Multiple Continuous-Wave (CW) Radio Frequency (RF) signals are used in many telecommunication applications, such as frequency aggregation in LTE-Advanced (LTE-A), intermodulation distortion measurements and …, in order to use more efficiently the frequency bands that are available. In this work a new method for generating three frequencies and more, with no a-priori condition on the frequency allocation, is elaborated in theory and practical results are presented, as well.