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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/106171

    Title: A Novel Quadri-Polarization-Agile Microstrip Antenna with Polarization Synthesizing Feeding Network
    Authors: Yu-Jen Chi;Fu-Chiarng Chen
    Keywords: Circular polarization;Diversity antenna;Linear polarization;Polarization diversity;Quadri-polarization;Sequential rotation
    Date: 2015/03/17
    Issue Date: 2016-04-22 13:22:56 (UTC+8)
    Publisher: Cambridge University Press
    Abstract: This paper proposes planar antennas with quadri-polarization diversity using a pair of orthogonal linear polarizations and a pair of orthogonal circular polarizations (CP). A novel feeding network with four input ports and four output ports is presented, allowing antenna polarization diversity by selecting different input ports, which can generate right-handed CP, left-handed CP, horizontal linear polarization, and vertical linear polarization. The first design uses two square patch resonators to synthesize the four polarizations; the second design comprises four circularly polarized patches to synthesize the four polarizations with an improved axial-ratio (the ratio of orthogonal components of an E-field) bandwidth. The proposed designs do not require for embedding PIN diodes and DC-biasing circuits, making them suitable for use in higher-frequency applications where using lump elements would be difficult. The novel antennas provide potential polarization diversity features which can be used for many applications. Details of the antenna design are shown, and the measurement and simulation results are also provided to validate the proposed concept.
    Relation: International Journal of Microwave and Wireless Technologies 8(2), p.385-394
    DOI: 10.1017/S1759078715000227
    Appears in Collections:[Graduate Institute & Department of Electrical Engineering] Journal Article

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