Affiliations: [a] Department of Electrical and Electronics Engineering,
Birla Institute of Technology and Science, Pilani, Rajasthan, India
Correspondence:
[*]
Corresponding author: Jitendra Kumar, Department of Electrical
and Electronics Engineering, Birla Institute of Technology and Science, Pilani,
Rajasthan 333031, India. E-mail: [email protected]
Abstract: In this paper, a theoretical and practical investigation on
microwave dielectric materials for wideband dielectric resonator antennas
(DRAs) is presented. Due to the variety of materials available to antenna
designers, a proper technique to select the best possible material is required.
In this paper Ashby's material selection methodology is used for dielectric
material based antenna systems. Four primary performance indices, impedance
bandwidth (BW), the size of the antenna (λ), radiation
efficiency (η) and resonance frequency
(f_{0}), are used to obtain the desired performance. The
selection chart shows that Roger TMM10, (ε_{r}=
9.8) is the most suitable material followed by "Roger's TMM10i and RO3010"
for DRAs to provide the best performance for wideband applications.
Performances of antenna are verified with rectangular and hybrid design of DRA
in terms of reflection coefficients, radiation pattern, gain and efficiency.
Theoretical work is compared with the simulation and the close agreement
between the two, confirm the validity of this study.
Keywords: Ashby's methodology, material selection, dielectric materials, wideband, dielectric resonator antenna, wireless communication
