4.7 Article

Design of Substrate-Integrated Dielectric Resonator Antenna With Dielectric Vias

Journal

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 69, Issue 9, Pages 5205-5214

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2021.3060054

Keywords

Dielectric resonator antenna (DRA); substrate-integrated antenna; wideband antenna; dielectric vias

Funding

  1. General Research Fund (GRF) Grant from the Research Grants Council of Hong Kong Special Administrative Region, China [CityU 11218819]

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For the first time, dielectric vias were used to design a substrate-integrated dielectric resonator antenna (SIDRA), resulting in a wideband multiring antenna. The wideband behavior is achieved through two different dielectric resonator modes.
For the first time, dielectric vias were used to design a substrate-integrated dielectric resonator antenna (SIDRA). The dielectric vias consist of cylindrical holes drilled into the PCB substrate and filled with presintered nanoparticles of barium strontium titanate (BST). The BST nanoparticles were found to have a dielectric constant of 20, with an approximate loss tangent of similar to 0.05. The dielectric-vias loaded substrate constitutes an effective medium for the DRA design. The dielectric vias are arranged in a concentric manner around a core substrate material region, giving a wideband multiring SIDRA. It was found that the wideband behavior is due to two different dielectric resonator modes, namely, the TE delta 11 mode and TE delta 31 half-mode. The TE delta 31 half-mode is a modified version of the TE delta 31-mode of a regular dielectric resonator and is reported here for the first time. The measured and simulated -10-dB impedance bandwidths of the DRA are 33.4% and 35.8%, respectively.

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