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 (JP)
Application Number:
PCT/JP2014/083430
Publication Date:
June 23, 2016
Filing Date:
December 17, 2014
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01Q13/08; H01Q1/36
Foreign References:
| US5241321A | 1993-08-31 | |||
| JPH08172313A | 1996-07-02 | |||
| US7486238B2 | 2009-02-03 | |||
| US20060267845A1 | 2006-11-30 |
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P. C. (JP)
Patent business corporation Isono international patent trademark office (JP)
Patent business corporation Isono international patent trademark office (JP)
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