DE3604361A1 - Filter for short electromagnetic waves - has resonator inner conductors as copper tube cables, whose inner conductor forms tuner - Google Patents

Filter for short electromagnetic waves - has resonator inner conductors as copper tube cables, whose inner conductor forms tuner

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Publication number
DE3604361A1
DE3604361A1 DE19863604361 DE3604361A DE3604361A1 DE 3604361 A1 DE3604361 A1 DE 3604361A1 DE 19863604361 DE19863604361 DE 19863604361 DE 3604361 A DE3604361 A DE 3604361A DE 3604361 A1 DE3604361 A1 DE 3604361A1
Authority
DE
Germany
Prior art keywords
inner conductor
filter
semi
resonators
electromagnetic waves
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Withdrawn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
DE19863604361
Other languages
German (de)
Inventor
Walter Dipl Ing Meier
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to DE19863604361 priority Critical patent/DE3604361A1/en
Publication of DE3604361A1 publication Critical patent/DE3604361A1/en
Withdrawn legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00Auxiliary devices
    • H01P1/20Frequency-selective devices, e.g. filters
    • H01P1/201Filters for transverse electromagnetic waves
    • H01P1/205Comb or interdigital filters; Cascaded coaxial cavities

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

The filter consists of coaxial line resonators, interdigital, or comb-type, line-coupled resonators (1,2). The resonator inner conductors (1) are formed as semi-rigid cables (1,5,6) with copper tubes. The turning members of the resonators is formed by the inner conductor (6) of the semi-rigid cables. The inner conductor is itself of the semi-rigid cable type, with its metal conductor in dielectric material. The semi-rigid cable former a reactive resistor for the individual resonators. The inner conductor is then soldered to the filter housing (2) for electric connection. ADVANTAGE - Provides lightweight, and compact microwave filter.

Description

Die Erfindung betrifft ein Filter für sehr kurze elektro­ magnetische Wellen gemäß dem Oberbegriff des Patentan­ spruches.The invention relates to a filter for very short electro magnetic waves according to the preamble of the patent saying.

Filter der vorgenannten Art sind z.B. aus der Zeit­ schrift "The Radio and Electronic Engineer", July 1967, S. 39-52 und dort aus dem Aufsatz "The Practical Design of Interdigital and Comb-Line Filters" bzw. aus der Zeit­ schrift "IEEE Transactions on Microwave Theory and Tech­ nics", Sept. 1965, S. 696 bis 698, und dort aus dem Auf­ satz "A Simple Design Procedure for Small Percentage Bandwith Round-Rod Interdigital-Filters" bekannt.Filters of the aforementioned type are e.g. out of time "The Radio and Electronic Engineer", July 1967, Pp. 39-52 and from the essay "The Practical Design of Interdigital and Comb-Line Filters "or from time writing "IEEE Transactions on Microwave Theory and Tech nics ", Sept. 1965, pp. 696 to 698, and there from the Auf sentence "A Simple Design Procedure for Small Percentage Bandwith Round-Rod Interdigital Filters "known.

In der Mikrowellentechnik sind Interdigital- und Kammlei­ tungsfilter bekanntlich Siebschaltungen mit interdigital oder kammartig angeordneten leitungsgekoppelten Resona­ toren.Interdigital and comb are in microwave technology as is well known, filter circuits with interdigital or comb-like line-coupled Resona goals.

Die Innenleiter der Leitungsanordnung bilden zusammen mit einer äußeren metallischen Hülle ein Lechersystem das in sich die Funktion der Koppelelemente und der Resonanzkrei­ se vereinigt. Bekannt ist ferner, Mikrowellenfilter aus einem oder mehreren Koaxialleitungs-Resonatoren herzu­ stellen.The inner conductors of the line arrangement form together with an outer metallic shell a Lechersystem that in the function of the coupling elements and the resonance circuit se united. It is also known to use microwave filters one or more coaxial line resonators put.

Der Erfindung liegt deshalb die Aufgabe zugrunde, ein möglichst kostengünstig herstellbares Mikrowellenfilter mit geringem Gewicht und geringem Volumen anzugeben, das zugleich einen unkomplizierten Aufbau hat. The invention is therefore based on the object Microwave filter that can be produced as inexpensively as possible to indicate with light weight and small volume that at the same time has an uncomplicated structure.  

Anhand eines Ausführungsbeispiels wird nachstehend die Erfindung noch näher erläutert.Using an exemplary embodiment, the Invention explained in more detail.

Es zeigt in der ZeichnungIt shows in the drawing

Fig. 1 als Beispiel ein Kammleitungsfilter, Fig. 1 as an example of a comb-line filter,

Fig. 2 eine vergrößerte Innenleiterdarstellung von Fig. 1. FIG. 2 shows an enlarged inner conductor representation from FIG. 1.

In Fig. 1 ist ein Kammleitungsfilter mit fünf Resonatoren zu erkennen, dessen Innenleiter mit der Bezugsziffer 1 be­ zeichnet sind. Diese Innenleiter sind metallisch und be­ finden sich in einem metallischen Gehäuse 2, an dem selbst auf einer Seite alle metallischen Innenleiter elektrisch leitend verbunden sind, zum Beispiel verlötet sind. In be­ kannter Weise führen zu den Innenleitern des ersten und des letzten Resonators koaxiale Leitungen 3 und 4, die der Zuführung bzw. der Abnahme der elektrischen Energie dienen. Die Innenleiter dieser koaxialen Leitungen 3 und 4 sind ebenfalls, wie dies in Fig. 1 ohne weiteres zu erkennen ist, mit den metallischen Innenleitern 1 metallisch ver­ bunden, so daß eine als Anzapfung ausgebildete Ankopplung verwendet ist. In der vergrößerten Darstellung von Fig. 2 ist gut zu erkennen, daß der Innenleiter 1 selbst als so­ genanntes Semi-Rigid-Kabel ausgebildet ist. Es hat deshalb der Innenleiter 1 einen weiteren metallischen Innenleiter 6, der in bekannter Weise in einem dielektrischen Material 5 geführt ist. Die elektrische Wirkungsweise beruht darauf, daß das Semi-Rigid-Kabel 1, 5, 6 als Blindwiderstand für die einzelnen Resonatoren wirkt, weshalb die metallische Länge des Innenleiters 6 maßgebend für die Resonanzfrequenz ist. In Fig. 2 ist dies ebenfalls gut zu erkennen, insofern nämlich, als der metallische Innenleiter 6 zurückversetzt gezeichnet ist. Der metallische Innenleiter 6 muß nun mit dem Gehäuse 2 elektrisch leitend verbunden werden, was beispielsweise an der Stelle 7 in der Weise geschieht, daß der Innenleiter 6 und das Gehäuse 2 miteinander verlötet werden. Auch andere elektrische Kontakte sind an der Stelle 7 denkbar.In Fig. 1, a comb filter with five resonators can be seen, the inner conductor with the reference numeral 1 be distinguished. These inner conductors are metallic and be found in a metallic housing 2 , on which all metallic inner conductors are electrically conductively connected, for example soldered, on one side. In a known manner lead to the inner conductors of the first and last resonator coaxial lines 3 and 4 , which are used to supply or remove the electrical energy. The inner conductors of these coaxial lines 3 and 4 are also, as can be seen in Fig. 1 without further notice, with the metallic inner conductors 1 metallically connected, so that a coupling designed as a tap is used. In the enlarged representation of FIG. 2 it can be clearly seen that the inner conductor 1 itself is designed as a so-called semi-rigid cable. The inner conductor 1 therefore has a further metallic inner conductor 6 which is guided in a dielectric material 5 in a known manner. The electrical mode of operation is based on the fact that the semi-rigid cable 1 , 5 , 6 acts as a reactance for the individual resonators, which is why the metallic length of the inner conductor 6 is decisive for the resonance frequency. This can also be clearly seen in FIG. 2, to the extent that the metallic inner conductor 6 is shown set back. The metallic inner conductor 6 must now be electrically conductively connected to the housing 2 , which happens, for example, at point 7 in such a way that the inner conductor 6 and the housing 2 are soldered together. Other electrical contacts are also conceivable at point 7 .

Die Erfindung basiert also auf der Verwendung eines Semi- Rigid-Kabels als Innenleiter und Abstimmelement eines Kammleitungs- oder Interdigitalfilters bzw. eines Koaxial­ resonator-Filters (Fig. 1).The invention is therefore based on the use of a semi-rigid cable as the inner conductor and tuning element of a comb line or interdigital filter or a coaxial resonator filter ( FIG. 1).

Das Gehäuse besteht z.B. aus einem tiefgezogenen Blech­ kasten, der Deckel aus einem ebenen Blech, die Einzel­ teile werden z.B. weich gelötet.The housing is e.g. from a deep-drawn sheet box, the lid of a flat sheet, the single parts are e.g. soft soldered.

Den Innenleiter eines Resonators bildet der Außenleiter des Semi-Rigid-Kabels, während der Innenleiter des Semi- Rigid-Kabels als Resonanz-Abstimmelement verwendet wird (Fig. 2). Die Abstimmung erfolgt durch mehr oder weniger weites Herausziehen (Doppelpfeil 8) des Innenleiters des Semi-Rigid-Kabels.The inner conductor of a resonator is the outer conductor of the semi-rigid cable, while the inner conductor of the semi-rigid cable is used as a resonance tuning element ( FIG. 2). The adjustment is made by pulling the inner conductor of the semi-rigid cable out more or less (double arrow 8 ).

Diese Ausführung ist besonders kostengünstig, weil der Resonator-Innenleiter und das Abstimmelement aus handels­ üblichen Semi-Rigid-Kabeln mit beliebigem Wellenwider­ stand, vorzugsweise niederohmig, abgeschnitten werden können.This version is particularly inexpensive because of Resonator inner conductor and the tuning element from commercial usual semi-rigid cables with any wave resistance stood, preferably low impedance, are cut off can.

Die Erfindung kann sowohl für Filter mit unversteilerter als auch mit versteilerter Dämpfungscharakteristik und beliebiger Anzahl von Resonatoren verwendet werden.The invention can be used both for filters with undivided as well as with a distributed damping characteristic and any number of resonators can be used.

Die Ankopplung kann induktiv, kapazitiv oder als Anzapfung (Fig. 1) je nach technischer Anforderung ausgeführt wer­ den. Die Berechnung erfolgt nach den aus der Literatur bekannten Methoden, z.B. aus den eingangs angegebenen Literaturstellen.The coupling can be carried out inductively, capacitively or as a tap ( Fig. 1) depending on the technical requirements. The calculation is carried out according to the methods known from the literature, for example from the literature references specified at the beginning.

Claims (1)

Filter für sehr kurze elektromagnetische Wellen, die aus Koaxialleitungs-Resonatoren, aus interdigital oder kammar­ tig angeordneten leitungsgekoppelten Resonatoren (1, 2) be­ stehen, dadurch gekennzeichnet, daß die Innenleiter (1) dieser Resonatoren als Semi-Rigid- Kabel (1, 5, 6) (Kupferrohrkabel) ausgebildet sind, und daß das Abstimmelement dieser Resonatoren der Innenleiter (6) des Semi-Rigid-Kabels (1, 5, 6) ist.Filters for very short electromagnetic waves consisting of coaxial line resonators, interdigital or kammar term arranged line-coupled resonators ( 1 , 2 ), characterized in that the inner conductors ( 1 ) of these resonators as semi-rigid cables ( 1 , 5th , 6 ) (copper tube cable), and that the tuning element of these resonators is the inner conductor ( 6 ) of the semi-rigid cable ( 1 , 5 , 6 ).
DE19863604361 1986-02-12 1986-02-12 Filter for short electromagnetic waves - has resonator inner conductors as copper tube cables, whose inner conductor forms tuner Withdrawn DE3604361A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19863604361 DE3604361A1 (en) 1986-02-12 1986-02-12 Filter for short electromagnetic waves - has resonator inner conductors as copper tube cables, whose inner conductor forms tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19863604361 DE3604361A1 (en) 1986-02-12 1986-02-12 Filter for short electromagnetic waves - has resonator inner conductors as copper tube cables, whose inner conductor forms tuner

Publications (1)

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DE3604361A1 true DE3604361A1 (en) 1987-08-13

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DE19863604361 Withdrawn DE3604361A1 (en) 1986-02-12 1986-02-12 Filter for short electromagnetic waves - has resonator inner conductors as copper tube cables, whose inner conductor forms tuner

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19935666A1 (en) * 1999-07-29 2001-02-15 Daimler Chrysler Ag Analog-digital converter for a signal in the gigahertz range, millimeter wave receiver and bandpass filter for millimeter waves
CN104916888A (en) * 2015-05-14 2015-09-16 中国电子科技集团公司第四十一研究所 High-power filter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519524A (en) * 1947-08-13 1950-08-22 Hazeltine Research Inc Multiple-tuned wave-selector system
DE1221375B (en) * 1961-06-08 1966-07-21 Robert Bosch Elektronik Frequency-dependent electrical network for very high frequencies, such as frequency filters, crossovers or the like.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519524A (en) * 1947-08-13 1950-08-22 Hazeltine Research Inc Multiple-tuned wave-selector system
DE1221375B (en) * 1961-06-08 1966-07-21 Robert Bosch Elektronik Frequency-dependent electrical network for very high frequencies, such as frequency filters, crossovers or the like.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19935666A1 (en) * 1999-07-29 2001-02-15 Daimler Chrysler Ag Analog-digital converter for a signal in the gigahertz range, millimeter wave receiver and bandpass filter for millimeter waves
DE19935666C2 (en) * 1999-07-29 2002-08-29 Daimler Chrysler Ag Analog-digital converter for a signal in the gigahertz range, millimeter wave receiver and bandpass filter for millimeter waves
CN104916888A (en) * 2015-05-14 2015-09-16 中国电子科技集团公司第四十一研究所 High-power filter

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