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JPS56711A - Antenna unit - Google Patents

Antenna unit

Info

Publication number
JPS56711A
JPS56711A JP7624979A JP7624979A JPS56711A JP S56711 A JPS56711 A JP S56711A JP 7624979 A JP7624979 A JP 7624979A JP 7624979 A JP7624979 A JP 7624979A JP S56711 A JPS56711 A JP S56711A
Authority
JP
Japan
Prior art keywords
frequencies
curve
capacitor
impedance
coil
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.)
Pending
Application number
JP7624979A
Other languages
Japanese (ja)
Inventor
Joji Kane
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7624979A priority Critical patent/JPS56711A/en
Priority to US06/158,132 priority patent/US4381566A/en
Priority to CA000353876A priority patent/CA1152660A/en
Priority to EP80302020A priority patent/EP0021762B1/en
Priority to DE8080302020T priority patent/DE3066820D1/en
Publication of JPS56711A publication Critical patent/JPS56711A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)

Abstract

PURPOSE:To reduce the antenna element length and to make small the size, by providing the impedance adjusting capacitor between the power feeding terminals of a pair of antenna main bodies consisting of the antenna element and the two terminal variable reactance. CONSTITUTION:The element pattern is designed so that the impedance at frequencies f1-f2-f3 of the unit of elements 10, 10' can be as curve A, and it is connected with the parallel resonant circuit consisting of the coil 11, variable capacitor 12, coil 11' and variable capacitor 12', and the resonant frequency is set to the required value to be positive reactance at frequencies f1-f2-f3, then the impedance is turned out to be the curve B. Further, when the capacitor of required value is inserted beteen the power feeding terminals 13, 13', the inductance is the curve C and tuning is made at frequency f2. Further, when the value of the capacitors 12, 12' is changed to change the resonant frequency and to change the reactive component added to the elements 10, 10', since the tuning conditions are satisfied at frequencies f1-f2-f3, the unit can be made samll in size.
JP7624979A 1979-06-14 1979-06-14 Antenna unit Pending JPS56711A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP7624979A JPS56711A (en) 1979-06-14 1979-06-14 Antenna unit
US06/158,132 US4381566A (en) 1979-06-14 1980-06-10 Electronic tuning antenna system
CA000353876A CA1152660A (en) 1979-06-14 1980-06-12 Electronic tuning antenna system
EP80302020A EP0021762B1 (en) 1979-06-14 1980-06-16 Electronic tuning antenna system
DE8080302020T DE3066820D1 (en) 1979-06-14 1980-06-16 Electronic tuning antenna system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7624979A JPS56711A (en) 1979-06-14 1979-06-14 Antenna unit

Publications (1)

Publication Number Publication Date
JPS56711A true JPS56711A (en) 1981-01-07

Family

ID=13599910

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7624979A Pending JPS56711A (en) 1979-06-14 1979-06-14 Antenna unit

Country Status (1)

Country Link
JP (1) JPS56711A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002019465A1 (en) * 2000-08-31 2002-03-07 Matsushita Electric Industrial Co., Ltd. Built-in antenna for radio communication terminal
WO2004025781A1 (en) * 2002-09-13 2004-03-25 The Furukawa Electric Co., Ltd Loop antenna
JP2005117608A (en) * 2003-09-18 2005-04-28 Dx Antenna Co Ltd Multiple frequency band antenna
JP2005260603A (en) * 2004-03-11 2005-09-22 Maspro Denkoh Corp Antenna system
JP2005277954A (en) * 2004-03-25 2005-10-06 Maspro Denkoh Corp Yagi-uda antenna equipment
JP2006054505A (en) * 2004-08-09 2006-02-23 Maspro Denkoh Corp Yagi-uda antenna assembly
JP2006217000A (en) * 2005-02-01 2006-08-17 Fujitsu Ltd Meander line antenna
JP2006340186A (en) * 2005-06-03 2006-12-14 Yoshifusa Yamada Normal mode helical antenna, and manufacturing method of normal mode helical antenna
JP2007070112A (en) * 2005-08-08 2007-03-22 Nippon Sheet Glass Co Ltd Rack plate with antenna for article control rack, and article control rack using the rack plate with the antenna
JP2009218878A (en) * 2008-03-11 2009-09-24 Taiyo Yuden Co Ltd Antenna, circuit board, circuit module, and electronic device
WO2011111142A1 (en) * 2010-03-12 2011-09-15 パナソニック株式会社 Folded-dipole antenna

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002019465A1 (en) * 2000-08-31 2002-03-07 Matsushita Electric Industrial Co., Ltd. Built-in antenna for radio communication terminal
US6987485B2 (en) 2000-08-31 2006-01-17 Matsushita Electric Industrial Co., Ltd. Built-in antenna for radio communication terminal
WO2004025781A1 (en) * 2002-09-13 2004-03-25 The Furukawa Electric Co., Ltd Loop antenna
JP2005117608A (en) * 2003-09-18 2005-04-28 Dx Antenna Co Ltd Multiple frequency band antenna
JP2005260603A (en) * 2004-03-11 2005-09-22 Maspro Denkoh Corp Antenna system
JP2005277954A (en) * 2004-03-25 2005-10-06 Maspro Denkoh Corp Yagi-uda antenna equipment
JP2006054505A (en) * 2004-08-09 2006-02-23 Maspro Denkoh Corp Yagi-uda antenna assembly
JP2006217000A (en) * 2005-02-01 2006-08-17 Fujitsu Ltd Meander line antenna
JP2006340186A (en) * 2005-06-03 2006-12-14 Yoshifusa Yamada Normal mode helical antenna, and manufacturing method of normal mode helical antenna
JP4662458B2 (en) * 2005-06-03 2011-03-30 吉英 山田 Normal mode helical antenna and manufacturing method of normal mode helical antenna
JP2007070112A (en) * 2005-08-08 2007-03-22 Nippon Sheet Glass Co Ltd Rack plate with antenna for article control rack, and article control rack using the rack plate with the antenna
JP2009218878A (en) * 2008-03-11 2009-09-24 Taiyo Yuden Co Ltd Antenna, circuit board, circuit module, and electronic device
WO2011111142A1 (en) * 2010-03-12 2011-09-15 パナソニック株式会社 Folded-dipole antenna

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