Global Patent Index - EP 0935821 B1

EP 0935821 B1 2003-06-18 - IMPROVED WAVEGUIDE FOR USE IN DUAL POLARISATION PROBE SYSTEM

Title (en)

IMPROVED WAVEGUIDE FOR USE IN DUAL POLARISATION PROBE SYSTEM

Title (de)

HOHLLEITER FÜR SONDENSYSTEM MIT ZWEI POLARISATIONEN

Title (fr)

GUIDE D'ONDES AMELIORE POUR SYSTEME DE SONDE DE POLARISATION DOUBLE

Publication

EP 0935821 B1 (EN)

Application

EP 97940233 A

Priority

  • GB 9702428 W
  • GB 9618744 A

Abstract (en)

[origin: WO9810479A1] A waveguide for use with a dual polarisation waveguide probe system is described which provides an improved frequency response across a desired frequency range (10.7 to 12.75 GHz) and particularly at the band edges. This is achieved by providing a waveguide (14) with a rotator which incorporates a reflecting plate (30) in combination with a differential phase shift portion (36, 38) in the form of a waveguide of slightly asymmetrical cross section so that orthogonal signals which travel through this portion have a different cut-off wavelength. This results in a rotator which achieves 180 DEG of phase shift between two orthogonal components across the frequency range of signals received by the waveguide. The reflecting plate and the differential phase shift portion have inverse frequency characteristics so that the combined phase shift charteristic of the rotator has a flatter frequency characteristic.

IPC 1-7 (main, further and additional classification)

H01P 1/161

IPC 8 full level (invention and additional information)

H01P 1/161 (2006.01)

CPC (invention and additional information)

H01P 1/161 (2013.01)

Designated contracting state (EPC)

DE ES FR GB IT

EPO simple patent family

WO 9810479 A1 19980312; AU 4214097 A 19980326; CN 1232577 A 19991020; DE 69722950 D1 20030724; DE 69722950 T2 20040513; DE 69722950 T8 20040916; EP 0935821 A1 19990818; EP 0935821 B1 20030618; GB 9618744 D0 19961023

INPADOC legal status


2009-11-30 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2009-05-27 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

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2004-07-02 [EN] FR: TRANSLATION NOT FILED

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2003-09-29 [PG25 ES] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2003-07-24 [REF] CORRESPONDS TO:

- Document: DE 69722950 P 20030724

2003-06-18 [AK] DESIGNATED CONTRACTING STATES:

- Designated State(s): DE ES FR GB IT

2003-06-18 [REG GB FG4D] EUROPEAN PATENT GRANTED

2003-06-18 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

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2003-06-18 [PG25 IT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Effective date: 20030618

2001-04-18 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: CHANNEL MASTER LIMITED

1999-12-22 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19991109

1999-10-20 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: BAIRD, ANDREW, PATRICK

1999-08-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990608

1999-08-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE ES FR GB IT