NL8302053A - Spoelopbouw voorzien van fluxrichtende middelen. - Google Patents

Spoelopbouw voorzien van fluxrichtende middelen. Download PDF

Info

Publication number
NL8302053A
NL8302053A NL8302053A NL8302053A NL8302053A NL 8302053 A NL8302053 A NL 8302053A NL 8302053 A NL8302053 A NL 8302053A NL 8302053 A NL8302053 A NL 8302053A NL 8302053 A NL8302053 A NL 8302053A
Authority
NL
Netherlands
Prior art keywords
coil
strips
flux
construction according
plane
Prior art date
Application number
NL8302053A
Other languages
English (en)
Dutch (nl)
Original Assignee
Sensormatic Electronics Corp
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 Sensormatic Electronics Corp filed Critical Sensormatic Electronics Corp
Publication of NL8302053A publication Critical patent/NL8302053A/nl

Links

Classifications

    • 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
    • H01Q7/06—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 core of ferromagnetic material

Landscapes

  • Near-Field Transmission Systems (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Burglar Alarm Systems (AREA)
  • Magnetic Treatment Devices (AREA)
  • Coils Or Transformers For Communication (AREA)
NL8302053A 1982-06-10 1983-06-09 Spoelopbouw voorzien van fluxrichtende middelen. NL8302053A (nl)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US38688682 1982-06-10
US06/386,886 US4486731A (en) 1982-06-10 1982-06-10 Coil assembly with flux directing means

Publications (1)

Publication Number Publication Date
NL8302053A true NL8302053A (nl) 1984-01-02

Family

ID=23527479

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8302053A NL8302053A (nl) 1982-06-10 1983-06-09 Spoelopbouw voorzien van fluxrichtende middelen.

Country Status (13)

Country Link
US (1) US4486731A (it)
JP (1) JPS593905A (it)
BE (1) BE897015A (it)
BR (1) BR8303072A (it)
CA (1) CA1210828A (it)
DE (1) DE3321132A1 (it)
ES (1) ES8405191A1 (it)
FR (1) FR2528644B1 (it)
GB (1) GB2121652B (it)
IT (2) IT8309448A1 (it)
MX (1) MX152757A (it)
NL (1) NL8302053A (it)
SE (1) SE8303257L (it)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4659990A (en) * 1983-05-10 1987-04-21 Magnaflux Corporation Eddy current test system including a member of high permeability material effective to concentrate flux in a very small region of a part
US4745401A (en) * 1985-09-09 1988-05-17 Minnesota Mining And Manufacturing Company RF reactivatable marker for electronic article surveillance system
US4736196A (en) * 1986-11-18 1988-04-05 Cost-Effective Monitoring Systems, Co. Electronic monitoring system
JPH03503467A (ja) * 1988-02-04 1991-08-01 ユニスキャン　リミティド 磁界集中装置
CN1185865A (zh) * 1995-05-30 1998-06-24 传感电子公司 用于改进询问场分布的eas系统天线结构
TW531976B (en) * 2001-01-11 2003-05-11 Hanex Co Ltd Communication apparatus and installing structure, manufacturing method and communication method
DE10149126A1 (de) * 2001-10-05 2003-04-10 Flexchip Ag Einrichtung zum Abschirmen eines Transponders, Verfahren zum Herstellen einer entsprechenden Abschirmung, sowie Transponder mit Abschirmung

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2329634A (en) * 1939-10-06 1943-09-14 Jr Eugene F Mcdonald Radio apparatus
GB552778A (en) * 1940-11-29 1943-04-23 British Thomson Houston Co Ltd Improvements in and relating to electric induction apparatus
US2669528A (en) * 1950-05-11 1954-02-16 Avco Mfg Corp Process of increasing the inductance of a loop antenna
GB755756A (en) * 1953-03-17 1956-08-29 Philips Nv Improvements in or relating to radio receivers
GB872050A (en) * 1957-01-19 1961-07-05 Emi Ltd Improvements in or relating to inductances suitable for use in electrical circuits having conductors adhering to insulating supports
NL248852A (it) * 1959-02-27
DE1282744B (de) * 1965-07-02 1968-11-14 Csf Empfangs-Rahmenantenne
US3448440A (en) * 1965-12-17 1969-06-03 Wiegand Electronics Co Inc Interceptor transformer proximity key
GB1128885A (en) * 1966-02-24 1968-10-02 Matsushita Electric Ind Co Ltd Improvements in and relating to high frequency apparatus
US3778836A (en) * 1966-12-27 1973-12-11 T Tanaka Magnetic antenna having a block or circuit components therein
US3521280A (en) * 1969-01-16 1970-07-21 Gen Res Corp Coded labels
US3624311A (en) * 1969-01-16 1971-11-30 Advance Data Systems Corp Card handler having rotatable magnetic head and card-clamping means carried by housing assembly
GB1307985A (en) * 1969-04-18 1973-02-21 Sybrook Electronics Ltd Inductive transducers
US3823403A (en) * 1971-06-09 1974-07-09 Univ Ohio State Res Found Multiturn loop antenna
JPS54128653A (en) * 1978-03-30 1979-10-05 Nippon Gakki Seizo Kk Antenna unit for receiver

Also Published As

Publication number Publication date
DE3321132C2 (it) 1993-01-28
ES523112A0 (es) 1984-05-16
BR8303072A (pt) 1984-01-31
IT8309448A0 (it) 1983-06-09
FR2528644A1 (fr) 1983-12-16
GB2121652B (en) 1986-03-26
IT1198620B (it) 1988-12-21
CA1210828A (en) 1986-09-02
MX152757A (es) 1985-11-07
SE8303257L (sv) 1983-12-11
DE3321132A1 (de) 1983-12-15
GB8313752D0 (en) 1983-06-22
FR2528644B1 (fr) 1987-11-20
ES8405191A1 (es) 1984-05-16
SE8303257D0 (sv) 1983-06-09
IT8309448A1 (it) 1984-12-09
GB2121652A (en) 1983-12-21
BE897015A (fr) 1983-10-03
US4486731A (en) 1984-12-04
JPS593905A (ja) 1984-01-10

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Legal Events

Date Code Title Description
A85 Still pending on 85-01-01
BV The patent application has lapsed