JPS5673904A - Antenna device - Google Patents

Antenna device

Info

Publication number
JPS5673904A
JPS5673904A JP15106579A JP15106579A JPS5673904A JP S5673904 A JPS5673904 A JP S5673904A JP 15106579 A JP15106579 A JP 15106579A JP 15106579 A JP15106579 A JP 15106579A JP S5673904 A JPS5673904 A JP S5673904A
Authority
JP
Japan
Prior art keywords
switches
antenna
capacitors
terminals
switched
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
JP15106579A
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 JP15106579A priority Critical patent/JPS5673904A/en
Publication of JPS5673904A publication Critical patent/JPS5673904A/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
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • H01Q9/145—Length of element or elements adjustable by varying the electrical length

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

PURPOSE:To enable to switch the characteristics of antenna into broad/narrow band, by switching the lumped parameter at a feeding point with a switch provided at the feeding point. CONSTITUTION:Switches 15, 15' are set a closing state, so that capacitors 14, 14' cannot be connected to elements 13, 13'. Switches 18, 18' are connected to terminals 21, 21' to connect fixed capacitors 22, 22'. Thus, antennas shown the tuning characteristics of a wide variety. The switches 15, 15' are set to open, and the switches 18, 18' are switched to terminals 19, 19' to connect variable capacitors 20, 20'. Thus, the antenna shows the tuning characteristics of a narrow band. The switches 15, 15' and switches 18, 18' are interlocked and the antenna characteristics can be switched in one operation.
JP15106579A 1979-11-20 1979-11-20 Antenna device Pending JPS5673904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15106579A JPS5673904A (en) 1979-11-20 1979-11-20 Antenna device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15106579A JPS5673904A (en) 1979-11-20 1979-11-20 Antenna device

Publications (1)

Publication Number Publication Date
JPS5673904A true JPS5673904A (en) 1981-06-19

Family

ID=15510527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15106579A Pending JPS5673904A (en) 1979-11-20 1979-11-20 Antenna device

Country Status (1)

Country Link
JP (1) JPS5673904A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187488A (en) * 1989-11-14 1993-02-16 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Tunable high-frequency antenna
EP0869579A1 (en) * 1997-04-01 1998-10-07 Murata Manufacturing Co., Ltd. Antenna device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187488A (en) * 1989-11-14 1993-02-16 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Tunable high-frequency antenna
EP0869579A1 (en) * 1997-04-01 1998-10-07 Murata Manufacturing Co., Ltd. Antenna device

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