EP 0014692 B1 19831130 - MODE COUPLER IN AN AUTOMATIC ANGLE TRACKING SYSTEM
Title (en)
MODE COUPLER IN AN AUTOMATIC ANGLE TRACKING SYSTEM
Publication
Application
Priority
SE 7901055 A 19790207
Abstract (en)
[origin: EP0014692A2] 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