Abstract
Dielectric resonator antennas find widespread applications in high speed wireless systems because of low loss, compact size and light weight. In this study, performance of a multiband Dielectric Resonator Antenna (DRA) with higher gain and improved radiation efficiency for 3.8 GHz band Wi-Max, fixed point satellite links and 4.8GHz band 5G services and 5GHz wireless networks is presented. The proposed design consists of stacked rectangular dielectric resonator fed by a microstrip line placed above grounded Arlon substrate. Simulation results of the proposed DRA shows dualband operation from 3.65 to 4.45GHz and 4.7 to 5.6GHz with impedance bandwidth of 20.25 and 17.47% respectively. The gain and directivity of the DRA is 8.22 and 8.17dB respectively.
Highlights
Low profile antenna design with Microstrip line and Dielectric resonators has been under extensive research over the last two decades
A Dielectric Resonator Antenna (DRA) consists of a high permittivity dielectric material placed over a ground plane and fed by a coaxial probe or a microstrip line or coplanar waveguide or a slot in the ground plane (Petosa et al, 1998; Kumar and Gupta, 2014).The resonant frequency and impedance bandwidth for a dielectric resonator antenna is a function of shape, permittivity and aspect ratio of the dielectric material
The DRA has a wider impedance bandwidth compared to the microstrip antenna
Summary
Low profile antenna design with Microstrip line and Dielectric resonators has been under extensive research over the last two decades. For high gain and large bandwidth requirements, Dielectric Resonator Antenna (DRA) is preferred over microstrip antennas. The DRA has a wider impedance bandwidth compared to the microstrip antenna. A multiband DRA with cylindrical dielectric resonator and modified microstrip line feed is presented in (Sharma et al, 2017).
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