Abstract
This paper presents a compact reconfigurable ultra-wideband antenna with multiple band-notch characteristic. The truncated corners in the rectangular patch are employed to realize the desired ultra-wideband (UWB) operation. The band-notch property in the 3.5 GHz WiMAX and 5.2 GHz WLAN bands are obtained by the conventional C-shaped slots in the radiating patch, and the band-notch performance in the 7.5 GHz X-band is especially realized by introducing a parasitic meandering strip beneath the ground. The reconfigurable band-notch function is achieved by controlling the states of the PIN diodes inserted in the band-notch structures. The overall dimension of the antenna is 19.5 mm × 14 mm. The simulation and experiment results confirm that the antenna can switch between a UWB state, three single band-notch states, three dual band-notch states and a triple band-notch state. Moreover, stable radiation patterns are exhibited.
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