In this paper, a microstrip-fed hexagonal shape ultra-wideband (UWB) monopole antenna with triple band-notched characteristics is presented. The antenna consists of a microstrip feed line, a regular hexagonal shape radiation patch with a complementary split ring resonator (CSRR) and a pair of inverted T-shaped conductor-backed planes embedded in the antenna backside. Notched bands can be easily controlled by geometry parameters of the CSRR and conductor-backed planes. The simulated and measured results show that this monopole UWB antenna can offer an operation frequency from 2.93 GHz to 10.04 GHz with -10 dB return loss bandwidth, except three notched bands at 3.31-3.78 GHz, 5.33-5.77 GHz and 7.24-7.72 GHz for rejecting the WiMAX and downlink of X band satellite communication system signals. A good agreement between the measured and simulated results is observed. The proposed antenna provides broadband impedance matching, appropriate gain and stable radiation patterns over its operating bandwidth and can be used in wireless UWB applications.
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