Title:
A LOW COUPLING FULL-DUPLEX MIMO ANTENNA ARRAY WITH COUPLED SIGNAL CANCELLING
Document Type and Number:
WIPO Patent Application WO/2017/219490
Kind Code:
A1
Abstract:
A full-duplex 2x2 multiple-input multiple-output (MIMO) antenna array is provided. An antenna reflector defining an x-y plane provides a plurality of antenna elements on the reflector. The linear polarization elements of the antenna elements are arrange in orthogonal polarizations for each transmit and receive pair. The elements are aligned in the same direction for half the orthogonal pair. A pair of elements are aligned along an axis to provide two coupled phase offset signals at a third element. The third element is collinear to the element of the first element defining a line of symmetry and parallel the direction of the element of the second element. The antenna array provides improved isolation between orthogonal ports and between transmit and receive ports by providing coupled signal cancelling between ports. This technique also increases boresight radiated pattern gain, as an additional benefit.
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Inventors:
WATSON PAUL ROBERT (CA)
Application Number:
PCT/CN2016/097048
Publication Date:
December 28, 2017
Filing Date:
August 27, 2016
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H01Q21/26
Domestic Patent References:
| WO2012008946A1 | 2012-01-19 |
Foreign References:
| US20140368395A1 | 2014-12-18 | |||
| US20150188240A1 | 2015-07-02 | |||
| CN204375960U | 2015-06-03 | |||
| US20110148730A1 | 2011-06-23 | |||
| US8837332B2 | 2014-09-16 |
Other References:
TSAKALAKI ELPINIKI ET AL.: "the 8th European Conference on Antennas and Propagation (EUCAP 2014", 6 April 2014, EUROPEAN ASSOCIATION ON ANTENNAS AND PROPAGATION, article "A 2-oder MIMO full-duplex antenna system", pages: 2546 - 2550
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