JPS57125504A - Antenna device - Google Patents

Antenna device

Info

Publication number
JPS57125504A
JPS57125504A JP56012104A JP1210481A JPS57125504A JP S57125504 A JPS57125504 A JP S57125504A JP 56012104 A JP56012104 A JP 56012104A JP 1210481 A JP1210481 A JP 1210481A JP S57125504 A JPS57125504 A JP S57125504A
Authority
JP
Japan
Prior art keywords
coil
series
capacitor
resonance circuit
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
JP56012104A
Other languages
Japanese (ja)
Inventor
Kazuhiko Tamura
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.)
Yagi Antenna Co Ltd
Original Assignee
Yagi Antenna 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 Yagi Antenna Co Ltd filed Critical Yagi Antenna Co Ltd
Priority to JP56012104A priority Critical patent/JPS57125504A/en
Publication of JPS57125504A publication Critical patent/JPS57125504A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching

Landscapes

  • Details Of Aerials (AREA)

Abstract

PURPOSE:To achieve excellent matching with a feeder at two frequency bands, by connecting a coil and a capacitor in series with an antenna and connecting a series resonance circuit in parallel with an antenna output terminal. CONSTITUTION:A coil 12 is connected in series with a linear dipole antenna 11. The coil cancells a capacitive reactance at >=155MHz frequencies and improves the VSWR at 170-222MHz remarkably. A capacitor 13 is connected in series with the coil 12 to form a series resonance circuit to cancell an inductive reactance at 90-180MHz which is increased further and to compensate this inductive reactance. Further, a series resonance circuit consisting of a capacitor 15 and a coil 16 is connected in parallel with an output terminal 14. This circuit shows a desired capacitive reactance at 90-180MHz band and a very large inductive reactance at 170-222MHz. As a result, excellent impedance characteristics can be obtained at both of high and low frequecy bands.
JP56012104A 1981-01-29 1981-01-29 Antenna device Pending JPS57125504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56012104A JPS57125504A (en) 1981-01-29 1981-01-29 Antenna device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56012104A JPS57125504A (en) 1981-01-29 1981-01-29 Antenna device

Publications (1)

Publication Number Publication Date
JPS57125504A true JPS57125504A (en) 1982-08-04

Family

ID=11796252

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56012104A Pending JPS57125504A (en) 1981-01-29 1981-01-29 Antenna device

Country Status (1)

Country Link
JP (1) JPS57125504A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5019342B1 (en) * 1970-12-04 1975-07-05
JPS5295144A (en) * 1976-02-06 1977-08-10 Matsushita Electric Ind Co Ltd Antenna

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5019342B1 (en) * 1970-12-04 1975-07-05
JPS5295144A (en) * 1976-02-06 1977-08-10 Matsushita Electric Ind Co Ltd Antenna

Similar Documents

Publication Publication Date Title
US3736591A (en) Receiving antenna for miniature radio receiver
US3918062A (en) Receiving loop antenna system
JPS54128653A (en) Antenna unit for receiver
EP0613209A1 (en) A two-frequency impedance matching circuit for an antenna
JPS6439812A (en) Television radio frequency input circuit
GB692692A (en) Improvements in and relating to radio aerials
JPS56711A (en) Antenna unit
GB697193A (en) Reflection-free antenna
JPS57125504A (en) Antenna device
JPS5627507A (en) Loop antenna unit
GB921950A (en) Broad band loop antenna
GB770166A (en) Microwave radio receiver
JPS5758402A (en) Loop antenna common use for two frequencies
JPS5658310A (en) Wide band distributor
JPS56713A (en) Antenna unit
GB580812A (en) Improvements in arrangements for coupling wide frequency band antennae to transmission lines
JPS562707A (en) Antenna
JPS6454906A (en) Reception antenna
JPS57143904A (en) Antenna device
JPS56707A (en) Tuning type antenna unit
JPS5684017A (en) High frequency hybrid integrated circuit
KR100216245B1 (en) Single sleeve antenna for multi-frequency
JPS5566835A (en) Magnetron
JPS6415908A (en) Radio frequency tuning inductor
JPS56712A (en) Antenna unit