Patent ID: 6393254
Filing Date: 2002-05-21
Classification: H04K,H04W

Abstract:
A mobile communications terminal disabler comprising:a. a receiving antenna wherein carrier signals are received, at least one carrier signal being characterized by: (1) a frequency, and (2) a channel synchronization signal; b. a control module including: (1) a carrier power level detector coupled to the receiving antenna, wherein the power level of each carrier signal is determined, and (2) a carrier signal detector coupled to the receiving antenna, wherein the carrier power level detector and carrier signal detector are periodically operative during carrier measurement periods, the carrier measurement periods being spaced by jamming periods; c. an emitter comprising: (1) a frequency generator wherein generator signals are generated, each generator signal being generated in accordance with the frequency and channel synchronization signal of the carrier signal; (2) a noise generator; (3) a modulator wherein the generator signal is modulated with the noise output of the noise generator; (4) a power amplifier wherein the modulated generator signal is amplified in accordance with (a) the power level of its underlying carrier signal, and (b) the jamming periods, with the amplification being active during the jamming periods and inactive during the carrier measurement periods; â€ƒthereby producing an interference signal; (5) an emitting antenna from which the interference signal is emitted.