JPS5787225A - Band pass filter for very high frequency - Google Patents

Band pass filter for very high frequency

Info

Publication number
JPS5787225A
JPS5787225A JP16364180A JP16364180A JPS5787225A JP S5787225 A JPS5787225 A JP S5787225A JP 16364180 A JP16364180 A JP 16364180A JP 16364180 A JP16364180 A JP 16364180A JP S5787225 A JPS5787225 A JP S5787225A
Authority
JP
Japan
Prior art keywords
bpf
attenuation
high frequency
frequency
resonators
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
JP16364180A
Other languages
Japanese (ja)
Inventor
Mitsuo Makimoto
Sadahiko Yamashita
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 JP16364180A priority Critical patent/JPS5787225A/en
Publication of JPS5787225A publication Critical patent/JPS5787225A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1775—Parallel LC in shunt or branch path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/075—Ladder networks, e.g. electric wave filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1708—Comprising bridging elements, i.e. elements in a series path without own reference to ground and spanning branching nodes of another series path

Landscapes

  • Filters And Equalizers (AREA)

Abstract

PURPOSE:To improve the attenuation characteristic, by providing a branch circuit, which couples resonators in the first stage and the 2Nth stage (N is an integer >=3), in the BPF for extra-high frequency consisting of >=7 odd stages. CONSTITUTION:A branch circuit 618 is provided between coupling points 619 and 620 of resonators in the first and the sixth stages of a BPF for extra-high frequency of 7 stages consisting of resonators 603-609 and coupling circuits 610- 617 of the BPF. When the phase quantity in a prescribed frequency in the attenuation band of the branch circuit is so selected that the phase is opposite to that of the phase quantity of a main transmission line consisting of coupling circuits, an attenuation pole is generated in the frequency to improve the attenuation characteristic. Further, since the one-stage BPF is connected after branching and coupling to the main transmission line, the attenuation characteristic in frequencies higher or lower than the attenuation polar frequency is good.
JP16364180A 1980-11-19 1980-11-19 Band pass filter for very high frequency Pending JPS5787225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16364180A JPS5787225A (en) 1980-11-19 1980-11-19 Band pass filter for very high frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16364180A JPS5787225A (en) 1980-11-19 1980-11-19 Band pass filter for very high frequency

Publications (1)

Publication Number Publication Date
JPS5787225A true JPS5787225A (en) 1982-05-31

Family

ID=15777798

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16364180A Pending JPS5787225A (en) 1980-11-19 1980-11-19 Band pass filter for very high frequency

Country Status (1)

Country Link
JP (1) JPS5787225A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6169209A (en) * 1984-09-13 1986-04-09 Yagi Antenna Co Ltd Band path filter
JPS632411A (en) * 1986-06-23 1988-01-07 Kokusai Electric Co Ltd Method for coupling minute capacity between input and output of band-pass filter with attenuation pole
JP2009518953A (en) * 2005-12-06 2009-05-07 Ｔｄｋ株式会社 Thin film bandpass filter using inductor-capacitor resonator
JP2013048491A (en) * 2007-08-23 2013-03-07 Taiyo Yuden Co Ltd Filter, duplexer, and module and communication apparatus including duplexer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6169209A (en) * 1984-09-13 1986-04-09 Yagi Antenna Co Ltd Band path filter
JPS632411A (en) * 1986-06-23 1988-01-07 Kokusai Electric Co Ltd Method for coupling minute capacity between input and output of band-pass filter with attenuation pole
JPH0340533B2 (en) * 1986-06-23 1991-06-19
JP2009518953A (en) * 2005-12-06 2009-05-07 Ｔｄｋ株式会社 Thin film bandpass filter using inductor-capacitor resonator
JP2013048491A (en) * 2007-08-23 2013-03-07 Taiyo Yuden Co Ltd Filter, duplexer, and module and communication apparatus including duplexer

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