Design of Dielectric Resonator Antenna Using Dielectric Nanoparticle Paste for Wireless Communications

Project: Research

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Over the past two decades, wireless communications have been developing more rapidly than ever. Today, many wireless technologies are extensively used in our daily life, as reflected by the high possession rate of mobile phones. Antenna, which is the front end of all communications systems, is of utmost importance because it directly affects the quality of the transmitted and received signals. Recently, the dielectric resonator antenna (DRA) has received special attention because of its many advantages such as its small size, light weight, low loss, and ease of excitation.For commercial viability, it is desirable to cut down the cost of a system design. Traditional DRAs are fabricated with ceramics or composite materials. In this project, a low-cost nanoparticle paste will be used to fabricate DRAs. It is made of Barium Strontium Titanate (BST) composite (BA0.67Sr0.33TiO3) that has a nanoparticle size of ~1000nm. The BST composite is mixed with 4-tert-butycatechol (BTC) and Xylene, which are the dispersant and solvent of the BST composite, respectively. After drying, the nanoparticle paste has a dielectric constant of r ~ 20. For the first time, the nanoparticle paste will be poured into plastic structures to produce low-cost DRAs. The prototypes of the plastic structures will be fabricated using a 3D printer. Since wideband systems are needed to increase the rate of data transmission and the number of communication channels, both the basic and wideband designs will be investigated.The nanoparticle paste will also be used as dielectric vias to integrate the DRA with a microwave substrate, known as the substrate-integrated DRA (SIDRA). Since the SIDRA is integrated with a substrate, it is convenient to build a DRA array without the need of aligning or bonding with the antenna elements. Different effective dielectric constants will be obtained by changing the size of the dielectric vias. The result will be used to design a wideband multi-layered SIDRA.The radiation characteristics of the DRAs will be investigated theoretically and experimentally. ANSYS HFSS will be used to simulate each DRA, whereas CST Microwave Studio will be used to study the effective dielectric constant of the vias-loaded substrate. Design curves will be obtained to facilitate designs of the DRAs. 


Project number9042834
Grant typeGRF
Effective start/end date1/12/19 → …