DE682139C - Shielded band filter arrangement with changeable inductively coupled coils - Google Patents

Shielded band filter arrangement with changeable inductively coupled coils

Info

Publication number
DE682139C
DE682139C DET46326D DET0046326D DE682139C DE 682139 C DE682139 C DE 682139C DE T46326 D DET46326 D DE T46326D DE T0046326 D DET0046326 D DE T0046326D DE 682139 C DE682139 C DE 682139C
Authority
DE
Germany
Prior art keywords
coil
coils
coupling
band filter
changeable
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.)
Expired
Application number
DET46326D
Other languages
German (de)
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.)
Telefunken AG
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Priority to DET46326D priority Critical patent/DE682139C/en
Application granted granted Critical
Publication of DE682139C publication Critical patent/DE682139C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01Frequency selective two-port networks
    • H03H7/0153Electrical filters; Controlling thereof
    • H03H7/0161Bandpass filters
    • H03H7/0169Intermediate frequency filters
    • H03H7/0184Intermediate frequency filters with ferromagnetic core

Landscapes

  • Coils Or Transformers For Communication (AREA)

Description

Abgeschirmte Bandfilteranordnung mit veränderlich induktiv gekoppelten Spulen Eine Kopplung von Spulen wird in der Regel in der Weise vorgenommen, daß man die Spulen einander so gegenüberstellt, daß die Spulenachsen zusammenfallen. Bei der Verwendung von Spulen mit Eisenkernen, die mit einem Eisenkern versehen sind, welcher in bekannter Weise zur Abgleichung axial verschiebbar ist, ergibt sich die Schwierigkeit, daß sich bei der Verschiebung der Eisenkerne auch @ die Kopplung ändert und deshalb die gegenseitige Lage der Spulen wieder geändert werden muß.. Aus diesem Grunde hat man die beiden miteinander zu koppelnden Spulen meist durch eine Abschirmwa:nd voneinander getrennt und die Kopplung durch besondere Kopplungsspulen oder Kapazitäten vorgenommen.Shielded band filter arrangement with variable inductively coupled Coils Coils are usually coupled in such a way that the coils are placed opposite one another in such a way that the coil axes coincide. When using coils with iron cores, which are provided with an iron core are, which is axially displaceable in a known manner for adjustment, results The difficulty arises that when the iron cores are shifted, the Coupling changes and therefore the mutual position of the coils can be changed again must .. For this reason you usually have the two coils to be coupled with one another separated from each other by a shielding wall and the coupling by special coupling coils or capacities.

Es ist aber auch bekannt, zwei Topfkernspulen nebeneinander auf einer Grundplatte derart zu befestigen, ddaß dieAchsen derzurAbgleichung axial verschiebbaren, .durch. dieTopfkerne hindurchgehenden Stabkerne parallel zueinander liegen. Die Kopplung der Spulen erfolgt hierbei induktiv idurch die Streuung.But it is also known to have two pot core coils side by side on one To fasten the base plate in such a way that the axes of the .by. the rod cores passing through the pot cores are parallel to one another. the The coils are coupled inductively due to the scattering.

Die Erfindung geht von einer abgeschirmten Bandfilteranordnung mit veränderlich induktiv gekoppelten Spulen aus, deren Achsen bei der festesten Kopplung parallel zueinander liegen und welche derart nebeneinander angeordnet sind, daß bei einer axialen Eisenkernverschiebung zwar die Induktivität, jedoch praktisch nicht die Kopplung geändert wird. Durch die Erfindung wird der Nachteil beseitigt, daß sich bei einer Kopplungsänderung durch Schwenken der einen Spule die Induktivität dieser Spule infolge ihrer Lagenänderung im Abschirmgehäuse ändert.The invention is based on a shielded band filter arrangement changeable inductively coupled coils, the axes of which are at the tightest coupling lie parallel to each other and which are arranged side by side in such a way that in the case of an axial displacement of the iron core, the inductance is, however, practical the coupling is not changed. The invention eliminates the disadvantage that in the event of a coupling change by pivoting one coil, the inductance this coil changes as a result of its change in position in the shielding housing.

Nach der Erfindung wird bei dieser Bandfilteranordnung die schwenkbare Spule oder beide Spulen derart unsymmetrisch im Abschirmgehäuse angeordnet, daß in derjenigen Stellung der Spule, in der die Kurzschlußströme im Gehäuse einen größeren Weg zurücklegen müssen, so daß die Induktivität hierdurch zunehmen würde, die Spule fester mit dem Gehäuse gekoppelt ist, so daß die Induktivit,ät bei der Kopplungsänderung erhalten bleibt. In der Abbildung ist ein Beispiel für die Ausführung der Erfindung gezeigt. Die Spulen sitzen auf Hülsen H, in welchen z. B. mittels eines Gewindes die Eisenkerne zwecks Abgleichung verschiebbar sind. Die Hülse der oberen Spule ist an einer Platte Pl befestigt. Die untere Spule ist gegenüber der oberen schwenkbar. Die Abbildung zeigt die Lage der Spulen bei der festesten Kopplung.According to the invention in this band filter arrangement is the pivotable Coil or both coils arranged asymmetrically in the shielding housing that in that position of the coil in which the short-circuit currents in the housing are greater Have to cover the distance so that the inductance would increase as a result of the coil is more firmly coupled to the housing, so that the inductance at the coupling change preserved. The figure shows an example of the implementation of the invention shown. The coils sit on sleeves H, in which z. B. by means of a thread the iron cores can be moved for the purpose of adjustment. The sleeve of the upper coil is attached to a plate Pl. The lower coil can be pivoted relative to the upper one. The figure shows the position of the coils with the tightest coupling.

Die Wirkungsweise der unsymmetrischen Anordnung der beiden Spulen im Abschirmgehäuse besteht darin, daß bei losester Kopplung, also senkrechtem Kern der schwenkbaren Spule, die Kurzschlußströme den waagerechten Querschnitt des Abschirmzylinders durchfließen. Beim Schwenken der Spule wird der Weg, den die Ströme zurücklegen müssen, immer größer, so daß die Selbstinduktion zunehmen würde, wenn nicht erfindungsgemäß die Anordnung so getroffen wäre, daß sich die Spule bei festerer Kopplung mit der anderen Spule dem Gehäuse mehr nähert, so daß die Rückwirkung der Kurzschlußströme auf die geschwenkte Spule größer ist.How the asymmetrical arrangement of the two coils works in the shield case is that with the loosest coupling, that is, a vertical core the swiveling coil, the short-circuit currents the horizontal cross-section of the shielding cylinder flow through. When the coil is swiveled, the path that the currents travel becomes must, always larger, so that the self-induction would increase, if not according to the invention the arrangement would be such that the coil with a tighter coupling with the other coil closer to the housing, so that the retroactive effect of the short-circuit currents on the swiveled bobbin is larger.

Claims (1)

PATENTANSPRUCH: Abgeschirmte Bandfilteranordnung mit veränderlich induktiv gekoppelten Spulen, deren Achsen bei der festesten Kopplung parallel zueinander liegen und welche derart nebeneinander :angeordnet sind, ddaß bei einer axialen Eisenkernverschiebung zwar die Induktivität, jedoch praktisch nicht die Kopplung geändert wird, dadurch gekennzeichnet, daß bei einer Kopplungsänderung durch Schwenken der einen Spule diese Spule oder beide Spulen derart unsymmetrisch im Abschirmgehäuse angeordnet sind, daß in derjenigen Stellung der Spule, in der die Kurzschlußströme im Gehäuse einen größeren Weg zurücklegen müssen, so daß die Induktivität hierdurch zunehmen würde, die Spule fester mit dem Gehäuse gekoppelt ist, so daß die Induktivität bei der Kopplungsänderung erhalten bleibt.PATENT CLAIM: Shielded band filter arrangement with changeable inductively coupled coils, the axes of which are parallel to each other in the case of the tightest coupling lie and which are so next to each other: are arranged that in an axial The iron core shift affects the inductance, but practically not the coupling is changed, characterized in that when the coupling is changed by pivoting one coil, this coil or both coils so asymmetrically in the shielding housing are arranged that in that position of the coil in which the short-circuit currents have to cover a greater distance in the housing, so that the inductance thereby would increase, the coil is more tightly coupled to the housing, so that the inductance is retained when the coupling is changed.
DET46326D 1936-01-28 1936-01-28 Shielded band filter arrangement with changeable inductively coupled coils Expired DE682139C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DET46326D DE682139C (en) 1936-01-28 1936-01-28 Shielded band filter arrangement with changeable inductively coupled coils

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET46326D DE682139C (en) 1936-01-28 1936-01-28 Shielded band filter arrangement with changeable inductively coupled coils

Publications (1)

Publication Number Publication Date
DE682139C true DE682139C (en) 1939-10-09

Family

ID=7562290

Family Applications (1)

Application Number Title Priority Date Filing Date
DET46326D Expired DE682139C (en) 1936-01-28 1936-01-28 Shielded band filter arrangement with changeable inductively coupled coils

Country Status (1)

Country Link
DE (1) DE682139C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969385C (en) * 1950-11-03 1958-05-29 Lorenz C Ag Adjustable band filter, preferably for high-frequency communications equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969385C (en) * 1950-11-03 1958-05-29 Lorenz C Ag Adjustable band filter, preferably for high-frequency communications equipment

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