JPS55104103A - Microstrip bandpass filter - Google Patents

Microstrip bandpass filter

Info

Publication number
JPS55104103A
JPS55104103A JP1038279A JP1038279A JPS55104103A JP S55104103 A JPS55104103 A JP S55104103A JP 1038279 A JP1038279 A JP 1038279A JP 1038279 A JP1038279 A JP 1038279A JP S55104103 A JPS55104103 A JP S55104103A
Authority
JP
Japan
Prior art keywords
line
input
lines
output
coupling
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
JP1038279A
Other languages
Japanese (ja)
Other versions
JPS6126722B2 (en
Inventor
Takeshi Saito
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1038279A priority Critical patent/JPS55104103A/en
Publication of JPS55104103A publication Critical patent/JPS55104103A/en
Publication of JPS6126722B2 publication Critical patent/JPS6126722B2/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
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/203—Strip line filters
    • H01P1/20327—Electromagnetic interstage coupling
    • H01P1/20354—Non-comb or non-interdigital filters
    • H01P1/20381—Special shape resonators

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE:To reduce the loss within pass band and to increase the attenuation out of band, by constituting two stages of BPF through the arrangement of one wave length lines of rectangular shape parallelly by two lines, and providing the coupling line having open end between the input and output lines. CONSTITUTION:The rectangular one wave length closed lines 7, 8 are parallelly arranged, and the input line 5 is made adjacent to the input section 7a of the line 7, the output line 6 is made adjacent to the output section 8b of the line 8, and the coupling line 11 is placed in adjacency to the input section 8a of the output section 7b of the line 7 and the input section 8a of the line 8. The lines 7, 8 have the single tuning characteristics of the same resonant frequency and BPF is constituted with the stagger tuning circuit connection. Further, at the coupling between the input and output by the input line 5 and the coupling line 9, trap is caused at the almost symmetrical location to the center frequency. Accordingly, by changing the length l of the line 9' the location of trap frequency can be changed. Further, the effect on the pass band characteristics for the shift in resonant frequency can be finely tuned with the adjusting line 10 of the line 7.
JP1038279A 1979-02-02 1979-02-02 Microstrip bandpass filter Granted JPS55104103A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1038279A JPS55104103A (en) 1979-02-02 1979-02-02 Microstrip bandpass filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1038279A JPS55104103A (en) 1979-02-02 1979-02-02 Microstrip bandpass filter

Publications (2)

Publication Number Publication Date
JPS55104103A true JPS55104103A (en) 1980-08-09
JPS6126722B2 JPS6126722B2 (en) 1986-06-21

Family

ID=11748569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1038279A Granted JPS55104103A (en) 1979-02-02 1979-02-02 Microstrip bandpass filter

Country Status (1)

Country Link
JP (1) JPS55104103A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3035293A1 (en) * 1979-09-19 1981-04-02 Hitachi, Ltd., Tokyo BAND PASS FILTER
JPH0637503A (en) * 1992-06-12 1994-02-10 Matsushita Electric Ind Co Ltd Microwave resonator and filter circuit using this resonator
US5786303A (en) * 1994-06-22 1998-07-28 Com Dev Ltd. Planar multi-resonator bandpass filter
ES2246124A1 (en) * 2004-02-17 2006-02-01 Universidad Politecnica De Madrid Active step-band filter structure for filtering sections of interference in e.g. transmission line, has interference sections separated by insulating stages, where constructive interference is maintained in passage band
JP2011188088A (en) * 2010-03-05 2011-09-22 Ntt Docomo Inc Circuit element, variable resonator, and variable filter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3035293A1 (en) * 1979-09-19 1981-04-02 Hitachi, Ltd., Tokyo BAND PASS FILTER
JPH0637503A (en) * 1992-06-12 1994-02-10 Matsushita Electric Ind Co Ltd Microwave resonator and filter circuit using this resonator
US5786303A (en) * 1994-06-22 1998-07-28 Com Dev Ltd. Planar multi-resonator bandpass filter
ES2246124A1 (en) * 2004-02-17 2006-02-01 Universidad Politecnica De Madrid Active step-band filter structure for filtering sections of interference in e.g. transmission line, has interference sections separated by insulating stages, where constructive interference is maintained in passage band
JP2011188088A (en) * 2010-03-05 2011-09-22 Ntt Docomo Inc Circuit element, variable resonator, and variable filter
US8760244B2 (en) 2010-03-05 2014-06-24 Ntt Docomo, Inc. Multirole circuit element capable of operating as variable resonator or transmission line and variable filter incorporating the same

Also Published As

Publication number Publication date
JPS6126722B2 (en) 1986-06-21

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