JP4260660B2 - 可変指向性アンテナ及びこれを用いた受信システム - Google Patents

可変指向性アンテナ及びこれを用いた受信システム Download PDF

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Publication number
JP4260660B2
JP4260660B2 JP2004074448A JP2004074448A JP4260660B2 JP 4260660 B2 JP4260660 B2 JP 4260660B2 JP 2004074448 A JP2004074448 A JP 2004074448A JP 2004074448 A JP2004074448 A JP 2004074448A JP 4260660 B2 JP4260660 B2 JP 4260660B2
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Japan
Prior art keywords
antenna
directivity
signal
state
antennas
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Expired - Fee Related
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JP2004074448A
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Japanese (ja)
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JP2005268897A5 (enExample
JP2005268897A (ja
Inventor
敏明 城阪
敏夫 藤田
清隆 楯川
栄二 渋谷
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Ｄｘアンテナ株式会社
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Priority to JP2004074448A priority Critical patent/JP4260660B2/ja
Priority to US10/977,441 priority patent/US6914558B1/en
Publication of JP2005268897A publication Critical patent/JP2005268897A/ja
Publication of JP2005268897A5 publication Critical patent/JP2005268897A5/ja
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/22—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation in accordance with variation of frequency of radiated wave
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
JP2004074448A 2004-03-16 2004-03-16 可変指向性アンテナ及びこれを用いた受信システム Expired - Fee Related JP4260660B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2004074448A JP4260660B2 (ja) 2004-03-16 2004-03-16 可変指向性アンテナ及びこれを用いた受信システム
US10/977,441 US6914558B1 (en) 2004-03-16 2004-10-29 Variable directivity antenna apparatus and receiver system using such antenna apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004074448A JP4260660B2 (ja) 2004-03-16 2004-03-16 可変指向性アンテナ及びこれを用いた受信システム

Publications (3)

Publication Number Publication Date
JP2005268897A JP2005268897A (ja) 2005-09-29
JP2005268897A5 JP2005268897A5 (enExample) 2007-04-19
JP4260660B2 true JP4260660B2 (ja) 2009-04-30

Family

ID=34698011

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004074448A Expired - Fee Related JP4260660B2 (ja) 2004-03-16 2004-03-16 可変指向性アンテナ及びこれを用いた受信システム

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US (1) US6914558B1 (enExample)
JP (1) JP4260660B2 (enExample)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7116281B2 (en) * 2004-05-26 2006-10-03 Symbol Technologies, Inc. Universal dipole with adjustable length antenna elements
JP4165463B2 (ja) * 2004-06-28 2008-10-15 船井電機株式会社 ディジタルテレビジョン放送信号受信装置
JP4502790B2 (ja) * 2004-11-26 2010-07-14 Ｄｘアンテナ株式会社 放射器および放射器を備えるアンテナ
US7941091B1 (en) * 2006-06-19 2011-05-10 Rf Magic, Inc. Signal distribution system employing a multi-stage signal combiner network
JP4879726B2 (ja) * 2006-12-28 2012-02-22 Ｄｘアンテナ株式会社 アンテナ装置
JP5014905B2 (ja) * 2007-07-12 2012-08-29 Ｄｘアンテナ株式会社 可変指向性アンテナ装置
JP4943280B2 (ja) * 2007-09-20 2012-05-30 Ｄｘアンテナ株式会社 マルチビームアンテナ
EP2724545B1 (en) * 2011-06-27 2019-03-06 Trilithic, Inc. Method for detecting leakage in digitally modulated systems
US9520052B2 (en) * 2015-04-15 2016-12-13 Innovative Control Systems, Inc. Security tag system with improved range consistency
CN106921044B (zh) * 2017-01-22 2020-04-21 Oppo广东移动通信有限公司 天线装置和电子装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3806930A (en) * 1969-12-23 1974-04-23 Siemens Ag Method and apparatus for electronically controlling the pattern of a phased array antenna
JPS6338574Y2 (enExample) 1980-11-10 1988-10-12
EP0700116A3 (en) * 1994-08-29 1998-01-07 Atr Optical And Radio Communications Research Laboratories Apparatus and method for controlling array antenna comprising a plurality of antenna elements with improved incoming beam tracking
US6809691B2 (en) * 2002-04-05 2004-10-26 Matsushita Electric Industrial Co., Ltd. Directivity controllable antenna and antenna unit using the same
US6933907B2 (en) * 2003-04-02 2005-08-23 Dx Antenna Company, Limited Variable directivity antenna and variable directivity antenna system using such antennas

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Publication number Publication date
US6914558B1 (en) 2005-07-05
JP2005268897A (ja) 2005-09-29

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