JPS568904A - Antenna unit - Google Patents

Antenna unit

Info

Publication number
JPS568904A
JPS568904A JP7597580A JP7597580A JPS568904A JP S568904 A JPS568904 A JP S568904A JP 7597580 A JP7597580 A JP 7597580A JP 7597580 A JP7597580 A JP 7597580A JP S568904 A JPS568904 A JP S568904A
Authority
JP
Japan
Prior art keywords
antenna
voltage
tuning
slider
diode
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
JP7597580A
Other languages
Japanese (ja)
Inventor
Shiyouichi Ishii
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7597580A priority Critical patent/JPS568904A/en
Publication of JPS568904A publication Critical patent/JPS568904A/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)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

PURPOSE:To make it possible to obtain a desired gain by varying the electric lengths of elements for an antenna by a control signal from a receiver. CONSTITUTION:Through the operation of receiving tuning knob 20 of FM tuner 10, slider 21 of variable resistor 19 is driven and the voltage of slider 21 is applied to a varactor diode to exercise tuning control over an input tuning circuit and local oscillating tuning circuit. On the other hand, coil 25 and voltage varactor diode 26 are interposed in series between two antenna elements 241 and 242 of half-wavelength dipole antenna 24 and through coaxial cable 27, the voltage of slider 21 is applied across diode 26, whose capacity is varied with the voltage to vary the electric length of antenna 24, thereby equalizing the tuning frequency of antenna 26 to a reception frequency.
JP7597580A 1980-06-05 1980-06-05 Antenna unit Pending JPS568904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7597580A JPS568904A (en) 1980-06-05 1980-06-05 Antenna unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7597580A JPS568904A (en) 1980-06-05 1980-06-05 Antenna unit

Related Child Applications (2)

Application Number Title Priority Date Filing Date
JP8797180A Division JPS572104A (en) 1980-06-30 1980-06-30 Antenna device
JP8797080A Division JPS572132A (en) 1980-06-30 1980-06-30 Receiving device

Publications (1)

Publication Number Publication Date
JPS568904A true JPS568904A (en) 1981-01-29

Family

ID=13591748

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7597580A Pending JPS568904A (en) 1980-06-05 1980-06-05 Antenna unit

Country Status (1)

Country Link
JP (1) JPS568904A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409294A (en) * 1980-05-29 1983-10-11 Nippon Piston Ring Co., Ltd. Sliding member for use in an internal combustion engine
JPS60228706A (en) * 1984-04-25 1985-11-14 Hitachi Ltd Wear resisting blade
US4761344A (en) * 1986-04-14 1988-08-02 Nissan Motor Co., Ltd. Vehicle component part
JPH05140689A (en) * 1991-01-11 1993-06-08 Toyo Kohan Co Ltd High corrosion resistant and high wear resistant boride tungsten base alloy

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409294A (en) * 1980-05-29 1983-10-11 Nippon Piston Ring Co., Ltd. Sliding member for use in an internal combustion engine
JPS60228706A (en) * 1984-04-25 1985-11-14 Hitachi Ltd Wear resisting blade
US4761344A (en) * 1986-04-14 1988-08-02 Nissan Motor Co., Ltd. Vehicle component part
JPH05140689A (en) * 1991-01-11 1993-06-08 Toyo Kohan Co Ltd High corrosion resistant and high wear resistant boride tungsten base alloy

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