Compact Wideband Low-Profile Single-and Dual-Polarized Dielectric Resonator Antennas Using Dielectric and Air Vias

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Journal / PublicationIEEE Transactions on Antennas and Propagation
Publication statusOnline published - 17 Jun 2021

Abstract

A low-profile DRA employing dielectric and air vias is investigated. The structure is realized utilizing PCB technology only. The dielectric vias are formed by filling up cylindrical holes with barium strontium titante (BST) nano particles with a dielectric constant of 20 and loss tangent of 0.023. Using this technique, the antenna can be made compact, without the need of using external, high dielectric-constant materials that are unavailable for standard PCB manufacturing. By skillfully arranging air vias inside the DRA, the resonant frequencies of different modes can be controlled and a wide impedance bandwidth with stable radiation performance can be achieved. The whole antenna structure can be manufactured using standard PCB materials and manufacturing technologies. Our prototype achieves a wide measured impedance bandwidth of 47.5% and a maximum measured gain of 6.84 dBi. Furthermore, a small antenna footprint of 0.6160.616 λ02 with a low profile of 0.095 λ0 is achieved, where λ0 is the wavelength in air at the center frequency. A dual-polarized antenna is investigated using this design technique. It achieves an overlapping bandwidth of 34.88% of its two ports with an isolation of higher than 25.76 dB and stable radiation performance across the passband.

Research Area(s)

  • Dielectric resonator antenna, dielectric vias, dielectric materials, BST, wideband antenna, low profile, dualpolarized antenna