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Abstract
A double-printed C-shape antenna for ultra-band application is proposed in this paper. With two C-shape dipole arms printed on the dielectric substrate and fed by a microstrip line, the antenna realized its ultra-wideband character by multistage impedance conversion. The impedance characteristic, radiation patterns and the transfer function are studied by both numerical simulation and experiment. The radiation patterns are approximately omni-directional with the VSWR < 2 from 3.1 to 10.6 GHz. Both transfer functions and group delay are smooth with linear phase which is valuable for the transmission of UWB signals.