A Novel Singly Fed Wideband Circularly Polarized Rectangular Dielectric Resonator Antenna Using Hook-Shaped Metal Strip

Abstract

: A unique hook-shaped conformal metal strip is used to excite the rectangular dielectric resonator antenna (DRA). The excitation by this unique feed produces circular polarization having a broad bandwidth of ~ 9.2% and the impedance matching band of ~ 10%. However the overlapped bandwidth is ~ 8.3%. The design is further optimized by changing the relative permittivity of DRA material and feed dimensions to enhanced the axial ratio bandwidth to ~ 13% and the impedance matching band to ~ 23.4%. However the overlapped bandwidth in this scenario is enhanced to ~ 11%. The rectangular DRA has been successfully designed and excited by using computer simulation technology (CST), a 3D simulation tool. The calculations are made accurately and the results are validated by using another software tool called High Frequency Structure Simulator (HFSS). The results from HFSS show the same pattern which grantee the validity of the proposed design. ++