EP0601369A1 - Adjustable dielectric resonator - Google Patents

Adjustable dielectric resonator Download PDF

Info

Publication number
EP0601369A1
EP0601369A1 EP93118715A EP93118715A EP0601369A1 EP 0601369 A1 EP0601369 A1 EP 0601369A1 EP 93118715 A EP93118715 A EP 93118715A EP 93118715 A EP93118715 A EP 93118715A EP 0601369 A1 EP0601369 A1 EP 0601369A1
Authority
EP
European Patent Office
Prior art keywords
dielectric
resonator
recess
dielectric body
housing
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.)
Ceased
Application number
EP93118715A
Other languages
German (de)
French (fr)
Inventor
Uwe Dipl.-Ing. Rosenberg
Konstantin Dipl.-Ing. Beis
Michael Dipl.-Ing. Knipp
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
ANT Nachrichtentechnik GmbH
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 Robert Bosch GmbH, ANT Nachrichtentechnik GmbH filed Critical Robert Bosch GmbH
Publication of EP0601369A1 publication Critical patent/EP0601369A1/en
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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 invention is based on a tunable dielectric resonator according to the preamble of patent claim 1.
  • Such a tunable dielectric resonator is known from Patent Abstracts of Japan E-22, August 20, 1980, Vol. 4 / No. 117 known.
  • the dielectric body which can be immersed in the eccentric recess of the dielectric resonator is held here by a screw, which likewise consists of a dielectric material. This arrangement does not ensure sufficient dissipation of the heat from the dielectric resonator to the outside of the housing.
  • a tunable dielectric resonator which has a central bore into which a conical body can be immersed.
  • the resonance frequency can only be tuned over a narrow frequency range.
  • the latter is clamped between two metal disks which are in contact with the walls of a housing which accommodates the dielectric resonator.
  • resulting tunable dielectric resonator consists of a dielectric hollow cylinder, in the inner wall of which dielectric bodies can be countersunk in the radial direction.
  • the invention is based on the object of specifying a tunable dielectric resonator of the type mentioned at the outset, which can be tuned over the widest possible frequency range and which is provided with simple means for dissipating heat from the dielectric.
  • the dielectric body responsible for frequency tuning has a small volume or mass, which has an advantageous effect on a tuning mechanism.
  • a metallic holder can be used without having to accept a significant reduction in the resonator quality, which enables good heat dissipation from the dielectric body.
  • the housing 1 shows a tunable dielectric resonator with a dielectric arranged in a housing 1, for example in the form of a cylinder 2.
  • the housing 1 and the dielectric are Cylinder 2 circular.
  • the circular shape is not binding for the function of the resonator, for example rectangular, triangular, elliptical etc.
  • dielectric cylinders can also be used in, for example, round rectangular, elliptical etc. housings.
  • the dielectric cylinder 2 is held in the housing 1, for example on a ceramic disk 3.
  • a recess 4 is provided in the dielectric cylinder 2, into which a dielectric body 5 can be immersed.
  • the resonance frequency of the resonator depends on the immersion depth.
  • the recess 4 is arranged outside the center of the dielectric cylinder in an area in which the electric field strength e.g. of the TE 01 ⁇ wave mode has a maximum. This allows a large tuning range to be achieved with a relatively small-volume dielectric body 5.
  • the position of the recess 4 also ensures that the magnetic field lines are oriented almost perpendicular to a metal rod 6 guiding the dielectric body 4.
  • the dielectric body 5 is guided in the recess 4 parallel to the longitudinal axis of the dielectric cylinder 2. Accordingly, the metal rod serving as a holder is also 6 directed.
  • the recess 7 is segment-shaped, so that a correspondingly shaped dielectric body 8 dips into the recess 7 laterally, that is to say perpendicular to the longitudinal axis of the cylinder 2.
  • the dielectric body 8 which tunes the frequency is also in this embodiment in a region of the dielectric cylinder where the electric field strength has a maximum. Then, just as in the exemplary embodiment in FIG.
  • the magnetic field lines run almost perpendicular to a holder 9 connected to the dielectric body 8, which is oriented orthogonally to the longitudinal axis of the dielectric cylinder 1. This also provides the prerequisites for using a metallic holder 9 which effects good heat dissipation without the quality of the resonator suffering.

Landscapes

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

Abstract

The resonator has a dielectric cylinder (2) arranged in a housing (1) and a dielectric body (5) which can be inserted into a recess (4) of the cylinder (2), the insertion depth of the dielectric body (5), on which the resonant frequency of the resonator depends, being adjustable by means of a support (6) which is fastened on the dielectric body (5) and extends outside the housing (1). The recess (4) is arranged off-centre in the dielectric cylinder (2), to be precise at a location where the electric field strength is as high as possible. Under these conditions, a support (6) made of metal can be used, without the quality of the resonator being thereby detrimentally affected. <IMAGE>

Description

Die Erfindung geht aus von einem abstimmbaren dielektrischen Resonator nach dem Oberbegriff des Patentanspruchs 1.The invention is based on a tunable dielectric resonator according to the preamble of patent claim 1.

Ein derartiger abstimmbarer dielektrischer Resonator ist aus den Patent Abstracts of Japan E-22, August 20, 1980, Vol. 4/No. 117 bekannt. Der in die exzentrische Aussparung des dielektrischen Resonators eintauchbare dielektrische Körper wird hier von einer Schraube gehalten, die ebenfalls aus einem dielektrischen Material besteht. Diese Anordnung sorgt nicht für eine ausreichende Abfuhr der Wärme aus dem dielektrischen Resonator nach außen an das Gehäuse.Such a tunable dielectric resonator is known from Patent Abstracts of Japan E-22, August 20, 1980, Vol. 4 / No. 117 known. The dielectric body which can be immersed in the eccentric recess of the dielectric resonator is held here by a screw, which likewise consists of a dielectric material. This arrangement does not ensure sufficient dissipation of the heat from the dielectric resonator to the outside of the housing.

Aus der GB 2 183 928 A ist ein abstimmbarer dielektrischer Resonator bekannt, der eine zentrale Bohrung aufweist, in die ein konischer Körper eintauchbar ist. Mit einer solchen Abstimmanordnung kann die Resonanzfrequenz nur über einen schmalen Frequenzbereich abgestimmt werden. Um die Wärme aus dem dielektrischen Resonator abzuführen, ist dieser zwischen zwei Metallscheiben eingeklemmt, die mit den Wänden eines den dielektrischen Resonator aufnehmenden Gehäuses kontaktiert sind.From GB 2 183 928 A a tunable dielectric resonator is known which has a central bore into which a conical body can be immersed. With such a tuning arrangement, the resonance frequency can only be tuned over a narrow frequency range. In order to remove the heat from the dielectric resonator, the latter is clamped between two metal disks which are in contact with the walls of a housing which accommodates the dielectric resonator.

Ein aus den Patent Abstracts of Japan E-608, May 13, 1988, Vol. 12/No. 158 hervorgehender abstimmbarer dielektrischer Resonator besteht aus einem dielektrischen Hohlzylinder, in dessen Innenwand in radialer Richtung dielektrische Körper versenkbar sind.One from Patent Abstracts of Japan E-608, May 13, 1988, Vol. 12 / No. 158 resulting tunable dielectric resonator consists of a dielectric hollow cylinder, in the inner wall of which dielectric bodies can be countersunk in the radial direction.

Der Erfindung liegt nun die Aufgabe zugrunde, einen abstimmbaren dielektrischen Resonator der eingangs genannten Art anzugeben, der über einen möglichst breiten Frequenzbereich durchstimmbar ist und der mit einfachen Mitteln zur Abführung von Wärme aus dem Dielektrium versehen ist.The invention is based on the object of specifying a tunable dielectric resonator of the type mentioned at the outset, which can be tuned over the widest possible frequency range and which is provided with simple means for dissipating heat from the dielectric.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausbildungen der Erfindung gehen aus den Unteransprüchen hervor.According to the invention, this object is achieved by the features of claim 1. Advantageous developments of the invention emerge from the subclaims.

Der für die Frequenzdurchstimmung zuständige dielektrische Körper weist aufgrund der Erfindung ein geringes Volumen bzw. eine geringe Masse auf, was sich vorteilhaft für einen Abstimmechanismus auswirkt.Due to the invention, the dielectric body responsible for frequency tuning has a small volume or mass, which has an advantageous effect on a tuning mechanism.

Bei der gemäß der Erfindung gewählten Lage für den die Frequenz abstimmenden dielektrischen Körper kann, ohne eine merkliche Reduzierung der Resonatorgüte in Kauf nehmen zu müssen, eine metallische Halterung verwendet werden, welche eine gute Wärmeableitung aus dem dielektrischen Körper ermöglicht.In the position chosen according to the invention for the frequency-tuning dielectric body, a metallic holder can be used without having to accept a significant reduction in the resonator quality, which enables good heat dissipation from the dielectric body.

Anhand zweier in der Zeichnung dargestellter Ausführungsbeispiele wird nun die Erfindung näher erläutert.
Es zeigen

  • Fig.1 einen dielektrischen Resonator mit einer in Richtung der Resonatorlängsachse orientierten Abstimmung und
  • Fig.2 einen dielektrischen Resonator mit einer in Richtung quer zur Resonatorlängsachse orientierten Abstimmung.
The invention will now be explained in more detail with reference to two exemplary embodiments shown in the drawing.
Show it
  • 1 shows a dielectric resonator with a tuning oriented in the direction of the longitudinal axis of the resonator and
  • 2 shows a dielectric resonator with a tuning oriented in the direction transverse to the longitudinal axis of the resonator.

In der Fig.1 ist ein abstimmbarer dielektrischer Resonator dargestellt mit einem in einem Gehäuse 1 angeordneten Dielektrikum, z.B. in Form eines Zylinders 2. Bei diesem Ausführungsbeispiel sind das Gehäuse 1 und der dielektrische Zylinder 2 kreisförmig. Die Kreisform ist aber für die Funktion des Resonators nicht bindend, so sind z.B. auch rechteckige, dreieckige, elliptische etc. dielektrische Zylinder in z.B. runde rechteckige, elliptische etc. Gehäuse einsetzbar. In dem Gehäuse 1 wird der dielektrische Zylinder 2 beispielsweise auf einer Keramikscheibe 3 gehalten.1 shows a tunable dielectric resonator with a dielectric arranged in a housing 1, for example in the form of a cylinder 2. In this exemplary embodiment, the housing 1 and the dielectric are Cylinder 2 circular. However, the circular shape is not binding for the function of the resonator, for example rectangular, triangular, elliptical etc. dielectric cylinders can also be used in, for example, round rectangular, elliptical etc. housings. The dielectric cylinder 2 is held in the housing 1, for example on a ceramic disk 3.

In dem dielektrischen Zylinder 2 ist eine Aussparung 4 vorgesehen, in die ein dielektrischer Körper 5 eintauchbar ist. Von der Eintauchtiefe hängt die Resonanzfrequenz des Resonators ab. Die Aussparung 4 ist außerhalb des Zentrums des dielektrischen Zylinders in einem Bereich angeordnet, in dem die elektrische Feldstärke z.B. des TE 01δ Wellenmodus ein Maximum besitzt. Dadurch läßt sich mit einem relativ kleinvolumigen dielektrischen Köper 5 ein großer Durchstimmbereich realisieren. Die Lage der Aussparung 4 gewährleistet außerdem, daß hier die magnetischen Feldlinien nahezu senkrecht zu einem den dielektrischen Körper 4 führenden Metallstab 6 orientiert sind. Der Metallstab 6, welcher mit dem dielektrischen Körper 4 verbunden und andererseits aus dem Gehäuse 1 herausgeführt ist, dient als Halterung, mit der die Eintauchtiefe des dielektrischen Körpers 2 einstellbar ist. Wegen der orthogonalen Orientierung der magnetischen Feldlinien zu der Halterung 6 werden darin kaum Ströme induziert, auch wenn die Halterung 6 aus Metall besteht. Somit beeinflußt die Halterung in der beschriebenen Position die Güte des Resonators nur unwesentlich. Dadurch, daß eine metallische Halterung 6 für den dielektrischen Körper 5 verwendet werden kann, läßt sich die in dem dielektrischen Körper entstandene Wärme sehr wirkungsvoll nach außen ableiten.A recess 4 is provided in the dielectric cylinder 2, into which a dielectric body 5 can be immersed. The resonance frequency of the resonator depends on the immersion depth. The recess 4 is arranged outside the center of the dielectric cylinder in an area in which the electric field strength e.g. of the TE 01δ wave mode has a maximum. This allows a large tuning range to be achieved with a relatively small-volume dielectric body 5. The position of the recess 4 also ensures that the magnetic field lines are oriented almost perpendicular to a metal rod 6 guiding the dielectric body 4. The metal rod 6, which is connected to the dielectric body 4 and, on the other hand, is led out of the housing 1, serves as a holder with which the immersion depth of the dielectric body 2 can be adjusted. Because of the orthogonal orientation of the magnetic field lines to the holder 6, hardly any currents are induced therein, even if the holder 6 is made of metal. The holder in the position described thus has only a minor influence on the quality of the resonator. Because a metallic holder 6 can be used for the dielectric body 5, the heat generated in the dielectric body can be dissipated to the outside very effectively.

Bei dem in Fig.1 gezeigten Ausführungsbeispiel wird der dielektrische Körper 5 in der Aussparung 4 parallel zur Längsachse des dielektrischen Zylinders 2 geführt. Dementsprechend ist auch der als Halterung dienende Metallstab 6 gerichtet. Beim der Fig.2 zu entnehmenden Ausführungsbeispiel ist die Aussparung 7 segmentförmig, so daß ein entsprechend geformter dielektrischer Körper 8 seitlich, also senkrecht zur Längsachse des Zylinders 2, in die Aussparung 7 eintaucht. Der die Frequenz abstimmende dielektrische Körper 8 befindet sich auch bei dieser Ausführung in einem Bereich des dielektrischen Zylinders, wo die elektrische Feldstärke ein Maximum hat. Dann verlaufen ebenso wie beim Ausführungsbeispiel der Fig.1 die magnetischen Feldlinien nahezu senkrecht zu einer mit dem dielektrischen Körper 8 verbundenen Halterung 9, welche orthogonal zur Längsachse des dielektrischen Zylinders 1 gerichtet ist. Damit sind ebenso die Voraussetzungen gegeben, eine metallische Halterung 9, welche eine gute Wärmeableitung bewirkt, zu verwenden, ohne daß die Güte des Resonators darunter leidet.In the exemplary embodiment shown in FIG. 1, the dielectric body 5 is guided in the recess 4 parallel to the longitudinal axis of the dielectric cylinder 2. Accordingly, the metal rod serving as a holder is also 6 directed. In the embodiment shown in FIG. 2, the recess 7 is segment-shaped, so that a correspondingly shaped dielectric body 8 dips into the recess 7 laterally, that is to say perpendicular to the longitudinal axis of the cylinder 2. The dielectric body 8 which tunes the frequency is also in this embodiment in a region of the dielectric cylinder where the electric field strength has a maximum. Then, just as in the exemplary embodiment in FIG. 1, the magnetic field lines run almost perpendicular to a holder 9 connected to the dielectric body 8, which is oriented orthogonally to the longitudinal axis of the dielectric cylinder 1. This also provides the prerequisites for using a metallic holder 9 which effects good heat dissipation without the quality of the resonator suffering.

Claims (3)

Abstimmbarer dielektrischer Resonator, welcher ein in einem Gehäuse angeordnetes Dielektrikum und einen in eine Aussparung des Dielektrikums eintauchbaren dielektrischen Körper aufweist, wobei die Eintauchtiefe des dielektrischen Körpers, von der die Resonanzfrequenz des Resonators abhängt, mittels einer am dielektrischen Körper befestigten und außerhalb des Gehäuses zugängigen Halterung einstellbar ist, und die Aussparung außerzentrisch in dem Dielektrikum angeordnet ist und zwar in einem Bereich, in dem die elektrische Feldstärke möglichst groß ist, dadurch gekennzeichnet, daß die Halterung (6, 9) metallisch ist und daß die Aussparung (4, 7) an einer Stelle angeordnet ist, wo die magnetischen Feldlinien möglichst orthogonal zu der metallischen Halterung (6, 9) für den in die Aussparung (4, 7) eintauchbaren dielektrischen Köper (5, 8) orientiert sind.Tunable dielectric resonator, which has a dielectric arranged in a housing and a dielectric body which can be immersed in a recess in the dielectric, the immersion depth of the dielectric body, on which the resonance frequency of the resonator depends, by means of a holder fastened to the dielectric body and accessible outside the housing is adjustable, and the recess is arranged eccentrically in the dielectric, specifically in an area in which the electric field strength is as large as possible, characterized in that the holder (6, 9) is metallic and that the recess (4, 7) is on is arranged at a point where the magnetic field lines are oriented as orthogonally as possible to the metallic holder (6, 9) for the dielectric body (5, 8) which can be immersed in the recess (4, 7). Dielektrischer Resonator nach Anspruch 1, dadurch gekennzeichnet, daß die außerzentrische Aussparung (4) im Dielektrikum (2) so angeordnet ist, daß der dielektrische Körper (5) darin parallel zur Längsachse des Dielektrikum (2) eintaucht.Dielectric resonator according to Claim 1, characterized in that the off-center recess (4) is arranged in the dielectric (2) in such a way that the dielectric body (5) is immersed therein parallel to the longitudinal axis of the dielectric (2). Dielektrischer Resonator nach Anspruch 1, dadurch gekennzeichnet, daß die außerzentrische Aussparung (7) im Dielektrikum (2) so angeordnet ist, daß der dielektrische Körper (8) darin senkrecht zur Längsachse des Dielektrikums (2) eintaucht.Dielectric resonator according to Claim 1, characterized in that the off-center recess (7) is arranged in the dielectric (2) in such a way that the dielectric body (8) is immersed therein perpendicularly to the longitudinal axis of the dielectric (2).
EP93118715A 1992-12-05 1993-11-22 Adjustable dielectric resonator Ceased EP0601369A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924241027 DE4241027C2 (en) 1992-12-05 1992-12-05 Tunable dielectric resonator
DE4241027 1992-12-05

Publications (1)

Publication Number Publication Date
EP0601369A1 true EP0601369A1 (en) 1994-06-15

Family

ID=6474512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93118715A Ceased EP0601369A1 (en) 1992-12-05 1993-11-22 Adjustable dielectric resonator

Country Status (2)

Country Link
EP (1) EP0601369A1 (en)
DE (1) DE4241027C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004054033A1 (en) * 2002-12-11 2004-06-24 Thales Suisse Sa Tunable high-frequency filter arrangement and method for the production thereof

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI97091C (en) * 1994-10-05 1996-10-10 Nokia Telecommunications Oy Dielectric resonator
DE19824997C2 (en) * 1998-06-05 2003-01-09 Forschungszentrum Juelich Gmbh Multipole bandpass filter with elliptical filter characteristics
DE19927798A1 (en) * 1999-06-18 2001-01-04 Forschungszentrum Juelich Gmbh The electrical resonator configuration for microwave multipole bandpass filters
US20050200437A1 (en) 2004-03-12 2005-09-15 M/A-Com, Inc. Method and mechanism for tuning dielectric resonator circuits
US20080272860A1 (en) * 2007-05-01 2008-11-06 M/A-Com, Inc. Tunable Dielectric Resonator Circuit
FR3015782B1 (en) 2013-12-20 2016-01-01 Thales Sa HYPERFREQUENCY FILTER PASSES A TUNABLE BAND BY ROTATING A DIELECTRIC ELEMENT

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55141803A (en) * 1979-04-23 1980-11-06 Fujitsu Ltd Dielectric resonator
FR2534088A1 (en) * 1982-10-01 1984-04-06 Murata Manufacturing Co DIELECTRIC RESONATOR
US4667172A (en) * 1986-04-07 1987-05-19 Motorola, Inc. Ceramic transmitter combiner with variable electrical length tuning stub and coupling loop interface
US4810984A (en) * 1987-09-04 1989-03-07 Celwave Systems Inc. Dielectric resonator electromagnetic wave filter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890422A (en) * 1953-01-26 1959-06-09 Allen Bradley Co Electrically resonant dielectric body
GB2183928B (en) * 1983-12-19 1989-10-11 Motorola Inc Radio frequency filter having a temperature compensated ceramic resonator
IT1246747B (en) * 1990-12-28 1994-11-26 For E M SYSTEM FOR TUNING HIGH-FREQUENCY DIELECTRIC RESONATORS AND RESONATORS SO OBTAINED.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55141803A (en) * 1979-04-23 1980-11-06 Fujitsu Ltd Dielectric resonator
FR2534088A1 (en) * 1982-10-01 1984-04-06 Murata Manufacturing Co DIELECTRIC RESONATOR
US4667172A (en) * 1986-04-07 1987-05-19 Motorola, Inc. Ceramic transmitter combiner with variable electrical length tuning stub and coupling loop interface
US4810984A (en) * 1987-09-04 1989-03-07 Celwave Systems Inc. Dielectric resonator electromagnetic wave filter

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP-A-4 296 104 (MURATA MFG CO LTD) 20. Oktober 1992 *
PATENT ABSTRACTS OF JAPAN vol. 5, no. 11 (E - 42)<683> 23 January 1981 (1981-01-23) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004054033A1 (en) * 2002-12-11 2004-06-24 Thales Suisse Sa Tunable high-frequency filter arrangement and method for the production thereof
US7843286B2 (en) 2002-12-11 2010-11-30 Thales Dielectric resonator filter having a tunable element eccentrically located and a method of production thereof

Also Published As

Publication number Publication date
DE4241027C2 (en) 1997-03-20
DE4241027A1 (en) 1994-06-09

Similar Documents

Publication Publication Date Title
DE69427780T2 (en) Dielectric resonator and dielectric filter
DE2939844C2 (en)
DE60026037T2 (en) DIELECTRIC RESONATOR AND DIELECTRIC FILTER
DE69018701T2 (en) Dielectric resonator device.
DE69032666T2 (en) Encapsulated piezoelectric resonator
DE2538614B2 (en) Dielectric resonator
EP0337371B1 (en) Microwave oscillator
DE4241027C2 (en) Tunable dielectric resonator
DE69017867T2 (en) Voting device.
EP0601370A1 (en) Dielectric resonator
DE2701294C3 (en) Piezoelectric resonator
DE69321152T2 (en) Dielectric resonator and method for adjusting its characteristics
DE3029754A1 (en) SAMPLE HEAD FOR ELECTRON SPIN RESONANCE AND PARAMAGNETIC ELETRON RESONANCE MEASUREMENTS
DE3022481A1 (en) SAMPLING HEAD FOR ELECTRON SPIN RESONANCE AND PARAMAGNETIC ELECTRON RESONANCE MEASUREMENTS
EP0957529A1 (en) Method for tuning the resonance frequency of a ring resonator
DE4224023A1 (en) Transverse-type gas laser oscillator - has gas discharge region in housing with permanent magnets providing field to increase ionisation of gas flow
DE3942509A1 (en) HF circuit with tunable printed coil - having inductance varied by moving relative position of ferrite element i.e. by distance or amt. of coverage
DE4107627C2 (en) Resonator for electron spin resonance spectroscopy
DE3935785C2 (en)
DE4216035C1 (en) Holder for oscillating quartz discs - has lug with mounting section for retaining marginal zone of quartz resonator disk
DE1186119B (en) Cavity resonator arrangement for electrical high frequency oscillations
DE4241026C2 (en) Dielectric resonator
DE4319346A1 (en) Line resonator
DE2231695C3 (en) Selectively damped traveling wave tube
DE3850404T2 (en) TUNING DEVICE FOR A MICROWAVE DIODE.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19940318

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE ES FR GB IT LI SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROBERT BOSCH GMBH

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19961030

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19970427