EP0883203A3 - Filter with temperature compensated tuning screw - Google Patents

Filter with temperature compensated tuning screw Download PDF

Info

Publication number
EP0883203A3
EP0883203A3 EP98304360A EP98304360A EP0883203A3 EP 0883203 A3 EP0883203 A3 EP 0883203A3 EP 98304360 A EP98304360 A EP 98304360A EP 98304360 A EP98304360 A EP 98304360A EP 0883203 A3 EP0883203 A3 EP 0883203A3
Authority
EP
European Patent Office
Prior art keywords
cavity
support
screw
compensating screw
compensating
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.)
Withdrawn
Application number
EP98304360A
Other languages
German (de)
French (fr)
Other versions
EP0883203A2 (en
Inventor
Steven Barton Lundquist
Andre J. Zybura
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.)
Com Dev Ltd
Original Assignee
Com Dev 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 Com Dev Ltd filed Critical Com Dev Ltd
Publication of EP0883203A2 publication Critical patent/EP0883203A2/en
Publication of EP0883203A3 publication Critical patent/EP0883203A3/en
Withdrawn legal-status Critical Current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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/30—Auxiliary devices for compensation of, or protection against, temperature or moisture effects ; for improving power handling capability
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/06—Cavity resonators

Landscapes

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

Abstract

A temperature compensated filter has a compensating screw (18) mounted in a support (40) in the wall (22) of a cavity. The support is made from a material having a high coefficient of thermal expansion compared to the material of the cavity and the material of the compensating screw. As temperature changes, the support moves the compensating screw either further into the cavity or further out of the cavity to compensate for the change in resonant frequency of the cavity that would otherwise occur. The compensating screw can be used with single, dual or triple mode cavities. The compensating screw can be made of metallic material or it can be made of non-metallic material with a metallic outer surface. The compensating screw is locked in the support before the support is inserted into the wall of the cavity. The support is then locked in the wall of the cavity and the screw automatically changes position within the cavity as temperature changes. An RF barrier (50) can be used to prevent RF energy from the cavity from entering the area of the support.
EP98304360A 1997-06-02 1998-06-02 Filter with temperature compensated tuning screw Withdrawn EP0883203A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2206942 1997-06-02
CA002206942A CA2206942C (en) 1997-06-02 1997-06-02 Filter with temperature compensated tuning screw

Publications (2)

Publication Number Publication Date
EP0883203A2 EP0883203A2 (en) 1998-12-09
EP0883203A3 true EP0883203A3 (en) 1999-10-27

Family

ID=4160815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98304360A Withdrawn EP0883203A3 (en) 1997-06-02 1998-06-02 Filter with temperature compensated tuning screw

Country Status (2)

Country Link
EP (1) EP0883203A3 (en)
CA (1) CA2206942C (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9406988B2 (en) 2011-08-23 2016-08-02 Mesaplexx Pty Ltd Multi-mode filter
US9437910B2 (en) 2011-08-23 2016-09-06 Mesaplexx Pty Ltd Multi-mode filter
CN103715484A (en) * 2012-09-29 2014-04-09 四川奥格科技有限公司 Cavity filter improving temperature drift
US20140097913A1 (en) 2012-10-09 2014-04-10 Mesaplexx Pty Ltd Multi-mode filter
US9325046B2 (en) 2012-10-25 2016-04-26 Mesaplexx Pty Ltd Multi-mode filter
CN103000974B (en) * 2012-12-27 2015-09-02 北京航天测控技术有限公司 High-precision wideband adjustable X-band cavity body filter and method for designing
US9614264B2 (en) 2013-12-19 2017-04-04 Mesaplexxpty Ltd Filter
WO2016138918A1 (en) * 2015-03-02 2016-09-09 Telefonaktiebolaget Lm Ericsson (Publ) A temperature compensated waveguide device
CN108172954B (en) * 2018-02-01 2020-01-14 宁波泰立电子科技有限公司 Cavity radio frequency module inductive coupling rod subassembly with locking function
CN113131117B (en) * 2021-04-16 2022-04-15 西安电子科技大学 Temperature compensation screw applied to cavity filter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655392A (en) * 1946-07-26 1951-07-18 British Thomson Houston Co Ltd Improvements in and relating to temperature compensating mechanisms
US3528042A (en) * 1967-09-22 1970-09-08 Motorola Inc Temperature compensated waveguide cavity
FR2086065A1 (en) * 1970-04-14 1971-12-31 Mini Aviat Supply
FR2326077A1 (en) * 1975-09-25 1977-04-22 Cit Alcatel Temp. stabilised RF filter - has coupled resonant cavities each with tuning screw in holder outside cavity wall
JPS57157601A (en) * 1981-03-23 1982-09-29 Fujitsu Ltd Adjusting mechanism of microwave cubic circuit
EP0691702A2 (en) * 1994-07-07 1996-01-10 Com Dev Ltd. Multi-mode temperature compensated filters and a method of constructing and compensating therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655392A (en) * 1946-07-26 1951-07-18 British Thomson Houston Co Ltd Improvements in and relating to temperature compensating mechanisms
US3528042A (en) * 1967-09-22 1970-09-08 Motorola Inc Temperature compensated waveguide cavity
FR2086065A1 (en) * 1970-04-14 1971-12-31 Mini Aviat Supply
FR2326077A1 (en) * 1975-09-25 1977-04-22 Cit Alcatel Temp. stabilised RF filter - has coupled resonant cavities each with tuning screw in holder outside cavity wall
JPS57157601A (en) * 1981-03-23 1982-09-29 Fujitsu Ltd Adjusting mechanism of microwave cubic circuit
EP0691702A2 (en) * 1994-07-07 1996-01-10 Com Dev Ltd. Multi-mode temperature compensated filters and a method of constructing and compensating therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 6, no. 259 (E - 149)<1137> 17 December 1982 (1982-12-17) *

Also Published As

Publication number Publication date
CA2206942C (en) 1999-01-19
EP0883203A2 (en) 1998-12-09
CA2206942A1 (en) 1997-07-02

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