EP1004149B1 - Filtre a guides d'ondes - Google Patents

Filtre a guides d'ondes Download PDF

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Publication number
EP1004149B1
EP1004149B1 EP98947357A EP98947357A EP1004149B1 EP 1004149 B1 EP1004149 B1 EP 1004149B1 EP 98947357 A EP98947357 A EP 98947357A EP 98947357 A EP98947357 A EP 98947357A EP 1004149 B1 EP1004149 B1 EP 1004149B1
Authority
EP
European Patent Office
Prior art keywords
waveguide
filter according
region
filter
waveguide filter
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
EP98947357A
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German (de)
English (en)
Other versions
EP1004149A1 (fr
Inventor
Wolfgang Hauth
Dietmar Schmitt
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.)
Tesat Spacecom GmbH and Co KG
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1004149A1 publication Critical patent/EP1004149A1/fr
Application granted granted Critical
Publication of EP1004149B1 publication Critical patent/EP1004149B1/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
    • H01P1/211—Waffle-iron filters; Corrugated structures

Definitions

  • the invention is based on a waveguide filter with a input side or output side Step transformer area as well as an area in the Height of alternating waveguide sections.
  • Such a waveguide filter is known from Microwave-Filters Impedance-Matching Networks and Coupling Structures, Matthaei, Young, Jones, Mc Graw Hill Book Company 1964, pages 398 to 408, in particular Figure 7.05-8 on page 405.
  • the area increases in height alternating waveguide sections there consists of a waffle iron filter structure.
  • step transformers are arranged with step areas, the length of each of which is ⁇ g / 4, where ⁇ g denotes the waveguide wavelength in the pass band.
  • a waveguide filter is known with step transformers on the input and output side and an intermediate area coupled Resonators in the form of a "corrugated waveguide filter" (Matthaei, Young, Jones, p. 358, 2nd paragraph) with Low pass behavior.
  • US-A-3597710 shows a waveguide filter which in Step transformer area on the input and output side resonators separated by capacitive shutters has different heights that are dense successive. Between these Step transformer areas are in height alternating waveguide sections are provided.
  • the waveguide filter with the measures of claim 1 allows the construction of waveguide filters with high Slope slopes and short overall length.
  • waveguide filters with a high slope are used with conventional "corrugated waveguide" filter structures realize.
  • the high number of elements would also increase a very high attenuation in the pass band, the especially unacceptable when used in satellites is.
  • Edge steepness consists in the use of additional relatively narrow-band notch filters.
  • waveguide band barriers either cavity resonators branching off from the waveguide are used, or ⁇ g '/ 4 long ( ⁇ g ' waveguide wavelength in the blocked region) and short-circuited stub lines at the end (Matthaei, Young, Jones; pages 725 to 768).
  • the distance between the resonators or stub lines is odd multiples of ⁇ g '/ 4. If, for example, three filter circuits were used, at least ⁇ g '/ 2 would be added to the total length of a conventional low-pass filter.
  • the width and depth of the restricted area in a more flexible manner Be adjusted in ways.
  • the waveguide filter according to the invention has a very short overall length.
  • the entire structure can be manufactured using cost-effective milling technology and, with suitable dimensions, does not require any adjustment elements.
  • the filter according to the invention is particularly suitable for the suppression of unwanted secondary signals from Wandering tubes in communications satellites as it is short Overall length both immediately above the pass band as well as in a very large frequency spacing Barrier damping delivers.
  • Waveguide sections can be called "corrugated waveguide” Web waveguide filter area (ridged waveguide) or as Waffle iron filter area can be designed.
  • the Design as a waffle iron filter area has the additional advantage that in the area of the second and third Harmonics are also attenuated signal components that spread in the form of higher waveguide modes.
  • the signals of the individual are in communication satellites Broadcast channels with the help of suitably connected narrowband Channel filter routed to a common busbar (Output multiplexer) and from there to the antenna guided.
  • Those used as transmit amplifiers However, traveling wave tubes produce in addition to the useful signal unwanted secondary signals (noise or harmonic of the Transmission signal), which is only in a greatly weakened form Antenna.
  • the channel filter is a bad one Have wide selection, additional low-pass filters be inserted in the transmission branch. Particularly high There are requirements for the blocking attenuation of these filters in the reception bands of the satellite, e.g. tapes II and III at 14 or 18 Ghz ( Figure 3).
  • Volume II is with current generation of satellites very close above Transmission band I, in which the low-pass filter its Passband has. At the transition to the restricted area an extremely high slope is therefore required. At the same time, the filter must also be used for the second one and third harmonics (bands IV and V) at 24 and 35 Ghz have a high blocking attenuation. All of these demands are to be observed with the filter according to the invention.
  • the filter according to the invention provides an optimal one Compromise between electrical and mechanical (mass, Volume) properties.
  • Figure 1 shows an example of a waveguide filter according to the invention in a longitudinal section. It consists of an input and an output-side step transformer area 1 or 3 and an intermediate area 2 consisting of a chain of short rectangular waveguide sections with alternating small and large heights, the small sections acting as parallel capacitors and the large ones as series inductors.
  • the step transformer areas 1 and 3 serve to adapt the waveguide to be connected, the dimensions of which are designed for the useful band.
  • a bandstop 4 or 5 is integrated according to the invention, which is preferably at a jump point of a step transformer - in the exemplary embodiment between the waveguide section of height b2 and the waveguide section b3, or accordingly between the waveguide section of height b5 and b6 - is arranged.
  • Such a bandstop preferably consists of geometrically closely spaced blocking members 41, 42, 43 or 51, 52, 53, here in the form of stub lines short-circuited at the end with a length of approximately ⁇ g '/ 4.
  • the waveguide low-pass filter shown in FIG. 1 can be, for example, an ordinary "corrugated filter” or preferably - as shown in Figure 2 - a waffle iron filter.
  • the waffle iron filter has the additional advantage that it also dampens signal components in the region of the second and third harmonics (bands IV and V in FIG. 3) which propagate in the form of higher waveguide modes.
  • Both filter types generally have a low input impedance, ie they are designed for the connection cross section ax b4, with b4 being significantly smaller than the further connection heights b1 and b6.
  • b4 being significantly smaller than the further connection heights b1 and b6.
  • the input and output locking elements each exhibit symmetrical locking behavior in pairs.
  • the lengths of the stub lines are shown asymmetrical.
  • Waffle iron filters can also be a Web waveguide filter structure (ridged waveguide) provided his.
  • the measures of the invention are not on applications limited for rectangular waveguides. So the invention also with filters in coaxial line technology, for example, the one from ANT messages Reports, Issue 2, December 1984, pages 36 to 41, in particular Figure 10, known filter type can be used.
  • Step transformer area are omitted, especially if the desired connecting waveguide in height with the input or Initial height of area 2 matches.

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  • Control Of Motors That Do Not Use Commutators (AREA)
  • Microwave Amplifiers (AREA)

Claims (12)

  1. Filtre à guide d'ondes comportant en entrée ou en sortie une zone de transformateurs à échelons (1, 3) ainsi qu'une zone avec des segments de guides d'ondes (2) de hauteurs alternées,
    caractérisé en ce que
    dans la zone de transformateurs à échelons (1, 3), on a intégré au moins un coupe-bande (4, 5) sous la forme d'au moins deux éléments de coupure (41, 42, 43 ; 51, 52, 53) qui se suivent étroitement et dont la distance respective est petite par rapport à un quart de la longueur d'ondes du guide d'ondes λg dans la plage passante.
  2. Filtre à guide d'ondes selon la revendication 1,
    caractérisé en ce que
    le coupe-bande (4, 5) est formé de conduites d'embranchement dont l'extrémité est court-circuitée et qui se succèdent de façon rapprochée.
  3. Filtre à guide d'ondes selon la revendication 2,
    caractérisé en ce que
    les conduites d'embranchement des éléments de coupure (41, 42, 43 ; 51, 52, 53) d'un coupe-bande ont des longueurs différentes.
  4. Filtre à guide d'ondes selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    les éléments de coupure (41, 42, 43 ; 51, 52, 53) sont prévus à la fois dans les zones d'entrée et de sortie des transformateurs à échelons (1, 3).
  5. Filtre à guide d'ondes selon l'une quelconque des revendications 2 à 4,
    caractérisé en ce que
    les conduites d'embranchement à extrémité court-circuitée ont une longueur de l'ordre de λg'/4, λg' représentant la longueur d'ondes de guides d'ondes dans la plage de coupure du coupe-bande.
  6. Filtre à guide d'ondes selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    les éléments de coupure (41, 42, 43 ; 51, 52, 53) sont prévus à la fois du côté de l'entrée et du côté de la sortie de la zone comportant des segments de guides d'ondes (2) de hauteurs alternées, et sont distants de cette zone d'une distance chaque fois de l'ordre de λg/4.
  7. Filtre à guide d'ondes selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    la zone de segments de guides d'ondes (2) de hauteurs alternées est réalisée sous la forme d'une zone de filtres à guides d'ondes à entretoises ou une zone de filtres à guides d'ondes en moule à gaufres.
  8. Filtre à guide d'ondes selon l'une des revendications 6 ou 7,
    caractérisé en ce que
    les éléments de coupure (41, 42, 43 ; 51, 52, 53) du côté de l'entrée ou de la sortie des coupe-bande ont chaque fois par paire un comportement de coupure symétrique.
  9. Filtre à guide d'ondes selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce que
    les éléments de coupure (41, 42, 43 ; 51, 52, 53) d'un coupe-bande (4) sont prévus à un point de rebond de la zone de transformateurs à échelons (1, 3) du côté de l'entrée ou du côté de la sortie.
  10. Filtre à guide d'ondes selon quelconque des revendications 1 à 8,
    caractérisé en ce que
    les éléments de coupure (41, 42, 43 ; 51, 52, 53) d'un coupe- bande (4) sont prévus à un point de rebond de la zone de transformateurs à échelons (1, 3) du côté de l'entrée et de la sortie.
  11. Application du filtre à guide d'ondes selon l'une quelconque des revendications 1 à 10,
    comme filtre passe-bas dans une branche d'émission d'un amplificateur de puissance à haute fréquence.
  12. Application du filtre à guide d'ondes selon la revendication 11, à des amplificateurs à ondes progressives pour des satellites à bandes d'émission et de réception relativement étroitement rapprochées.
EP98947357A 1997-08-21 1998-07-28 Filtre a guides d'ondes Expired - Lifetime EP1004149B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19736367A DE19736367A1 (de) 1997-08-21 1997-08-21 Hohlleiterfilter
DE19736367 1997-08-21
PCT/DE1998/002133 WO1999010947A1 (fr) 1997-08-21 1998-07-28 Filtre a guides d'ondes

Publications (2)

Publication Number Publication Date
EP1004149A1 EP1004149A1 (fr) 2000-05-31
EP1004149B1 true EP1004149B1 (fr) 2001-11-21

Family

ID=7839709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98947357A Expired - Lifetime EP1004149B1 (fr) 1997-08-21 1998-07-28 Filtre a guides d'ondes

Country Status (5)

Country Link
US (1) US6285267B1 (fr)
EP (1) EP1004149B1 (fr)
CA (1) CA2300937C (fr)
DE (2) DE19736367A1 (fr)
WO (1) WO1999010947A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6169466B1 (en) * 1999-05-10 2001-01-02 Com Dev Limited Corrugated waveguide filter having coupled resonator cavities
US7009469B2 (en) * 2002-06-28 2006-03-07 Harris Corporation Compact waveguide filter and method
JP2004164904A (ja) * 2002-11-11 2004-06-10 Nec Micro Hakan Kk 通信用電子管
FR2889358B1 (fr) * 2005-07-27 2009-06-05 Agence Spatiale Europeenne Filtre a elimination de bande a micro-ondes pour multiplexeur de sortie
JP4671905B2 (ja) * 2006-05-16 2011-04-20 日本無線株式会社 組合わせ導波管フィルタ
ES2335633B1 (es) 2008-01-21 2011-01-17 Tafco Metawireless, S.L. Filtro paso-bajo para señales electromagneticas.
US8598960B2 (en) 2009-01-29 2013-12-03 The Boeing Company Waveguide polarizers
EP2618421A1 (fr) * 2012-01-19 2013-07-24 Huawei Technologies Co., Ltd. Système à micro-ondes monté en surface
CN102709680B (zh) * 2012-06-19 2014-08-06 成都赛纳赛德科技有限公司 一种波导馈电缝隙天线
DE102012020576B4 (de) * 2012-10-22 2018-02-15 Tesat-Spacecom Gmbh & Co.Kg Mikrowellenfilter mit einstellbarer Bandbreite
RU2517397C1 (ru) * 2013-01-09 2014-05-27 Алексей Валентинович Палицин Волноводный фильтр верхних частот
US9531048B2 (en) * 2013-03-13 2016-12-27 Space Systems/Loral, Llc Mode filter
CN103531876A (zh) * 2013-10-25 2014-01-22 东南大学 高效表面等离子基元传输线
DE102015122895A1 (de) 2015-12-29 2017-06-29 Mician Global Engineering GbR (vertretungsberechtigter Gesellschafter Dr. Ralf Beyer, 28203 Bremen) Hohlleiterfilter, Multiplexer oder Demultiplexer mit einem Hohlleiterfilter, Verfahren zum Einstellen eines Hohlleiterfilters und Verfahren zum Aufteilen oder Kombinieren von Frequenzbereichen
CN108493545B (zh) * 2018-05-22 2020-10-23 电子科技大学中山学院 一种带矩形柱的华夫模谐波抑制器
CN108550968B (zh) * 2018-05-22 2020-10-23 电子科技大学中山学院 一种带凹坑的波导低通谐波抑制器
CN108808187A (zh) * 2018-06-05 2018-11-13 电子科技大学中山学院 一种单侧短路支节滤波器
CN112713371B (zh) * 2020-12-10 2022-03-04 北京无线电测量研究所 一种波导滤波器及其使用方法
CN119560750B (zh) * 2024-11-29 2025-10-10 南通大学 基于共享脊的腔体微波耦合器和毫米波滤波器集成结构

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
US3271706A (en) * 1964-12-07 1966-09-06 Gen Electric Microwave filter
US3597710A (en) 1969-11-28 1971-08-03 Microwave Dev Lab Inc Aperiodic tapered corrugated waveguide filter
US3845422A (en) * 1973-04-17 1974-10-29 Microwave Dev Labor Stop band filter
DE3483681D1 (de) * 1983-11-24 1991-01-10 Ant Nachrichtentech Mikrowellen-gegentaktfrequenzumsetzer.
CA1259676A (fr) 1986-12-04 1989-09-19 Chuck K. Mok Duplexeur 14-12 ghz
US5142255A (en) * 1990-05-07 1992-08-25 The Texas A&M University System Planar active endfire radiating elements and coplanar waveguide filters with wide electronic tuning bandwidth
US6169466B1 (en) * 1999-05-10 2001-01-02 Com Dev Limited Corrugated waveguide filter having coupled resonator cavities

Also Published As

Publication number Publication date
CA2300937C (fr) 2004-05-11
CA2300937A1 (fr) 1999-03-04
EP1004149A1 (fr) 2000-05-31
DE59802752D1 (de) 2002-02-21
US6285267B1 (en) 2001-09-04
WO1999010947A1 (fr) 1999-03-04
DE19736367A1 (de) 1999-02-25

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