Method and device for generating a high frequency multi-carrier signal

A circuit (SA) for generating a high-frequency multi-carrier signal (TS) from at least two carrier signals (S 1 , S 2 ) having respective carrier frequencies (f 1 , f 2 ). The circuit includes two signal generators (G 1 , G 2 ) to generate the carrier signals, two high-frequency amplifiers (V 1 , V 2 ), connected to outputs of the two signal generators respectively, to generate two amplified carrier signals (VS 1 , VS 2 ) and a high-frequency combiner (HF) connected to the outputs of the amplifiers, to combine the two amplified carrier signals and generate the multi-carrier signal. The two carrier signals have a selected frequency spacing (dF) between them. The ratio of the frequency spacing of the two carrier signals to a frequency of each of the two carrier signals is less than 1:100. Electrical characteristics of the two amplifiers and the combiner are adjusted such that intermodulation frequency components of the two carrier signals have signal strengths below a certain threshold relative to signal strengths of the two carrier signals.