High gain and wide band rectangular DRA Online publication date: Tue, 21-Jun-2016
by Richa Gupta; Rajveer S. Yaduvanshi
International Journal of Ultra Wideband Communications and Systems (IJUWBCS), Vol. 3, No. 2, 2015
Abstract: The paper presented the novel approach of exciting higher order modes in rectangular dielectric resonator antenna (RDRA), higher order modes imparts higher gain and neighbouring mode merging results into enhanced bandwidth. The resonant modes take the real orthogonal basis of antenna currents. Higher order modes provided miniaturisation, gain and large bandwidth including wide design space for polarisation and reconfigurability. Higher order modes generation and control have been presented with simulated and experimental results. The dual excitation of RDRA generated even and odd modes. Space 's' between top and bottom DRAs, controlled modes and shifting of first and third resonant modes towards second mode resulted into merging of all three modes. At higher order modes gain of 9.1 dBi and bandwidth 8.2 GHz has been reported in this work. Mathematical modelling for eigenvalue ωm n p and eigenvector (amplitude coefficients and phase) dm n p and cm n p have been developed for TE and TM modes.
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