Title:
SPARSE PHASE-MODE PLANAR FEED FOR CIRCULAR ARRAYS
Document Type and Number:
WIPO Patent Application WO/2017/088319
Kind Code:
A1
Abstract:
A method and apparatus for phase-mode feeding a circular antenna array for beamsteering is provided. A Butler Matrix having M antenna-side ports and M input/output ports is coupled to beamsteering circuitry. The coupled input/output ports may include a port corresponding to a phase-mode having an order magnitude greater than one. The coupled input/output ports may include ports of three different order magnitudes of phase-mode. The Butler Matrix is coupled to M inner ports of a radial waveguide, and the antenna elements are coupled to N outer ports of the waveguide, where N>M. Where M＝4, the input/output ports correspond to a zeroth order phase-mode, plus and minus 1st order phase-modes, and a second order phase-mode. The zeroth order phase-mode may be used for beamsteering closer to the radial axis of the antenna array while the second order phase-mode may be used for beamsteering further from the radial axis.
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Inventors:
KLEMES MAREK (CA)
Application Number:
PCT/CN2016/076401
Publication Date:
June 01, 2017
Filing Date:
March 15, 2016
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H01Q19/00
Foreign References:
| US4980692A | 1990-12-25 | |||
| US4446463A | 1984-05-01 | |||
| US20140266901A1 | 2014-09-18 | |||
| US20050259019A1 | 2005-11-24 |
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