Investigation on dual‐band equilateral triangular shaped dielectric resonator antennas for WLAN applications

In this article, two configurations of dual‐band equilateral triangular dielectric resonator antennas (ETDRAs) for WLAN applications are proposed namely, configuration‐I and configuration‐II. The configuration‐I uses single ETDRA for dual‐band operation; whereas, configuration‐II includes two ETDRAs to operate as a dual‐band antenna. Both the antenna configurations, which uses 99.7% alumina material having a dielectric constant of εr = 9.9, are excited to operate in the bands of 2.4 to 2.5 GHz and 5.75 to 5.85 GHz. The antennas are excited using a conventional coaxial feed to have a simple feeding mechanism. Prototypes of both the antenna configurations are fabricated and measured. The radiation characteristics of the antennas are discussed. The circuit analysis for the proposed configurations of the dual‐band ETDRA is also performed and an appropriate equivalent circuit for each dual‐band ETDRA is presented. Further, the performance of the proposed configurations of the dual‐band antennas are also compared with other dual‐band DRAs reported in the literature.