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Access type: UnknownSubject: search.filters.subject.Pattern reconfigurable antenna

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    Phased array of switched beam elements and application
    (2017-01-17)
    Kittiyanpunya, Chainarong
    ;
    Krairiksh, Monai
    This paper presents a two-element phased array antenna. The phase shifter for each element has one bit and each element has four beam directions. The suitable distance between elements provides side lobe level of less than -10 dB and gain higher than 6.3 dBi. With this simple configuration, this array antenna is useful in modern wireless communications and sensing applications.
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    Design of pattern reconfigurable printed Yagi-Uda antenna
    (2016-01-01)
    Kittiyanpunya, Chainarong
    ;
    Krairiksh, Monai
    This paper presents a pattern reconfigurable Yagi-Uda antenna on an FR-4 printed circuit board (PCB) for 2.435.2.465 GHzfrequency short-range radiocommunication devices. To realize the antenna, pin diodes are attached onto the antenna's driven elements and parasitic elements. The direction of the beam is shifted by alternating the pin diodes status between ON and OFF to induce a quad-directional operation so that E-plane maximum beams are formed in the directions of 135°, 45°, 310° and 225° (i.e. regions 1, 2, 3, 4), respectively. A series of simulations are performed on four parameters: microstrip-to-CPS (coplanar stripline), inter-parasitic spacing, parasitic length, and modes of parasitic elements (i.e. director/reflector) to determine the optimal antenna design. A prototype is fabricated based on the optimal simulation results. The experiments showed very good agreement between the simulation and measured results with regard to the reflection coefficients, radiation patterns and gains for all four beams. key words: pattern
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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.