Resonant Antenna Based on CRLH TL

Abstract

In this paper, a study of the compact microstrip antenna based on composite right/left handed (CRLH)metamaterial transmission line is presented. The physical size and operational frequencies of the antenna are determined by the CRLH metamaterial’s unit cell. The antenna exhibits monopolar radiation at its fundamental mode of resonant frequency. As it is well known that the composite right/left-handed (CRLH) transmission line (TL)has unique property of an infinite-wavelength wave at specific non-zero frequency because of zero permittivity and permeability [1], [2], [6]. Generally, CRLH includes both LH series C/shunt L and parasitic RH series L/shunt C in its circuit model, resulting in a structure which is LH at lower frequencies and RH at higher frequencies.The operation bandwidth cover the required band widths of the IEEE 802.11 wireless local-area networks (WLAN)standards and worldwide interoperability for microwave access (WiMax) in the 2.97 GHz, 3.345GHz and 3.79 GHz (3.49–3.79 GHz).The zeroth order resonant frequency was found to be at 3.79GHz.