DK1658681T3 - Apparat til detektion af nærhed - Google Patents

Apparat til detektion af nærhed

Info

Publication number
DK1658681T3
DK1658681T3 DK04768125T DK04768125T DK1658681T3 DK 1658681 T3 DK1658681 T3 DK 1658681T3 DK 04768125 T DK04768125 T DK 04768125T DK 04768125 T DK04768125 T DK 04768125T DK 1658681 T3 DK1658681 T3 DK 1658681T3
Authority
DK
Denmark
Prior art keywords
receiver
radio frequency
signals
radio
frequency receiver
Prior art date
Application number
DK04768125T
Other languages
Danish (da)
English (en)
Inventor
Tony Richards
Steve Fitz
Original Assignee
Plextek 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 Plextek Ltd filed Critical Plextek Ltd
Application granted granted Critical
Publication of DK1658681T3 publication Critical patent/DK1658681T3/da

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H04B5/26—Inductive coupling using coils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
    • G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0822—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection according to predefined selection scheme

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Near-Field Transmission Systems (AREA)
  • Circuits Of Receivers In General (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
DK04768125T 2003-08-19 2004-08-19 Apparat til detektion af nærhed DK1658681T3 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0319518.7A GB0319518D0 (en) 2003-08-19 2003-08-19 Location monitoring apparatus
PCT/GB2004/003566 WO2005020449A2 (en) 2003-08-19 2004-08-19 Proximity detecting apparatus

Publications (1)

Publication Number Publication Date
DK1658681T3 true DK1658681T3 (da) 2007-10-08

Family

ID=28052812

Family Applications (1)

Application Number Title Priority Date Filing Date
DK04768125T DK1658681T3 (da) 2003-08-19 2004-08-19 Apparat til detektion af nærhed

Country Status (7)

Country Link
US (1) US20070188375A1 (de)
EP (1) EP1658681B1 (de)
AT (1) ATE364934T1 (de)
DE (1) DE602004007013T2 (de)
DK (1) DK1658681T3 (de)
GB (1) GB0319518D0 (de)
WO (1) WO2005020449A2 (de)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2428342B (en) * 2005-07-12 2007-05-23 Robotics Ltd Const Proximity sensing
US8792826B2 (en) * 2006-04-03 2014-07-29 Eckey Corporation Methods for determining proximity between radio frequency devices and controlling switches
US7479871B2 (en) * 2006-06-21 2009-01-20 Mednovus, Inc. Radio frequency warning system for ferromagnetic threats
KR100790084B1 (ko) * 2006-08-08 2008-01-02 삼성전자주식회사 블루투스 단말의 거리 측정 방법 및 장치
US9563576B1 (en) * 2006-08-31 2017-02-07 Daniel J. Horon Area-limited software utility
US9774086B2 (en) * 2007-03-02 2017-09-26 Qualcomm Incorporated Wireless power apparatus and methods
US8270905B1 (en) * 2007-10-02 2012-09-18 Plantroncis, Inc. Near-far sensing using frequency swept RSSI
US8417296B2 (en) * 2008-06-05 2013-04-09 Apple Inc. Electronic device with proximity-based radio power control
US8432322B2 (en) 2009-07-17 2013-04-30 Apple Inc. Electronic devices with capacitive proximity sensors for proximity-based radio-frequency power control
US8466839B2 (en) * 2009-07-17 2013-06-18 Apple Inc. Electronic devices with parasitic antenna resonating elements that reduce near field radiation
US8781420B2 (en) 2010-04-13 2014-07-15 Apple Inc. Adjustable wireless circuitry with antenna-based proximity detector
US8577289B2 (en) 2011-02-17 2013-11-05 Apple Inc. Antenna with integrated proximity sensor for proximity-based radio-frequency power control
US9093745B2 (en) 2012-05-10 2015-07-28 Apple Inc. Antenna and proximity sensor structures having printed circuit and dielectric carrier layers
US9300342B2 (en) 2013-04-18 2016-03-29 Apple Inc. Wireless device with dynamically adjusted maximum transmit powers
US9379445B2 (en) 2014-02-14 2016-06-28 Apple Inc. Electronic device with satellite navigation system slot antennas
US9398456B2 (en) 2014-03-07 2016-07-19 Apple Inc. Electronic device with accessory-based transmit power control
US9583838B2 (en) 2014-03-20 2017-02-28 Apple Inc. Electronic device with indirectly fed slot antennas
US9559425B2 (en) 2014-03-20 2017-01-31 Apple Inc. Electronic device with slot antenna and proximity sensor
US9728858B2 (en) 2014-04-24 2017-08-08 Apple Inc. Electronic devices with hybrid antennas
US9791490B2 (en) 2014-06-09 2017-10-17 Apple Inc. Electronic device having coupler for tapping antenna signals
US9444425B2 (en) 2014-06-20 2016-09-13 Apple Inc. Electronic device with adjustable wireless circuitry
WO2016084667A1 (ja) * 2014-11-25 2016-06-02 シャープ株式会社 通信装置、表示装置及び通信システム
US10218052B2 (en) 2015-05-12 2019-02-26 Apple Inc. Electronic device with tunable hybrid antennas
CA3006483A1 (en) * 2015-11-25 2017-06-01 VHS IP Pty Ltd Worksite safety device using lidar
US10490881B2 (en) 2016-03-10 2019-11-26 Apple Inc. Tuning circuits for hybrid electronic device antennas
JP6771955B2 (ja) * 2016-06-06 2020-10-21 キヤノン株式会社 通信装置及びその制御方法、並びにプログラム
US10290946B2 (en) 2016-09-23 2019-05-14 Apple Inc. Hybrid electronic device antennas having parasitic resonating elements
JP6690609B2 (ja) * 2017-04-06 2020-04-28 株式会社村田製作所 磁界発生回路

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1257692A (de) * 1969-07-28 1971-12-22
CA1050140A (en) * 1975-12-19 1979-03-06 National Research Council Of Canada Vlf radio position location system
US4147973A (en) * 1976-12-20 1979-04-03 Weber Harold J Frequency dependent amplitude modulated translator apparatus
US4396918A (en) * 1981-03-06 1983-08-02 The United States Of America As Represented By The Administrator Of The National Aeronautics & Space Administration Low-frequency radio navigation system
DE3719179C1 (en) * 1987-06-09 1988-12-15 Goetting Kg Arrangement for determining the separation between vehicles moving one behind the other
US5218344A (en) * 1991-07-31 1993-06-08 Ricketts James G Method and system for monitoring personnel
US5357253A (en) * 1993-04-02 1994-10-18 Earth Sounding International System and method for earth probing with deep subsurface penetration using low frequency electromagnetic signals
FR2725036A1 (fr) * 1994-09-22 1996-03-29 Oyo Corp Emetteur pour systeme de mesure de tomographie electromagnetique et procede de mise en oeuvre
US5714932A (en) * 1996-02-27 1998-02-03 Radtronics, Inc. Radio frequency security system with direction and distance locator
GB9605335D0 (en) * 1996-03-13 1996-05-15 Central Research Lab Ltd Data communication system
US6134420A (en) * 1996-11-01 2000-10-17 Plantronics, Inc. Vector measuring aerial arrays for magnetic induction communication systems
GB2335323B (en) * 1998-03-14 2002-11-27 Motorola Ltd Distance measuring apparatus
US6269257B1 (en) * 1999-01-21 2001-07-31 Agere Systems Guardian Corp. Adaptive paging signal in cordless telephone
US6396438B1 (en) * 1999-09-24 2002-05-28 Slc Technologies System and method for locating radio frequency identification tags using three-phase antenna
FR2812481B1 (fr) * 2000-07-31 2002-12-13 Commissariat Energie Atomique Systeme de localisation a courte distance

Also Published As

Publication number Publication date
WO2005020449A3 (en) 2005-04-21
GB0319518D0 (en) 2003-09-17
DE602004007013D1 (de) 2007-07-26
EP1658681A2 (de) 2006-05-24
ATE364934T1 (de) 2007-07-15
EP1658681B1 (de) 2007-06-13
WO2005020449A2 (en) 2005-03-03
DE602004007013T2 (de) 2008-02-14
US20070188375A1 (en) 2007-08-16

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