EP0492304A1 - Dispositif d'accord des résonateurs diélectriques à haute fréquence et résonateurs ainsi obtenus - Google Patents

Dispositif d'accord des résonateurs diélectriques à haute fréquence et résonateurs ainsi obtenus Download PDF

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Publication number
EP0492304A1
EP0492304A1 EP91121338A EP91121338A EP0492304A1 EP 0492304 A1 EP0492304 A1 EP 0492304A1 EP 91121338 A EP91121338 A EP 91121338A EP 91121338 A EP91121338 A EP 91121338A EP 0492304 A1 EP0492304 A1 EP 0492304A1
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EP
European Patent Office
Prior art keywords
resonator
dielectric
tuning
frequency
diameter
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.)
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EP91121338A
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German (de)
English (en)
Inventor
Goffredo Modena
Giuseppe Dell'era
Vittorio Tansini
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FOR E M SpA
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FOR E M SpA
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Publication date
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Publication of EP0492304A1 publication Critical patent/EP0492304A1/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
    • H01P7/10—Dielectric resonators

Definitions

  • the system according to the invention for tuning high-frequency dielectric resonators, resonating in the mode TEo1 in frequency fields e.g. from 400 MHz to 20 GHz, preferably from 900 to 4000 MHz, makes the coupling by means of the penetration of at least a male dielectric M having an external diameter "d" into a female resonator F having a diameter D and height H: in an embodiment, for getting the variations e.g. from 4 to 5% of the tuning frequency in the mode TEo1 within the band from 925 to 970 MHz, the ratio d/D is included between 0.4 and 0.8 and the axial coupling or penetration p/H is included between 0.3 and 0.7 where h is the part of M engaged axially in F.
  • the present invention refers to a tuning system for high frequency dielectric resonators, in particular resonators working in the mode TEo1 from 400 MHz to 20,000 preferably from 925 to 970 MHz, in which system the tuning is obtained substantially by changing the penetration of a male resonator into a female resonator.
  • the invention includes also the resonators obtained by the considered system, including generally:
  • the tuning plays an important function, in particular the tuning obtained by means of resonators including substantially resonant cavities. These last ones have originated the dielectric resonators obtained by the insertion into the cavity of at least a dielectric body generally having a cylindrical form and high values of dielectric constant and low values of the thermal expansion coefficient.
  • the high dielectric constant allows to miniaturize the resonators and therefore to work at frequencies included in the order of 1 GHz, for which frequencies the low air-loss resonators are too cumbersome.
  • the great thermal stability is necessary for using the resonators in the very selective filters required by the great crowd of the frequency bands.
  • the resonators of the described type must be tuned in large frequency bands, in the inside of which the influence caused by the temperature onto the tuning members must be controlled. As these last members are anchored to an envelope that, owing to price reasons, cannot have a high stability, the problem arises of adjusting the tuning with the aid of means through which it is possible to exert a same influence on all frequencies of the tuning range notwithstanding the temperature variations. In fact only acting in this manner it is possible to make the thermal compensation in all frequencies of the tuning range.
  • the Figures 2 and 3 refer the schematic section of this experimental cavity, respectively the penetration diagram of rod/tuning frequency (as shown in Figures 1 and 3 of said work).
  • the diagram shows that it is not possible to have frequency variations in the band of f.i. from 5 to 10 GHz in the modes TEo1, TEo2, HEM11, HEM12, HEM21, HEM13, HEM22 and HEM14.
  • the first scope of the invention is to provide a system that prevents the above mentioned drawbacks.
  • Another scope is to provide a system that allows to get a "maximum maximorum" value in the main characteristics of a dielectric resonator, in particular a high linearity of the tuning frequency in function of the coupling between dielectric bodies, a compensation of the thermal expansion of the envelope (including screws and supports) substantially constant at all tuning frequencies and a greater miniaturization.
  • Figure 4 is a schematical partial section view (similar to Figure 1) of a resonating cavity in the mode TEo1, particularly simple according to the invention
  • Figure 4' is a section view as Figure 4, but in enlaged scale for the sole resonators
  • Figures 5 and 6 are curves indicating the variation of the ratio ⁇ Fs/Fs, i.e. is the percentage relative variation of the tuning frequency Fs, in function of the ratio p/H (percentage relative penetration) ( Figure 5), respectively of the ratio d/D where d ⁇ D is the diameter of the little resonator.
  • the resonant cavity in the mode TEo1 includes two dielectric resonators, a first resonator Dm is now male and the second resonator Df is female. (In opposition to the Figure 1 in which the two resonators are not interpenetrated and always parallel with one another and in oppostion to Figure 2, in which the mode TEo1 is excluded).
  • the first resonator Df (in axial schematic section) is U-shaped and is closed at one end or bottom 7, has an external diameter D and a height H from the bottom 7.
  • the male body Dm has a diameter d ⁇ D, and a penetration "p" into Df, that expressed in relative terms becomes p/H.
  • the diagram of Figure 5 shows the curves ⁇ Fs/Fs in function of p/H (abscissas) for different values of the ratio d/D.
  • Figure 6 shows the variation of ⁇ Fs/Fs% in function of d/D (for a fixed value of p/H equal to 0.5): it can be seen that the variation ⁇ Fs/Fs from 4 to 5% is accentuated and concentrated for d/D included between 0.4 and 0.8, with its maximum being at 0.6.
  • the device of Figure 1 allows an easy modification of Fs along the whole operative band changing the distance Lc between the two dielectric resonators.
  • the variation is unlinear on said whole band and depends on the absolute value of Fs.
  • the larger face 7 of DF must still respect the minimum distance L2min from the face 15 of the cavity CA, the face with very reduced diameter "dri" of DM is now substantially uninfluent on the losses that can be caused by its proximity to the wall 16 of the cavity CA.
  • the metallic part is made of aluminium and its alloys
  • the dielectric parts are made of materials available on the market and in particular the materials referred to e.g. in the catalogue NTK Microwave Dielectric Components page 2, that is purposely here mentioned also becouse at page 3 it refers images of dielectrics of the cylindrical type, drilled centrally along the whole axis (and with a crown having a diameter wider than the hole onlyon a little axial part). The hole has here the scope of preventing the deterioration of Q and improves the spurious responses.

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EP91121338A 1990-12-28 1991-12-12 Dispositif d'accord des résonateurs diélectriques à haute fréquence et résonateurs ainsi obtenus Withdrawn EP0492304A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2255790 1990-12-28
IT02255790A IT1246747B (it) 1990-12-28 1990-12-28 Sistema per sintonizzare risonatori dielettrici ad alta frequenza e risonatori cosi ottenuti.

Publications (1)

Publication Number Publication Date
EP0492304A1 true EP0492304A1 (fr) 1992-07-01

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EP91121338A Withdrawn EP0492304A1 (fr) 1990-12-28 1991-12-12 Dispositif d'accord des résonateurs diélectriques à haute fréquence et résonateurs ainsi obtenus

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EP (1) EP0492304A1 (fr)
IT (1) IT1246747B (fr)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5206612A (en) * 1990-12-28 1993-04-27 For.E.M. S.P.A. System for combining high frequency signals
GB2261556A (en) * 1991-11-01 1993-05-19 Murata Manufacturing Co Adjusting resonance frequency of dielectric resonator
US5311157A (en) * 1990-12-28 1994-05-10 Forem S.P.A. System for filtering signals of high and low frequency bands, and relevant implementation device
DE4241027A1 (de) * 1992-12-05 1994-06-09 Ant Nachrichtentech Abstimmbarer dielektrischer Resonator
DE4316334A1 (de) * 1993-05-15 1994-11-17 Forschungsgesellschaft Fuer In Dielektrischer Resonator
EP0755089A1 (fr) * 1995-07-20 1997-01-22 SIEMENS MATSUSHITA COMPONENTS GmbH & CO. KG Résonateur diélectrique
US5831490A (en) * 1995-07-03 1998-11-03 Nokia Telecommunications Oy Method and apparatus for tuning a base station summing network having at least two transmitter branches
WO1999036982A2 (fr) * 1998-01-15 1999-07-22 K & L Microwave, Inc. Filtres de ceramique accordables
WO1999066583A2 (fr) * 1998-06-18 1999-12-23 National Scientific Corp. Resonateur dielectrique
US6222428B1 (en) * 1999-06-15 2001-04-24 Allgon Ab Tuning assembly for a dielectrical resonator in a cavity
US6545571B2 (en) 2001-09-12 2003-04-08 El-Badawy Amien El-Sharawy Tunable HEογδ mode dielectric resonator
EP1575118A1 (fr) * 2004-03-12 2005-09-14 M/A-Com, Inc. Méthode et mécanisme pour accorder des circuits de résonateurs diélectriques
US7088203B2 (en) 2004-04-27 2006-08-08 M/A-Com, Inc. Slotted dielectric resonators and circuits with slotted dielectric resonators
US7183881B2 (en) 2002-09-17 2007-02-27 M/A-Com, Inc. Cross-coupled dielectric resonator circuit
US7310031B2 (en) 2002-09-17 2007-12-18 M/A-Com, Inc. Dielectric resonators and circuits made therefrom
US7352264B2 (en) 2005-10-24 2008-04-01 M/A-Com, Inc. Electronically tunable dielectric resonator circuits
US7388457B2 (en) 2005-01-20 2008-06-17 M/A-Com, Inc. Dielectric resonator with variable diameter through hole and filter with such dielectric resonators
US7456712B1 (en) 2007-05-02 2008-11-25 Cobham Defense Electronics Corporation Cross coupling tuning apparatus for dielectric resonator circuit
US7583164B2 (en) 2005-09-27 2009-09-01 Kristi Dhimiter Pance Dielectric resonators with axial gaps and circuits with such dielectric resonators
US7705694B2 (en) 2006-01-12 2010-04-27 Cobham Defense Electronic Systems Corporation Rotatable elliptical dielectric resonators and circuits with such dielectric resonators
US7719391B2 (en) 2006-06-21 2010-05-18 Cobham Defense Electronic Systems Corporation Dielectric resonator circuits
CN103296370A (zh) * 2012-02-29 2013-09-11 深圳光启创新技术有限公司 谐振腔
DE102019105941A1 (de) * 2019-03-08 2020-09-10 Tesat-Spacecom Gmbh & Co.Kg Resonator mit Temperaturkompensation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2534088A1 (fr) * 1982-10-01 1984-04-06 Murata Manufacturing Co Resonateur dielectrique

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2534088A1 (fr) * 1982-10-01 1984-04-06 Murata Manufacturing Co Resonateur dielectrique

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
FREQUENZ. vol. 39, no. 1/2, February 1985, BERLIN DE pages 45 - 49; U.CROMBACH ET AL.: 'Abstimmbare dielektrische Ringresonatoren' *
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES. vol. 17, no. 7, July 1969, NEW YORK US pages 354 - 359; M.A.GERDINE: 'A frequency-stabilized microwave band-rejection filter using high dielectric constant resonators' *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 248 (E-347)(1971) 4 October 1985 & JP-A-60 098 703 ( MITSUBISHI DENKI K.K. ) 1 June 1985 *
SOVIET PATENTS ABSTRACTS Section EI, Week 8502, 20 February 1985 Derwent Publications Ltd., London, GB; Class W, AN 85-010541/02 & SU-A-1 092 621 (PISARENKO) 15 May 1984 *

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5311157A (en) * 1990-12-28 1994-05-10 Forem S.P.A. System for filtering signals of high and low frequency bands, and relevant implementation device
US5206612A (en) * 1990-12-28 1993-04-27 For.E.M. S.P.A. System for combining high frequency signals
GB2261556A (en) * 1991-11-01 1993-05-19 Murata Manufacturing Co Adjusting resonance frequency of dielectric resonator
GB2261556B (en) * 1991-11-01 1996-03-20 Murata Manufacturing Co Mechanism for adjusting resonance frequency of dielectric resonator
DE4241027A1 (de) * 1992-12-05 1994-06-09 Ant Nachrichtentech Abstimmbarer dielektrischer Resonator
DE4316334A1 (de) * 1993-05-15 1994-11-17 Forschungsgesellschaft Fuer In Dielektrischer Resonator
US5831490A (en) * 1995-07-03 1998-11-03 Nokia Telecommunications Oy Method and apparatus for tuning a base station summing network having at least two transmitter branches
EP0755089A1 (fr) * 1995-07-20 1997-01-22 SIEMENS MATSUSHITA COMPONENTS GmbH & CO. KG Résonateur diélectrique
WO1999036982A2 (fr) * 1998-01-15 1999-07-22 K & L Microwave, Inc. Filtres de ceramique accordables
US6147577A (en) * 1998-01-15 2000-11-14 K&L Microwave, Inc. Tunable ceramic filters
WO1999036982A3 (fr) * 1998-01-15 2003-05-08 K & L Microwave Inc Filtres de ceramique accordables
WO1999066583A2 (fr) * 1998-06-18 1999-12-23 National Scientific Corp. Resonateur dielectrique
US6169467B1 (en) 1998-06-18 2001-01-02 El-Badawy Amien El-Sharawy Dielectric resonator comprising a dielectric resonator disk having a hole
WO1999066583A3 (fr) * 1998-06-18 2001-11-08 Nat Scient Corp Resonateur dielectrique
US6222428B1 (en) * 1999-06-15 2001-04-24 Allgon Ab Tuning assembly for a dielectrical resonator in a cavity
US6545571B2 (en) 2001-09-12 2003-04-08 El-Badawy Amien El-Sharawy Tunable HEογδ mode dielectric resonator
US7183881B2 (en) 2002-09-17 2007-02-27 M/A-Com, Inc. Cross-coupled dielectric resonator circuit
US7310031B2 (en) 2002-09-17 2007-12-18 M/A-Com, Inc. Dielectric resonators and circuits made therefrom
US7352263B2 (en) 2004-03-12 2008-04-01 M/A-Com, Inc. Method and mechanism for tuning dielectric resonator circuits
EP1575118A1 (fr) * 2004-03-12 2005-09-14 M/A-Com, Inc. Méthode et mécanisme pour accorder des circuits de résonateurs diélectriques
US7088203B2 (en) 2004-04-27 2006-08-08 M/A-Com, Inc. Slotted dielectric resonators and circuits with slotted dielectric resonators
US7388457B2 (en) 2005-01-20 2008-06-17 M/A-Com, Inc. Dielectric resonator with variable diameter through hole and filter with such dielectric resonators
US7583164B2 (en) 2005-09-27 2009-09-01 Kristi Dhimiter Pance Dielectric resonators with axial gaps and circuits with such dielectric resonators
US7352264B2 (en) 2005-10-24 2008-04-01 M/A-Com, Inc. Electronically tunable dielectric resonator circuits
US7705694B2 (en) 2006-01-12 2010-04-27 Cobham Defense Electronic Systems Corporation Rotatable elliptical dielectric resonators and circuits with such dielectric resonators
US7719391B2 (en) 2006-06-21 2010-05-18 Cobham Defense Electronic Systems Corporation Dielectric resonator circuits
US7456712B1 (en) 2007-05-02 2008-11-25 Cobham Defense Electronics Corporation Cross coupling tuning apparatus for dielectric resonator circuit
CN103296370A (zh) * 2012-02-29 2013-09-11 深圳光启创新技术有限公司 谐振腔
DE102019105941A1 (de) * 2019-03-08 2020-09-10 Tesat-Spacecom Gmbh & Co.Kg Resonator mit Temperaturkompensation
US11424523B2 (en) 2019-03-08 2022-08-23 Tesat-Spacecom Gmbh & Co. Kg Resonator with temperature compensation

Also Published As

Publication number Publication date
IT9022557A0 (it) 1990-12-28
IT9022557A1 (it) 1992-06-29
IT1246747B (it) 1994-11-26

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