A comparative performance analysis of SRR embedded ferrite superstrate patch antennas

A unique single rectangular patch antenna, working at 10 GHz, with a split ring resonator (SRR) embedded ferrite superstrate has been presented in this paper. DC biasing of the ferrite superstrate results in a change in the main beam of the antenna structure. Two different configurations of the SRR design have been simulated and beam scans of ±12° and ±17° have been observed when the ferrite rods had been biased. A comparison with the beam scan characteristics of the no SRR case show a significant decrease (87.5%) in the antenna thickness and similar beam scans at comparatively much lower DC biasing values. The presented antennas show a slightly less directivity because of the signal losses encountered due to the biased ferrite; this can be improved by using modified superstrate layers.