| 摘要 |
The invention concerns an active radiofrequency device, with minimal spectral occupancy, for eliminating electromagnetic and sound disturbances caused by GSM-type mobile telephones or the like. The invention concerns a device for eliminating interference caused by mobile telephones in conformity with the GSM standard and the like, and for inhibiting reception and transmission of calls on said telephones, by scrambling the beacon voice transmitted by each operator. It consists of a frequency synthesiser (1), a modulator (2), amplifiers (3), and radiating devices (4). Said device is particularly designed for entertainment, conference and assembly halls.
|
