applications

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