A DUAL BAND FREQUENCY AND PATTERN RECONFIGURABLE DIELECTRIC RESONATOR ANTENNA

A new approach to obtain frequency and pattern reconflguration in Dielectric Resonator Antenna (DRA) has been proposed. The design consists of two identical aperture coupled DRAs separated by a distance of ‚0. A switchable feed based frequency reconflguration is discussed in which the feed acts as an ideal switch. This design operates at two frequencies viz., 3.6GHz and 5.2GHz. These frequencies are independently tuned using trimmers. Further, the slot length of both the DRAs can be tuned independently using movable shorting pins driven by miniature motors. The shorting pins form a part of the ground plane. By varying the slot length of the DRA, the resonant frequency is controlled which in turn helps in gaining pattern reconflguration. The structure has been designed for lower and middle band frequencies of WLAN, operating between 5.15{ 5.25GHz and 5.25{5.35GHz, respectively. These types of antennas can be employed in MIMO systems for increasing the capacity through Pattern diversity.