EP0014692A2 - Coupleur de mode dans un système de poursuite automatique en angle - Google Patents

Coupleur de mode dans un système de poursuite automatique en angle Download PDF

Info

Publication number
EP0014692A2
EP0014692A2 EP80850014A EP80850014A EP0014692A2 EP 0014692 A2 EP0014692 A2 EP 0014692A2 EP 80850014 A EP80850014 A EP 80850014A EP 80850014 A EP80850014 A EP 80850014A EP 0014692 A2 EP0014692 A2 EP 0014692A2
Authority
EP
European Patent Office
Prior art keywords
wave guide
mode
modes
signals
guide arms
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.)
Granted
Application number
EP80850014A
Other languages
German (de)
English (en)
Other versions
EP0014692A3 (en
EP0014692B1 (fr
Inventor
Karl Erik Anders Molker
Barry Kenneth Watson
Per Bertil Ingvarsson
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20337224&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0014692(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of EP0014692A2 publication Critical patent/EP0014692A2/fr
Publication of EP0014692A3 publication Critical patent/EP0014692A3/en
Application granted granted Critical
Publication of EP0014692B1 publication Critical patent/EP0014692B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/04—Multimode antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02—Waveguide horns
    • H01Q13/025—Multimode horn antennas; Horns using higher mode of propagation

Definitions

  • the present invention relates to a mode coupler according to the preamble of the claim 1, included in an automatic angle tracking system in microwave antennas, operating with circular polarization.
  • the tracking system can be included in a satellite for telecommunication between one or several transmitting ground stations and a number of receiving ground stations, the tracking system keeping the antenna of the satellite directed towards a certain area of the ground by means of a so called beacon signal from one of the transmitting ground stations.
  • mode coupLer is in the present application meant an arrangement which can separate the basic mode from the various higher order modes and deLiver output signals proportional to the strength of the various higher modes.
  • a known tracking system with the property to detect a certain deviation (the pointing error) between the reflector axis of a ground station and the direction of a target by separating the higher order modes from the basic mode is described in BeLL System TechnicaL JournaL, JuLy 1963, pages 1283-1307.
  • a circular waveguide is connected to the feeding horn, only the basic mode being formed in the wave guide if the pointing error is zero, i e if the antenna is perfectly directed towards the target. Otherwise higher modes arise in the wave guide, among which one, namely the TM01 is empLoyed to form error signals together with the basic mode and which are allowed to control the regulating circuits in the antenna system of the ground station so that the pointing error will become zero.
  • a sum signal is obtained from the basic mode and a difference signal from the higher mode TM 01 .
  • the error signaLs for example in the elevation and the azimuth directions are in the receiver of the tracking system indicated by means of the difference and the sum signals, the amplitude and the phase position of the difference signal reLativeLy the sum signal determining the magnitude of the angle deviation of the target from the antenna axis and the direction of the deviation, respectively.
  • a very good phase equality between the signal paths is required for the sum and the difference signals, particuLarLy at off-boresight tracking.
  • the system is sensible to changes in the poLarization of the beacon signal.
  • a first and a second higher mode, TM 01 and TE 21 , respectively and the basic mode TE 11 are employed to create the error signals.
  • This known system contains a mode coupler, consisting of three wave guide sections, which together form the circuLar wave guide connected to the feeding horn of the system. Two of these wave guide sections are each provided with a pair of rectangular wave guides, which are connected to the main wave guide with a certain aperture to couple out the required higher modes to form difference signals. Together with the sum signal, extracted in another place in the system, the error signaLs are formed.
  • error signals in two planes are to be created which are depending only on the difference angles of the target in these planes but not on variations in the strength of the beacon signal (the fading) and the polarization (the depoLarization) within certain Limits.
  • Such variations arise., for example, through the influence of the atmosphere on the wave propagation.
  • the system should also be as unsensible as possible to changes in the characteristics of the components which inevitably arise, for example in time or at varying temperature. It is of importance partly to employ appropriate wave guide modes and partly to couple out these in appropriate manner to create the sum- and the difference signals and partly to Let the signals be conducted the same or possibly equal paths from the antenna to the receiver. Otherwise, varying sensitivity at reception or eventual pointing error is obtained. ParticuLarLy at off-boresight tracking, also pointing errors are obtained as a consequence of the sensitivity variation.
  • two higher modes TM 01 and TE 21 and the basic modes TE 11V and TE 11H in a smooth wave guide, or E 02 and HE 21 and NE 11V and NE 11H in a corrugated wave guide are employed and aLL the empLoyed modes are coupled out in the same section of the circular main wave guide, whereupon from these modes.
  • two sum and two difference signals are formed and guided through a common receiver channel, whereby the difficulties in keeping the signals equal in phase are avoided.
  • the error signals are produced in the two planes by employing the sum and difference signals belonging to the respective planes.
  • the object of the present invention is thus to provide a mode coupler, which conducts two higher modes and two basic modes in order to create two difference signals (for example denominated ⁇ x and ⁇ y ) and two sum signals (for example Ex and ⁇ y ), the obtained modes and the sum-difference-signals travelling an equal path through the tracking system and, in addition, in pairs ( ⁇ x, ⁇ x and Ey , ⁇ y) showing the same influence from the depolarization of the beacon signal.
  • the invention is then characterized as appears from the characterizing part of claim 1.
  • the tracking system in which the proposed mode coupler is included, represents a part of the telecommunication equipment of a sateLLite, which receives, treats and transmits the signals received from the ground station to a number of other ground stations.
  • the transmission is carried out by RF-signaLs and for that purpose two frequency bands are selected, which are schematicLy shown in Fig 1.
  • the band f 1 -f 2 (for example 400 MHz) with the center frequency fT forms the transmitter channel for a certain ground station and the band f 3 -f 4 with the center frequency f R forms the receiver channel for the station.
  • the transmission of the transmitter and the receiver channels is carried out within the GHz-band and by means of a reflector antenna, with a horn antenna as feeder.
  • a beacon frequency f b for example 12.498 GHz.
  • the two bands f 1 -f 2 and f3-f 4 can either be situated below the beacon frequency f b , as shown in Fig 1, or above this frequency. In certain cases only one band is used (an antenna for transmitting from or reception to a satellite only).
  • Fig 2 it is shown more detailed the two higher modes, which arise in the main wave guide of the tracking system, the guide being connected to the antenna.
  • the modes are employed to indicate an eventual deviation between the directions of the reference signal of the antenna and the target direction.
  • the two basic modes TE 11V and TE 11H are shown. These are employed for transmitting the telecommunication signals and for normalization of the difference signals.
  • the principle of the tracking is that the two modes TE 21 and TM 01 in a smooth-waLLed wave guide (or corresponding modes HE21 and E 02 in a corrugated wave guide), according to Fig 2, which have the same amplitude and phase in the y-direction, and opposite phase but the same amplitude in the x-direction are added to form the error signals ⁇ x and ⁇ y .
  • the principle is generally shown in the figures 3a-3f.
  • the figures 3a-3c show the addition of the two modes, a signal representing the error in the y-direction (the eLevationaL error) being obtained, while the figures 3d-3f show subtraction of the two modes, a signal representing the error in the x-direction (the azimutal error) being obtained.
  • the structure of the mode coupler in the tracking system appears from Fig 4. It consists of a circular wave guide 1, which is connected to the feeding horn, not shown, in the tracking system, and to a polarization unit, which is not shown in the description.
  • the main wave guide 1 can either constitute an integrated part of the feeding horn or consist of a separate part connected to the feeding horn.
  • the wave guide walls can either be performed with smoothed or corrugated surfaces.
  • Four rectangular wave guide arms 2a-2d are provided to the circular main wave guide 1, which each are coupled to the wave guide 1 by the apertures 3a-3d.
  • the apertures 3a-3d are arranged reLativeLy displaced 90 0 around the outer circumference of the wave guide 1.
  • the front part 11 of the wave guide 1 is shown in a cut feature in order to make the positions of the apertures clear.
  • Characteristic for the proposed mode coupler is that the rectangular wave guide arms 2a-2d are connected to the main wave guide 1 in the same section.
  • the front part 11 constitutes the feeding horn or is connected to the horn in known manner, this part of the circularly polarized wave guide field in the TE 11 -mode transmitting the two communication channels f 1 -f 2 , f 3 -f 4 and the beacon frequency signal f b according to Fig 1.
  • the two higher modes TE21 and TM 01 arising in the main wave guide at a certain angle deviation of the incoming signals to the tracking system are employed to form the error signals ⁇ x and ⁇ y .
  • the coupling of these higher modes is carried out by exciting the TE 10 -mode in the wave guide arms 2a-2d, from the field in the main wave guide 1 by coupLing openings in the form of the apertures 3a-3d.
  • the apertures 3a-3d are preferably of rectangular form and their dimension is chosen in such a way that a sufficient coupling of the TE 10 -mode is obtained from the wave guide 1 to the rectangular wave guide arms 2a-2d.
  • the inner sectional area of these will, however, be dimensioned so that the TE 10 -mode propagates in the wave guides 2a-2d at the frequency f b in known manner.
  • the amplitude and the phase of the TE 10 -mode occurring in the rectangular wave guides 2a-2d is then determined by the amplitude and the phase position of the higher modes TE 21 , TM 01 and the basic mode TE 11 , occurring in the main wave guide 1, aLL the modes giving a certain contribution to the field in the rectangular wave guides 2a-2d.
  • Fig 5 shows more in detaiL the circular wave guide 1 of the mode coupler in which, for the sake of clarity, the rectangular wave guide arms 2a-2d are omitted.
  • the rear part 12 of the wave guide 1 shows a tapered part 13, containing two sections I and II.
  • the section I is situated on a distance d 1 from the section, defined by the wave guides 2a-2d, the distance d 1 being chosen for a certain value of the radius R, so that a standing wave for the TE 21 -mode is created in the wave guide part, Limited by the distance d 1 and so that the maximum value of the mode coincides at the apertures 3a-3d or close to these.
  • the section II is situated on a distance d 2 from the mentioned sections, the distance d 2 being chosen so that a standing wave for the TM01 is created in the wave guide part Limited by the distance d 2 which assumes a maximum value at the apertures 3a-3d or close to these.
  • the distances d 1 and d 2 then form an even (but not necessarily the same) number of quarter-waveLengths for the modes TE 21 and TM 01 , respectively.
  • the taped part.13.of the circular wave guide forms a mode filter for filtering away the non-desired modes TE 21 and TM 01 , which are reflected back to the apertures 3a-3d at the short circuit planes formed by the sections I and II and, according to above there assume a maximum value.
  • the mode filter 13 does not influence the TE 11 -mode, which transmits the telecommunication signals within the frequency bands f 1 -f 2 , f 3 -f 4 , which thus appear across the outlet of the mode coupler.
  • the tapered part 13 has a non-Linear contour, which can be determined by experimental measurements.
  • the coupling out from the wave guide field in the circular main wave guide 1 is carried out by means of the four apertures 3a-3d and the TE 10 -mode is excited in the four wave guide arms 2a-2d.
  • a wave guide arm is shown more in detail. It consists of a broader part, connected to the main wave guide, and has the sectional dimensions indicated by a and b, respectively in Fig 6.
  • the dimension b 1 is chosen in such a way that aLL frequencies of the field in the wave guide 2a from f 1 up to f b can be propagated in the wave guide as a TE 10 -mode.
  • the wave guide 2a has a tapered part which is principally Limited by the sections III and IV.
  • the dimension b 2 of the wave guide is such that the center frequency f T of the band f 1 -f 2 is reflected, i e b 2 is such that the section III forms a short-circuit plane for the TE 10 -mode at the frequency f T .
  • the distance d 4 for the section IV should be chosen in such a way that the dimension b 3 is such that the center frequency f R of the band f 3 -f 4 is refLected.
  • the wave guide sections III and IV thus define a frequency filter for filtering away the telecommumcation signals, the distances d 3 and d 4 forming a number (not necessariLy the same) of half wave Lengths for the TE 10 -mode at the center frequencies f T and f R , i e the sections III and IV form the short circuit planes, transformed to the apertures 3a-3d, for the frequencies f R and f T respectively.
  • the wave guide 2a and the remaining wave guides 2b-2d only the signals corresponding to the TE 11 -mode which has the frequency f b are obtained and, furthermore, the signals corresponding to the two modes TE 21 and TM 01 at the frequency f b in the main wave guide 1.
  • a wave guide network is schematicLy shown, consisting of so caLLed magic Ts, which is connected to the four rectangular wave guide arms 2a-2d for recovering the error signals ⁇ x, ⁇ y and the reference signals Ex and ⁇ y.
  • Each connection point m1-m4 represents a magic T with two inputs 1 and 2 and a sum- and a difference output s and ⁇ , respectively.
  • the signals, appearing on the outlets of the four wave guide arms 2a-2d are shown, which are derived from the four modes TE 21 , TM 01 and TE 11H , TE 11V , appearing in the main wave guide 1, cf Fig 2.
  • Fig 7 shows that the signals ⁇ x and ⁇ y are separated in three different stages. In the first stage the signals, derived from the TE21-and TM 01 -modes in the connection points m1 and m2, are separated. In the second stage, a separation of the two modes TE 21 and TM 01 is carried out in the connection point m3 and in the third stage the desired error signals ⁇ x and ⁇ y is formed by vectorial addition in the connection points m4 as shown in Fig 3.
  • phase-and amplitude adjustments can be introduced (trimming and temperature compensation). In some cases this is not necessary, the connection points m3 and m4 being omitted.
  • correct phase-and amplitude properties be obtained by accurate choice of the distances d 1 and d 2 in Fig 5, of the difference in phase propagation between the TE 21 and TM 01 -modes when propagating from the orifice of the horn, and of the dimensions of the apertures 3a-3d in Fig 5.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radar Systems Or Details Thereof (AREA)
EP19800850014 1979-02-07 1980-02-06 Coupleur de mode dans un système de poursuite automatique en angle Expired EP0014692B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7901055A SE419906B (sv) 1979-02-07 1979-02-07 Modkopplare i ett automatiskt vinkelfoljesystem
SE7901055 1979-02-07

Publications (3)

Publication Number Publication Date
EP0014692A2 true EP0014692A2 (fr) 1980-08-20
EP0014692A3 EP0014692A3 (en) 1980-09-17
EP0014692B1 EP0014692B1 (fr) 1983-11-30

Family

ID=20337224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800850014 Expired EP0014692B1 (fr) 1979-02-07 1980-02-06 Coupleur de mode dans un système de poursuite automatique en angle

Country Status (3)

Country Link
EP (1) EP0014692B1 (fr)
DE (1) DE3065740D1 (fr)
SE (1) SE419906B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498336A1 (fr) * 1981-01-19 1982-07-23 Trw Inc Dispositif de transmission d'ondes electromagnetiques en polarisation lineaire
GB2163909A (en) * 1984-08-29 1986-03-05 Era Patents Ltd Beacon tracking system
EP1369955A2 (fr) * 2002-05-30 2003-12-10 Harris Corporation Antenne cornet multibande
EP1672739A1 (fr) * 2004-12-14 2006-06-21 MDA Space Inc. Cornet à mode multiple à haute performance pour communication et poursuite
WO2012172565A1 (fr) 2011-06-14 2012-12-20 Indian Space Research Organisation Coupleur hyperfréquence basé sur une jonction à tourniquet de guide d'onde à large bande et système d'alimentation à poursuite monopulse
CN103094718A (zh) * 2012-12-06 2013-05-08 北京遥测技术研究所 Ka频段小型化宽频带多模自跟踪馈源网络
US20130207859A1 (en) * 2010-04-30 2013-08-15 Centre National De La Recherche Scientifique Compact radiating element having resonant cavities
WO2013121221A3 (fr) * 2012-02-17 2013-10-24 Pro Brand International (Europe) Limited Appareil de réception et/ou d'émission de signal de données multibande
CN116581550A (zh) * 2023-07-11 2023-08-11 银河航天(西安)科技有限公司 一种馈源组件及馈源系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566309A (en) * 1969-02-24 1971-02-23 Hughes Aircraft Co Dual frequency band,polarization diverse tracking feed system for a horn antenna
US3936838A (en) * 1974-05-16 1976-02-03 Rca Corporation Multimode coupling system including a funnel-shaped multimode coupler
FR2302601A1 (fr) * 1975-02-28 1976-09-24 Thomson Csf Dispositif d'extr
DE2632606A1 (de) * 1976-04-20 1977-10-27 Marconi Co Ltd Wellentypkoppler-anordnung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566309A (en) * 1969-02-24 1971-02-23 Hughes Aircraft Co Dual frequency band,polarization diverse tracking feed system for a horn antenna
US3936838A (en) * 1974-05-16 1976-02-03 Rca Corporation Multimode coupling system including a funnel-shaped multimode coupler
FR2302601A1 (fr) * 1975-02-28 1976-09-24 Thomson Csf Dispositif d'extr
DE2632606A1 (de) * 1976-04-20 1977-10-27 Marconi Co Ltd Wellentypkoppler-anordnung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
AP-S INTERNATIONAL SYMPOSIUM 1975; IEEE New York US C.C. HAN et al.: "A Split-Mode Horn/Reflector Antenna. A New Concept in Antenna Design", pages 93-96. * The whole ducument * *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498336A1 (fr) * 1981-01-19 1982-07-23 Trw Inc Dispositif de transmission d'ondes electromagnetiques en polarisation lineaire
GB2163909A (en) * 1984-08-29 1986-03-05 Era Patents Ltd Beacon tracking system
EP1369955A2 (fr) * 2002-05-30 2003-12-10 Harris Corporation Antenne cornet multibande
EP1369955A3 (fr) * 2002-05-30 2004-09-01 Harris Corporation Antenne cornet multibande
EP1672739A1 (fr) * 2004-12-14 2006-06-21 MDA Space Inc. Cornet à mode multiple à haute performance pour communication et poursuite
US20130207859A1 (en) * 2010-04-30 2013-08-15 Centre National De La Recherche Scientifique Compact radiating element having resonant cavities
US9843099B2 (en) * 2010-04-30 2017-12-12 Thales Compact radiating element having resonant cavities
WO2012172565A1 (fr) 2011-06-14 2012-12-20 Indian Space Research Organisation Coupleur hyperfréquence basé sur une jonction à tourniquet de guide d'onde à large bande et système d'alimentation à poursuite monopulse
US9735470B2 (en) 2012-02-17 2017-08-15 Pro Brand International (Europe) Limited Multiband data signal receiving and/or transmitting apparatus
WO2013121221A3 (fr) * 2012-02-17 2013-10-24 Pro Brand International (Europe) Limited Appareil de réception et/ou d'émission de signal de données multibande
CN103094718A (zh) * 2012-12-06 2013-05-08 北京遥测技术研究所 Ka频段小型化宽频带多模自跟踪馈源网络
CN103094718B (zh) * 2012-12-06 2015-05-27 北京遥测技术研究所 Ka频段小型化宽频带多模自跟踪馈源网络
CN116581550A (zh) * 2023-07-11 2023-08-11 银河航天(西安)科技有限公司 一种馈源组件及馈源系统
CN116581550B (zh) * 2023-07-11 2023-11-24 银河航天(西安)科技有限公司 一种馈源组件及馈源系统

Also Published As

Publication number Publication date
DE3065740D1 (en) 1984-01-05
EP0014692A3 (en) 1980-09-17
SE419906B (sv) 1981-08-31
EP0014692B1 (fr) 1983-11-30
SE7901055L (sv) 1980-08-08

Similar Documents

Publication Publication Date Title
US4030048A (en) Multimode coupling system including a funnel-shaped multimode coupler
EP0443526B1 (fr) Dispositif coupleur à micro-ondes
US7180459B2 (en) Multiple phase center feedhorn for reflector antenna
EP0142555B1 (fr) Reseau en phase a bande double utilisant un element a large bande avec un diplexeur
CA2202843C (fr) Antenne a liaison d'alimentation
EP1369955B1 (fr) Antenne cornet multibande
US3566309A (en) Dual frequency band,polarization diverse tracking feed system for a horn antenna
KR101813118B1 (ko) 안테나 시스템
US4473828A (en) Microwave transmission device with multimode diversity combined reception
US4420756A (en) Multi-mode tracking antenna feed system
US3274604A (en) Multi-mode simultaneous lobing antenna
US5635944A (en) Multi-band antenna feed with switchably shared I/O port
US6166699A (en) Antenna source for transmitting and receiving microwaves
US4199764A (en) Dual band combiner for horn antenna
CN109326887A (zh) 毫米波圆波导多模三通道跟踪馈源
EP0014692A2 (fr) Coupleur de mode dans un système de poursuite automatique en angle
US3560976A (en) Feed system
US4376937A (en) Antenna for primary and secondary radars
US4630059A (en) Four-port network coupling arrangement for microwave antennas employing monopulse tracking
US2784381A (en) Hybrid ring coupling arrangements
GB2382228A (en) Dual beam monopulse antenna system
US5043684A (en) Compact high power, high directivity, waveguide directional coupler utilizing reactively loaded junction
CA1294004C (fr) Separateur de signaux a diversite angulaire utilisant une conversion de modes
US3380057A (en) Dual band ridged feed horn
US4639731A (en) Monopulse feeder for transmitting and receiving radar signals within two mutually separated frequency bands

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB IT

AK Designated contracting states

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19810119

ITF It: translation for a ep patent filed

Owner name: FUMERO BREVETTI S.N.C.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3065740

Country of ref document: DE

Date of ref document: 19840105

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: SIEMENS AKTIENGESELLSCHAFT, BERLIN UND MUENCHEN

Effective date: 19840830

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

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

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 19870709

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

Ref country code: DE

Payment date: 19900426

Year of fee payment: 11

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19911101

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

Ref country code: FR

Payment date: 19980126

Year of fee payment: 19

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

Ref country code: GB

Payment date: 19980127

Year of fee payment: 19

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990206

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990206

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991029

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST