DE689316C

DE689316C - enz and broadcast purposes

Info

Publication number: DE689316C
Application number: DE1934P0068883
Authority: DE
Inventors: Dr-Ing E H Friedrich Scheid; Wilhelm Regerbis
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-02-04
Filing date: 1934-02-04
Publication date: 1940-04-12

Description

Die Erfindung bezieht sich auf regelbare Kondensatoren, insbesondere für Hochfrequenz- und Rundfunkzwecke. Die Regelbarkeit solcher' Kondensatoren wurde bisher auf dem Wege erreicht, daß die z. B. durch Luft oder ein anderes gasförmiges oder flüssiges oder festes Dielektrikum voneinander isolierten, gegebenenfalls auch auf ein festes Dielektrikum aufgebrachten Kondensatorbeläge 'Verschiebbar oder verdrehbar gegeneinander angeordnet wurden.The invention relates to adjustable capacitors, in particular for high frequency and broadcasting purposes. The controllability of such 'capacitors was previously achieved on the way that the z. B. by air or another gaseous or liquid or solid dielectric insulated from one another, optionally also on a solid dielectric applied capacitor coatings' movable or rotatable were arranged against each other.

Von diesen bekannten Ausführungen unterscheiden sich die regelbaren Kondensatoren nach der Erfindung·, bei denen die Kondensatorbeläge samt ihren sie voneinander isolierenden Dielektrikumschichten gegeneinander verschiebbar oder verdrehbar angeordnet sind, dadurch, daß die Änderung ihres Dielektrikums erfindungsgemäß unter Vermeidung vonThe controllable capacitors differ from these known designs according to the invention ·, in which the capacitor plates together with their isolating them from one another Dielectric layers are arranged such that they can be displaced or rotated relative to one another, in that the change in their dielectric according to the invention while avoiding

ao Luftzwischenräumen durch Einführung eines solchen aus verlustarmem, Titandioxyd enthaltendem keramischem Isolierstoff erfolgt und daß die Kondensatorbeläge auf die verschiebbaren Dielektrikumschichten hoher Dielektrizitätskonstante in Form aufgeschmelzter Edelmetallbelegungen aufgebracht sind. Kondensatoren mit... einem Dielektrikum hoher Dielektrizitätskonstante aus Rutil oder anderen Titanverbindungen sind zwar für Festkondensatoren schon vorgeschlagen worden, sie haben sich aber insbesondere in der Hochfrequenztechnik nicht einzuführen vermocht, weil ihr Dielektrikum mit zu großen Verlusten behaftet war. Abweichend von diesen Dielektriken kommen für die Zwecke der Erfindung nur verlustarme, Titandioxyd enthaltende keramische Isolierstoffe hoher· Dielektrizitätskonstante in Frage. Auf diese Weise gelangt man zu verlustarmen regelbaren Kondensatoren besonders kleiner wirtschaftlicher Abmessungen, die gleichwohl eine überraschend große Regelfähigkeit besitzen, wie "sie bisher nur mit Regelkondensatoren bedeutend größerer Abmessungen zu erzielen war. Dieser Vorteil wird vorzugsweise durch die Einführung der verschieb- oder verdrehbaren Dielektrikumsschichten besonders hoher Dielektrizitätskonstante und geringer dielektrischer Verluste^ erzielt.ao air gaps by introducing one made of low-loss titanium dioxide containing ceramic insulating material and that the capacitor pads on the sliding Dielectric layers of high dielectric constant are applied in the form of fused noble metal coatings. Capacitors with ... a dielectric with a high dielectric constant made of rutile or other titanium compounds have already been proposed for fixed capacitors, However, they have not been able to introduce themselves, especially in high-frequency technology, because their dielectric was fraught with too great a loss. Notwithstanding these dielectrics come for the purpose According to the invention, only low-loss, titanium dioxide-containing ceramic insulating materials of high Dielectric constant in question. In this way one arrives at low-loss controllable ones Capacitors of particularly small economic dimensions, which nonetheless have a Have a surprisingly high level of control capability, as "previously only possible with control capacitors was to achieve significantly larger dimensions. This benefit is preferred by the introduction of the shiftable or rotatable dielectric layers particularly high Dielectric constant and low dielectric losses ^ achieved.

In den Fig. 1 bis 6 sind Beispiele von Kondensatoren nach der Erfindung dargestellt.
- Fig. ι zeigt im Mittelschnitt, Fig. 2 im Querschnitt und Fig. 3 in Ansicht von oben einen regelbaren Kondensator, der aus den Platten 10 und 11 aus keramischem Isolierstoff besteht, die mit leitenden, z. B. auf-In Figs. 1 to 6 examples of capacitors according to the invention are shown.
- Fig. Ι shows in central section, Fig. 2 in cross section and Fig. 3 in a view from above a controllable capacitor, which consists of the plates 10 and 11 made of ceramic insulating material, which with conductive, z. B. on-

*) Von dem Patentsucher sind als die Erfinder angegeben worden:*) The patent seeker indicated the following as the inventors:

Or.-Ing. e. h. Friedrich Scheid in Bad Klosterlausnits, Thür., und Wilhelm Regerbis in Hermsdorf, Thür.Or.-Ing. e. H. Friedrich Scheid in Bad Klosterlausnits, Thür., and Wilhelm Regerbis in Hermsdorf, Thür.

Claims

fused precious metal deposits 12 and 13 are provided. Both plates are enclosed by the metal sleeve 14 in which they can be moved against each other. The connections to the capacitor assignments are designated by 15 and 16 in FIGS. 1 and 3. The same numbering for the connections to the capacitor assignments is in the repeated in other figures, in which all parts are marked with the same numbers, insofar as they do not differ from the parts in the preceding figures.

For the plates 10 and 11 is such a Low-loss, titanium dioxide-containing ceramic insulating material selected, the one particularly has a high dielectric constant in order to avoid small movements of the plates against each other to receive relatively large changes in capacity.

Fig. 4 shows in the middle section, Fig. 5 in Cross-section and FIG. 6 in a view from above shows a very similar controllable capacitor according to the invention, in which the mutually displaceable, from the ceramic Special mass high dielectric constant made plates 17 and 18 with the conductive Assignments 19 and 20 are provided. In deviation from that shown in FIG. 1 to 3 shown For example, the two plates and 18 form the dielectric of the capacitor, whereas according to Fig. 1 to 3, the conductive coatings 12 and 13 only by the Dielectric 11 are isolated from one another.

■ Claim:,

Adjustable electrical capacitor for high frequency and radio purposes, its Capacity through progressive change in the mutual overlap of its conductive coatings and its dielectric is regulated, characterized in that the change in its dielectric while avoiding air gaps by introducing such a low-loss, titanium dioxide-containing ceramic insulating material and that its coatings on the dielectric layers of particularly high dielectric constant in a known manner in the form of fused precious metal layers are upset.

1 sheet of drawings