CA2068521A1 - End fed flat antenna - Google Patents

End fed flat antenna

Info

Publication number
CA2068521A1
CA2068521A1 CA2068521A CA2068521A CA2068521A1 CA 2068521 A1 CA2068521 A1 CA 2068521A1 CA 2068521 A CA2068521 A CA 2068521A CA 2068521 A CA2068521 A CA 2068521A CA 2068521 A1 CA2068521 A1 CA 2068521A1
Authority
CA
Canada
Prior art keywords
adjacent
opposite
quarter wavelength
antenna
flat antenna
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2068521A
Other languages
French (fr)
Other versions
CA2068521C (en
Inventor
Paul A. Nysen
Jon L. Nagel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xcyte Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2068521A1 publication Critical patent/CA2068521A1/en
Application granted granted Critical
Publication of CA2068521C publication Critical patent/CA2068521C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/0672—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with resonating marks
    • G06K19/0675—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with resonating marks the resonating marks being of the surface acoustic wave [SAW] kind
    • 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
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G06K7/083—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive
    • G06K7/086—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive sensing passive circuit, e.g. resonant circuit transponders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Support Of Aerials (AREA)

Abstract

A planar dipole antenna is arranged on a non-conductive substrate having an exposed, planar surface. The antenna includes a first quarter wavelength element having a first end and an opposite second end and a second quarter wavelength element having a third end and an opposite fourth end. The first, second, third and fourth ends, respectively, are arranged on a common straight line with the second and third ends adjacent to each other. A third quarter wavelength element, having a fifth end and an opposite sixth end, is arranged adjacent to the first element with its fifth end adjacent to the first end of the first element and its sixth end both adjacent to and physically connected with the third end of the second element. A signal source or sink is coupled to the first end of the first element and the fifth end of the third element, respectively, for providing electrical energy to, and/or receiving electrical energy from the antenna.
CA002068521A 1989-11-13 1990-11-13 End fed flat antenna Expired - Lifetime CA2068521C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US43423389A 1989-11-13 1989-11-13
US434,233 1989-11-13
PCT/US1990/006614 WO1991007785A1 (en) 1989-11-13 1990-11-13 End fed flat antenna

Publications (2)

Publication Number Publication Date
CA2068521A1 true CA2068521A1 (en) 1991-05-14
CA2068521C CA2068521C (en) 2000-01-18

Family

ID=23723388

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002068521A Expired - Lifetime CA2068521C (en) 1989-11-13 1990-11-13 End fed flat antenna

Country Status (3)

Country Link
EP (1) EP0514378A4 (en)
CA (1) CA2068521C (en)
WO (1) WO1991007785A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL38853C (en) * 1933-11-21 1900-01-01
US3689929A (en) * 1970-11-23 1972-09-05 Howard B Moody Antenna structure
US4138681A (en) * 1977-08-29 1979-02-06 Motorola, Inc. Portable radio antenna
US4259673A (en) * 1979-06-05 1981-03-31 Harold Guretzky Stub matched antenna and method of feeding same
JPS56160102A (en) * 1980-05-13 1981-12-09 Koki Tanaka Folded antenna using coaxial line
US4642640A (en) * 1983-04-25 1987-02-10 Sensormatic Electronics Corporation Signal receptor-reradiator and surveillance tag using the same
US4737789A (en) * 1986-12-02 1988-04-12 X Cyte, Inc. Inductive antenna coupling for a surface acoustic wave transponder
US4800392A (en) * 1987-01-08 1989-01-24 Motorola, Inc. Integral laminar antenna and radio housing

Also Published As

Publication number Publication date
CA2068521C (en) 2000-01-18
EP0514378A1 (en) 1992-11-25
WO1991007785A1 (en) 1991-05-30
EP0514378A4 (en) 1993-02-24

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKEC Expiry (correction)

Effective date: 20121202