Reduction in Cross-Polar Fields in a DRA: Higher Mode vs. Conduction Current Control Techniques

This work explores a connection between the ground plane (GP) conduction current and higher order HEM
$21\delta$
mode in a cylindrical dielectric resonator antenna in light of cross-polar radiation. Ground plane engineering has been proposed to synthesize these current components. The same structures have been deliberately excited for HEM
$21\delta$
mode. The impact of current synthesis on HEM
$21\delta$
mode and its radiation pattern is studied. Significant suppression of fields due to
$\mathbf{HEM}_{216}$
mode is obtained revealing the role of conduction current on higher order mode.