Circularly Polarized Dual Facet Spiral Fed Compact Triangular Dielectric Resonator Antenna for Sensing Applications

Abstract

In this article, a dual band circularly polarized compact equilateral triangular dielectric resonator antenna (TDRA) is proposed and validated experimentally for microwave sensing applications. An innovative coupling based on dual facet spiral loop is used to bring down the axial ratio <;3 dB. It basically creates the phase excitation on two side walls of the TDRA to ensure circular polarization near 7.5 and 8.7 GHz. In addition to this, the TDRA confirms dual impedance band over (7.32-7.68) GHz and (8.34-9.44) GHz. The demonstration shows good matching between the simulated and measured results. This model can be a suitable candidate for high-sensitive sensing applications.