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Multiple Band-Notched UWB Antenna With Band-Rejected Elements Integrated in the Feed Line

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9 Author(s)
Fuguo Zhu ; Surrey Space Centre, Univ. of Surrey, Guildford, UK ; Gao, S. ; Ho, A.T.S. ; Abd-Alhameed, R.A.
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To mitigate potential interferences with coexisting wireless systems operating over 3.3-3.6 GHz, 5.15-5.35 GHz, or 5.725-5.825 GHz bands, four novel band-notched antennas suitable for ultra-wideband (UWB) applications are proposed. These include UWB antennas with a single wide notched band, a single narrow notched band, dual notched bands, and triple notched bands. Each antenna comprises a half-circle shaped patch with an open rectangular slot and a half-circle shaped ground plane. Good band-notched performance is achieved by using high permittivity and low dielectric loss substrate, and inserting quarter-wavelength horizontal/vertical stubs or alternatively embedding quarter-wavelength open-ended slots within the feed line. The results of both simulation and measurement confirm that the gain suppression of the single and multiple band-notched antennas in each desired notched band are over 15 dB and 10 dB , respectively. The radiation pattern of the proposed triple band-notched design is relatively stable across the operating frequency band.

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Antennas and Propagation, IEEE Transactions on  (Volume:61 ,  Issue: 8 )