EP 0935821 B1 20030618 - 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
Application
Priority
- GB 9702428 W 19970909
- GB 9618744 A 19960909
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
IPC 8 full level
H01P 1/161 (2006.01)
CPC (source: EP)
H01P 1/161 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
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
DOCDB simple family (application)
GB 9702428 W 19970909; AU 4214097 A 19970909; CN 97198506 A 19970909; DE 69722950 T 19970909; EP 97940233 A 19970909; GB 9618744 A 19960909