Manipulating the radiation pattern of equilateral triangular dielectric resonator antenna using asymmetric grooves

A new method to manipulate the radiation pattern of a triangular dielectric resonator antenna is proposed here. By engraving asymmetric grooves in the antenna walls, the intensity of electric fields on its walls is adjusted, which, if properly done, leads to an increase in the directivity of the antenna. Then, the possibility of rotating the radiation pattern by creating asymmetric grooves in the antenna wall is investigated. It is proved that by adjusting the ratio of the amplitude of equivalent magnetic currents on the antenna walls, rotation can be created in the main beam of the antenna pattern. The simulation results are validated by measuring the reflection coefficient, radiation patterns, and gain of the DRA. The measured results confirm that the antenna operates from 3.1 to 3.8 GHz and the maximum gain is 9.2 dBi.