JPS57143904A - Antenna device - Google Patents

Antenna device

Info

Publication number
JPS57143904A
JPS57143904A JP2761981A JP2761981A JPS57143904A JP S57143904 A JPS57143904 A JP S57143904A JP 2761981 A JP2761981 A JP 2761981A JP 2761981 A JP2761981 A JP 2761981A JP S57143904 A JPS57143904 A JP S57143904A
Authority
JP
Japan
Prior art keywords
antennas
feeder
overall length
linear
dipole antennas
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
JP2761981A
Other languages
Japanese (ja)
Other versions
JPH022324B2 (en
Inventor
Kazuhiko Tamura
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.)
Yagi Antenna Co Ltd
Original Assignee
Yagi Antenna 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 Yagi Antenna Co Ltd filed Critical Yagi Antenna Co Ltd
Priority to JP2761981A priority Critical patent/JPS57143904A/en
Publication of JPS57143904A publication Critical patent/JPS57143904A/en
Publication of JPH022324B2 publication Critical patent/JPH022324B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/22—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element
    • H01Q19/24—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element the primary active element being centre-fed and substantially straight, e.g. H-antenna

Abstract

PURPOSE:To match an FM or AM broadcast receiving antenna with a 300OMEGA feeder, by using linear dipole antennas whose overall length is >=0.5 times as long as the wavelength of an in-use frequency, and connecting a capacitive reactance element for compensation. CONSTITUTION:To linear dipole antennas 6 and 6, a coil (L)7 and a capacitor (C)8 are connected in series at their terminals 9 and 9, and a feeder is also connected. A linear element 10 is arranged symmetrically in parallel to and at distance (d) from the antennas 6 and 6. The overall length of the antennas 6 and 6 is set about 0.55lambda at a 90-108MHz center frequency, and the series resonating circuit of the L7 and C8 has desired capacitive reactance at 90-108MHz; and large inductivity is obtained in a 170-222MHz band. The overall length of the element 10 is set to <=0.5lambda at 196MHz and its distance (d) is 0.033-0.085lambda. Thus, the linear dipole antennas are matched with a feeder having 300OMEGA impedance.
JP2761981A 1981-02-28 1981-02-28 Antenna device Granted JPS57143904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2761981A JPS57143904A (en) 1981-02-28 1981-02-28 Antenna device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2761981A JPS57143904A (en) 1981-02-28 1981-02-28 Antenna device

Publications (2)

Publication Number Publication Date
JPS57143904A true JPS57143904A (en) 1982-09-06
JPH022324B2 JPH022324B2 (en) 1990-01-17

Family

ID=12225955

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2761981A Granted JPS57143904A (en) 1981-02-28 1981-02-28 Antenna device

Country Status (1)

Country Link
JP (1) JPS57143904A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009276912A (en) * 2008-05-13 2009-11-26 Denso Wave Inc Information reader

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009276912A (en) * 2008-05-13 2009-11-26 Denso Wave Inc Information reader

Also Published As

Publication number Publication date
JPH022324B2 (en) 1990-01-17

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