ARRAY ANTENNA DEVICE

WIPO Patent Application WO/2010/073429

A1

An antenna unit (2) is provided with: variable directivity antennas (11, 12, 13) each of which has a power feed antenna element and two passive antenna elements; and metal blocks (21, 22, 23).  At least one of the metal blocks is provided on each power feed antenna element at a predetermined distance, and the metal block operates as a reflector for the power feed antenna element.  Each of the passive antenna elements is provided with a switch circuit so as to switch the electrical length of the passive antenna element, and by switching the electrical length by the switch circuit, the passive antenna element operates as the reflector for the power feed antenna element included in the same variable directivity antenna wherein the passive antenna element is included.

WO/2006/120820	WIRELESS TAG COMMUNICATION SYSTEM
JP5823806	Microwave antenna system
JP3622883	Array response simulator

SHINKAI SOTARO
NOGUCHI WATARU
YURUGI HIROYUKI
NAGOSHI MASAHIKO
SHIOTSUKI AKIHIKO
TANAKA OSAMU
YAMADA TOYOSHI
ARASHIN NOBUHIKO

PCT/JP2009/004025

July 01, 2010

August 21, 2009

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PANASONIC CORP (JP)
SHINKAI SOTARO
NOGUCHI WATARU
YURUGI HIROYUKI
NAGOSHI MASAHIKO
SHIOTSUKI AKIHIKO
TANAKA OSAMU
YAMADA TOYOSHI
ARASHIN NOBUHIKO

H01Q3/26; H01Q3/44; H01Q9/40; H01Q19/28; H01Q19/32; H01Q21/06

WO2006049002A1

2006-05-11

JP2008109214A	2008-05-08
JP2008072701A	2008-03-27
JP2007013692A	2007-01-18

TANAKA, Mitsuo et al. (JP)
Mitsuo Tanaka (JP)

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