SG49628A1 - Adjustable reactance device and method - Google Patents

Adjustable reactance device and method

Info

Publication number
SG49628A1
SG49628A1 SG1996001721A SG1996001721A SG49628A1 SG 49628 A1 SG49628 A1 SG 49628A1 SG 1996001721 A SG1996001721 A SG 1996001721A SG 1996001721 A SG1996001721 A SG 1996001721A SG 49628 A1 SG49628 A1 SG 49628A1
Authority
SG
Singapore
Prior art keywords
reactance device
adjustable reactance
reactance
adjustable
discloses
Prior art date
Application number
SG1996001721A
Other languages
English (en)
Inventor
Graham Alexander Munro Murdoch
Original Assignee
Univ Western Australia
Magellan Tech Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Western Australia, Magellan Tech Pty Ltd filed Critical Univ Western Australia
Publication of SG49628A1 publication Critical patent/SG49628A1/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10346—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the far field type, e.g. HF types or dipoles
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10336—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the near field type, inductive coil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/005—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with variable reactance for tuning the antenna
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H5/00—One-port networks comprising only passive electrical elements as network components
    • H03H5/02—One-port networks comprising only passive electrical elements as network components without voltage- or current-dependent elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/24—Continuous tuning of more than one resonant circuit simultaneously, the circuits being tuned to substantially the same frequency, e.g. for single-knob tuning

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Theoretical Computer Science (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Networks Using Active Elements (AREA)
  • Near-Field Transmission Systems (AREA)
  • Details Of Aerials (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Filters And Equalizers (AREA)
  • Control Of Electrical Variables (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
SG1996001721A 1987-12-10 1988-12-12 Adjustable reactance device and method SG49628A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPI585587 1987-12-10

Publications (1)

Publication Number Publication Date
SG49628A1 true SG49628A1 (en) 1998-06-15

Family

ID=3772638

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1996001721A SG49628A1 (en) 1987-12-10 1988-12-12 Adjustable reactance device and method

Country Status (9)

Country Link
EP (2) EP0393103B1 (fr)
JP (1) JPH03502269A (fr)
AT (2) ATE178438T1 (fr)
CA (1) CA1336341C (fr)
DE (2) DE3854051T2 (fr)
HK (1) HK1001909A1 (fr)
SG (1) SG49628A1 (fr)
WO (1) WO1989005530A1 (fr)
ZA (1) ZA889254B (fr)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0156300B1 (ko) * 1995-04-11 1998-11-16 손일호 전방향성 루프안테나
FR2733095B1 (fr) * 1995-04-11 1997-05-09 Alcatel Converters Dispositif a inductance variable et utilisation de ce dispositif pour la realisation d'une source de courant pour cellule de commutation a tension nulle
JPH08336338A (ja) * 1995-06-13 1996-12-24 Chikusanyo Denshi Gijutsu Kenkyu Kumiai 家畜等の個体識別装置
JP3528367B2 (ja) * 1995-09-30 2004-05-17 ソニーケミカル株式会社 リーダ・ライタ用アンテナ
AUPP254698A0 (en) * 1998-03-23 1998-04-23 Magellan Technology Pty Limited An interrogator for interrogating an rfid transponder
DE19951561A1 (de) * 1999-10-27 2001-05-03 Meto International Gmbh Sicherungselement für die elektronischen Artikelsicherung
DE10011500A1 (de) * 2000-03-09 2001-09-13 Abb Research Ltd Wicklung und System zur Erzeugung eines magnetischen Feldes
DE10320188A1 (de) * 2003-05-07 2004-12-02 Abb Research Ltd. Magnetfelderzeugungssystem
JP2006020207A (ja) * 2004-07-05 2006-01-19 Nec Infrontia Corp アンテナ装置
JP4553361B2 (ja) * 2005-01-17 2010-09-29 セントラルエンジニアリング株式会社 アンテナ装置、アンテナ駆動方法およびｉｄタグ読取装置
JP4634166B2 (ja) * 2005-02-03 2011-02-16 株式会社東海理化電機製作所 アンテナ装置及びそれを備えた携帯機
US7545272B2 (en) 2005-02-08 2009-06-09 Therasense, Inc. RF tag on test strips, test strip vials and boxes
JP4938016B2 (ja) * 2005-09-12 2012-05-23 マゼラン テクノロジー ピーティーワイ．エルティーディー． データを伝送するように適応された方法および装置
CA2626228C (fr) 2005-09-20 2014-03-18 Allflex Australia Pty. Limited Antenne de portail
DE102006029717A1 (de) 2006-06-28 2008-01-03 Siemens Audiologische Technik Gmbh Hörvorrichtung mit orthogonal zueinander angeordneten Spulen
DE102008008899A1 (de) * 2008-02-13 2009-08-27 Siemens Medical Instruments Pte. Ltd. Ladegerät mit homogenem Magnetfeld
ES2556269T3 (es) 2008-04-03 2016-01-14 Koninklijke Philips N.V. Sistema inalámbrico de transmisión de energía
DE102008036093A1 (de) * 2008-08-04 2010-02-11 Ralf Bux Vorrichtung zum automatischen Erkennen und/oder Lesen bzw. Speichern von Daten
JP5569011B2 (ja) * 2010-01-29 2014-08-13 大日本印刷株式会社 アンテナ部品
US9070969B2 (en) 2010-07-06 2015-06-30 Apple Inc. Tunable antenna systems
US9166279B2 (en) 2011-03-07 2015-10-20 Apple Inc. Tunable antenna system with receiver diversity
US9246221B2 (en) 2011-03-07 2016-01-26 Apple Inc. Tunable loop antennas
US9350069B2 (en) 2012-01-04 2016-05-24 Apple Inc. Antenna with switchable inductor low-band tuning
US9190712B2 (en) 2012-02-03 2015-11-17 Apple Inc. Tunable antenna system
ITMI20121049A1 (it) 2012-06-18 2013-12-19 Ab Medica Spa Gabbia per cavie da laboratorio e metodo per l¿alimentazione senza fili di un dispositivo bioelettronico impiantato in una cavia
JP6152716B2 (ja) * 2012-08-27 2017-06-28 Tdk株式会社 アンテナ装置
JPWO2015163296A1 (ja) * 2014-04-24 2017-04-20 株式会社村田製作所 ワイヤレス給電システム
US20220157512A1 (en) * 2020-11-13 2022-05-19 Cyntec Co., Ltd. Structure for forming a 3d-coil transponder

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB449240A (en) * 1933-10-23 1936-06-15 Leon Ladislas De Kramolin Method of regulating radio sets and the like
US3631534A (en) * 1969-09-05 1971-12-28 Matsushita Electric Ind Co Ltd Variable inductance device
FR2076468A5 (fr) * 1970-01-14 1971-10-15 Ancet Victor
US3689885A (en) * 1970-09-15 1972-09-05 Transitag Corp Inductively coupled passive responder and interrogator unit having multidimension electromagnetic field capabilities
US3832530A (en) * 1972-01-04 1974-08-27 Westinghouse Electric Corp Object identifying apparatus
US3990065A (en) * 1975-02-20 1976-11-02 The Magnavox Company Theft detection system
US4210860A (en) * 1978-09-15 1980-07-01 Westinghouse Electric Corp. VAR Generator with current sensitive inductance break point
US4307331A (en) * 1978-09-15 1981-12-22 Westinghouse Electric Corp. Hybrid switched-capacitor controlled-inductor static VAR generator and control apparatus
US4539558A (en) * 1981-11-24 1985-09-03 Shin International, Inc. Antitheft system
GB2121248B (en) * 1982-05-18 1986-03-05 Gen Electric Capacitive voltage dropper
US4623877A (en) * 1983-06-30 1986-11-18 Knogo Corporation Method and apparatus for detection of targets in an interrogation zone
US4634975A (en) * 1984-09-17 1987-01-06 Progressive Dynamics, Inc. Method and apparatus for producing electromagnetic surveillance fields
SE451166C (sv) * 1986-01-21 1990-12-10 Intermodulation & Safety Syst Mottagaranordning foer att detektera naervaro av en indikeringsanordning i en begraensad undersoekningszon

Also Published As

Publication number Publication date
DE3854051D1 (de) 1995-07-27
JPH03502269A (ja) 1991-05-23
DE3856320T2 (de) 1999-12-02
ZA889254B (en) 1990-08-29
CA1336341C (fr) 1995-07-18
DE3856320D1 (de) 1999-05-06
WO1989005530A1 (fr) 1989-06-15
EP0393103B1 (fr) 1995-06-21
EP0608966A2 (fr) 1994-08-03
DE3854051T2 (de) 1995-11-02
AU635198B2 (en) 1993-03-18
EP0608966A3 (fr) 1994-08-31
EP0393103A4 (en) 1992-01-15
HK1001909A1 (en) 1998-07-17
EP0393103A1 (fr) 1990-10-24
EP0608966B1 (fr) 1999-03-31
ATE124175T1 (de) 1995-07-15
ATE178438T1 (de) 1999-04-15
AU2801389A (en) 1989-07-05

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