Method and apparatus for generating a RF signal

摘要

The invention is concerned with a method of generating a high-power modulated radio-frequency signal from a low- or medium frequency information signal by pulse-forming of the information signal by means of a quantifier to form a digital signal having discrete signal values, generating one or more carrier waves of radio frequency, amplification by means of an amplifier comprising switches into a switched radio-frequency signal carrying the information, the switching events being controlled by the information content of the digital signal, and achieving the desired signal by means of a filter. The method is characterized in the carrier waves are generated by means of alternating radio-frequency voltages and that the amplification is performed by connecting the switches to the alternating carrier voltages, thus causing mixing of the digital signals with a corresponding carrier signal, in accordance with a given information content of the digital signal. The invention is also concerned with an apparatus to carry said method. <IMAGE>