In this paper, we present a wideband monopole antenna loaded with Composite Right Left Hand (CRLH) unit cell for mobile applications. By loading one CRLH unit cell, the monopole antenna can achieve wideband and generate an additional resonant mode much lower than the unloaded antenna's normal frequency. The antenna has a compact size of 0.1λ0×0.15λ0 at the lowest resonance frequency. Measured impedance bandwidth is 2000 MHz (1710~3810 MHz), which can cover one more frequency band for WiMAX applications than conventional antenna. Furthermore, it introduces a narrow band for LTE 700 applications. Stable omni-directional radiation patterns make it suitable for mobile terminals.
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