JPS5784601A - Helical filter - Google Patents

Helical filter

Info

Publication number
JPS5784601A
JPS5784601A JP16010880A JP16010880A JPS5784601A JP S5784601 A JPS5784601 A JP S5784601A JP 16010880 A JP16010880 A JP 16010880A JP 16010880 A JP16010880 A JP 16010880A JP S5784601 A JPS5784601 A JP S5784601A
Authority
JP
Japan
Prior art keywords
helical
impedance
resonator
band
input
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
JP16010880A
Other languages
Japanese (ja)
Inventor
Noriyuki Kawamoto
Harumasa Kajita
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 JP16010880A priority Critical patent/JPS5784601A/en
Publication of JPS5784601A publication Critical patent/JPS5784601A/en
Pending 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
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other

Landscapes

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

Abstract

PURPOSE:To prevent the extreme lowering in impedance at the outside of an objective band, by connecting a capacitance to an input or output side of a helical filter. CONSTITUTION:One end of an input helical resonator 2, output helical resonator 3, impedance matching coil 5 is connected to a case 1 in a grounded case 1, and another end of the resonator 2 is connected in series with a capacitor 11 at an input terminal 7, and another end of the resonator 3 is connected with a capacitor 12 in series at an output terminal 8. In the helical filter with such a constitution, the impedance is good of course, in a desired band, and even at the outside of the desired band, almost infinite impedance is given at the upper band and a large negative impedance is obtained at a lower band. Thus, the effect of filters at a coupling point 10 can almost be avoided by using a branch device or mixer by using helical filters f1-fn with such characteristics.
JP16010880A 1980-11-15 1980-11-15 Helical filter Pending JPS5784601A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16010880A JPS5784601A (en) 1980-11-15 1980-11-15 Helical filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16010880A JPS5784601A (en) 1980-11-15 1980-11-15 Helical filter

Publications (1)

Publication Number Publication Date
JPS5784601A true JPS5784601A (en) 1982-05-27

Family

ID=15708018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16010880A Pending JPS5784601A (en) 1980-11-15 1980-11-15 Helical filter

Country Status (1)

Country Link
JP (1) JPS5784601A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5334952A (en) * 1976-09-10 1978-03-31 Teruo Ri Method of making melon juice

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5334952A (en) * 1976-09-10 1978-03-31 Teruo Ri Method of making melon juice

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