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Planar band-notched ultra-wideband antenna with square-looped and end-coupled resonator

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2 Author(s)
Wu, S.-J. ; Dept. Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan ; Tarng, J.-H.

A square-looped and an end-coupled resonator used in a planar ultra-wideband (UWB) antenna to achieve band notched performance are presented here. To obtain notched performance in the wireless local area network band, both the square-looped and end-coupled resonator are designed and placed in a fork-shaped UWB antenna centre. The characteristics and schematic equivalent circuit of each resonator are also discussed. Parametric studies of a fork-shaped antenna with square-looped resonator are given as an example to explore the operating mechanism. Accordingly, the band-notched antenna can effectively select target bands by adjusting different resonator structures. The proposed antenna features flat gain frequency response and group delay as well as 10-25 dB gain suppression in the notched band.

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:5 ,  Issue: 10 )