Investigation of BaTiO$_3$-NiO composite as compact Dielectric Resonator Antenna

TL;DR

This paper explores a novel BaTiO3-NiO composite dielectric resonator antenna optimized for C-band wireless communication, demonstrating reduced permittivity and loss tangent suitable for practical antenna applications.

Contribution

It introduces a new BaTiO3-NiO composite material for dielectric resonator antennas and provides both experimental and simulation validation of its performance in the C-band.

Findings

Achieved a resonant frequency of ~7.27 GHz in simulations.

Reduced permittivity and loss tangent in the composite material.

Demonstrated suitability for C-band wireless communication applications.

Abstract

A compact dielectric resonator antenna has been fabricated on a microstrip transmission line for the purpose of C-band wireless communication using a ceramic material made out of a sintered mixture of BTO and NiO. The antenna parameters are optimized using Ansys HFSS software and verified experimentally. Ni replaces both Ba at A site and Ti at B site. Such a solid solution has a limit depending on the amount of NiO provided during sintering. A complete study of the structural changes and the dielectric constant enables the correlation with the resonating property. All the samples retain the ferroelectric tetragonal P4mm phase with a nominal decrease in the c/a ratio. NiO incorporation in BTO decreases the sintering temperature and shows two types of morphology associated with BTO-like and NiO-like phases. It induces prominent reduction in the permittivity and loss tangent (<0.01) in the range 100Hz to 1MHz. These properties make these samples suitable for DRA application in the C-Band range [4-8 GHz]. Experimental and theoretical assessment using HFSS software yields a C-band signal at ~7.27 GHz.