EP0924791A1 - Bandpass filter - Google Patents
Bandpass filter Download PDFInfo
- Publication number
- EP0924791A1 EP0924791A1 EP98121958A EP98121958A EP0924791A1 EP 0924791 A1 EP0924791 A1 EP 0924791A1 EP 98121958 A EP98121958 A EP 98121958A EP 98121958 A EP98121958 A EP 98121958A EP 0924791 A1 EP0924791 A1 EP 0924791A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bandpass filter
- coupling
- filter according
- filter
- coupling plate
- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/007—Manufacturing frequency-selective devices
Definitions
- the invention relates to a bandpass filter made of n waveguide resonators (n ⁇ 2), each of which is adjacent via a common coupling plate mechanically connected and are electrically coupled via coupling slots and the the first and the nth resonator each closed by an end plate are.
- bandpass filters are known, but have the disadvantage that that the individual pipe sections over complex and expensive flange constructions connected or are closed, especially since such wet band filters from in the normal television bands (f ⁇ 1 GHz) working (digital) TV channels are used and are therefore very large.
- the invention has for its object a bandpass filter with a cheaper compared to the prior art To create a connecting structure for the resonators.
- the object is achieved in that everyone the pipe sections consist of a longitudinally welded sheet, that the end plates and the at least one coupling plate have tabs on their circumference, which on the respective pipe section or the adjacent pipe sections bent and are welded to this / these, and that the joints between the end plates and the at least one coupling plate on the one hand and the respective pipe section on the other are soldered.
- Such a bandpass filter is inexpensive to manufacture, nevertheless stable and has a low contact resistance between the individual pipe sections.
- the high stability is achieved by welding the pipe sections to the Coupling plates or reached with the end plate and the coupling plate.
- the low contact resistance between the individual Pipe sections and those arranged transversely to the central axis Sheets (end sheets and coupling sheets) achieved that the sheets and the respective pipe section the bumps are soldered. Expensive flanges are no longer required.
- the same advantages also result from a dual-mode bandpass filter with only one resonator that then has no coupling plates but only two end plates.
- This technique is arbitrary for bandpass filters made of waveguides Cross-section applicable. It can also be used on bandpass filters transmitted with coaxial resonators.
- the inputs and Coupling connections welded to the associated pipe section especially spot welded and the joints soldered (Claim 2). This is an inexpensive, however nevertheless stable connection technology.
- the common mechanical longitudinal axis advantageously runs of the resonators is essentially vertical and is the filter either fixed or floating, can be connected to a filter holder (Claim 3).
- a filter holder (Claim 3).
- Filters exposed to the slightest tension which is undesirable Deformations and thus detuning of the filter prevented.
- This is supported by the measure that the filter is connected to the filter carrier during operation is. Due to the floating attachment of the filter is a deformation of the filter due to different Extensions of the carrying structure and the filter largely locked out.
- the filter could be if the filter has high RF powers is acted upon and warmed up by different Thermal expansion of the filter and the support structure mechanical stresses and thus deformations of the Filters come, which would result in an upset.
- the filter is preferably fixed with a transport Filter carrier connected.
- the filter is preferably statically determined with the filter carrier connected.
- the respective horizontal leg can be connected to the filter carrier via a screw, which passes through an reversible spacer, each on both sides an approach for inclusion in a horizontal bore Has leg of the bracket, one approach the hole only partially, the other approach the hole completely penetrates (claim 4). So the attachment of the filter is particularly easy to move from the Operating position and vice versa from operating to Transport position are brought.
- Each mounting bracket can be connected to the pipe section of the concerned resonator via a parallel on its outer wall attached to its central axis rail be (claim 5). With this measure, the deformation of the filter can be further minimized. Also comes so the relatively high rigidity of the end plate and the coupling plate to the effect in which bending forces occur be introduced via the profile rail.
- the frequency can be adjusted in the coupling slots Alignment slide should be arranged, each of which formed as a slide guided in the slot in question is, of which at least one is the opposite Shorting bridge contacting slot edges carries and over a radial, in one to the level of the coupling plate parallel level rod adjustable from the outside is (claim 6). If the rod is made of metal, then the necessary external shielding is carried out by a resilient contact socket that connects to the resonator wall is connected by soldering.
- the pipe sections, the (the) Coupling plate (s) and the end plates made of one material small coefficient of thermal expansion.
- the material can be Invar, for example.
- the bandpass filter shown in Fig. 1 consists of four Round waveguide resonators 1, 2, 3 and 4.
- Each pipe section 1, 2, 3 and 4 consists of a rolled, parallel sheet metal welded to the central axis of the filter.
- the common mechanical longitudinal axis of the resonators runs in essentially vertical. So the filter is essentially supported without tension.
- the resonator 1 has a top End plate 5 and the resonator 4 has an end plate 6 below individual pipe sections are with each other via coupling plates 7 connected.
- the end plates 5 and 6 and the coupling plates 7 have bent tabs 8, which with the / the to the respective sheet metal adjacent pipe section (s) welded are. This ensures mechanical stability of the Bandpass filter.
- the joints between the metal sheets 5, 6 and between the coupling plates 7 on the one hand and the respective Pipe sections 1, 2, 3, 4 on the other hand are circumferential soldered to ensure the greatest possible contact security.
- Fig. 2 shows an example of the connection technology between the coupling plate 7 and the pipe sections 3 and 4. Shown is one of the bent tabs 8 of the coupling plate 7, which abut the circumference of the tube section 4 and with this are welded. At the points marked with arrows are the pipe sections 3 and 4 with the coupling plate 7 soldered, inside and outside.
- a coupling connection 9 is located on the circumference of the pipe section 3 and a coupling-out connection 10 on the circumference of the pipe section 2.
- Ports 9 and 10 are associated with the Pipe sections 3 and 2 spot welded. The bumps are soldered all around.
- adjustment screws 15 Located on the circumference of the individual pipe sections 1, 2, 3 and 4 adjustment elements, here in the form of adjustment screws 15.
- the bandpass filter has one connected to the pipe section 1 Mounting structure 13 for hanging the filter in the opening of a mounting plate 11.
- the mounting structure 13 comprises profile rails 12, which may occurring bending moments and loads essentially in Introduce the sheets 5 and 7.
- 3 to 5 show the suspension of the filter in one enlarged view.
- the rail 12 is one Tab 31 connected.
- the tab 31 has a bore 32, whose central axis with the central axis of a bore 33 Mounting plate 11 coincides.
- a screw 34 passes through the bore 32 and engages in a thread of the bore 33 a.
- Between the screw 34 and the tab 31 is a Spacer 37 arranged.
- the spacer 37 has on both sides, i.e. below and above, one each in the bore 32 of the Tab 31 matching approach 35 or 36. Approaches 35 and 36 have different heights. In Fig. 3, the Approach 36 partially bore 32 so that a gap between this approach 36 and the mounting plate 12th remains. This is the tab when screw 34 is tightened 31 and thus the filter firmly between the spacer 37 and the mounting plate 11 clamped.
- the spacer 37 is in the transport position.
- FIG. 4 shows the operating position of the spacer 37. This is turned in comparison to FIG. 3.
- the Approach 35 passes through the bore 32 completely, so that a narrower Gap between the spacer 37 and the tab 31 remains and the filter floating with the mounting plate 11 is connected. This ensures that the filter despite possibly different, e.g. temperature-influenced dilatations of pipe sections and mounting plate 11 tension-free is hung.
- FIG. 6 shows the coupling plate 7 with coupling slots 61.
- each coupling slot 61 is an in FIGS. 7 and 8, shown on an enlarged scale, adjustment slide 62 arranged.
- the adjustment slide 62 are for frequency adjustment by means of adjusting means shown schematically in FIG. 1 14 slidable.
- Each trim slide 62 carries a shorting bridge 71, the opposite Slit edges contacted.
- Fig. 9 shows the parallel to the central axis of the bandpass filter arranged longitudinal weld 91 of the pipe section 3.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
Die Erfindung betrifft ein Bandpaßfilter aus n Hohlleiter-Resonatoren (n ≥ 2), von denen die jeweils benachbarten über ein gemeinsames Koppelblech mechanisch miteinander verbunden und elektrisch über Koppelschlitze gekoppelt sind und der erste sowie der n-te Resonator durch je ein Endblech verschlossen sind.The invention relates to a bandpass filter made of n waveguide resonators (n ≥ 2), each of which is adjacent via a common coupling plate mechanically connected and are electrically coupled via coupling slots and the the first and the nth resonator each closed by an end plate are.
Solche Bandpaßfilter sind bekannt, haben jedoch den Nachteil, daß die einzelnen Rohrabschnitte über aufwendige und teure Flansch-Konstruktionen miteinander verbunden bzw. verschlossen sind, zumal solche Bandnaßfilter von in den normalen Fernsehbändern (f < 1 GHz) arbeitenden (digitalen) Fernsehsendern genutzt werden und daher sehr groß sind.Such bandpass filters are known, but have the disadvantage that that the individual pipe sections over complex and expensive flange constructions connected or are closed, especially since such wet band filters from in the normal television bands (f <1 GHz) working (digital) TV channels are used and are therefore very large.
Der Erfindung liegt die Aufgabe zugrunde, ein Bandpaßfilter mit einer im Vergleich zum Stand der Technik kostengünstigeren Verbindungskonstruktion für die Resonatoren zu schaffen.The invention has for its object a bandpass filter with a cheaper compared to the prior art To create a connecting structure for the resonators.
Erfindungsgemäß ist die Aufgabe dadurch gelöst, daß jeder der Rohrabschnitte aus einem längsgeschweißten Blech besteht, daß die Endbleche und das mindestens eine Koppelblech an ihrem Umfang Laschen haben, die auf den jeweiligen Rohrabschnitt bzw. die benachbarten Rohrabschnitte umgebogen und mit diesem/diesen verschweißt sind, und daß die Stöße zwischen den Endblechen sowie dem mindestens einen Koppelblech einerseits und dem jeweiligen Rohrabschnitt andererseits verlötet sind.According to the invention the object is achieved in that everyone the pipe sections consist of a longitudinally welded sheet, that the end plates and the at least one coupling plate have tabs on their circumference, which on the respective pipe section or the adjacent pipe sections bent and are welded to this / these, and that the joints between the end plates and the at least one coupling plate on the one hand and the respective pipe section on the other are soldered.
Ein solches Bandpaßfilter ist kostengünstig herzustellen, trotzdem stabil und weist einen geringen Übergangswiderstand zwischen den einzelnen Rohrabschnitten auf. Die hohe Stabilität wird durch das Verschweißen der Rohrabschnitte mit den Koppelblechen bzw. mit dem Endblech und dem Koppelblech erreicht. Der niedrige Übergangswiderstand zwischen den einzelnen Rohrabschnitten und den quer zur Mittelachse angeordneten Blechen (Endbleche und Koppelbleche) wird dadurch erreicht, daß die Bleche und der jeweilige Rohrabschnitt an den Stößen verlötet sind. Teure Flansche sind nicht mehr erforderlich. Die gleichen Vorteile ergeben sich auch bei einem Dualmode-Bandpaßfilter mit nur einem Resonator, der dann keine Koppel- sondern nur zwei Endbleche hat.Such a bandpass filter is inexpensive to manufacture, nevertheless stable and has a low contact resistance between the individual pipe sections. The high stability is achieved by welding the pipe sections to the Coupling plates or reached with the end plate and the coupling plate. The low contact resistance between the individual Pipe sections and those arranged transversely to the central axis Sheets (end sheets and coupling sheets) achieved that the sheets and the respective pipe section the bumps are soldered. Expensive flanges are no longer required. The same advantages also result from a dual-mode bandpass filter with only one resonator that then has no coupling plates but only two end plates.
Diese Technik ist bei Bandpaßfiltern aus Hohlleitern beliebigen Querschnitts anwendbar. Sie läßt sich auch auf Bandpaßfilter mit koaxialen Resonatoren übertragen.This technique is arbitrary for bandpass filters made of waveguides Cross-section applicable. It can also be used on bandpass filters transmitted with coaxial resonators.
Nach einer bevorzugten Ausführungsform sind die Ein- und Auskoppelanschlüsse mit dem zugehörigen Rohrabschnitt verschweißt, insbesondere punktverschweißt und die Stöße verlötet (Anspruch 2). Dies ist eine kostengünstige, aber trotzdem stabile Verbindungstechnik.According to a preferred embodiment, the inputs and Coupling connections welded to the associated pipe section, especially spot welded and the joints soldered (Claim 2). This is an inexpensive, however nevertheless stable connection technology.
Vorteilhaft verläuft die gemeinsame mechanische Längsachse der Resonatoren im wesentlichen vertikal und ist das Filter wahlweise fest oder schwimmend mit einem Filterträger verbindbar (Anspruch 3). In vertikaler Ausrichtung ist das Filter den geringsten Spannungen ausgesetzt, was unerwünschte Deformationen und damit Verstimmungen des Filters verhindert. Dies wird durch die Maßnahme unterstützt, daß das Filter im Betrieb schwimmend mit dem Filterträger verbunden ist. Durch die schwimmende Befestigung des Filters wird eine Deformation des Filters infolge unterschiedlicher Dilatationen der Tragestruktur und des Filters weitgehend ausgeschlossen. Wäre das Filter fest mit dem Filterträger verbunden, könnte es, wenn das Filter mit hohen HF-Leistungen beaufschlagt wird und sich erwärmt, durch unterschiedliche Wärmedehnungen des Filters und der Tragestruktur zu mechanischen Spannungen und damit zu Deformationen des Filters kommen, was eine Verstimmung zur Folge hätte. Zum Transport wird das Filter jedoch vorzugsweise fest mit einem Filterträger verbunden.The common mechanical longitudinal axis advantageously runs of the resonators is essentially vertical and is the filter either fixed or floating, can be connected to a filter holder (Claim 3). In a vertical orientation, that is Filters exposed to the slightest tension, which is undesirable Deformations and thus detuning of the filter prevented. This is supported by the measure that the filter is connected to the filter carrier during operation is. Due to the floating attachment of the filter is a deformation of the filter due to different Extensions of the carrying structure and the filter largely locked out. If the filter were fixed with the filter holder connected, it could be if the filter has high RF powers is acted upon and warmed up by different Thermal expansion of the filter and the support structure mechanical stresses and thus deformations of the Filters come, which would result in an upset. To the However, the filter is preferably fixed with a transport Filter carrier connected.
Bevorzugt ist das Filter statisch bestimmt mit dem Filterträger verbunden. Hierzu kann z.B. der Rohrabschnitt eines der Resonatoren an seinem Umfang mit Befestigungslaschen versehen sein, deren jeweiliger horizontaler Schenkel mit dem Filterträger über eine Schraube verbindbar ist, die ein wendbares Distanzstück durchgreift, das beidseits je einen Ansatz zur Aufnahme in einer Bohrung des horizontalen Schenkels des Befestigungswinkels hat, wobei der eine Ansatz die Bohrung nur teilweise, der andere Ansatz die Bohrung vollständig durchgreift (Anspruch 4). So kann die Befestigung des Filters besonders leicht von der Transport- in die Betriebsstellung und umgekehrt von der Betriebs- in die Transportstellung gebracht werden.The filter is preferably statically determined with the filter carrier connected. For this, e.g. the pipe section one of the resonators on its circumference with fastening tabs be provided, the respective horizontal leg can be connected to the filter carrier via a screw, which passes through an reversible spacer, each on both sides an approach for inclusion in a horizontal bore Has leg of the bracket, one approach the hole only partially, the other approach the hole completely penetrates (claim 4). So the attachment of the filter is particularly easy to move from the Operating position and vice versa from operating to Transport position are brought.
Jede Befestigungslasche kann mit dem Rohrabschnitt des betreffenden Resonators über eine an dessen Außenwand parallel zu seiner Mittelachse befestigte Profilschiene verbunden sein (Anspruch 5). Mit dieser Maßnahme kann die Deformation des Filters weiter minimiert werden. Zudem kommt so die relativ hohe Steifigkeit der Endplatte und des Koppelbleches zur Wirkung, in welche auftretende Biegekräfte über die Profilschiene eingeleitet werden.Each mounting bracket can be connected to the pipe section of the concerned resonator via a parallel on its outer wall attached to its central axis rail be (claim 5). With this measure, the deformation of the filter can be further minimized. Also comes so the relatively high rigidity of the end plate and the coupling plate to the effect in which bending forces occur be introduced via the profile rail.
Zum Frequenzabgleich des Filters können in den Koppelschlitzen Abgleichschieber angeordnet sein, von denen jeder als in den betreffenden Schlitz geführter Schlitten ausgebildet ist, von denen zumindest einer eine die gegenüberliegenden Schlitzränder kontaktierende Kurzschlußbrücke trägt und über eine radiale, in einer zur Ebene des Koppelblechs parallelen Ebene angeordnete Stange von außen verstellbar ist (Anspruch 6). Besteht die Stange aus Metall, dann erfolgt die nötige Abschirmung nach außen durch jeweils eine federnde Kontaktbuchse, die mit der Resonatorwand löttechnisch verbunden ist.The frequency can be adjusted in the coupling slots Alignment slide should be arranged, each of which formed as a slide guided in the slot in question is, of which at least one is the opposite Shorting bridge contacting slot edges carries and over a radial, in one to the level of the coupling plate parallel level rod adjustable from the outside is (claim 6). If the rod is made of metal, then the necessary external shielding is carried out by a resilient contact socket that connects to the resonator wall is connected by soldering.
Vorteihaft bestehen zumindest die Rohrabschnitte, das (die) Koppelblech(e) und die Endbleche aus einem Werkstoff mit kleinem thermischen Ausdehnungskoeffizienten. Der Werkstoff kann beispielsweise Invar sein.Advantageously, there are at least the pipe sections, the (the) Coupling plate (s) and the end plates made of one material small coefficient of thermal expansion. The material can be Invar, for example.
Ein Ausführungsbeispiel des Bandpaßfilters nach der Erfindung ist in der Zeichnung schematisch vereinfacht dargestellt. Es zeigt
- Fig. 1
- die Seitenansicht eines Bandpaßfilters nach der Erfindung;
- Fig. 2
- einen Schnitt entlang der Linie A-A in Fig. 1;
- Fig. 3
- den Bereich X in Fig. 1 in einer vergrößerten Darstellung, wobei das Filter transportgesichert ist;
- Fig. 4
- den in Fig. 3 dargestellten Bereich, wobei das Filter schwimmend aufgehängt ist;
- Fig. 5
- eine Aufsicht auf die in den Fig. 3 und 4 dargestellte Haltekonstruktion.
- Fig. 6
- einen Schnitt entlang der Linie C-C in Fig. 1;
- Fig. 7
- den Bereich Y in Fig. 6 in einer vergrößerten Darstellung;
- Fig. 8
- einen Teilschnitt entlang der Linie I-I in Fig. 7;
- Fig. 9
- den Bereich Z in Fig. 6 in einer vergrößerten Darstellung;
- Fig. 1
- the side view of a bandpass filter according to the invention;
- Fig. 2
- a section along the line AA in Fig. 1;
- Fig. 3
- the area X in Figure 1 in an enlarged view, the filter is secured for transport.
- Fig. 4
- the area shown in Figure 3, the filter is suspended floating;
- Fig. 5
- a plan view of the holding structure shown in Figs. 3 and 4.
- Fig. 6
- a section along the line CC in Fig. 1;
- Fig. 7
- the area Y in Figure 6 in an enlarged view.
- Fig. 8
- a partial section along the line II in Fig. 7;
- Fig. 9
- the area Z in Figure 6 in an enlarged view.
Das in Fig. 1 dargestellte Bandpaßfilter besteht aus vier
Rundhohlleiter-Resonatoren 1, 2, 3 und 4. Jeder Rohrabschnitt
1, 2, 3 und 4 besteht aus einem rollierten, parallel
zur Mittelachse des Filters verschweißten Blech. Die gemeinsame
mechanische Längsachse der Resonatoren verläuft im
wesentlichen vertikal. So ist das Filter im wesentlichen
spannungsfrei abgestützt. Der Resonator 1 hat oben ein
Endblech 5 und der Resonator 4 hat unten ein Endblech 6. Die
einzelnen Rohrabschnitte sind über Koppelbleche 7 miteinander
verbunden. Die Endbleche 5 und 6 sowie die Koppelbleche
7 haben umgebogene Laschen 8, die mit dem/den an das
jeweilige Blech angrenzenden Rohrabschnitt(en) verschweißt
sind. Dies gewährleistet eine mechanische Stabilität des
Bandpaßfilters. Die Stöße zwischen den Enblechen 5, 6 sowie
zwischen den Koppelblechen 7 einerseits und den jeweiligen
Rohrabschnitten 1, 2, 3, 4 andererseits sind umlaufend
verlötet, um größtmögliche Kontaktsicherheit zu gewährleisten.The bandpass filter shown in Fig. 1 consists of four
Fig. 2 zeigt beispielhaft die Verbindungstechnik zwischen
dem Koppelblech 7 und den Rohrabschnitten 3 und 4. Dargestellt
ist eine der umgebogenen Laschen 8 des Koppelblechs
7, die am Umfang des Rohrabschnitts 4 anliegen und mit
diesem verschweißt sind. An den mit Pfeilen markierten Stellen
sind die Rohrabschnitte 3 und 4 mit dem Koppelblech 7
verlötet, und zwar innen und außen.Fig. 2 shows an example of the connection technology between
the
Ein Einkoppelanschluß 9 befindet sich am Umfang des Rohrabschnitts
3 und ein Auskoppelanschluß 10 am Umfang des Rohrabschnitts
2. Die Anschlüsse 9 und 10 sind mit den zugehörigen
Rohrabschnitten 3 und 2 punktverschweißt. Die Stöße sind
umlaufend verlötet.A
Am Umfang der einzelnen Rohrabschnitte 1, 2, 3 und 4 befinden
sich Abgleichelemente, hier in Form von Abgleichschrauben
15.Located on the circumference of the
Das Bandpaßfilter hat eine mit dem Rohrabschnitt 1 verbundene
Befestigungskonstruktion 13 zur Aufhängung des Filters
in der Öffnung einer Befestigungsplatte 11. Die Befestigungskonstruktion
13 umfaßt Profilschienen 12, welche ggf.
auftretende Biegemomente und Belastungen im wesentlichen in
die Bleche 5 und 7 einleiten.The bandpass filter has one connected to the
Fig. 3 bis 5 zeigen die Aufhängung des Filters in einer
vergrößerten Darstellung. Mit der Profilschiene 12 ist eine
Lasche 31 verbunden. Die Lasche 31 hat eine Bohrung 32,
deren Mittelachse mit der Mittelachse einer Bohrung 33 der
Befestigungsplatte 11 zusammenfällt. Eine Schraube 34 durchgreift
die Bohrung 32 und greift in ein Gewinde der Bohrung
33 ein. Zwischen der Schraube 34 und der Lasche 31 ist ein
Distanzstuck 37 angeordnet. Das Distanzstück 37 hat beidseitig,
d.h. unten und oben, je einen in die Bohrung 32 der
Lasche 31 passenden Ansatz 35 bzw. 36. Die Ansätze 35 und 36
haben eine unterschiedliche Höhe. In Fig. 3 durchgreift der
Ansatz 36 die Bohrung 32 teilweise, so daß ein Spalt
zwischen diesem Ansatz 36 und der Befestigungsplatte 12
verbleibt. Damit ist bei angezogener Schraube 34 die Lasche
31 und damit das Filter fest zwischen dem Distanzstück 37
und der Befestigungsplatte 11 eingespannt. Das Distanzstück
37 befindet sich so in Transportstellung.3 to 5 show the suspension of the filter in one
enlarged view. With the
Fig. 4 zeigt die Betriebstellung des Distanzstückes 37.
Dieses ist im Vergleich zu Fig. 3 gewendet. Der Ansatz 35
durchgreift die Bohrung 32 vollständig, so daß ein schmaler
Spalt zwischen dem Distanzstück 37 und der Lasche 31 verbleibt
und das Filter schwimmend mit der Befestigungsplatte
11 verbunden ist. Dies gewährleistet, daß das Filter trotz
ggf. unterschiedlicher, z.B. temperaturbeeinflußter Dilatationen
von Rohrabschnitten und Befestigungsplatte 11 spannungsfrei
aufgehängt ist.4 shows the operating position of the
Der in Fig. 6 dargestellte Schnitt zeigt das Koppelblech 7
mit Koppelschlitzen 61. In jedem Koppelschlitz 61 ist ein in
Fig. 7 und 8 vergrößert dargestellter Abgleichschieber 62
angeordnet. Die Abgleichschieber 62 sind zum Frequenzabgleich
mittels in Fig. 1 schematisch dargestellten Verstellmitteln
14 verschiebbar. Jeder Abgleichschieber 62
trägt eine Kurzschlußbrücke 71, die gegenüberliegende
Schlitzränder kontaktiert.The section shown in FIG. 6 shows the
Fig. 9 zeigt die parallel zur Mittelachse des Bandpaßfilters
angeordnete Längsschweißnaht 91 des Rohrabschnitts 3.Fig. 9 shows the parallel to the central axis of the bandpass filter
arranged
Claims (7)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19755744 | 1997-12-16 | ||
| DE19755744 | 1997-12-16 | ||
| DE19832804A DE19832804C2 (en) | 1997-12-16 | 1998-07-21 | Bandpass filter |
| DE19832804 | 1998-07-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0924791A1 true EP0924791A1 (en) | 1999-06-23 |
| EP0924791B1 EP0924791B1 (en) | 2004-03-03 |
Family
ID=26042485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98121958A Expired - Lifetime EP0924791B1 (en) | 1997-12-16 | 1998-11-19 | Bandpass filter |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6294970B1 (en) |
| EP (1) | EP0924791B1 (en) |
| JP (1) | JPH11274814A (en) |
| AT (1) | ATE261194T1 (en) |
| AU (1) | AU724691B2 (en) |
| ES (1) | ES2216233T3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPQ481399A0 (en) * | 1999-12-23 | 2000-02-03 | Alcatel | An adjustable coupling arrangement for aperture coupled cavity filters |
| WO2016106638A1 (en) * | 2014-12-31 | 2016-07-07 | 深圳市大富科技股份有限公司 | Cavity filter and connector thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1808474A1 (en) * | 1968-11-13 | 1970-05-21 | Standard Elek K Lorenz Ag | Process for manufacturing a rectangular waveguide filter |
| DE2748290B1 (en) * | 1977-10-27 | 1979-01-18 | Siemens Ag | Process for the manufacture of microwave filters |
| JPS60233903A (en) * | 1984-05-07 | 1985-11-20 | Mitsubishi Electric Corp | Manufacture of microwave resonance cavity |
| US4701728A (en) * | 1985-09-06 | 1987-10-20 | Alps Electric Co., Ltd. | Waveguide filter |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4028651A (en) * | 1976-05-06 | 1977-06-07 | Hughes Aircraft Company | Coupled-cavity microwave filter |
| CA1153432A (en) * | 1982-08-25 | 1983-09-06 | James B. Dorey | Bandpass filter with plurality of wave-guide cavities |
| FR2541826B1 (en) * | 1983-02-25 | 1985-07-05 | Thomson Csf | PROCESS FOR MANUFACTURING A MICROWAVE CAVITY AND CAVITY OBTAINED THEREBY |
| JP3339223B2 (en) * | 1994-12-26 | 2002-10-28 | 株式会社村田製作所 | Dielectric resonator device |
| US5841330A (en) * | 1995-03-23 | 1998-11-24 | Bartley Machines & Manufacturing | Series coupled filters where the first filter is a dielectric resonator filter with cross-coupling |
-
1998
- 1998-11-19 EP EP98121958A patent/EP0924791B1/en not_active Expired - Lifetime
- 1998-11-19 AT AT98121958T patent/ATE261194T1/en not_active IP Right Cessation
- 1998-11-19 ES ES98121958T patent/ES2216233T3/en not_active Expired - Lifetime
- 1998-12-11 US US09/210,495 patent/US6294970B1/en not_active Expired - Fee Related
- 1998-12-11 JP JP10352992A patent/JPH11274814A/en not_active Ceased
- 1998-12-15 AU AU97102/98A patent/AU724691B2/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1808474A1 (en) * | 1968-11-13 | 1970-05-21 | Standard Elek K Lorenz Ag | Process for manufacturing a rectangular waveguide filter |
| DE2748290B1 (en) * | 1977-10-27 | 1979-01-18 | Siemens Ag | Process for the manufacture of microwave filters |
| JPS60233903A (en) * | 1984-05-07 | 1985-11-20 | Mitsubishi Electric Corp | Manufacture of microwave resonance cavity |
| US4701728A (en) * | 1985-09-06 | 1987-10-20 | Alps Electric Co., Ltd. | Waveguide filter |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 10, no. 91 (E - 394) 9 April 1986 (1986-04-09) * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE261194T1 (en) | 2004-03-15 |
| AU9710298A (en) | 1999-07-08 |
| ES2216233T3 (en) | 2004-10-16 |
| JPH11274814A (en) | 1999-10-08 |
| US6294970B1 (en) | 2001-09-25 |
| EP0924791B1 (en) | 2004-03-03 |
| AU724691B2 (en) | 2000-09-28 |
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