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Patent Searching and Data


Title:
ROTATION-POLARIZED ANTENNA, TRANSMITTING AND RECEIVING MODULE, ELEVATOR MACHINE CONTROL SYSTEM AND TRANSFORMER STATION CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2016/098201
Kind Code:
A1
Abstract:
When a feeding point (3) is disposed on one flat plate configured from multiple microconductor segments (10) and has been excited at a first frequency and a second frequency different from the first frequency, this thin rotation-polarized antenna (1) for performing highly reliable and highly secure wireless communication matches the power supply circuit in both a frequency band that includes the first frequency and a frequency band that includes the second frequency. At the first frequency, the orthogonal-direction current distributions formed on the flat plate have the same amplitude and have a phase difference of 90°. At the second frequency, the mutually-orthogonal same-direction current distributions formed on the flat plate have the same amplitude and have a phase difference of 90°, and the phase of the current distribution at the first frequency and the phase of the current distribution at the second frequency are in opposite directions.

Inventors:
TAKEI Ken (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2014/083430
Publication Date:
June 23, 2016
Filing Date:
December 17, 2014
Export Citation:
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Assignee:
HITACHI, LTD. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 〒1008280, JP)
International Classes:
H01Q1/36; H01Q13/08
Foreign References:
US5241321A1993-08-31
JPH08172313A1996-07-02
US7486238B22009-02-03
US20060267845A12006-11-30
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (Hulic Toranomon Building, 1-18 Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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