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Author: search.filters.author.Anantrasirichai, NoppinSubject: search.filters.subject.Band-notched

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    Rectangular slot antenna with Asymmetrical conductor strip for bandwidth enhancement coverage UWB standard
    (2014-01-01)
    Archevapanich, Tuanjai
    ;
    Rakluea, Paitoon
    ;
    Anantrasirichai, Noppin
    ;
    Purahong, Boonchana
    ;
    Chutchavong, Vanvisa
    This paper presents the bandwidth enhancement of rectangular slot antenna fed by microstrip line on the flexible Mylar Polyester film substrate. Asymmetrical conductor strip is designed and inserted in the rectangular slot to extend the bandwidth from 3.06 GHz to 7.2 GHz frequency range. Besides, the rectangular conductor at the end of the feeding microstrip line is introduced for increasing the bandwidth at high frequency up to 12.32 GHz. This improved antenna to cover standard frequency range of UWB (3.1 GHz – 10.6 GHz). Finally, as to reject the frequency band of IEEE 802.11a (5.15 GHz – 5.35 GHz), the line strip at the side of tuning stub is added. In this case, the band-notched frequency from 5.15GHz to 5.38 GHz can be easily obtained.
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    Controllable band-notched slot antenna for UWB communication systems
    (2012-10-01)
    Kueathaweekun, Weerathep
    ;
    Anantrasirichai, Noppin
    ;
    Benjangkaprasert, Chawalit
    ;
    Nakasuwan, Jintana
    ;
    Wakabayashi, Toshio
    We propose a slot antenna consisting of a rectangular slot on the ground plane, fed by a microstrip line with a rectangular-ring-shaped tuning stub that can be deployed in ultra-wideband (UWB) communication systems to avoid interference with wireless local area network (WLAN) communication. Our antenna can achieve a single band-notched property from the 5 GHz frequency to the 6 GHz frequency owing to a controllable band notch that uses L- and J-shaped parasitic elements. The antenna characteristics can be modified to tune the band-notched property (4 GHz to 5 GHz or 6 GHz to 7 GHz) and the bandwidth of the band notch (1 GHz to 2 GHz). Furthermore, the shifted notch with enhanced width of the band notch from 1 GHz to 1.5 GHz is described in this paper. The UWB slot antenna and L- and J-shaped parasitic elements also provide the band-rejection function for reference in the WiMAX (3.5 GHz) and WLAN (5 GHz to 6 GHz) regions of the spectrum. Experiment results evidence the return loss performance, radiation patterns, and antenna gains at different operational frequencies. © 2012 ETRI.