JPS5627514A - Tuning circuit of balanced antenna - Google Patents

Tuning circuit of balanced antenna

Info

Publication number
JPS5627514A
JPS5627514A JP10298079A JP10298079A JPS5627514A JP S5627514 A JPS5627514 A JP S5627514A JP 10298079 A JP10298079 A JP 10298079A JP 10298079 A JP10298079 A JP 10298079A JP S5627514 A JPS5627514 A JP S5627514A
Authority
JP
Japan
Prior art keywords
antenna
neutral point
tuning
tuning circuit
control
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
JP10298079A
Other languages
Japanese (ja)
Inventor
Masashi Shimakata
Shigeki Takeda
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP10298079A priority Critical patent/JPS5627514A/en
Publication of JPS5627514A publication Critical patent/JPS5627514A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—BASIC ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/005—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with variable reactance for tuning the antenna
    • H—ELECTRICITY
    • H01—BASIC ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them

Abstract

PURPOSE:To make it possible to control a tuning circuit without exerting an influence on the signal system of an antenna by connecting a couple of variable reactance element across a balanced antenna and by applying a control voltage between the electrically neutral point of the reactance elements and that of the antenna. CONSTITUTION:Between terminals 2 and 3 of loop antenna 1 as a balanced antenna, varactor diodes D1 and D2 are connected in series differing in polarity each other and further connected in parallel across loop antenna 1. Those diodes D1 and D2 are used providing the same capacity at the same control voltage, so that common connecting point 4 will be an electrically neutral point. From neutral point 5 of loop antenna 1, terminal 7 is led out through coil 6 providing high impedance for a signal and is grounded. Applying a tuning voltage to terminal 4 attains tuning control.
JP10298079A 1979-08-13 1979-08-13 Tuning circuit of balanced antenna Pending JPS5627514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10298079A JPS5627514A (en) 1979-08-13 1979-08-13 Tuning circuit of balanced antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10298079A JPS5627514A (en) 1979-08-13 1979-08-13 Tuning circuit of balanced antenna

Publications (1)

Publication Number Publication Date
JPS5627514A true JPS5627514A (en) 1981-03-17

Family

ID=14341870

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10298079A Pending JPS5627514A (en) 1979-08-13 1979-08-13 Tuning circuit of balanced antenna

Country Status (1)

Country Link
JP (1) JPS5627514A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181200A2 (en) * 1984-11-08 1986-05-14 Toyota Jidosha Kabushiki Kaisha Automobile signal receiving apparatus
WO1992020117A1 (en) * 1991-05-09 1992-11-12 Seiko Epson Corporation Antenna and small portable radio device
FR2724274A1 (en) * 1994-09-07 1996-03-08 Telediffusion Fse Portable transceiver device for radio data system
US5532705A (en) * 1993-03-17 1996-07-02 Seiko Epson Corporation Wrist-mounted-type antenna device and apparatus having the antenna device
US5589840A (en) * 1991-11-05 1996-12-31 Seiko Epson Corporation Wrist-type wireless instrument and antenna apparatus
US5673054A (en) * 1991-05-09 1997-09-30 Seiko Epson Corporation Antenna and miniature portable wireless transceiver
US5757326A (en) * 1993-03-29 1998-05-26 Seiko Epson Corporation Slot antenna device and wireless apparatus employing the antenna device
US5946610A (en) * 1994-10-04 1999-08-31 Seiko Epson Corporation Portable radio apparatus having a slot antenna
EP1403963A2 (en) * 2002-09-27 2004-03-31 Bose Corporation AM Antenna Noise Reduction
JP2006196943A (en) * 2005-01-11 2006-07-27 Denso Corp High frequency switch

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181200A2 (en) * 1984-11-08 1986-05-14 Toyota Jidosha Kabushiki Kaisha Automobile signal receiving apparatus
WO1992020117A1 (en) * 1991-05-09 1992-11-12 Seiko Epson Corporation Antenna and small portable radio device
US5673054A (en) * 1991-05-09 1997-09-30 Seiko Epson Corporation Antenna and miniature portable wireless transceiver
US5589840A (en) * 1991-11-05 1996-12-31 Seiko Epson Corporation Wrist-type wireless instrument and antenna apparatus
US5532705A (en) * 1993-03-17 1996-07-02 Seiko Epson Corporation Wrist-mounted-type antenna device and apparatus having the antenna device
US5757326A (en) * 1993-03-29 1998-05-26 Seiko Epson Corporation Slot antenna device and wireless apparatus employing the antenna device
US5940041A (en) * 1993-03-29 1999-08-17 Seiko Epson Corporation Slot antenna device and wireless apparatus employing the antenna device
FR2724274A1 (en) * 1994-09-07 1996-03-08 Telediffusion Fse Portable transceiver device for radio data system
US5946610A (en) * 1994-10-04 1999-08-31 Seiko Epson Corporation Portable radio apparatus having a slot antenna
EP1403963A2 (en) * 2002-09-27 2004-03-31 Bose Corporation AM Antenna Noise Reduction
EP1403963A3 (en) * 2002-09-27 2004-04-28 Bose Corporation AM Antenna Noise Reduction
US6867745B2 (en) 2002-09-27 2005-03-15 Bose Corporation AM antenna noise reducing
EP1615292A1 (en) * 2002-09-27 2006-01-11 Bose Corporation AM antenna noise reduction
JP2006196943A (en) * 2005-01-11 2006-07-27 Denso Corp High frequency switch
JP4526394B2 (en) * 2005-01-11 2010-08-18 株式会社デンソー High frequency switch

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