Microstrip Line Fed Two Element

E-Plane HDRA Antenna Array

Goffar Ali Sarkar and Susanta Kumar Parui

Abstract Antenna array is very much needed for high gain, beam shaping wireless applications. In this paper, a two-element hemispherical dielectric resonator antenna (HDRA) for E-plane beam shaping has been studied. Microstrip line has been used for excitation of the antenna array element. The antenna offers impedance bandwidth of 6.25% and peak gain of 9.3 dBi.

Keywords HDRA · Antenna array · Peak gain · Impedance bandwidth · Beamwidth

1 Introduction

Since the 1960s, after the invention of low-loss ceramic materials, dielectric resonator (DR) has been used as a high Q-element in microwave circuits such as oscillators, filters, and so forth [1, 2] where DR is made of high permittivity material. After the first work published by Stuart et al. in 1983, the researcher started an investigation on DR as an antenna element [3]. A wide investigation is carried out and vivid update is given in two books [4, 5]. DRA gets immense attention by the researchers due to its attractive features such as low loss, low profile, wide impedance bandwidth, ease of fabrication, ease of excitation, high radiation efficiency, etc. DRA can be excited by all the feeding methods used in conventional patch antenna such as aperture coupled [6, 7], probe coupled [8, 9], microstrip line coupled [10, 11], conformal strip coupled [12], co-planar waveguide feed, and so on.

In many applications with single-element antenna, we cannot achieve desired specifications such as high gain, directional radiation patterns. To meet those demands antenna array is needed. A number of works are carried out on two-element antenna arrays [13–17]. All the studies were carried out is on cylindrical, rectangular, and

G. A. Sarkar (B) · S. K. Parui

Department of Electronics and Telecommunication Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal, India

e-mail: goffar.ali@gmail.com

R. Bera et al. (eds.), Advances in Communication, Devices and Networking, Lecture Notes in Electrical Engineering 537,

https://doi.org/10.1007/978-981-13-3450-4_20