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 $( ka = 0.8 \lt 1)$ due to its zeroth order resonance (ZOR) property with an overall electrical dimension of $0.16 \lambda _{0} \times 0.19 \lambda _{0}\, \times 0.004 \lambda _{0}$ at 2.16 GHz and an overall antenna dimensions of $23 \times 27 \times 0.6$ mm3. 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 S11 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 S11 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.