EP0075498B1 - Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren - Google Patents

Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren Download PDF

Info

Publication number
EP0075498B1
EP0075498B1 EP19820401575 EP82401575A EP0075498B1 EP 0075498 B1 EP0075498 B1 EP 0075498B1 EP 19820401575 EP19820401575 EP 19820401575 EP 82401575 A EP82401575 A EP 82401575A EP 0075498 B1 EP0075498 B1 EP 0075498B1
Authority
EP
European Patent Office
Prior art keywords
slot
cavities
coupling
guide
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
Application number
EP19820401575
Other languages
English (en)
French (fr)
Other versions
EP0075498A1 (de
Inventor
Marie-Christine Henriot
Patrick Janer
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0075498A1 publication Critical patent/EP0075498A1/de
Application granted granted Critical
Publication of EP0075498B1 publication Critical patent/EP0075498B1/de
Expired legal-status Critical Current

Links

Images

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

Definitions

  • the present invention relates to band pass type cavity filters.
  • these filters are obtained by a series mounting of resonant cavities each tuned by a movable plunger (screw), the adjacent cavities being coupled together by irises or by rod curtains.
  • the coupling coefficient existing between two adjacent cavities is defined by the opening of the iris or the spacing between the rod curtains according to the technology used and can be adjusted by means of a coupling screw which modifies the susceptance presented by the iris or the curtain of stems.
  • Such filters have a symmetrical amplitude / frequency response, of the Chebchev type or of the Butterworth type.
  • a filter having at least 4 cavities is folded back on itself in the middle so as to present a wall common to its two folded parts; in addition to the series coupling of the cavities, at least one coupling between two non-adjacent cavities is carried out (in the sense of the series mounting of the cavities) by means of an iris drilled in the common wall, at the place where it separates the two cavities considered.
  • a description of these filters is given in an article written by John Rhodes published in the review "IEE Transactions on microwave theory and techniques" VoLMTT-18, No. 6, June 1970.
  • the present invention aims to avoid the aforementioned drawbacks.
  • the filter shown in fig. 1 is a bandpass type filter, produced in a waveguide of rectangular section, 1.
  • the incident signal enters through an access E located at one end 3 of the guide and exits through an access S located at the other end 4 of the guide.
  • the filter comprises a set of 6 cavities C1 to C6 arranged in series in the waveguide which is straight.
  • the cavities are delimited by plates V1 to V7, the dimensions of which are the same as those of the section of the filter and each plate is provided with an iris 11 to 17.
  • the iris 11 to 17 constitute the ports E and S of the filter .
  • These cavities which are mounted in series, are electrically coupled by means of the irises 12 to 16. These irises are all aligned and their dimensions are determined so that they each have a given susceptibility with respect to the incoming electromagnetic wave. . This susceptance defines the value of the coupling coefficient between each cavity.
  • the coupling coefficients are determined using coupling matrices according to conventional methods for calculating synthesis of the filters in order to obtain the desired characteristics in the desired bandwidth.
  • Screws q1 to q7, emerging from the waveguide, are screwed respectively through the coupling plates V1 to V7 to open into the irises 11 to 17; by driving them into the irises, the screws make it possible to adjust the coupling coefficient by slightly modifying the susceptance of the irises.
  • each cavity is adjusted using a tuning screw Q1 to Q6. All tuning screws are accessible for adjustment and are placed on the upper side of the filter.
  • a housing 5 provided with a screw 6 is fixed under the lower face, 2, of the filter against which it is attached.
  • a slit, L is cut, the length of which is determined by the distance which separates the cavities to be coupled in order to obtain a pseudo-elliptical response.
  • This slot L which goes from the cavity C2 to the cavity C5 is arranged parallel to the longitudinal edges of the guide and its ends are located respectively at the middle of the cavities C2 and C5 in order to maintain the symmetry of the response and to obtain a good performance, because the slot L behaves like a slot line or an antenna and allows part of the energy to pass directly from the cavity C2 to the cavity C5.
  • the ends of the slot have an enlarged part in the shape of T, B and B ', so as to amplify this phenomenon. Indeed, the widened slot ends make it possible to strongly couple the cavities C2 and C5 while there is practically no transfer of energy between the cavities C3 and C4 and the slot L due to the small width of the slot at the place where it cuts the bottom of these cavities.
  • This embodiment is improved by adding two small antennas A, A ', which radiate respectively inside the cavities C2 and C5.
  • Each antenna is constituted by a conducting wire, one of the ends of which is electrically connected to one end of the slot; A is connected to B and A 'is connected to B'.
  • the slit L results in bringing an infinite attenuation on two frequencies located outside the pass band of the filter.
  • the housing 5 of parallelepiped shape, shown in section in FIG. 3, is integral with the guide by its ends 8 and 9 which are welded respectively to the ends 3 and 4 of the guide.
  • Fig. 3 shows that the housing 5 has a large opening in its wall contiguous to the face 2 of the guide. This opening is significantly wider than the slot L and is located in front of this slot.
  • the box 5 makes it possible to guide the radiated energy coming from the slit and to limit a dispersion of this energy in space.
  • the wall of the housing 5 opposite the slot L is crossed by a screw, 6, accessible from the outside of the filter to allow frequency adjustment.
  • a screw, 6, accessible from the outside of the filter to allow frequency adjustment.
  • this screw, 6, is provided at its end with a plate 7 of dimension greater than that of the end of the screw 6, the screw 6 is screwed onto the housing 5 facing the slot L.
  • the driving in of the screw 6 deforms the electric field lines which are established around the slot L, which makes it possible to modify the coupling M 2 , 5 produced by the slot L.
  • the screw 6 makes it possible to increase or decrease the value of the coupling produced, which has the consequence of varying the frequency of the two weakening peaks obtained by the coupling of the cavities C2 and C5.
  • This frequency adjustment increases or decreases the value of the slopes of the filter response curve.
  • the closer the end of the screw 6 to the slot L the weaker the coupling and therefore the more the infinite weakening point moves away from the central frequency and the more the slopes become flat.
  • the farther the screw is from the slot the stronger the coupling and therefore the more the weakening point approaches the center frequency and the more the slopes stiffen.
  • the slot makes it possible to correct the out-of-band response of the filter without significantly modifying the characteristics in the bandwidth.
  • a filter with six blades that is to say with six cavities
  • a slot coupling to obtain the same steepness of slope for the amplitude / frequency response curve, as with an eight pale filter.
  • the coupling can be carried out with only one slot, that is to say without the antennas and without the housing or else with the slot and the antennas or the slot and the housing.
  • the screw 6 is not essential; the value of the coupling then results, for a given slot, from the choice of the distance between the slot and the wall of the housing opposite the slot.
  • housing 5 can be replaced by a simple metal plate placed at a suitable distance from the slot depending on the coupling and the shielding effect to be ensured.

Landscapes

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

Claims (5)

1. Wellenleiter-Filter, mit n Hohlräumen (C1-C6) (n ist mindestens gleich 3), die über n-1 primäre Koppelelemente (12-16) in Reihe gekoppelt sind, wobei die n Hohlräume in einem gemeinsamen rechteckigen geraden Wellenleiter (1) ausgebildet sind und wobei ein sekundäres Koppelelement (L) zwei in Richtung der Reihenkopplung nicht-benachbarte Hohlräume (C2, C5) miteinander koppelt, dadurch gekennzeichnet, dass das sekundäre Koppelelement einen Schlitz (L) aufweist, der im wesentlichen parallel zu den Längskanten des Wellenleiters liegt, wobei dieser Schlitz in eine der Seiten des Wellenleiters eingeschnitten ist und seine Enden (B, B') sich je in Höhe eines der beiden nicht-benachbarten zu koppelnden Hohlräume befinden.
2. Filter nach Anspruch 1, dadurch gekennzeichnet, dass der Schlitz (L) an seinen beiden Enden erweitert ist.
3. Filter nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass er zwei Antennen (A, A') aufweist, die aus zwei Leiterdrähten bestehen, deren erste Enden jeweils mit einem der Enden (B, B') des Schlitzes verbunden sind und je in einen der zwei nicht-benachbarten Hohlräume (C2, C5) eindringen.
4. Filter nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass er eine mit dem Wellenleiter fest verbundene und ausserhalb des Wellenleiters angeordnete Metallplatte (5) gegenüber dem Schlitz aufweist.
5. Filter nach Anspruch 4, dadurch gekennzeichnet, dass er eine Justierschraube (6) für die Justierung der sekundären Kopplung aufweist, wobei diese Schraube in die Metallplatte (5) im wesentlichen gegenüber der Mitte des Schlitzes (L) eingeschraubt ist.
EP19820401575 1981-09-04 1982-08-24 Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren Expired EP0075498B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8116873A FR2512593A1 (fr) 1981-09-04 1981-09-04 Filtre en guide d'onde
FR8116873 1981-09-04

Publications (2)

Publication Number Publication Date
EP0075498A1 EP0075498A1 (de) 1983-03-30
EP0075498B1 true EP0075498B1 (de) 1985-10-16

Family

ID=9261913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820401575 Expired EP0075498B1 (de) 1981-09-04 1982-08-24 Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren

Country Status (3)

Country Link
EP (1) EP0075498B1 (de)
DE (1) DE3266952D1 (de)
FR (1) FR2512593A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5534881A (en) * 1994-08-31 1996-07-09 Hughes Aircraft Company Microwave filter assembly having a nonsymmetrical waveguide and an antenna
FR2742262B1 (fr) * 1995-12-12 1998-01-09 Alcatel Telspace Filtre pseudo-elliptique dans le domaine millimetrique realise en technologie guide d'ondes
CA2231033A1 (en) * 1997-04-11 1998-10-11 Jose Luis Caceres Armendariz Microwave filter with coupling elements
DE19818947C1 (de) * 1998-04-28 1999-05-06 Bosch Gmbh Robert Bandpaß-Filter
US7263567B1 (en) 2000-09-25 2007-08-28 Intel Corporation Method and apparatus for lowering the die temperature of a microprocessor and maintaining the temperature below the die burn out
CN108832242B (zh) * 2018-06-07 2023-08-22 中国电子科技集团公司第五十五研究所 小型化w波段mems缝隙波导带通滤波器
CN113036364A (zh) * 2019-12-25 2021-06-25 深圳市大富科技股份有限公司 一种滤波器及通信设备
US11646477B2 (en) * 2021-03-03 2023-05-09 Meta Platforms, Inc. Waveguide cross-coupling filter with multiple parallel cavities

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697209A (en) * 1951-07-13 1954-12-14 Itt Tunable band pass filter
BE521895A (de) * 1952-08-02
DE1221737B (de) * 1955-06-24 1966-07-28 Marconi Co Ltd Im Zuge einer Hohlleitung eingefuegte, als Bandpass oder Bandsperre ausgebildete Anordnung fuer sehr kurze elektromagnetische Wellen
GB1199780A (en) * 1967-07-13 1970-07-22 Gen Electric & English Electri Improvements in or relating to Waveguide Filters
JPS5227244A (en) * 1975-08-26 1977-03-01 Nec Corp Microwave polarized bandpass filter
JPS52100955A (en) * 1976-02-20 1977-08-24 Nec Corp Microwave band-pass filter
DE3041625A1 (de) * 1980-11-05 1982-06-09 Standard Elektrik Lorenz Ag, 7000 Stuttgart Mikrowellenfilter

Also Published As

Publication number Publication date
FR2512593B1 (de) 1985-02-01
DE3266952D1 (en) 1985-11-21
FR2512593A1 (fr) 1983-03-11
EP0075498A1 (de) 1983-03-30

Similar Documents

Publication Publication Date Title
EP0047203B1 (de) Über eine grosse Bandbreite abstimmbares Mikrowellenfilter mit einem dielektrischen Resonator
EP3547450B1 (de) Strahlungselement mit kreispolarisierung, bei dem eine resonanz in einem fabry-perot-interferometer angewandt wird
EP0014115B1 (de) Abstimmbarer mit magnetostatischen Wellen arbeitender Hochfrequenzoszillator
EP0285503A1 (de) Filter mit Elementen mit verteilten Parametern, wobei zwei Arten von Kopplungsvorrichtungen vorhanden sind
EP2195877B1 (de) Omt-breitband- und multiband-/sende- und empfangs-/kopplungs- und trennvorrichtung für hochfrequenz-telekommunikationsantennen
FR3095303A1 (fr) Ecran polariseur a cellule(s) polarisante(s) radiofrequence(s) large bande
FR2578104A1 (fr) Filtre passe-bande pour hyperfrequences
EP0075498B1 (de) Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren
FR2546340A1 (fr) Filtre hyperfrequence coupe-bande accordable, de type coaxial, a resonateurs dielectriques
EP0098192B1 (de) Multiplexanordnung zum Zusammenfügen von zwei Frequenzbändern
FR2535547A1 (fr) Resonateurs bi-rubans et filtres realises a partir de ces resonateurs
FR2954596A1 (fr) Filtre micro-onde passe bande accordable en frequence
FR2569906A1 (fr) Reflecteur pour antenne a micro-ondes, muni d'une structure de grille a polarisation selective
EP0101369A1 (de) Banddurchlassfilter mit dielektrischen Resonatoren, mit negativer Kupplung zwischen Resonatoren
EP0127526A1 (de) Filtereinrichtung mit magnetostatischer Welle
FR2509537A1 (fr) Filtre passe-bande a resonateurs dielectriques
EP0649571B1 (de) Bandpassfilter mit gekoppelten resonatoren
Saleh An adjustable quasi-optical bandpass filter-Part II: Practical considerations
EP0018261B1 (de) Breitbandwellenleiter mit zwei Polarisationsrichtungen
EP0064458A1 (de) Bandpassfilter, ausgeführt in Rechteckhohlleitertechnik, mit hoher Selektivität
FR2487587A1 (fr) Filtre passe-bande hyperfrequence realise en guide d'ondes
FR2613538A1 (fr) Filtre hyperfrequence
FR3049775B1 (fr) Antenne v/uhf a rayonnement omnidirectionnel et balayant une large bande frequentielle
EP0534848A1 (de) Multikupplungsanordnung, insbesondere für einen Antennekombinierer
FR2546672A1 (fr) Dispositif selectif accordable a ondes magnetostatiques de volume

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE GB IT LI NL

17P Request for examination filed

Effective date: 19830806

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): CH DE GB IT LI NL

REF Corresponds to:

Ref document number: 3266952

Country of ref document: DE

Date of ref document: 19851121

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19900523

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900601

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19900626

Year of fee payment: 9

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19900831

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910824

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19910831

Ref country code: CH

Effective date: 19910831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19920301

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920501