Gain and bandwidth controlling of dielectric slab rectangular dielectric resonator antenna

Reconfigurability in an antenna is basic requirement in Military communication. If control on resonant modes can be developed, the antenna will have reconfigurability. This paper presents a control mechanism for Gain and bandwidth using resonant modes in stacked rectangular dielectric resonator antenna. Simply the bands of multiband dielectric resonator antenna are forced to shift their position and consequently the bandwidth of antenna has been improved significantly by merging neighboring bands. Change in the field confinement due to perturbations introduced inside the Dielectric Resonator causes the variation in the gain of antenna.