Frequency Tunable Rectangular Dielectric Resonator Antenna - DRA - Physics Assignment Help

Assignment Task

Abstract

A rectangular dielectric resonator antenna (DRA) with frequency tuning capability has been developed. By introducing a metallic side wall with adjustable shorting tabs, the resonant frequency of a prototype DRA was tuned between 3.2 and 5.8 GHz. This configuration is amenable to dynamic tuning through use of PIN or varactor diodes.

Introduction

The design flexibility offered by dielectric resonator antennas (DRAs) make them attractive alternatives to other low-gain antennas such as microstrip or dipoles [1, 2]. To date, only a limited amount of research has been carried out on DRAs with dynamically controlled frequency tuning. Antennas with frequency tuning capability have potential use in several applications including ones using frequency hopping spread spectrum techniques and in software defined radios. One method offrequency tuning for DRAs was achieved by using ferrite material, whose resonant frequency could be altered by the application of a static magnetic field. A tuning range from 9.4 to 11.4 GHz was demonstrated in [3]. The advantage of the ferrite DRA is that any frequency can be selected within the tuning range by adjusting the magnetic field bias strength.

Rectangular DRA Prototype

Various techniques have been used to tune the resonant frequency DRAs, including the use of stubs, slots or metal loading [6-10]. These approaches allow for one-time tuning of the resonant frequency and are useful during prototype development, but are not amenable to dynamic frequency control. The approach used in this paper makes use ofthe effect of placing a metal wall along one ofthe faces of a rectangular DRA, which can significantly reduce its resonant frequency, similar to the concept of applying shorting walls to microstrip patches [11-12].

Discussion

The measured return loss and radiation patterns show the feasibility of the proposed rectangular DRA for use as a frequency tunable element. Future work is planned to replace the metal tabs with PIN diodes (for discrete frequencies) and potentially varactor diodes (for continually variable frequencies). The use ofmore tabs will also be investigated to see if finer control ofthe resonant frequency can be achieved. Work is also planned to study the effects of aspect ratio on the maximum tuning range and to look for ways to improve the cross-polarization performance ofthe DRA.

This Management Assignment has been solved by our Management Experts at My Uni Paper. Our Assignment Writing Experts are efficient to provide a fresh solution to this question. We are serving more than 10000+ Students in Australia, UK & US by helping them to score HD in their academics. Our Experts are well trained to follow all marking rubrics & referencing style.
Be it a used or new solution, the quality of the work submitted by our assignment experts remains unhampered. You may continue to expect the same or even better quality with the used and new assignment solution files respectively. There’s one thing to be noticed that you could choose one between the two and acquire an HD either way. You could choose a new assignment solution file to get yourself an exclusive, plagiarism (with free Turnitin file), expert quality assignment or order an old solution file that was considered worthy of the highest distinction.