JPS5748803A - Temperature compensation device for coaxial type filter - Google Patents

Temperature compensation device for coaxial type filter

Info

Publication number
JPS5748803A
JPS5748803A JP12431980A JP12431980A JPS5748803A JP S5748803 A JPS5748803 A JP S5748803A JP 12431980 A JP12431980 A JP 12431980A JP 12431980 A JP12431980 A JP 12431980A JP S5748803 A JPS5748803 A JP S5748803A
Authority
JP
Japan
Prior art keywords
supporting rod
inner conductor
temperature
metallic
length
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
JP12431980A
Other languages
Japanese (ja)
Inventor
Tetsuro Kasagi
Yasunaga Murakami
Norihiko Shimada
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.)
DKK Co Ltd
Original Assignee
Denki Kogyo 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 Denki Kogyo Co Ltd filed Critical Denki Kogyo Co Ltd
Priority to JP12431980A priority Critical patent/JPS5748803A/en
Publication of JPS5748803A publication Critical patent/JPS5748803A/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
    • H01P1/202—Coaxial filters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Non-Reversible Transmitting Devices (AREA)

Abstract

PURPOSE:To avoid the frequency change against temperature change, by selecting the linear expansion coefficient due to temperature so that the expansion and compression of a metallic rod fitted in parallel with a supporting rod through clipping the supporting rod of an inner conductor between outer conductors can be cancelled with that of the supporting rod. CONSTITUTION:A temperature compensating device 6 consisting of metallic rods of left and right pair which clip a supporting rod 4 and lead in parallel with the supporting rod, is provided to the lower outside of an outer condutor 1 of a coaxial type filter consisting of the outer conductor, inner conductor 2, inner conductor expansion and contracting metallic fixture 3, inner conductor supporting rod 4 and a fixing metallic fixture for the supporting rod 4. Taking the length of the supporting rod 4 at a temperature T as la, the length of the device 6 as lb, the change in the supporting rod 4 and the device 6 as + or -DELTAla, + or -DELTAlb,when the temperature changes by + or -DELTAT, then the length of the inner conductor 2 is as expressed in equation. By selecting the linear expansion coefficient of the metallic rod 4 and the device 6 so that + or -DELTAla - or + DELTAlb=0 can be obtained, the length of the inner conductor 2 is not changed against the temperature change, resulting that the tuning frequency of a coaxial filter is not changed, allowing to make stable the characteristics of the filter.
JP12431980A 1980-09-08 1980-09-08 Temperature compensation device for coaxial type filter Pending JPS5748803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12431980A JPS5748803A (en) 1980-09-08 1980-09-08 Temperature compensation device for coaxial type filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12431980A JPS5748803A (en) 1980-09-08 1980-09-08 Temperature compensation device for coaxial type filter

Publications (1)

Publication Number Publication Date
JPS5748803A true JPS5748803A (en) 1982-03-20

Family

ID=14882384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12431980A Pending JPS5748803A (en) 1980-09-08 1980-09-08 Temperature compensation device for coaxial type filter

Country Status (1)

Country Link
JP (1) JPS5748803A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01135104A (en) * 1987-11-20 1989-05-26 Nec Corp Cavity resonator
KR100365888B1 (en) * 2000-02-18 2002-12-26 피닉스코리아 주식회사 Artificial nail and method for making the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5218045U (en) * 1975-07-16 1977-02-08

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5218045U (en) * 1975-07-16 1977-02-08

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01135104A (en) * 1987-11-20 1989-05-26 Nec Corp Cavity resonator
KR100365888B1 (en) * 2000-02-18 2002-12-26 피닉스코리아 주식회사 Artificial nail and method for making the same

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