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    A dual-band dual-feed switched-beam patch antenna for WLAN application
    (2008-01-01)
    Tagapanij, Jukkrit
    ;
    Sooksumrarn, Pobsook
    ;
    Tantisopharak, Tanawut
    ;
    Janin, Suwan
    ;
    Krairiksh, Monai
    Due to the demand of dual-band modern wireless communications, this paper presents a dual-band patch antenna for IEEE802.11 a and g wireless local area network (WLAN) system. The antenna has bidirectional patterns that can be switched by an RF switch to select the feeding probe positions. The 2.4 GHz and 5.2 GHz patches are stacked on a ground plane and are matched to the RF switch by open stubs. Analysis and design are illustrated and throughput improvement is demonstrated in an indoor environment. Copyright © 2008 The Institute of Electronics, Information and Communication Engineers.
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    Practical consideration of dual-feed switched-beam patch antennas in a phased array design
    (2007-12-01)
    Tagapanij, Jukkrit
    ;
    Krairiksh, Monai
    This paper presents mutual coupling between dualfeed switched-beam patch antennas that affects input impedances and radiation patterns. Analysis is carried out by using CST electromagnetic simulator to provide a single element that has good matching and radiation patterns. Then, mutual coupling between side-by-side and parallel-in-echelon configurations at various distances are plotted to know mutual impedance between elements and radiation patterns. The resultant radiation patterns of a phased array of switched-beam elements have shallow null that must be compensated in practical use.