EP1266423B1 - Resonateur a cavite a frequence de resonance reglable - Google Patents

Resonateur a cavite a frequence de resonance reglable Download PDF

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Publication number
EP1266423B1
EP1266423B1 EP01915592A EP01915592A EP1266423B1 EP 1266423 B1 EP1266423 B1 EP 1266423B1 EP 01915592 A EP01915592 A EP 01915592A EP 01915592 A EP01915592 A EP 01915592A EP 1266423 B1 EP1266423 B1 EP 1266423B1
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EP
European Patent Office
Prior art keywords
cavity
parts
cavity resonator
resonator
internal thread
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.)
Expired - Lifetime
Application number
EP01915592A
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German (de)
English (en)
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EP1266423A1 (fr
Inventor
Konstantin Beis
Uwe Rosenberg
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Ericsson AB
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Ericsson AB
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Publication date
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Publication of EP1266423A1 publication Critical patent/EP1266423A1/fr
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    • 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

Definitions

  • the present invention relates to a cavity resonator with tunable resonant frequency, which has a round cross-section and in which the Hlln-wave type (n is an integer positive number) exists as a resonant mode, wherein the distance between the two end faces of the cylindrical cavity is variable, the cavity with respect a cross-sectional plane is divided into two parts, both cavity parts against each other in the direction of their common longitudinal axis are displaceable and a cavity part with an external thread and the other cavity part is provided with an internal thread, so that both cavity parts with a variable distance of their end faces are screwed into one another.
  • a cavity resonator of this kind is in the JP-A-10303478 described.
  • Microwave filters with low losses are usually realized from a plurality of coupled cavity resonators.
  • means are required with which the individual cavity resonators are tunable in their resonance frequency.
  • the resonant frequency of a cavity resonator is tuned by changing its length. This is done according to the cited document in that a complete end face of the cylindrical cavity is slidably mounted.
  • Such a construction of frequency tunable cavity resonators also works " Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Matthaei, Young, Jones, McGraw-Hill, 1964, 921-923 out.
  • the displaceable end face of the cavity resonator is electrically connected via sliding contacts with the cavity wall.
  • a resonant cavity having such straightening devices has a relatively high insertion loss; this means that with such a cavity resonator no high quality can be achieved.
  • the invention is therefore based on the object of specifying a cavity resonator of the type mentioned, which has a large frequency sweeping range and thereby has the highest possible quality in order to realize filters with very low insertion loss, which can be tuned over a wide frequency range.
  • a cross-sectional plane is selected as the separating plane between the two cavity parts, which is approximately in the range of a maximum of the electric field strength of the H11n wave type, wherein the gap required in the parting plane between the two cavity parts as laid and is dimensioned that it is symmetrical to the maximum of the electric field strength, when the depth of engagement of the externally threaded cavity portion corresponds to a vote of the cavity on its average frequency position.
  • the two mutually displaceable in the axial direction cavity parts affect the quality of the cavity resonator only insignificantly.
  • a resonant frequency tunable resonator can be realized, which has a very high quality and thus allows the realization of a filter with a very low insertion loss.
  • a cavity part with an external thread and the other cavity part is provided with an internal thread, so that both cavity parts with a variable distance of their end faces are screwed together, creates an advantageous mechanical and electrical connection between the two cavity parts.
  • the cavity part provided with the internal thread in the region of the parting plane has a shoulder with an enlarged inner diameter, on the inside of which the internal thread is located. With this measure it is achieved that the inner cross sections of both cavity parts are the same size.
  • a longitudinal section through a cylindrical cavity resonator is shown.
  • the cavity resonator with respect to its cross-sectional dimensions is dimensioned so that in him the H112-wave type exists as a resonance wave type.
  • the cavity part 1 is the first end face 3 of the cylindrical cavity resonator and the cavity part 2 has the opposite end face 4 of the cavity resonator.
  • Frequency tuning of the cavity resonator is made possible by the distance between the two end faces 3 and 4 in the direction of the cavity resonator longitudinal axis z is variable.
  • the distribution of the electric field strength of the H112 wave type in the cavity resonator with respect to its longitudinal axis z is shown.
  • the parting plane 5 between the two cavity parts 1 and 2 has been placed in such a cross-sectional plane of the cavity resonator, in which there is a maximum of the electric field strength E.
  • this division of the cavity resonator of the lower cavity part 1 forms about 3/4 and the upper cavity part 2 about 1/4 of the entire cavity.
  • a mutual axial displacement of the two cavity parts 1 and 2 for the purpose of frequency tuning is achieved in that one of the two cavity parts, here the cavity part 1 on the inside of its open end with an internal thread 6 and the other cavity part 2 at its open end on the outside is provided with an external thread 7.
  • the cavity part 1 has at its open end a paragraph 8 with an opposite the normal cavity cross-section enlarged inner diameter, and on the inside of this paragraph 8 is the internal thread 6.
  • the waveguide part 2 in-this paragraph 8 are screwed into, so that Cavity part 2 can retain the same dimensions of its inner cross section as the cavity part 1.
  • the required in the parting plane 5 between the two cavity parts 1 and 2 gap is so laid and dimensioned that it is symmetrical to the maximum of the electric field strength E, when the depth of engagement of the cavity part 2 corresponds to a vote of the cavity on its average frequency position.
  • the separation gap would be nearly closed, while it is greatest when tuning to the lowest frequency position.
  • the resonance mode H11n can be tuned over a frequency range of about 10%.
  • the separation gap can be up to about 0.1 times the corresponding waveguide wavelength of the resonant mode, without an effect on the quality can be seen, since at this separation gap size almost no wall currents flow through the separation point and thus no energy coupled into the gap becomes.
  • the cavity part 2 has at the bottom, in the cavity part 1 projecting end an undercut 9, which serves to compensate for tolerances between the two parts. An electric meaning has this undercut 9 not.
  • a coupling opening 10 is embedded with an inductive coupling diaphragm 11, via which the coupling of a further cavity resonator can take place.
  • Other coupling devices are possible, for. B. in the cavity resonating probes, which couple the electric field components.
  • inductive coupling diaphragms and on Scope of the cavity resonator existing inductive coupling diaphragms, which couple the transverse magnetic field components (Hr and / or H ⁇ ) and are arranged at positions with almost maximum field strength of the corresponding field component, are possible.
  • the resonant mode H11n used here is degenerate at 90 °, two resonant circuits can be realized by the degenerate modes of a geometric cavity and simultaneously tuned with the device described above. As a result, the overall size of a filter as well as the cost of an active Bacabstimmvorraum is substantially reduced.
  • the coupling of the dual modes in the cavity can be performed in a known manner with discontinuities - usually screws, which are made at 45 ° with respect to the orientation of the electric field components of the dual modes on the circumference of the cylindrical cavity.
  • a basic correction of the frequency positions of the two wave types are performed to each other, which is usually necessary in a filter realization due to different coupling loads.

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

Claims (2)

  1. Résonateur à cavité avec fréquence de résonance accordable, qui présente une section ronde et dans lequel le type d'onde H11n est présent à type d'onde de résonance, dans lequel la distance des deux faces frontales de la cavité de forme cylindrique est modifiable et la cavité est subdivisée en deux par rapport à un plan de section transversale (5), les deux parties de cavité (1, 2) sont déplaçables l'une par rapport à l'autre en direction de leur axe longitudinal commun (z) et une partie de cavité (2) est pourvue d'un filetage extérieur (7) et l'autre partie de cavité (1) est pourvue d'un taraudage intérieur (6), de sorte que les deux parties de cavité (1, 2) sont susceptibles d'être vissées l'une dans l'autre avec modification de la distance de leurs faces frontales (3, 4),
    caractérisé en ce que
    à titre de plan de séparation (5) entre les deux parties de cavité (1, 2), il est choisi un plan de section transversale qui se trouve approximativement dans la région d'un maximum de l'intensité de champ électrique (E) du type d'onde H11n, et l'intervalle nécessaire dans le plan de séparation (5) entre les deux parties de cavité (1, 2) est disposé et dimensionné de telle façon qu'il est situé symétriquement par rapport au maximum de l'intensité de champ électrique (E) quand la profondeur de vissage de la partie de cavité (2) dotée du filetage extérieur (7) correspond à un accord du résonateur à cavité à sa disposition à fréquence moyenne.
  2. Résonateur à cavité selon la revendication 1, caractérisé en ce que la partie de cavité (1) pourvue du taraudage intérieur (6) présente dans la région du plan de séparation (5) un talon (8) avec diamètre intérieur agrandi, sur la face intérieure duquel se trouve le taraudage intérieur (6).
EP01915592A 2000-03-07 2001-02-23 Resonateur a cavite a frequence de resonance reglable Expired - Lifetime EP1266423B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10010967A DE10010967A1 (de) 2000-03-07 2000-03-07 Hohlraumresonator mit abstimmbarer Resonanzfrequenz
DE10010967 2000-03-07
PCT/IB2001/000431 WO2001067543A1 (fr) 2000-03-07 2001-02-23 Resonateur a cavite a frequence de resonance reglable

Publications (2)

Publication Number Publication Date
EP1266423A1 EP1266423A1 (fr) 2002-12-18
EP1266423B1 true EP1266423B1 (fr) 2008-07-23

Family

ID=7633763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01915592A Expired - Lifetime EP1266423B1 (fr) 2000-03-07 2001-02-23 Resonateur a cavite a frequence de resonance reglable

Country Status (6)

Country Link
US (1) US7012488B2 (fr)
EP (1) EP1266423B1 (fr)
CN (1) CN1416605A (fr)
AU (1) AU2001242674A1 (fr)
DE (2) DE10010967A1 (fr)
WO (1) WO2001067543A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE516862C2 (sv) * 2000-07-14 2002-03-12 Allgon Ab Avstämningsskruvanordning samt metod och resonator
WO2009027720A1 (fr) * 2007-08-31 2009-03-05 Bae Systems Plc Oscillateurs résonants diélectriques à faibles vibrations
EP2410823B1 (fr) * 2010-07-22 2012-11-28 Ion Beam Applications Cyclotron apte à accélérer au moins deux types de particules
RU2483386C2 (ru) * 2011-08-29 2013-05-27 Открытое акционерное общество "Научно-производственное предприятие "Контакт" Мощный широкополосный клистрон
US9178256B2 (en) 2012-04-19 2015-11-03 Qualcomm Mems Technologies, Inc. Isotropically-etched cavities for evanescent-mode electromagnetic-wave cavity resonators
US8884725B2 (en) * 2012-04-19 2014-11-11 Qualcomm Mems Technologies, Inc. In-plane resonator structures for evanescent-mode electromagnetic-wave cavity resonators
EP3788673A1 (fr) 2018-05-04 2021-03-10 Telefonaktiebolaget LM Ericsson (publ) Résonateur en guide d'ondes accordable
EP3660977B1 (fr) * 2018-11-30 2023-12-13 Nokia Solutions and Networks Oy Résonateur pour signaux de fréquence radio

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771074A (en) 1972-03-20 1973-11-06 Nasa Tunable cavity resonator with ramp shaped supports
US5712605A (en) 1994-05-05 1998-01-27 Hewlett-Packard Co. Microwave resonator
JPH10303478A (ja) 1997-04-30 1998-11-13 Nec Corp ルビジウム原子発振器用キャビティ
US6118356A (en) * 1998-09-16 2000-09-12 Hughes Electronics Corporation Microwave cavity having a removable end wall

Also Published As

Publication number Publication date
CN1416605A (zh) 2003-05-07
AU2001242674A1 (en) 2001-09-17
US20030102943A1 (en) 2003-06-05
DE50114148D1 (de) 2008-09-04
EP1266423A1 (fr) 2002-12-18
US7012488B2 (en) 2006-03-14
DE10010967A1 (de) 2001-09-13
WO2001067543A1 (fr) 2001-09-13

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