Alcatel

Luc Cavelier

Philippe Voisin

Jean-Marc Bassaler

Thierry Judasz

Muriel Aveline

The present invention relates to an amplifier system for satellites, in particular for radio-frequency amplifier systems incorporating travelling wave tube amplifiers and used in space repeaters. The amplifier system () includes two amplifier modules (A, A) each having an input and an output, a signal divider (D) having an input, a first output, and a second output, a signal combiner (C) having a first input, a second input and an output. The first output of the divider (D) is connected to the input of the first amplifier module (A) via a connection length Le. The second output of the divider (D) is connected to the input of the second amplifier module (A) via a connection length Le. The output of the first amplifier module (A) is connected to the first input of the combiner (C) via a connection length Ls. The output of the second amplifier module (A) is connected to the second input of the combiner (C) via a connection length Ls. The connection length satisfies the equation Le+Ls=Le+Lsand the connection length Lsis different from the connection length Ls.

Amplifier system for satellites

A multi-beam antenna system including a parabolic reflector with a parallelogram perimeter, which is illuminated by a plurality of feed elements. The parabolic reflector reflects a first beam corresponding to one frequency that illuminates a first parallelogram spot, and a second beam corresponding to the same frequency illuminates a second parallelogram spot. The first and second spots are parallelepiped and are arranged such that spots of the same frequency are generally not adjacent to each other.

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Cannes, France

Luc Cavelier