JPS57155802A - Band pass filter - Google Patents

Band pass filter

Info

Publication number
JPS57155802A
JPS57155802A JP4194081A JP4194081A JPS57155802A JP S57155802 A JPS57155802 A JP S57155802A JP 4194081 A JP4194081 A JP 4194081A JP 4194081 A JP4194081 A JP 4194081A JP S57155802 A JPS57155802 A JP S57155802A
Authority
JP
Japan
Prior art keywords
cavity resonator
resonance frequency
mode
coupling
orthogonal
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.)
Granted
Application number
JP4194081A
Other languages
Japanese (ja)
Other versions
JPS625529B2 (en
Inventor
Masato Sakai
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4194081A priority Critical patent/JPS57155802A/en
Publication of JPS57155802A publication Critical patent/JPS57155802A/en
Publication of JPS625529B2 publication Critical patent/JPS625529B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
    • H01P1/2082—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with multimode resonators

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE:To give a pole at an othogonal mode resonance frequency to the attenuation characteristics, by coupling only the normal mode between the two cavities and not coupling at the orthogonal mode. CONSTITUTION:A microwave inputted from an input waveguide 1 passes through a coupling hole 8 and couples to a cavity resonator 3. The 1st stage cavity resonator 3 couples with a cavity resonator 4 through a coupling hole 15 and the cavity resonator 4 is outputted to an output waveguide through a coupling hole 10. The cavity resonators 3 and 4 are tuned to a resonance frequency f1 with resonance frequency adjusting screws 5 and 11 to form the two stages of band pass filters. On the other hand, the resonance frequency of the mode orthogonal to the normal mode in the cavity resonator 3 is adjusted to a resonance frequency f2 with an adjusting screw 19, a coupling adjusting screw 7 is inserted and coupled with the resonance frequency of the normal mode in the cavity resonator 3. Since the orthogonal mode is not coupled with the cavity resonator 4, an attenuation pole can be given to the frequency f2.
JP4194081A 1981-03-23 1981-03-23 Band pass filter Granted JPS57155802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4194081A JPS57155802A (en) 1981-03-23 1981-03-23 Band pass filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4194081A JPS57155802A (en) 1981-03-23 1981-03-23 Band pass filter

Publications (2)

Publication Number Publication Date
JPS57155802A true JPS57155802A (en) 1982-09-27
JPS625529B2 JPS625529B2 (en) 1987-02-05

Family

ID=12622206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4194081A Granted JPS57155802A (en) 1981-03-23 1981-03-23 Band pass filter

Country Status (1)

Country Link
JP (1) JPS57155802A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63155802A (en) * 1986-12-18 1988-06-29 Mitsubishi Electric Corp Band-pass filter
EP0782211A1 (en) * 1995-12-29 1997-07-02 Alcatel Dual-mode cavity filter
WO2004088785A1 (en) * 2003-03-28 2004-10-14 Matsushita Electric Industrial Co., Ltd. High frequency circuit element

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5499547A (en) * 1978-01-24 1979-08-06 Mitsubishi Electric Corp Resonant cavity type band pass filter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5499547A (en) * 1978-01-24 1979-08-06 Mitsubishi Electric Corp Resonant cavity type band pass filter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63155802A (en) * 1986-12-18 1988-06-29 Mitsubishi Electric Corp Band-pass filter
EP0782211A1 (en) * 1995-12-29 1997-07-02 Alcatel Dual-mode cavity filter
US5793271A (en) * 1995-12-29 1998-08-11 Alcatel Alsthom Compagnie Generale D'electricite Dual-mode cavity filter
WO2004088785A1 (en) * 2003-03-28 2004-10-14 Matsushita Electric Industrial Co., Ltd. High frequency circuit element
US7084721B2 (en) 2003-03-28 2006-08-01 Matsushita Electric Industrial Co., Ltd. RF circuit component

Also Published As

Publication number Publication date
JPS625529B2 (en) 1987-02-05

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