EP0924791B1 - Filtre passe-bande - Google Patents

Filtre passe-bande Download PDF

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Publication number
EP0924791B1
EP0924791B1 EP98121958A EP98121958A EP0924791B1 EP 0924791 B1 EP0924791 B1 EP 0924791B1 EP 98121958 A EP98121958 A EP 98121958A EP 98121958 A EP98121958 A EP 98121958A EP 0924791 B1 EP0924791 B1 EP 0924791B1
Authority
EP
European Patent Office
Prior art keywords
filter
band
pass filter
coupling plate
welded
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 - Lifetime
Application number
EP98121958A
Other languages
German (de)
English (en)
Other versions
EP0924791A1 (fr
Inventor
Franz Dr.-Ing. Pitschi
Manfred Dr. Lang
Werner Appel
Hans Pinzel
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.)
Spinner GmbH
Original Assignee
Spinner GmbH
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
Priority claimed from DE19832804A external-priority patent/DE19832804C2/de
Application filed by Spinner GmbH filed Critical Spinner GmbH
Publication of EP0924791A1 publication Critical patent/EP0924791A1/fr
Application granted granted Critical
Publication of EP0924791B1 publication Critical patent/EP0924791B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 bandpass filters 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 plates and coupling plates) 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). In the vertical direction it 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 too 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.
  • 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 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 pipe 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.
  • 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 includes profile rails 12, which may occurring bending moments and loads essentially in Introduce sheets 5 and 7.
  • 3 to 5 show the suspension of the filter in one enlarged view.
  • the profile 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.
  • 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.
  • the section shown in FIG. 6 shows the coupling plate 7 with coupling slots 61.
  • each coupling slot 61 is an in 7 and 8 enlarged 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Claims (7)

  1. Filtre passe-bande composé de n résonateurs à guide d'onde (n ≥ 2) (1, 2, 3, 4) dont les voisins respectifs sont reliés l'un avec l'autre mécaniquement par l'intermédiaire d'une tôle de couplage (7) commune et électriquement par l'intermédiaire de fentes de couplage (61) et le premier (1) ainsi que le n-ième (4) résonateur sont fermés chacun par une tôle d'extrémité (5, 6), caractérisé en ce que chacun des segments de tube (1, 2, 3, 4) se compose d'une tôle soudée longitudinalement, en ce que les tôles d'extrémité (5, 6) et la ou les tôle(s) de couplage (7) possèdent sur leur circonférence des pattes (8) qui sont repliées sur le segment de tube correspondant ou sur les segments de tube voisins et soudées avec celui-ci ou ceux-ci, et en ce que les joints entre les tôles d'extrémité (5, 6) ainsi qu'entre la ou les tôle(s) de couplage (7) d'une part et le segment de tube (1, 2, 3, 4) respectif d'autre part sont brasés.
  2. Filtre passe-bande selon la revendication 1, caractérisé en ce que les raccords d'accouplement et de désaccouplement (9, 10) sont soudés avec le segment de tube (3, 2) correspondant, en particulier soudés par points, et en ce que les joints sont brasés.
  3. Filtre passe-bande selon la revendication 1 ou la revendication 2, caractérisé en ce que l'axe longitudinal mécanique commun des résonateurs (1, 2, 3, 4) est orienté sensiblement à la verticale et en ce que le filtre peut être relié au choix de manière fixe ou flottante avec un support de filtre (11).
  4. Filtre passe-bande selon l'une des revendications 1 à 3, caractérisé en ce que le segment de tube d'un des résonateurs (1) est muni sur sa circonférence de pattes de fixation dont la branche horizontale (31) respective peut être reliée au support de filtre (11) au moyen d'une vis (34) qui pénètre dans une pièce d'écartement pouvant tourner (37) qui possède de chaque côté un téton (35, 36) destiné à être reçu dans un perçage (32) de la branche horizontale (31) de l'équerre de fixation, l'un des tétons (36) pénétrant seulement en partie dans le perçage et l'autre téton (35) pénétrant en totalité dans le perçage.
  5. Filtre passe-bande selon la revendication 4, caractérisé en ce que chaque patte de fixation (31) est reliée au segment de tube du résonateur (1) concerné par l'intermédiaire d'un rail profilé (12) fixé sur sa paroi extérieure parallèlement à son axe médian.
  6. Filtre passe-bande selon l'une des revendications 1 à 5, caractérisé en ce que des glissières d'accord (62) sont disposées dans les fentes de couplage (31), chacune d'entre elles étant réalisée sous la forme de curseurs guidés dans la fente concernée et dont l'un au moins porte un shunt de court-circuit (71) mettant en contact les bords opposés de la fente et peut être déplacé de l'extérieur au moyen d'une tige (14) radiale disposée dans un plan parallèle au plan de la tôle de couplage (7).
  7. Filtre passe-bande selon l'une des revendications 1 à 6, caractérisé en ce qu'au moins les segments de tube (1, 2, 3, 4), la ou les tôles de couplage (7) et les tôles d'extrémité (5, 6) sont constitués par un matériau ayant un faible coefficient de dilatation thermique.
EP98121958A 1997-12-16 1998-11-19 Filtre passe-bande Expired - Lifetime EP0924791B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19755744 1997-12-16
DE19755744 1997-12-16
DE19832804A DE19832804C2 (de) 1997-12-16 1998-07-21 Bandpaßfilter
DE19832804 1998-07-21

Publications (2)

Publication Number Publication Date
EP0924791A1 EP0924791A1 (fr) 1999-06-23
EP0924791B1 true EP0924791B1 (fr) 2004-03-03

Family

ID=26042485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121958A Expired - Lifetime EP0924791B1 (fr) 1997-12-16 1998-11-19 Filtre passe-bande

Country Status (6)

Country Link
US (1) US6294970B1 (fr)
EP (1) EP0924791B1 (fr)
JP (1) JPH11274814A (fr)
AT (1) ATE261194T1 (fr)
AU (1) AU724691B2 (fr)
ES (1) ES2216233T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107112652A (zh) * 2014-12-31 2017-08-29 深圳市大富科技股份有限公司 腔体滤波器及其连接器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1808474B2 (de) * 1968-11-13 1971-11-11 Verfahren zur herstellung eines rechteckigen hohlleiterfilters
US4028651A (en) * 1976-05-06 1977-06-07 Hughes Aircraft Company Coupled-cavity microwave filter
DE2748290C2 (de) * 1977-10-27 1979-09-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zur Herstellung von Mikrowellenfiltern
CA1153432A (fr) * 1982-08-25 1983-09-06 James B. Dorey Filtre passe-bande ayant un grand nombre de cavites de guide d'ondes
FR2541826B1 (fr) * 1983-02-25 1985-07-05 Thomson Csf Procede de fabrication d'une cavite hyperfrequence et cavite obtenue par ce procede
JPS60233903A (ja) * 1984-05-07 1985-11-20 Mitsubishi Electric Corp マイクロ波共振空胴の製造方法
US4701728A (en) * 1985-09-06 1987-10-20 Alps Electric Co., Ltd. Waveguide filter
JP3339223B2 (ja) * 1994-12-26 2002-10-28 株式会社村田製作所 誘電体共振器装置
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107112652A (zh) * 2014-12-31 2017-08-29 深圳市大富科技股份有限公司 腔体滤波器及其连接器
CN107112652B (zh) * 2014-12-31 2019-07-26 深圳市大富科技股份有限公司 腔体滤波器及其连接器

Also Published As

Publication number Publication date
US6294970B1 (en) 2001-09-25
AU9710298A (en) 1999-07-08
ES2216233T3 (es) 2004-10-16
EP0924791A1 (fr) 1999-06-23
JPH11274814A (ja) 1999-10-08
AU724691B2 (en) 2000-09-28
ATE261194T1 (de) 2004-03-15

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