Triple-band dual-polarized hybrid cylindrical dielectric resonator antenna with hybrid modes excitation

Abstract

In this article, a dual-polarized hybrid cylindrical dielectric resonator antenna (CDRA) is studied. A ring-shaped patch along with an inverted L-strip is used to excite two different hybrid modes (HE11δ and HE12δ-like mode) in CDRA. HE12δ mode in CDRA is very advantageous in terms of gain and radiation characteristics. The proposed antenna design shows triple-band characteristics, i.e., 1.88– 2.06 GHz, 2.29–2.58 GHz and 2.9–3.93 GHz with the fractional bandwidth of 9.13%, 11.9% and 30.16%, respectively. Due to inverted L-strip, it shows circular polarization characteristics within the frequency range 3.3–3.55 GHz (AR < 3 dB). The simulated results are practically verified by using archetype of proposed antenna structure. The proposed antenna design is applicable to WLAN (2.4 GHz) and WiMAX (2.5/3.5GHz) applications.