Omni-Directional/Multi-Resonance CPW-Fed Small Slot Antenna for UWB Applications
关键词:
CPW-fed microstrip slot antenna, multi-resonance performance, ultra wideband application摘要
In this paper, a novel multi-resonance small slot antenna with CPW feed-line and square radiating stub, for UWB applications is proposed. The proposed antenna consists of a square radiating stub with an inverted T-shaped slot and a ground plane with a T-shaped slit, which provides a wide usable fractional bandwidth of more than 145 % (1.89 GHz ? 12.43 GHz). By cutting a Tshaped slit with variable dimensions on the ground plane, and an inverted T-shaped slot in the square radiating stub additional resonances are excited and hence much wider impedance bandwidth can be produced, especially at the lower and upper bands. The proposed antenna displays a good omni-directional radiation pattern even at higher frequencies. The designed antenna has a small size of 30×30 mm2. Simulated and experimental results obtained for this antenna show that it exhibits good radiation behavior within the UWB frequency range.
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参考
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