Investigations on polarization rotation reflective surface based on artificial magnetic conductor in microstrip patch antenna

Abstract

Radar Cross Section (RCS) reduction in antennas has received special attention in stealth and detection technology. Several techniques have been designed for RCS reduction in antennas. This thesis presents novel Polarization Rotation Reflective Surfaces (PRRS) that can attain multiband and broadband RCS reduction without deteriorating antenna s radiation characteristics. In particular, it can be used in low observable platforms where the antennas are the main contributors on scattering. In this concise presentation, three different PRRSs namely split ring PRRS, L-shape stepped PRRS and complementary stacked quasi fractal patch combined with logarithmic stepped patch PRRS are proposed. The proposed work is divided into two main phases. The first phase intends to design three different PRRSs and to analyze its reflection phase characteristics. The second phase employs the designed PRRSs as superstrate to a microstrip patch antenna operating at 9 GHz to provide multiple functionalities like improved radiation characteristics, circular polarization and broadband RCS reduction. The primary planning focuses on the existing schemes for inferring the progression of PRRS and to examine the requirement for refining the PRRS design. In general scenario, the most compelling challenges in RCS reduction of antennas consist of trade-off enclosed by narrow RCS reduction bandwidth, low Polarization Conversion Ratio (PCR), degradation in antenna s radiation characteristics and complexity. Ultimately, the constraints in the applications of PRRS are tested. The emerging polarization rotation mechanisms are extensively used in the low observable platforms. The simulated results are proven with split ring PRRS, L-shape stepped PRRS and complementary stacked quasi fractal patch combined with logarithmic stepped patch PRRS and are newline