EP0045242A1 - Filtre passe-bande hyperfréquence réalisé en guide d'ondes - Google Patents

Filtre passe-bande hyperfréquence réalisé en guide d'ondes Download PDF

Info

Publication number
EP0045242A1
EP0045242A1 EP81401153A EP81401153A EP0045242A1 EP 0045242 A1 EP0045242 A1 EP 0045242A1 EP 81401153 A EP81401153 A EP 81401153A EP 81401153 A EP81401153 A EP 81401153A EP 0045242 A1 EP0045242 A1 EP 0045242A1
Authority
EP
European Patent Office
Prior art keywords
bandpass filter
waveguide
section
filter
resonant
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Withdrawn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
EP81401153A
Other languages
German (de)
English (en)
French (fr)
Inventor
Gilles Sillard
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 EP0045242A1 publication Critical patent/EP0045242A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a microwave bandpass filter made as a waveguide and having a very small footprint.
  • a bandpass filter is a device allowing the transmission, without power attenuation, of a signal whose frequency is located in a determined frequency band, but strongly attenuating the power of signals whose frequency is outside this band.
  • a microwave bandpass filter produced as a waveguide is constituted either by a series of resonators coupled together or by a series of resonant iris generally connected together.
  • these are coupled either by transmission lines or directly.
  • a resonator being produced from a transmission line closed at its two ends by susceptances, the value and the length of the line are determined as a function of the overvoltage coefficient, the different resonators constituting the filter are coupled either by transmission lines each placed between the susceptances of two resonators and of length equal to a quarter of the wavelength at the resonant frequency, or directly.
  • a resonator is coupled to the adjacent resonator by a single susceptance of determined value equivalent to the two extreme susceptances of the two resonators and to the coupling line.
  • a susceptance is achieved using bars or metal shutters located in a straight section of the guide, symmetrically on either side of the median axis of the section or by a central flap.
  • the frequency response of the filter is fixed by the distribution of the overvoltage coefficients of the various resonators constituting it.
  • a bandpass filter can also be constituted by a series of resonant irises, as has been said before, coupled together by transmission lines of length equal to a quarter of the wavelength at the center frequency of the filter operating band.
  • the dimensions of these irises are such that at their resonant frequency, the largest of these dimensions is equal to half the wavelength ⁇ .
  • a drawback of this kind of filter is the excessively large dimensions due to the transmission lines which the object of the invention aims to remedy.
  • the microwave bandpass filter produced as a waveguide is formed in a single cross section of the guide by at least one resonant window whose dimensions and position relative to two orthogonal planes of symmetry of the window depends on the width of the filter bandwidth.
  • This kind of filter is very bulky. This is why the invention aims to remedy this by producing a bandpass filter of considerably reduced dimensions as shown in FIG. 2, for example.
  • This waveguide filter consists, in a single cross section 8 of the guide 9, by a resonant window 10 whose shape is given by way of example and is not limiting.
  • the dimensions, in this case I 1 , I 2 , I 3 , h 1 and h 2 , as well as the position of the window relative to the two orthogonal planes of symmetry ⁇ 3 and ⁇ 4 determine the filter overvoltage coefficient .
  • This resonant window 10 therefore plays the role of a series of conventional resonators coupled together, or of resonant irises also coupled together by transmission lines, of the prior art.
  • FIG. 6 represents the response curves of two filters, produced according to the invention, the curve CI corresponding to a filter produced with a single resonant window and the curve C 2 corresponding to a filter having two windows in the same cross section of the guide. It can be seen that the width of the passband is greater in the case of the curve C2.

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
EP81401153A 1980-07-22 1981-07-21 Filtre passe-bande hyperfréquence réalisé en guide d'ondes Withdrawn EP0045242A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8016130A FR2487587A1 (fr) 1980-07-22 1980-07-22 Filtre passe-bande hyperfrequence realise en guide d'ondes
FR8016130 1980-07-22

Publications (1)

Publication Number Publication Date
EP0045242A1 true EP0045242A1 (fr) 1982-02-03

Family

ID=9244398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401153A Withdrawn EP0045242A1 (fr) 1980-07-22 1981-07-21 Filtre passe-bande hyperfréquence réalisé en guide d'ondes

Country Status (2)

Country Link
EP (1) EP0045242A1 (enrdf_load_stackoverflow)
FR (1) FR2487587A1 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4680561A (en) * 1984-05-30 1987-07-14 Nec Corporation Microwave waveguide filter having a metal plate which includes a resonant aperture therein
EP0260633A1 (fr) * 1986-09-18 1988-03-23 Alcatel Telspace Filtre composite à large bande type plan E
EP0320268A1 (en) * 1987-12-10 1989-06-14 Nec Corporation Waveguide band-pass filter
US6104262A (en) * 1998-10-06 2000-08-15 Hughes Electronics Corporation Ridged thick walled capacitive slot
ITMI20101848A1 (it) * 2010-10-08 2012-04-09 Tvc S P A Diplexer d'antenna a struttura miniaturizzata

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB608254A (en) * 1944-11-14 1948-09-13 Csf Improvements relating to guides for radio-electric waves associated with elements for regulating the propagation of said waves
GB773527A (en) * 1953-10-09 1957-04-24 British Thomson Houston Co Ltd Improvements in and relating to waveguides
US3196339A (en) * 1960-06-23 1965-07-20 Microwave Ass Microwave harmonic generator and filter element therefor
FR2349968A1 (fr) * 1976-04-27 1977-11-25 Thomson Csf Guide d'ondes a acces lateral et multiplexeur-demultiplexeur muni d'un tel guide
EP0029276A1 (en) * 1979-11-15 1981-05-27 Staat der Nederlanden (Staatsbedrijf der Posterijen, Telegrafie en Telefonie) Microwave filter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB608254A (en) * 1944-11-14 1948-09-13 Csf Improvements relating to guides for radio-electric waves associated with elements for regulating the propagation of said waves
GB773527A (en) * 1953-10-09 1957-04-24 British Thomson Houston Co Ltd Improvements in and relating to waveguides
US3196339A (en) * 1960-06-23 1965-07-20 Microwave Ass Microwave harmonic generator and filter element therefor
FR2349968A1 (fr) * 1976-04-27 1977-11-25 Thomson Csf Guide d'ondes a acces lateral et multiplexeur-demultiplexeur muni d'un tel guide
EP0029276A1 (en) * 1979-11-15 1981-05-27 Staat der Nederlanden (Staatsbedrijf der Posterijen, Telegrafie en Telefonie) Microwave filter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4680561A (en) * 1984-05-30 1987-07-14 Nec Corporation Microwave waveguide filter having a metal plate which includes a resonant aperture therein
EP0260633A1 (fr) * 1986-09-18 1988-03-23 Alcatel Telspace Filtre composite à large bande type plan E
FR2604305A1 (fr) * 1986-09-18 1988-03-25 Alcatel Thomson Faisceaux Filtre composite a large bande de type plan e
US4800349A (en) * 1986-09-18 1989-01-24 Alcatel Thomson Faisceaux E-plane type wide band composite filter
EP0320268A1 (en) * 1987-12-10 1989-06-14 Nec Corporation Waveguide band-pass filter
US6104262A (en) * 1998-10-06 2000-08-15 Hughes Electronics Corporation Ridged thick walled capacitive slot
ITMI20101848A1 (it) * 2010-10-08 2012-04-09 Tvc S P A Diplexer d'antenna a struttura miniaturizzata

Also Published As

Publication number Publication date
FR2487587A1 (fr) 1982-01-29
FR2487587B1 (enrdf_load_stackoverflow) 1984-11-30

Similar Documents

Publication Publication Date Title
EP0047203B1 (fr) Filtre hyperfréquence à résonateur diélectrique, accordable dans une grande largeur de bande
EP0014115B1 (fr) Oscillateur accordable hyperfréquence à ondes magnétostatiques
EP0285503B1 (fr) Filtre comportant des éléments à constantes réparties associant deux types de couplage
FR2578104A1 (fr) Filtre passe-bande pour hyperfrequences
FR2693036A1 (fr) Filtre passe-bande à lignes à couplage parallèle.
EP0108003B1 (fr) Résonateurs bi-rubans et filtres réalisés à partir de ces résonateurs (11111)
EP0260633B1 (fr) Filtre composite à large bande type plan E
FR2542929A1 (fr) Circuit resonant pour l'extraction d'oscillations a frequence d'horloge
EP0045242A1 (fr) Filtre passe-bande hyperfréquence réalisé en guide d'ondes
EP0467818A1 (fr) Elément de transition entre guides d'ondes électromagnétiques, notamment entre un guide d'ondes circulaire et un guide d'ondes coaxial
EP0075498B1 (fr) Filtre à cavités, présentant un couplage entre cavités non adjacentes
CA1074878A (fr) Transition hyperfrequence
EP0274950B1 (fr) Dispositif de couplage à large bande entre la ligne à retard d'un tube à onde progressive et le circuit externe de transmission de l'énergie du tube, et tube à onde progressive comportant un tel dispositif
EP0064458A1 (fr) Filtre passe-bande en guide rectangulaire, présentant une grande sélectivité en fréquence
EP0041877B1 (fr) Coupleur hyperfréquence à guide d'onde
EP0128798B1 (fr) Dispositif sélectif accordable à ondes magnétostatiques de volume
CA2031076A1 (fr) Filtre eliminateur de bande pour guide d'ondes hyperfrequences
EP0520919B1 (fr) Dispositif de filtrage d'ondes électromagnétiques circulant dans un guide d'ondes à symétrie de révolution, à tronçons de guides d'ondes de filtrage rectangulaires insérés
FR2626716A1 (fr) Filtre a resonateurs plans
EP0762529B1 (fr) Polariseur à iris pour source primaire d'antenne
FR2633118A1 (fr) Filtre passe-bande a resonateurs dielectriques
EP1067617B1 (fr) Filtre passe-bande
EP0921587B1 (fr) Filtre hyperfréquence à flanc superieur raide
BE515929A (enrdf_load_stackoverflow)
FR2752339A1 (fr) Diviseur de frequence

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): DE GB IT NL SE

17P Request for examination filed

Effective date: 19820619

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840613

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SILLARD, GILLES