A Compact Low Profile Modified ACS-fed Triple Band Open-Ended Metamaterial Antenna for UMTS, WLAN, and WiMAX Applications

A new, compact and low profile triple band metamaterial (MTM) antenna based on the open-ended configuration of composite right/left-handed (CRLH) transmission line (TL) is discussed in this paper. The intended antenna obtains a compact size (ka = 0.8 <;1) due to its zeroth order resonance (ZOR) property with an overall electrical dimension of 0.16 λ
₀
× 0.19 λ
₀
× 0.004 λ
₀
at 2.16 GHz and an overall antenna dimensions of 23 × 27 × 0.6 mm
³
. The antenna covers three resonances from (2.14-2.18 GHz), (3.14-3.65 GHz), and (4.59-7.34 GHz) frequency bands with -10 dB S
₁₁
bandwidths of 1.85%, 15.22%, and 49.10% for the three frequency bands. The intended MTM antenna provides an average gain of 2 dBi, 1.2 dBi, and 4 dBi respectively for the three resonances. Measured S
₁₁
shows almost similar result with the simulated result demonstrates that the intended triple band MTM antenna is appropriate for working in the 2.2 GHz UMTS, 3.6/5.2/5.8 GHz WLAN, and 3.3/3.5/5.5 GHz WiMAX applications.