JPS59194501A - Trap circuit - Google Patents

Trap circuit

Info

Publication number
JPS59194501A
JPS59194501A JP7031383A JP7031383A JPS59194501A JP S59194501 A JPS59194501 A JP S59194501A JP 7031383 A JP7031383 A JP 7031383A JP 7031383 A JP7031383 A JP 7031383A JP S59194501 A JPS59194501 A JP S59194501A
Authority
JP
Japan
Prior art keywords
circuit
amplifier
output
constituted
microstrip line
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
JP7031383A
Other versions
JPH0134483B2 (en
Inventor
Takeshi Minato
Original Assignee
Matsushita Electric Ind 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 Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Priority to JP7031383A priority Critical patent/JPH0134483B2/ja
Publication of JPS59194501A publication Critical patent/JPS59194501A/en
Publication of JPH0134483B2 publication Critical patent/JPH0134483B2/ja
Application status is Expired legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00Auxiliary devices
    • H01P1/20Frequency-selective devices, e.g. filters
    • H01P1/201Filters for transverse electromagnetic waves
    • H01P1/203Strip line filters

Abstract

PURPOSE:To obtain about 30dB attenuation e.g. at 800MHz and to prevent loss due to insertion of a trap circuit at 900MHz+ or -50MHz by connecting a 1/4 wavelength leading end opening line to one end of an output circuit. CONSTITUTION:An input matching/tuning circuit 1 is a resonator charging the capacity C1 of a lumped constant element to a microstrip line L1 and matches/ tunes the impedance of an input part. A high frequency amplifier 2 consists of a high frequency transistor Q1. A bias supplying circuit 3 is connected to the amplifier 2. An output matching/tuning circuit 4 is connected to the output side of the amplifier 2 and matches/tunes the impedance of an output part constituted by capacitors C3, C4 and a microstrip line L2. A tuning amplifier is constituted by said circuits 1-4. A trapping circuit 5 is constituted by the 1/4 wavelength leading end opening line L3 consisting of a microstrip line.
JP7031383A 1983-04-20 1983-04-20 Expired JPH0134483B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7031383A JPH0134483B2 (en) 1983-04-20 1983-04-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7031383A JPH0134483B2 (en) 1983-04-20 1983-04-20

Publications (2)

Publication Number Publication Date
JPS59194501A true JPS59194501A (en) 1984-11-05
JPH0134483B2 JPH0134483B2 (en) 1989-07-19

Family

ID=13427834

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7031383A Expired JPH0134483B2 (en) 1983-04-20 1983-04-20

Country Status (1)

Country Link
JP (1) JPH0134483B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6314501A (en) * 1986-07-07 1988-01-21 Matsushita Electric Ind Co Ltd High frequency filter
EP0614243A1 (en) * 1993-03-03 1994-09-07 Lk-Products Oy Electrical filter
EP0614242A1 (en) * 1993-03-03 1994-09-07 Lk-Products Oy Electrical filter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6314501A (en) * 1986-07-07 1988-01-21 Matsushita Electric Ind Co Ltd High frequency filter
EP0614243A1 (en) * 1993-03-03 1994-09-07 Lk-Products Oy Electrical filter
EP0614242A1 (en) * 1993-03-03 1994-09-07 Lk-Products Oy Electrical filter
US5467065A (en) * 1993-03-03 1995-11-14 Lk-Products Oy Filter having resonators coupled by a saw filter and a duplex filter formed therefrom

Also Published As

Publication number Publication date
JPH0134483B2 (en) 1989-07-19

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