Extended cavity model analysis of stacked microstrip ring antennas

    Authors

    J. GomezTagle;C. G. Christodoulou

    Comments

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    Abbreviated Journal Title

    IEEE Trans. Antennas Propag.

    Keywords

    microstrip antennas; HIGHER-ORDER MODES; INPUT IMPEDANCE; DISK; Engineering, Electrical & Electronic; Telecommunications

    Abstract

    Microstrip ring antennas deserve special attention because they can yield a larger bandwidth compared to other conventional patches and outstanding gain-bandwidth characteristics that renders them useful for applications that require reduced size and good radiation efficiency, like the area of mobile communications. In this paper, the stacked microstrip ring antennas for dual-frequency behavior and improved bandwidth are studied and analyzed. The cavity model for single microstrip antennas is extended with some modifications for the stacked geometry to account for coupling between the upper and lower cavities, fringe fields, dispersion effects, and effective loss tangent of the dielectric material. Green's functions are used to allow for modal analysis and closed-form solutions. Results far radiation patterns and input impedance predicted through this simple model are compared with experimental data.

    Journal Title

    Ieee Transactions on Antennas and Propagation

    Volume

    45

    Issue/Number

    11

    Publication Date

    1-1-1997

    Document Type

    Article

    Language

    English

    First Page

    1626

    Last Page

    1635

    WOS Identifier

    WOS:A1997YE07900008

    ISSN

    0018-926X

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