Abstract: 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 (1) includes two amplifier modules (A1, A2) 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 (A1) via a connection length Le1. The second output of the divider (D) is connected to the input of the second amplifier module (A2) via a connection length Le2. The output of the first amplifier module (A1) is connected to the first input of the combiner (C) via a connection length Ls1. The output of the second amplifier module (A2) is connected to the second input of the combiner (C) via a connection length Ls2.

Abstract: 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 (1) includes two amplifier modules (A1, A2) 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 (A1) via a connection length Le1. The second output of the divider (D) is connected to the input of the second amplifier module (A2) via a connection length Le2. The output of the first amplifier module (A1) is connected to the first input of the combiner (C) via a connection length Ls1. The output of the second amplifier module (A2) is connected to the second input of the combiner (C) via a connection length Ls2.

Abstract: 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.

Abstract: A multi-beam antenna system including a parabolic reflector with a parallelogram perimeter, which is illuminated by a plurality of feed elements; so that the parabolic reflector reflects a first beam corresponding to one frequency that illuminates a first parallelogram spot, a second beam corresponding to the same frequency that illuminates a second parallelogram spot, such that the first and second spots are parallelepiped arranged one un-adjacent another of the same frequency are generally un-adjacent.