JPS57132434A - Feed device for antenna - Google Patents

Feed device for antenna

Info

Publication number
JPS57132434A
JPS57132434A JP1941281A JP1941281A JPS57132434A JP S57132434 A JPS57132434 A JP S57132434A JP 1941281 A JP1941281 A JP 1941281A JP 1941281 A JP1941281 A JP 1941281A JP S57132434 A JPS57132434 A JP S57132434A
Authority
JP
Japan
Prior art keywords
feeder
impedance
low capacity
type antenna
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.)
Pending
Application number
JP1941281A
Other languages
Japanese (ja)
Inventor
Yuuichi Fudewaki
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1941281A priority Critical patent/JPS57132434A/en
Publication of JPS57132434A publication Critical patent/JPS57132434A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks

Landscapes

  • Details Of Aerials (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

PURPOSE:To improve an FM receiving characteristic, by setting the length of an auxiliary feeder to about 1/4 of wavelength against the receiving frequency, and setting the impedance of the auxiliary feeder to (Z1, Z2)<1/2> when the impedance of an antenna and a low capacity feeder is set to Z1, Z2. CONSTITUTION:Between a lid type antenna consisting of a trunk lid 2 and a body 1, and a feeder of low capacity, an auxiliary feeder 16 is provided. Length of this feeder 16 is about 1/4 of wavelength to frequency against the receiving center frequency containing the contraction rate, and its impedance is about (Z1, Z2)<1/2> (in the expression, Z1 and Z2 denote output impedance of the lid type antenna and characteristic impedance of the feeder of low capacity, respectively). Also, an output of the lid type antenna is led to a radio receiver 9 for a car by a feeder 10 of low capacity through a feeder 16. In this case, the feeder 16 is operated as an impedance matching box to the output impedance of the lid type antenna and the characteristic impedance of the feeder 10.
JP1941281A 1981-02-09 1981-02-09 Feed device for antenna Pending JPS57132434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1941281A JPS57132434A (en) 1981-02-09 1981-02-09 Feed device for antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1941281A JPS57132434A (en) 1981-02-09 1981-02-09 Feed device for antenna

Publications (1)

Publication Number Publication Date
JPS57132434A true JPS57132434A (en) 1982-08-16

Family

ID=11998532

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1941281A Pending JPS57132434A (en) 1981-02-09 1981-02-09 Feed device for antenna

Country Status (1)

Country Link
JP (1) JPS57132434A (en)

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