EP0911905A1 - Ring resonator - Google Patents

Ring resonator Download PDF

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Publication number
EP0911905A1
EP0911905A1 EP98117113A EP98117113A EP0911905A1 EP 0911905 A1 EP0911905 A1 EP 0911905A1 EP 98117113 A EP98117113 A EP 98117113A EP 98117113 A EP98117113 A EP 98117113A EP 0911905 A1 EP0911905 A1 EP 0911905A1
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EP
European Patent Office
Prior art keywords
ring
line
ring resonator
planar
resonator
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Withdrawn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
EP98117113A
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German (de)
French (fr)
Inventor
Martin Schallner
Willibald Konrath
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.)
Telent GmbH
Original Assignee
Robert Bosch GmbH
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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0911905A1 publication Critical patent/EP0911905A1/en
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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
    • H01P7/08—Strip line resonators
    • H01P7/082—Microstripline resonators

Definitions

  • the present invention relates to a ring resonator which as a planar conduction ring on a substrate next to one planar line of a microwave circuit is arranged.
  • a ring resonator is used in microwave circuits used to e.g. an oscillator on one tune the desired resonance frequency or order a certain narrow frequency band from a larger one Filter out the frequency range.
  • the resonator frequency depends strongly on the distance of the Ring resonator opposite the cover of a housing in which the microwave circuit housed with the ring resonator is, from.
  • the resonance frequency is undesirable changes subject.
  • the invention is therefore based on the object Specify ring resonator of the type mentioned, the one has the highest possible resonator quality and low Effort can be realized.
  • conduit ring with respect to its Conductor width and its diameter is dimensioned so that it resonates on an odd harmonic.
  • the ring resonator is not at its fundamental wave, but with one of its odd harmonics is operated, its diameter is larger than that of Fundamental wave operation. That is, the curvature of the Line ring is less, which increases the radiation electromagnetic energy significantly reduced, so that the resonator quality is significantly increased. During harmonic operation do not occur several modes side by side, so that the slot in the line ring to suppress a mode can be omitted and thereby a further increase in quality is achievable. Because of the low radiation Electromagnetic energy also affects the distance less between the ring resonator and the housing cover heavily on the resonance frequency. The larger dimension the line ring also has the advantage that it is less sensitive to manufacturing tolerances.
  • a coupling line in addition to the line ring be arranged to the purpose of variable voting a varactor diode can be connected to the resonance frequency can.
  • a ring resonator consisting of a planar line ring 1, which is applied to a substrate 2 lying in the plane of the drawing.
  • the line ring 1 is arranged next to a planar line 3, which is part of a microwave circuit.
  • the degree of coupling between the ring resonator and the line 3 depends on the distance between the line ring 1 and the planar line 3.
  • the width w and the outer diameter d of the line ring 1 are dimensioned such that the ring resonator resonates on the first, third, fifth, ... harmonic.
  • the resonance frequency of the first harmonic of the ring resonator is approximately 18.5 GHz, if, for example, a 0.381 mm thick Al 2 O 3 ceramic substrate is used.
  • the ring resonator can be applied to a wide variety of substrate materials with little loss.
  • substrates with a high relative dielectric constant eg Al 2 O 3
  • a low temperature response of the dielectric constant of the selected substrate has the effect that the resonance frequency changes only slightly as a function of the temperature.
  • a reduction in the temperature dependence of the resonance frequency can be achieved in particular by adjusting the temperature coefficient of the dielectric constant in the manufacture of the substrate so that the influences of the various temperature-dependent mechanisms (for example linear expansion) are compensated for.
  • a coupling line 4 arranged in addition to the line ring 1, a coupling line 4 arranged.
  • this coupling line 4 depending on whose length l and width b can be a desired one Resonance frequency can be set.
  • the coupling between the coupling line 4 and the ring resonator 1 is by their mutual distance a is determined.
  • a varactor diode 5 to the coupling line 4 connect to which a control voltage is applied.

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  • Control Of Motors That Do Not Use Commutators (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

The planar ring resonator (1) is formed on a substrate and is positioned near to a planar conductor (3) with the spacing depending upon the efficiency of the arrangement. The thickness (w) and diameter (d) determine the harmonics of the resonator. The substrate is a material with a relatively high dielectric constant.

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft einen Ringresonator, der als planarer Leitungsring auf einem Substrat neben einer planaren Leitung einer Mikrowellenschaltung angeordnet ist. Ein solcher Ringresonator wird in Mikrowellenschaltungen dazu eingesetzt, um z.B. einen Oszillator auf eine gewünschte Resonanzfrequenz abzustimmen oder um ein bestimmtes schmales Frequenzband aus einem größeren Frequenzbereich herauszufiltern.The present invention relates to a ring resonator which as a planar conduction ring on a substrate next to one planar line of a microwave circuit is arranged. Such a ring resonator is used in microwave circuits used to e.g. an oscillator on one tune the desired resonance frequency or order a certain narrow frequency band from a larger one Filter out the frequency range.

Aus Shih-Lin LU and A.M. Ferendeci: Varactor tuned ring resonator microwave oscillator, Electronics Letters, Vol. 32, No. 1, 1996, Seiten 46 bis 48 ist ein Ringresonator bekannt, dessen Leitungsring bezüglich seiner Breite und seines Durchmessers so dimensioniert ist, daß er mit seiner Grundfrequenz betrieben wird. Bei dieser Grundfrequenz treten allerdings zwei eng benachbarte Moden auf, von denen ein Mode unterdrückt werde muß. Dies geschieht durch einen Schlitz im Leitungsring. Durch diesen Schlitz hat der Ringresonator eine höhere Abstrahlung an elektromagnetischer Energie, wodurch sich nachteiligerweise die Güte des Resonators verringert. Durch die hohe Abstrahlung des Resonators hängt die Resonanzfrequenz stark vom Abstand des Ringresonators gegenüber dem Deckel eines Gehäuses, in dem die Mikrowellenschaltung mit dem Ringresonator untergebracht ist, ab. Durch Variationen des Abstandes des Gehäusedeckels gegenüber dem Ringresonator - verursacht durch thermische Ausdehnung des Gehäuses oder durch mechanische Schwingungen - ist die Resonanzfrequenz unerwünschten Änderungen unterworfen.From Shih-Lin LU and A.M. Ferendeci: Varactor tuned ring resonator microwave oscillator, Electronics Letters, vol. 32, No. 1, 1996, pages 46 to 48 is a ring resonator known, the line ring with respect to its width and of its diameter is dimensioned so that it with its Fundamental frequency is operated. At this fundamental frequency however, there are two closely adjacent fashions, one of which a fashion must be suppressed. This happens through one Slot in the line ring. Through this slot the Ring resonator has a higher radiation at electromagnetic Energy, which adversely affects the quality of the Resonators decreased. Due to the high radiation of the The resonator frequency depends strongly on the distance of the Ring resonator opposite the cover of a housing in which the microwave circuit housed with the ring resonator is, from. By varying the distance of the housing cover compared to the ring resonator - caused by thermal Expansion of the housing or due to mechanical vibrations - The resonance frequency is undesirable changes subject.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Ringresonator der eingangs genannten Art anzugeben, der eine möglichst hohe Resonatorgüte aufweist und dabei mit geringem Aufwand realisiert werden kann.The invention is therefore based on the object Specify ring resonator of the type mentioned, the one has the highest possible resonator quality and low Effort can be realized.

Vorteile der ErfindungAdvantages of the invention

Die genannte Aufgabe wird mit den Merkmalen des Anspruchs 1 dadurch gelost, daß der Leitungsring bezüglich seiner Leiterbreite und seines Durchmessers so dimensioniert ist, daß er auf einer ungeraden Oberwelle resoniert.This object is achieved with the features of claim 1 solved that the conduit ring with respect to its Conductor width and its diameter is dimensioned so that it resonates on an odd harmonic.

Dadurch, daß der Ringresonator nicht bei seiner Grundwelle, sondern bei einer seiner ungeradzahligen Oberwellen betrieben wird, ist sein Durchmesser größer als beim Grundwellen-Betrieb. Das heißt, die Krümmung des Leitungsringes ist geringer, wodurch sich die Abstrahlung elektromagnetischer Energie wesentlich verringert, so daß die Resonatorgüte deutlich gesteigert wird. Beim Oberwellen-Betrieb treten nicht mehrere Moden nebeneinander auf, so daß der Schlitz im Leitungsring zur Unterdrückung eines Modes entfallen kann und dadurch eine weitere Steigerung der Güte erreichbar ist. Wegen der geringen Abstrahlung elektromagnetischer Energie wirkt sich ebenso der Abstand zwischen dem Ringresonator und dem Gehäusedeckel weniger stark auf die Resonanzfrequenz aus. Die größere Abmessung des Leitungsringes hat zudem den Vorteil, daß er unempfindlicher gegen Fertigungstoleranzen ist.Because the ring resonator is not at its fundamental wave, but with one of its odd harmonics is operated, its diameter is larger than that of Fundamental wave operation. That is, the curvature of the Line ring is less, which increases the radiation electromagnetic energy significantly reduced, so that the resonator quality is significantly increased. During harmonic operation do not occur several modes side by side, so that the slot in the line ring to suppress a mode can be omitted and thereby a further increase in quality is achievable. Because of the low radiation Electromagnetic energy also affects the distance less between the ring resonator and the housing cover heavily on the resonance frequency. The larger dimension the line ring also has the advantage that it is less sensitive to manufacturing tolerances.

Zur Abstimmung der Resonanzfrequenz kann gemäß den Unteransprüchen neben dem Leitungsring eine Koppelleitung angeordnet sein, an die zum Zweck einer variablen Abstimmung der Resonanzfrequenz eine Varactordiode angeschlossen sein kann.To tune the resonance frequency according to A coupling line in addition to the line ring be arranged to the purpose of variable voting a varactor diode can be connected to the resonance frequency can.

Beschreibung von AusführungsbeispielenDescription of exemplary embodiments

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

  • Figur 1 einen planaren Ringresonator und
  • Figur 2 einen planaren Ringresonator mit einer Koppelleitung.
    • The invention is explained in more detail below with the aid of two exemplary embodiments shown in the drawing. Show it:
  • 1 shows a planar ring resonator and
  • Figure 2 shows a planar ring resonator with a coupling line.

    • In den Figuren 1 und 2 ist ein Ringresonator dargestellt, bestehend aus einem planaren Leitungsring 1, der auf einem in der Zeichenebene liegenden Substrat 2 aufgebracht ist. Der Leitungsring 1 ist neben einer planaren Leitung 3 angeordnet, welche Teil einer Mikrowellenschaltung ist. Vom Abstand zwischen dem Leitungsring 1 und der planaren Leitung 3 hängt der Kopplungsgrad zwischen dem Ringresonator und der Leitung 3 ab. Die Breite w und der Außendurchmesser d des Leitungsringes 1 sind so dimensioniert, daß der Ringresonator auf der ersten, dritten, fünften, ... Oberwelle resoniert. Bei einem Außendurchmesser d von 4,4 mm und einer Leiterbreite von 0,34 mm des Leitungsringes 1 liegt die Resonanzfrequenz der ersten Oberwelle des Ringresonators bei etwa 18,5 Ghz, wenn z.B. ein 0,381 mm dickes Al2O3 Keramiksubstrat verwendet wird. 1 and 2, a ring resonator is shown, consisting of a planar line ring 1, which is applied to a substrate 2 lying in the plane of the drawing. The line ring 1 is arranged next to a planar line 3, which is part of a microwave circuit. The degree of coupling between the ring resonator and the line 3 depends on the distance between the line ring 1 and the planar line 3. The width w and the outer diameter d of the line ring 1 are dimensioned such that the ring resonator resonates on the first, third, fifth, ... harmonic. With an outer diameter d of 4.4 mm and a conductor width of 0.34 mm of the line ring 1, the resonance frequency of the first harmonic of the ring resonator is approximately 18.5 GHz, if, for example, a 0.381 mm thick Al 2 O 3 ceramic substrate is used.

    Der Ringresonator kann auf unterschiedlichsten Substratmaterialien mit geringen Verlusten aufgebracht werden. Es eignen sich jedoch insbesondere Substrate mit einer hohen relativen Dielektrizitätskonstanten (z.B. Al2 O3), weil sich das Feld sehr stark in diesem Substrat konzentriert und daher die Umgebung einen nur geringen Einfluß auf die Resonanzfrequenz hat. Ein geringer Temperaturgang der Dielektrizitätskonstanten des ausgewählten Substrats bewirkt, daß sich die Resonanzfrequenz in Abhängigkeit von der Temperatur nur wenig ändert. Eine Verringerung der Temperaturabhängigkeit der Resonanzfrequenz kann insbesondere dadurch erreicht werden, daß der Temperaturkoeffizient der Dielektrizitätskonstante bei der Herstellung des Substrats so eingestellt wird, daß sich die Einflüsse der verschiedenen temperaturabhängigen Mechanismen (z.B lineare Ausdehnung) kompensieren.The ring resonator can be applied to a wide variety of substrate materials with little loss. However, substrates with a high relative dielectric constant (eg Al 2 O 3 ) are particularly suitable because the field is very strongly concentrated in this substrate and therefore the environment has only a minor influence on the resonance frequency. A low temperature response of the dielectric constant of the selected substrate has the effect that the resonance frequency changes only slightly as a function of the temperature. A reduction in the temperature dependence of the resonance frequency can be achieved in particular by adjusting the temperature coefficient of the dielectric constant in the manufacture of the substrate so that the influences of the various temperature-dependent mechanisms (for example linear expansion) are compensated for.

    Bei dem in Figur 2 dargestellten Ausführungsbeispiel ist zusätzlich neben dem Leitungsring 1 eine Koppelleitung 4 angeordnet. Mit dieser Koppelleitung 4, in Abhängigkeit von deren Länge l und Breite b, kann eine gewünschte Resonanzfrequenz eingestellt werden. Die Kopplung zwischen der Koppelleitung 4 und dem Ringresonator 1 wird durch deren gegenseitigen Abstand a bestimmt. Soll die Resonanzfrequenz des Ringresonators elektrisch abstimmbar sein, so ist es zweckmäßig, an die Koppelleitung 4 eine Varactordiode 5 anzuschließen, an die eine Steuerspannung gelegt wird.In the embodiment shown in Figure 2 is in addition to the line ring 1, a coupling line 4 arranged. With this coupling line 4, depending on whose length l and width b can be a desired one Resonance frequency can be set. The coupling between the coupling line 4 and the ring resonator 1 is by their mutual distance a is determined. Should the resonance frequency of the ring resonator can be tuned electrically, so it is expedient, a varactor diode 5 to the coupling line 4 connect to which a control voltage is applied.

    Claims (3)

    Ringresonator, der als planarer Leitungsring (1) auf einem Substrat (2) neben einer planaren Leitung (3) einer Mikrowellenschaltung angeordnet ist, dadurch gekennzeichnet, daß der Leitungsring (1) bezuglich seiner Leiterbreite (w) und seines Durchmessers (d) so dimensioniert ist, daß er auf einer ungeradzahligen Oberwelle resoniert.Ring resonator, which acts as a planar line ring (1) a substrate (2) next to a planar line (3) Microwave circuit is arranged, characterized in that the line ring (1) with respect to its conductor width (w) and its diameter (d) is dimensioned so that it on an odd harmonic resonates. Ringresonator nach Anspruch 1, dadurch gekennzeichnet, daß neben dem Leitungsring (1) eine planare Koppelleitung (4) angeordnet ist, deren Abstand (a) gegenüber dem Leitungsring (1) und deren Länge (l) und Breite (b) so gewählt sind, daß sich eine gewünschte Resonanzfrequenz einstellt.Ring resonator according to claim 1, characterized in that in addition to the line ring (1) a planar coupling line (4) is arranged, the distance (a) from the Line ring (1) and their length (l) and width (b) see above are chosen to be a desired resonance frequency sets. Ringresonator nach Anspruch 2, dadurch gekennzeichnet, daß an die Koppelleitung (4) eine Varactordiode (5) angeschlossen ist.Ring resonator according to claim 2, characterized in that a varactor diode (5) on the coupling line (4) connected.
    EP98117113A 1997-10-25 1998-09-10 Ring resonator Withdrawn EP0911905A1 (en)

    Applications Claiming Priority (2)

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    DE19747253 1997-10-25
    DE19747253A DE19747253A1 (en) 1997-10-25 1997-10-25 Ring resonator

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    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US6225879B1 (en) * 1997-10-25 2001-05-01 Robert Bosch Gmbh Unperturbed ring resonator with an odd overtone vibration mode

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US9460884B2 (en) * 2011-07-28 2016-10-04 Trustees Of Tufts College Microplasma generating array
    DE102012221913A1 (en) * 2012-11-29 2014-06-05 Siemens Aktiengesellschaft Directional coupler, in particular with high coupling damping
    US9330889B2 (en) * 2013-07-11 2016-05-03 Agilent Technologies Inc. Plasma generation device with microstrip resonator

    Citations (2)

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    US4048589A (en) * 1975-06-30 1977-09-13 Epsilon Lambda Electronics Corporation Receiver module and components thereof
    FR2631757A1 (en) * 1988-05-17 1989-11-24 Radiotechnique Compelec Tunable microwave oscillator

    Family Cites Families (7)

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    JPS607843B2 (en) * 1979-04-17 1985-02-27 日本電信電話株式会社 Signal separation and combination circuit
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    DE19747253A1 (en) * 1997-10-25 1999-05-06 Bosch Gmbh Robert Ring resonator

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    Publication number Priority date Publication date Assignee Title
    US4048589A (en) * 1975-06-30 1977-09-13 Epsilon Lambda Electronics Corporation Receiver module and components thereof
    FR2631757A1 (en) * 1988-05-17 1989-11-24 Radiotechnique Compelec Tunable microwave oscillator

    Non-Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Title
    J.J. JIMENEZ: "EXPERIMENTAL Q FACTORS OF THREE TYPES OF MICROSTRIP RESONATORS", REVUE DE PHYSIQUE APPLIQUEE., vol. 8, no. 3, September 1973 (1973-09-01), PARIS FR, pages 279 - 282, XP002091130 *

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US6225879B1 (en) * 1997-10-25 2001-05-01 Robert Bosch Gmbh Unperturbed ring resonator with an odd overtone vibration mode

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    US6225879B1 (en) 2001-05-01
    DE19747253A1 (en) 1999-05-06

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