Compact dual-band ring dielectric resonator antenna with moon-shaped defected ground structure for WiMAX/WLAN applications

In this article, compact ring-shaped dielectric resonator antenna (DRA) along with moon-shaped defected ground structure (DGS) was studied. The proposed antenna was fed by microstrip line shifted from center position, which excited TE01 mode in ring DRA. Moon-shaped DGS was acting as a radiator and also reduced the size of proposed antenna by an amount of 14.87% (lower frequency band) and 48.77% (upper frequency band). The proposed antenna was designed to resonate at two different frequencies namely 2.24 and 5.82 GHz with a fractional bandwidth of 30.17% and 22.14%, respectively. Based on optimized design parameters, archetype of antenna structure has been constructed and measured successfully, which shows good agreement with simulated ones. The proposed antenna design was suitable for WLAN (2.4/5.2/5.8 GHz); WiMAX (2.5/5.5 GHz); AMSAT (5.6/5.8 GHz); and WAVE (5.9 GHz) bands. (c) 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:503-511, 2016.