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Band-reject ultra-wideband monopole antenna using patch loading

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4 Author(s)
Koohestani, M. ; Inst. de Telecomun., Univ. Tec. de Lisboa, Lisbon, Portugal ; Pires, N. ; Skrivervik, A.K. ; Moreira, A.A.

Proposed is a new simple technique for achieving band rejection characteristics in ultra-wideband monopole antennas. Two band notches were added to an existing UWB antenna by gluing a padding patch printed on a small single-layer piece of commercial substrate. The design of the new proposed structure has a controllable rejection in the 5 GHz WLAN and 8 GHz ITU frequencies while maintaining a wideband performance from 2.9 GHz to more than 12 GHz based on VSWR ≤ 2. A good agreement between measurement and simulation was achieved. Measurements confirm that the technique introduces negligible antenna radiation pattern distortion except at the notched frequencies.

Published in:

Electronics Letters  (Volume:48 ,  Issue: 16 )