Pattern Reconfigurable High Gain Spherical Dielectric Resonator Antenna Operating on Higher Order Mode

This letter proposes a pattern reconfigurable high gain spherical dielectric resonator antenna (DRA) operating on higher order mode. Two microstrip patches were used to excite TE 301 mode in the different direction. A reconfigurable switch network was designed and it has three switching modes for selecting each patch alone or selecting them simultaneously. The proposed antenna can reconfigure its radiation pattern by using a feeding structure, which is consist of two microstrip patches and the reconfigurable switch network. A prototype antenna operating on TE 301 mode at 5.8 GHz was fabricated by ceramic material. By experiment, we validated the new concept of pattern reconfigurable spherical DRA.