Compact quad-band cylindrical dielectric resonator antenna with complementary C-shaped defected ground structure

摘要

In this article, compact quad-band cylindrical dielectric resonator antenna (CDRA) with complementary C-shaped defected ground structure (DGS) is examined. The proposed antenna design is excited by annular shape microstrip line. Annular shape microstrip line, at center position and shifted from center position, are used to generate HE12 and HE11 mode in CDRA at 12.1 GHz and 11.6 GHz, respectively. Complementary C-shaped DGS is used to make proposed antenna design compact (approximately half the resonant frequency of CDRA mode). Archetype of antenna structure has been fabricated and experimentally tested. The proposed antenna operates in four frequency bands 3.21-3.63 GHz; 4.83-6.78 GHz; 7.25-7.77 GHz, and 11.76-12.45 GHz with a fractional bandwidth of 14.36%, 23.14%, 3.68%, and 1.88%, respectively. The proposed antenna design is applicable for WLAN (5.2/5.8 GHz) and WiMAX (3.5/5.5 GHz) bands. (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:611-615, 2016