JPS56708A - Tuning type antenna unit - Google Patents

Tuning type antenna unit

Info

Publication number
JPS56708A
JPS56708A JP7625679A JP7625679A JPS56708A JP S56708 A JPS56708 A JP S56708A JP 7625679 A JP7625679 A JP 7625679A JP 7625679 A JP7625679 A JP 7625679A JP S56708 A JPS56708 A JP S56708A
Authority
JP
Japan
Prior art keywords
impedance
antenna
semifixed
dispersion
circuit
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
JP7625679A
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 JP7625679A priority Critical patent/JPS56708A/en
Publication of JPS56708A publication Critical patent/JPS56708A/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

Landscapes

  • Details Of Aerials (AREA)

Abstract

PURPOSE:To increase the characteristics for transmission and reception system, by absorbing the dispersion in the tuned frequency range with the constant adjustment of the semifixed reactance circuit. CONSTITUTION:The semifixed reactance circuits 2, 2' are provided at the power feeding side of the antenna elements 1, 1' and the two constitute the antenna element by series circuit, then the synthesis of the impedance of each element and that of semifixed reactance is the impedance of the antenna element. Accordingly, by adjusting the impedance by adding the impedance in the tuning circuit 3 to this antenna impedance, the impedance at the power feeding terminals 4, 4' is a required pure resistance value to the frequencies to be tuned. Thus, since the dispersion of tuned frequency range caused by the dispersion in the constant of elements constituting the antenna circuit is absorbed, the characteristic of the transmission and reception system can be increased.
JP7625679A 1979-06-14 1979-06-14 Tuning type antenna unit Pending JPS56708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7625679A JPS56708A (en) 1979-06-14 1979-06-14 Tuning type antenna unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7625679A JPS56708A (en) 1979-06-14 1979-06-14 Tuning type antenna unit

Publications (1)

Publication Number Publication Date
JPS56708A true JPS56708A (en) 1981-01-07

Family

ID=13600115

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7625679A Pending JPS56708A (en) 1979-06-14 1979-06-14 Tuning type antenna unit

Country Status (1)

Country Link
JP (1) JPS56708A (en)

Cited By (1)

* 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

Cited By (2)

* 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

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