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Author: search.filters.author.Sooksumrarn, P.

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    Compact pattern reconfigurable Yagi patch antenna
    (2011-12-01)
    Sooksumrarn, P.
    ;
    Krairiksh, M.
    With the increasing requirement to mitigate the problems of interference between users and electronic jamming, a reconfigurable pattern antenna is one of the solutions to resolve the problems. To switch radiation pattern in azimuth plane around a flat antenna, a Yagi patch antenna operated at higher mode is proposed. A bidirectional pattern using higher mode square patch is used as a driven element and electromagnetic-coupling with a parasitic element serving as a reflector provides a unidirectional pattern. The radiation pattern can be switched by switching feed-probe positions. Simulations were carried out at 2.45 GHz to find appropriate dimensions and validated by measurements. © 2011 Engineers Australia.
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    Dual-band mobile angle of arrival estimator
    (2010-12-01)
    Sooksumrarn, P.
    ;
    Krairiksh, M.
    A simple dual-band mobile angle of arrival (AOA) estimator is designed to operate at 2.45 and 5.2 GHz. By using dual-band phased array of switched-beam elements as a dual-band switched-beam antenna, with power detector and microcontroller, the dual-band AoA is simply estimated by comparing the ratio of the measured path gains obtained from the two beams with the greatest path gain to the ratio of the antenna patterns corresponding to the same beams. The accurate results can be obtained and it is relevant that the proposed AOA estimator is useful for initialization of dual-band mobile adaptive antenna, dual-band channel modeling, etc., in dual-band wireless communications. © 2010 IEICE Institute of Electronics Informati.