Mutually Coupled Dielectric Resonators for On-Chip Antenna Efficiency Enhancement

Abstract

Dielectric Resonator Antennas (DRA) are designed for high efficiency operation utilizing the low dielectric losses of appropriately chosen materials. Although the mode and thus the resonance frequency is determined by the dielectric resonator, the (metal) structure used for excitation needs to fit the resonance frequency as well. This paper presents a novel method of using dielectric resonators as coupling elements into free space. The resonance frequency is determined by the exciting grounded $\lambda$ -dipole, the dielectric resonators are driven approximately at eigenresonance. A close proximity of the dielectric resonators (DR) enforces a coupling which leads to fringing fields contributing to the radiation. Finally, an increased radiation efficiency is predicted for the on-chip enviroment at 220 GHz.