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Title:
POLARIZED WAVE SWITCHING AND DIRECTIONALITY-VARIABLE ANTENNA
Document Type and Number:
WIPO Patent Application WO/2007/119316
Kind Code:
A1
Abstract:
A polarized wave switching and directionality-variable antenna is provided with a dielectric substrate (11), a radiation conductive plate (12) formed on a front surface of the dielectric substrate, and a grounded conductive plate (14) formed on a back surface of the dielectric substrate. At least one directionality switching element and at least two polarized wave switching elements are provided in the grounded conductive plate (14). The directionality switching element has a first slot defined by cutting off the grounded conductive plate (14) in a loop shape and at least two directionality switches (22a-22d). The polarized wave switching element has a first slot defined by cutting off the grounded conductive plate (14) in a loop shape and at least one of the polarized wave switches (23a-23d). Control of the directionality switches (22a-22d) can achieve switching the maximum gain direction of the directionality of the antenna while that of the polarized wave switches (23a-23d) can achieve switching rotational directions of a circular polarized wave emitted from the antenna.

Inventors:
MATSUSHITA AKIO
FUJISHIMA TOMOYASU
Application Number:
PCT/JP2007/054517
Publication Date:
October 25, 2007
Filing Date:
March 08, 2007
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
MATSUSHITA AKIO
FUJISHIMA TOMOYASU
International Classes:
H01Q3/44; H01Q13/08; H01Q15/24; H01Q21/24
Domestic Patent References:
WO2005062421A12005-07-07
WO2006004156A12006-01-12
Foreign References:
JP2905747B21999-06-14
JP2005159401A2005-06-16
JPH09307350A1997-11-28
JPH01191282A1989-08-01
JP2006005679A2006-01-05
JP2003110322A2003-04-11
Other References:
FUJISHIMA T.: "Secchi Dotai Keitai Seigyo Antenna no Kaihatsu (Reconfigurable Antennas by Controlling the Topology of Circuits on a Ground Plane)", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS ZENKOKU TAIKAI - COMMUNICATIONS SOCIETY 1-B-1-140, 2004, pages 140, XP003018803
Attorney, Agent or Firm:
OKUDA, Seiji (10th FloorOsaka Securities Exchange Bldg.,8-16, Kitahama 1-chome, Chuo-ku,Osaka-sh, Osaka 41, JP)
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