A general T-stub circuit for decoupling of two dual-band antennas
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AbstractThis paper presents a novel technique for decoupling of two closely spaced dual-band antennas using T-stub circuits. A decoupling circuit consists of three T-stub elements, each of which provides the required phases and impedances in dual frequency bands independently. A set of general design formulas is derived for determining the electric parameters of required T-stubs. To validate the new decoupling technique, a pair of dual-band inverted-F antennas working in the 2.45- and 5.8-GHz bands and another pair of dual-band monopole antennas working in the 2.4- and 5.2-GHz bands with and without the decoupling circuit are designed, prototyped, and measured. The measured S-parameters correlate with the theoretical designed data very well. With the decoupling circuit, significant improvement in antenna efficiency and data throughput demonstrates that the technique is useful for wireless terminals, where dual-band multiple-input and multiple-output antennas are used.
Acceptance Date24/12/2016
All Author(s) ListJiangwei Sui, Ke-Li Wu
Journal nameIEEE Transactions on Microwave Theory and Techniques
Year2017
Month6
Volume Number65
Issue Number6
Pages2111 - 2121
ISSN0018-9480
eISSN1557-9670
LanguagesEnglish-United States

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