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Author: search.filters.author.Anantrasirichai, NoppinSubject: search.filters.subject.Tuning stub

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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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    Multiband microstrip-fed right angle slot antenna design for wireless communication systems
    (2009-06-01)
    Rakluea, Paitoon
    ;
    Anantrasirichai, Noppin
    ;
    Janchitrapongvej, Kanok
    ;
    Wakabayashi, Toshio
    This paper presents a novel multiband microstrip-fed right angle slot antenna design technique for multiple independent frequency bands. The new technique uses various slot sizes at various appropriate positions. We first propose a tri-band slot antenna consisting of three right angle slots. Then, a quad-band slot antenna is developed with four right angle slots which achieves slant ±45° linear polarization, omnidirectional pattern coverage, good antenna gain, and acceptable impedance bandwidths over all the operating frequency range. Moreover, an opencircuited tuning stub is introduced to achieve good impedance matching. Both proposed antennas are designed on a ground plane of RT/duroid 5880 substrate with a thickness of 1.575 mm. The real measurable results show that the desired frequencies used in wireless communication systems, namely, WLAN and WiMax, are efficiently achieved. © 2009 ETRI.