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FI20041546L - Temperature compensated resonator - Google Patents

Temperature compensated resonator Download PDF

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Publication number
FI20041546L
FI20041546L FI20041546A FI20041546A FI20041546L FI 20041546 L FI20041546 L FI 20041546L FI 20041546 A FI20041546 A FI 20041546A FI 20041546 A FI20041546 A FI 20041546A FI 20041546 L FI20041546 L FI 20041546L
Authority
FI
Finland
Prior art keywords
resonator
natural frequency
temperature
temperature compensation
dielectric
Prior art date
Application number
FI20041546A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20041546A7 (en
FI20041546A0 (en
Inventor
Jouni Ala-Kojola
Arttu Ollinaho
Original Assignee
Filtronic Comtek Oy
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 Filtronic Comtek Oy filed Critical Filtronic Comtek Oy
Priority to FI20041546A priority Critical patent/FI20041546A7/en
Publication of FI20041546A0 publication Critical patent/FI20041546A0/en
Priority to PCT/FI2005/050419 priority patent/WO2006058965A1/en
Publication of FI20041546L publication Critical patent/FI20041546L/en
Publication of FI20041546A7 publication Critical patent/FI20041546A7/en

Links

Classifications

    • 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

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

Abstract

A coaxial resonator provided with temperature compensation in order to control the changing of the natural frequency of the resonator when the temperature changes. The characteristic of dielectric materials that the temperature coefficient of their dielectric coefficient is negative is utilized in the solution. For the temperature compensation of the coaxial quarter-wave resonator (300), a dielectric piece (340) is placed in the resonator cavity, at the open end of the resonator. When the temperature rises, for example, the lowering of permittivity decreases the capacitance between the upper end of the inner conductor (320) of the resonator and the upper part of the resonator housing (310, 315, 330), in which case the electric length of the resonator decreases and the natural frequency becomes higher. This rise of the natural frequency is arranged to have the same value as the lowering of the natural frequency caused by the thermal expansion of the resonator structure. The temperature compensation of the resonator does not increase the possibility of intermodulation in the resonator because of the lack of metallic junctions, and does not significantly deteriorate the Q value of the resonator. The manufacturing costs of the structure are low and the reproducibility is good.
FI20041546A 2004-11-30 2004-11-30 Temperature compensated resonator FI20041546A7 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI20041546A FI20041546A7 (en) 2004-11-30 2004-11-30 Temperature compensated resonator
PCT/FI2005/050419 WO2006058965A1 (en) 2004-11-30 2005-11-17 Temperature-compensated resonator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20041546A FI20041546A7 (en) 2004-11-30 2004-11-30 Temperature compensated resonator

Publications (3)

Publication Number Publication Date
FI20041546A0 FI20041546A0 (en) 2004-11-30
FI20041546L true FI20041546L (en) 2006-05-31
FI20041546A7 FI20041546A7 (en) 2006-05-31

Family

ID=33515293

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20041546A FI20041546A7 (en) 2004-11-30 2004-11-30 Temperature compensated resonator

Country Status (2)

Country Link
FI (1) FI20041546A7 (en)
WO (1) WO2006058965A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8183960B2 (en) 2006-07-13 2012-05-22 Telefonaktiebolaget L M Ericsson (Publ) Trimming of waveguide filters
GB2448875B (en) * 2007-04-30 2011-06-01 Isotek Electronics Ltd A temperature compensated tuneable TEM mode resonator
ITMI20071276A1 (en) * 2007-06-26 2008-12-27 Andrew Telecomm Products S R L SYSTEM AND METHOD FOR TUNING MULTICAVITY FILTERS
GB0721361D0 (en) * 2007-10-30 2007-12-12 Radio Design Ltd Tunable filter
DE602008003968D1 (en) * 2008-01-28 2011-01-27 Alcatel Lucent Usa Inc Temperature compensated coaxial cavity resonator with anisotropic material
CN101916895A (en) * 2010-08-20 2010-12-15 深圳市大富科技股份有限公司 Cavity filter and manufacturing method thereof
FR2965668B1 (en) * 2010-10-01 2013-05-10 Thales Sa DIELECTRIC RESONATOR HYPERFREQUENCY FILTER
DE102012020979A1 (en) * 2012-10-25 2014-04-30 Kathrein-Werke Kg Tunable high frequency filter
EP3002594B1 (en) 2014-09-30 2019-06-05 3M Innovative Properties Company Voltage sensing device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100504A (en) * 1977-06-20 1978-07-11 Harris Corporation Band rejection filter having integrated impedance inverter-tune cavity configuration
JPS55100701A (en) * 1979-01-26 1980-07-31 Matsushita Electric Ind Co Ltd Coaxial resonator
JPS55135401A (en) * 1979-04-09 1980-10-22 Matsushita Electric Ind Co Ltd Coaxial type resonator
JPS62123801A (en) * 1985-11-25 1987-06-05 Matsushita Electric Ind Co Ltd Coaxial type filter
DE19917087C2 (en) * 1999-04-15 2001-07-26 Kathrein Werke Kg High frequency filter
FI119207B (en) * 2003-03-18 2008-08-29 Filtronic Comtek Oy Koaxialresonatorfilter
JP2004349823A (en) * 2003-05-20 2004-12-09 Murata Mfg Co Ltd Resonator device, filter, composite filter device, and communication apparatus

Also Published As

Publication number Publication date
FI20041546A7 (en) 2006-05-31
WO2006058965A1 (en) 2006-06-08
FI20041546A0 (en) 2004-11-30

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Legal Events

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PC Transfer of assignment of patent

Owner name: FILTRONIC COMTEK OY

Free format text: FILTRONIC COMTEK OY

FA Application withdrawn [patent]