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Improved band-notch technique for ultra-wideband antenna

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5 Author(s)
Naser-Moghadasi, M. ; Fac. of Eng., Sci. & Res. Branch, Islamic Azad Univ., Tehran, Iran ; Sadeghzadeh, R.A. ; Asadpor, L. ; Soltani, S.
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This study describes a compact ultra-wideband (UWB) antenna that exhibits desirable band-notch and gain characteristics. The antenna consists of a rectangular aperture etched on a printed circuit board's ground plane that is excited by a taper shaped patch. The antenna's broadband matching impedance is enhanced by inserting periodic open-end stubs (POES) on the inside edge of the rectangular aperture. A band-notch function to eliminate the WLAN interfering signals between 5 and 6'GHz is created on the proposed antenna using three different techniques. It is shown that the frequency of the band-notch characteristic can be tuned by varying the parameters of the notching structure. The antenna was fabricated and its performance measured to validate its feasibility and the band-notch techniques. A compact aperture area of 12'23'mm2 is realised which exhibits an excellent voltage standing wave ratio (VSWR) performance and stable radiation patterns over the UWB spectrum.

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:4 ,  Issue: 11 )