EP 0014692 A2 19800820 - Mode coupler in an automatic angle tracking system.
Title (en)
Mode coupler in an automatic angle tracking system.
Title (de)
Wellentypkoppler für ein automatisches Winkelverfolgungssystem.
Title (fr)
Coupleur de mode dans un système de poursuite automatique en angle.
Publication
Application
Priority
SE 7901055 A 19790207
Abstract (en)
the invention relates to a mode coupler which, for example is included in an angle tracking system of a satellite to establish a telecommunication between the transmitting and the receiving ground stations. The mode coupler is realized through a circular main wave guide (1) which also can include the feeding horn of the satellite antenna in which a basic mode, for example the TE11-mode of the incoming circular polarized wave guide field appears and which procures two communication channels (f1-f2 and f3-f4 respectively), as well as a beacon frequency (fb). To the main wave guide four rectangular wave guide arms (2a-2d) are connected via the associated apertures (3a-3d). The main wave guide is dimensioned as a mode filter for filtering away the non-desired higher modes TE21 and TM01 and the wave guide arms are dimensioned as a frequency filter for filtering away the frequency bands of the communication channels. From the higher modes TE21 and TM01, the difference- and the sum signals are created in known way to provide a measure of the angle error of the satellite antenna.
IPC 1-7
IPC 8 full level
H01P 1/16 (2006.01); H01Q 13/02 (2006.01); H01Q 25/04 (2006.01)
CPC (source: EP)
H01P 1/16 (2013.01); H01Q 13/025 (2013.01); H01Q 25/04 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0014692 A2 19800820; EP 0014692 A3 19800917; EP 0014692 B1 19831130; DE 3065740 D1 19840105; SE 419906 B 19810831; SE 7901055 L 19800808
DOCDB simple family (application)
EP 80850014 A 19800206; DE 3065740 T 19800206; SE 7901055 A 19790207