Abstract: 1. A method of jamming wireless communications having a frequency falling within a predetermined frequency band, by means of a powerful jamming transmission, comprising the steps of separating out from the predetermined frequency band, by an electrical filtering operation, a suspect transmission signal falling therein, producing an interference signal band having a band width sufficient to include all filtered frequencies, separating out, by an electrical filtering operation, a signal having a frequency corresponding to the frequency of the previously filtered suspect signal, from said interference signal band, and utilizing said last filtered signal at the interference frequency in the wireless transmission of a jamming signal, the frequency of which corresponds to the frequency of the suspect transmission signal so detected.