DE2851870A1 - Temp. compensation for hollow microwave resonator - uses thin walled ceramic tube attached to metal carrier as compensating element - Google Patents
Temp. compensation for hollow microwave resonator - uses thin walled ceramic tube attached to metal carrier as compensating elementInfo
- Publication number
- DE2851870A1 DE2851870A1 DE19782851870 DE2851870A DE2851870A1 DE 2851870 A1 DE2851870 A1 DE 2851870A1 DE 19782851870 DE19782851870 DE 19782851870 DE 2851870 A DE2851870 A DE 2851870A DE 2851870 A1 DE2851870 A1 DE 2851870A1
- Authority
- DE
- Germany
- Prior art keywords
- compensation
- tube
- temp
- resonator
- ceramic
- 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- Withdrawn
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 title abstract 2
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 230000005684 electric field Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 229910001369 Brass Inorganic materials 0.000 abstract description 2
- 239000010951 brass Substances 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
- H03B5/1817—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
- H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
- H03L1/021—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only of generators comprising distributed capacitance and inductance
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
- H03B2201/01—Varying the frequency of the oscillations by manual means
- H03B2201/014—Varying the frequency of the oscillations by manual means the means being associated with an element comprising distributed inductances and capacitances
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
Mikrowellen-Netzwerk mit einer TemperaturkompensationMicrowave network with temperature compensation
Die Erfindung bezieht sich auf ein Netzwerk mit frequenzbestimmenden Resonanzkreisen, die Kompensationselemente zur Kompensation des .Temperaturkoeffizienten enthalten.The invention relates to a network with frequency-determining Resonance circles, the compensation elements to compensate for the temperature coefficient contain.
Bei Oszillatoren, Resonatoren , Frequenzdiskriminatoren, Filtern und ähnlichen Netzwerken mit toleranzbehafteten Temperaturkoeffizienten besteht das Problem, in einfacher Weise eine sehr genaue Temperaturkompensation der frequenzbestimmenden Schwingkreise zu erreichen. Bei der Temperaturkompensation durch Verbindung von Materialien verschiedener Längenausdehnung, z.B. mit Bimetallstreifen, oder mit Materialien verschiedener Wärmeausdehnung ist, abgesehen von einem zum Teil hohen mechanischen Aufwand, kein Ausgleich von TK-Toleranzen möglich. Dasselbe trifft für die Kompensation mit Keramiken verschiedener Temperaturkoeffizienten zu. Die Lösung, Frequenzkonstanz durch Materialien kleinster Wärmeausdehnung zu erreichen, wie Hohlraumresonatoren für Oszillatoren, Filter usw. aus Superinvar oder LC-Resonanzkreise mit Invarspulen erfordert hohe Herstellungskosten und besitzt für viele Anwendungen nicht die ausreichende Temperaturabhängigkeit.With oscillators, resonators, frequency discriminators, filters and There are similar networks with temperature coefficients subject to tolerances Problem, in a simple way, a very precise temperature compensation of the frequency-determining To achieve resonant circles. With temperature compensation by connecting Materials of different length expansion, e.g. with bimetal strips, or with Materials of different thermal expansion is, apart from a partly high one mechanical effort, no compensation of TK tolerances possible. Same thing happens for compensation with ceramics of different temperature coefficients. the Solution, frequency constancy through materials with minimal thermal expansion to achieve such as cavity resonators for oscillators, filters, etc. from superinvar or LC resonance circuits with invar coils requires high manufacturing costs and possesses insufficient temperature dependence for many applications.
Im Hauptpatent .. .. ... (Aktenz.: P 27 40 294.4) ist eine Lösung für die Kompensierung positiver oder negativer Temperaturkoeffizienten angegeben, wonach die Kompensationselemente aus wenigstens einem dielektrischen oder magnetischen Körper mit positivem oder negativem Temperaturkoeffizienten bestehen, die im magnetischen oder elektrischen Feld des Resonanzkreises derart einstellbar angeordnet sind, daß der Temperaturkoeffizient des Resonanzkreises einschließlich gegebenenfalls angeschlossener aktiver und passiver Bauteile durch Frequenzverstimmung beliebig genau kompensierbar ist.In the main patent ... ... (file: P 27 40 294.4) is a solution specified for the compensation of positive or negative temperature coefficients, after which the compensation elements consist of at least one dielectric or magnetic Bodies with positive or negative temperature coefficients exist in the magnetic or the electric field of the resonance circuit are arranged adjustable in such a way that the temperature coefficient of the resonance circuit including any connected Active and passive components can be compensated for as precisely as required by means of frequency detuning is.
Der Erfindung liegt die Aufgabe zugrunde, das Netzwerk nach dem Hauptpatent hinsichtlich der Temperaturkompensation insbesondere für einen Hohlraumresonator zu verbessern.The invention is based on the object of the network according to the main patent with regard to temperature compensation, especially for a cavity resonator to improve.
Diese Aufgabe wird gemäß der Erfindung in der Weise gelöst, daß die Kompensationselemente aus einem dünnwandigen, hohlzylindrischen Teil (Röhrchen) aus keramischem Material bestehen, das in einem Führungselement befestigt ist.This object is achieved according to the invention in such a way that the Compensation elements made from a thin-walled, hollow-cylindrical part (tube) consist of ceramic material which is fastened in a guide element.
In vorteilhafter Ausgestaltung des Erfindungsgegenstandes ist vorgesehen, daß die Wandstärke des Röhrchens einige Zehntel Millimeter beträgt, daß das keramische Material eine N 470-Keramik ist. und daß das Führungselement aus einem metallischen Gewindestift besteht, mit dem das Röhrchen durch Weichlöten oder Kitten verbunden ist.In an advantageous embodiment of the subject matter of the invention, it is provided that the wall thickness of the tube is a few tenths of a millimeter, that the ceramic Material is an N 470 ceramic. and that the guide element consists of a metallic There is a threaded pin with which the tube is connected by soft soldering or cement is.
Nachstehend wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.The invention is illustrated below with the aid of one in the drawing Embodiment explained in more detail.
Es zeigen Fig. 1 einen Halbleiteroszillator mit einem Hohlraumresonator und einem in diesen eintauchenden Kompensationselement und Fig. 2 das Kompensationselement in einer Einzeldarstellung.1 shows a semiconductor oscillator with a cavity resonator and a compensation element immersed in this, and FIG. 2 shows the compensation element in a single representation.
Der in Fig. 1 dargestellte Halbleiteroszillator enthält als frequenzbestimmendes Element einen Hohlraumresonator 1, der mit einem in eine stirnseitige Bohrung des Resonatortopfes eingesetzten Keramikstift 2 in seiner Frequenz einstellbar ist. Im Innenraum des Resonators ist auf der bodenseitigen Platte 8 ein Halbleiterelement 3, beispielsweise ein Transistor angeordnet, dessen Spannungszuführungen 5, beispielsweise I)urchführungskondensatoren oder -filter, in die Bodenplatte 8 eingesetzt sind. Sowohl das aktive Element 3 mit seiner Ankopplung wie auch der Resonator 1, der beispielsweise aus Messing besteht, der Keramikftift 2 und auch die Leistungsauskopplung 4 bestimmen die Temperaturabhängigkeit der Oszillatorfrequenz, und zwar einerseits durch die unterschiedlichen temperaturabhängigen Längen- und Lageänderungen, andererseits durch die temperaturabhängige Impedanzänderung des aktiven Elementes. Die Temperaturkompensation erfolgt mit einem in den Innenraum des Hohlraumresonators 1 eintauchenden, in seiner Eintauchtiefe einstellbaren Kompensationselement 6 aus dielektrischem Material. Mit ihm kann die Frequenz des Oszillators sehr fein innerhalb eines ausreichenden Frequenzbereichs geändert werden.The semiconductor oscillator shown in Fig. 1 contains as a frequency-determining Element has a cavity resonator 1, which is connected to a bore in the end face of the Resonator pot inserted ceramic pin 2 is adjustable in frequency. In the interior of the resonator, a semiconductor element is on the bottom plate 8 3, for example a transistor arranged, the voltage supply lines 5, for example I) bushing capacitors or filters into which the base plate 8 is inserted. Both the active element 3 with its coupling and the resonator 1, the for example made of brass, the ceramic pin 2 and also the power output 4 determine the temperature dependence of the oscillator frequency, on the one hand due to the different temperature-dependent changes in length and position, on the other hand due to the temperature-dependent change in impedance of the active element. The temperature compensation takes place with a dipping into the interior of the cavity resonator 1 in its Immersion depth adjustable compensation element 6 made of dielectric material. With it, the frequency of the oscillator can be very fine within a sufficient Frequency range can be changed.
Das Kompensationselement 6 besteht aus einem dünnwandigen Röhrchen aus N 470-Keramik, das in einem metalli- schen Schraubfuß 7 befestigt, beispielsweise weichgelötet oder gekitten ist. Die Wandstärke des Röhrchens beträgt einige Zehntel Millimeter.The compensation element 6 consists of a thin-walled tube made of N 470 ceramic, which is in a metallic between screw foot 7 attached, for example, is soldered or cemented. The wall thickness of the tube is a few tenths of a millimeter.
Die erfindungsgemäße Ausführung des Kompensationselementes 6 hat folgende Vorteile: Es ergibt sich ein hohes Verhältnis von Kompensationswirknng zu elektrischer Verstimmung des Resonators, d.h. eine den Zusammenhang zwischen der Frequenzverstimmung und dem Temperaturkoeffizienten darstellende Kennlinie verläuft mit großer Steigung. Dies wird einerseits durch ein großes Verhältnis des negativen Temperaturkoeffizienten der Keramik (TK = - 470 10#6/K) zur Dielektrizitätszahl bestimmt, andererseits durch die geringe Wandstärke des Kermikröhrchens und die dadurch bedingte hohe Wirksamkeit wegen einer guten Felddurchdringung der Keramik, die ansonsten wegen der relativ hohen Dielektrizitätszahl von ca. 50 nämlich nur beschränkt möglich ist. Durch das geringe Volumen der in den Resonator eintauchenden verlustarmen Keramik ergibt sich nur eine vernachlässibare Verminderung der Resonatorgüte. Ein weiterer Vorteil der erfindungsgemäßen Ausführung des Kompensationselementes besteht darin, daß Störresonanzen (Eigenrsonanzen) des Kompensationselementes erst oberhalb 10 GHz auftreten, da der dünnwandige Querschnitt des Keramikröhrchens zur dielektrischen Leitung einer Welle ungeeignet ist.The embodiment of the compensation element 6 according to the invention has the following Advantages: There is a high ratio of compensation effect to electrical Detuning the resonator, i.e. the relationship between the frequency detuning and the characteristic curve representing the temperature coefficient has a steep slope. On the one hand, this is due to a large ratio of the negative temperature coefficient of the ceramic (TK = -470 10 # 6 / K) for the dielectric constant, on the other hand by the small wall thickness of the ceramic tube and the resulting high effectiveness because of the good field penetration of the ceramic, otherwise because of the relatively high dielectric constant of approx. 50 is only possible to a limited extent. By the low volume of the low-loss ceramic immersed in the resonator results only a negligible reduction in the resonator quality. Another benefit of the embodiment of the compensation element according to the invention is that interference resonances (Eigenrsonanzen) of the compensation element only occur above 10 GHz, since the thin-walled cross-section of the ceramic tube for dielectric conduction of a wave is unsuitable.
5 Patentansprüche.5 claims.
2 Figuren2 figures
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782851870 DE2851870A1 (en) | 1978-11-30 | 1978-11-30 | Temp. compensation for hollow microwave resonator - uses thin walled ceramic tube attached to metal carrier as compensating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782851870 DE2851870A1 (en) | 1978-11-30 | 1978-11-30 | Temp. compensation for hollow microwave resonator - uses thin walled ceramic tube attached to metal carrier as compensating element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2851870A1 true DE2851870A1 (en) | 1980-06-04 |
Family
ID=6055993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19782851870 Withdrawn DE2851870A1 (en) | 1978-11-30 | 1978-11-30 | Temp. compensation for hollow microwave resonator - uses thin walled ceramic tube attached to metal carrier as compensating element |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2851870A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0125451A2 (en) * | 1983-05-16 | 1984-11-21 | Northern Telecom Limited | Mounting a semiconductor device in a microwave cavity oscillator |
| DE3326830A1 (en) * | 1983-07-26 | 1985-02-14 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Arrangement for temperature compensation of waveguide circuits |
| EP0691702A3 (en) * | 1994-07-07 | 1997-03-26 | Com Dev Ltd | Multi-mode temperature compensated filters and a method of constructing and compensating therefor |
| EP2437346A1 (en) * | 2010-10-01 | 2012-04-04 | Thales | Hyperfrequency filter with dielectric resonator |
-
1978
- 1978-11-30 DE DE19782851870 patent/DE2851870A1/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0125451A2 (en) * | 1983-05-16 | 1984-11-21 | Northern Telecom Limited | Mounting a semiconductor device in a microwave cavity oscillator |
| EP0125451A3 (en) * | 1983-05-16 | 1985-11-27 | Northern Telecom Limited | Mounting a semiconductor device in a microwave cavity oscillator |
| DE3326830A1 (en) * | 1983-07-26 | 1985-02-14 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Arrangement for temperature compensation of waveguide circuits |
| EP0691702A3 (en) * | 1994-07-07 | 1997-03-26 | Com Dev Ltd | Multi-mode temperature compensated filters and a method of constructing and compensating therefor |
| EP2437346A1 (en) * | 2010-10-01 | 2012-04-04 | Thales | Hyperfrequency filter with dielectric resonator |
| FR2965668A1 (en) * | 2010-10-01 | 2012-04-06 | Thales Sa | DIELECTRIC RESONATOR HYPERFREQUENCY FILTER |
| US8847710B2 (en) | 2010-10-01 | 2014-09-30 | Thales | Microwave filter with dielectric resonator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OAP | Request for examination filed | ||
| OD | Request for examination | ||
| 8176 | Proceedings suspended because of application no: |
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| 8130 | Withdrawal | ||
| 8178 | Suspension cancelled |