Enhancement of YIG bandwidth efficiency through Ce-doping for dielectric resonator antenna (DRA) applications

YIG is useful for dielectric resonator antenna (DRA) but its narrow size of frequency bandwidth (0.38-0.44 GHz), negatively influenced the DRA performance. An investigation on Ce doped YIG through the conventional solid-state reaction based on the Y3-xCexFe5O12 (Ce-x; x = 0-1.5) system was carried out. Outside the range of 0.1 a parts per thousand currency sign x a parts per thousand currency sign 1.0 where maximum solid solution could be achieved, a new impure phase of CeFeO3 (CIP) to YIG was detected. Ce affected the sample microstructure and reduced the grain size of YIG. For the DRA measurement, the addition of Ce enhanced the bandwidth efficiency (BW %) up to 11.16 %. The radiation patterns of all the samples indicated the omnidirectional characteristic, which suggested that the signal could be received by this dielectric antenna in various positions. Therefore, Ce doped YIG successfully enhanced the operating frequency of the antenna and was suitable for the X-band frequency range applications.