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REACTIVE JAMMING




JAMMING ACTIVATED ONLY WHEN A CALL IS INITIATED

Reactive Jamming Functionality Now Available in one unit. Reactive Jamming eliminates both health and safety concerns related to continuous exposure to RF jamming signals and the effect RF jamming signals may have outside of the designated target areas

CellAntenna's R&D engineers have designed the ultimate jamming system by integrating 3 core technologies into an advanced jamming system that is activated ONLY when the jamming system detects a cell phone in the target area attempting to communicate with the cellular system for call establishment


Core Technologies:

- Detection - Passive

- Jamming - Active

- Distributed Antennas


Each application for a reactive jamming system can be customized for coverage area based on the distributed antenna system design and the output power of the jamming control unit(s). The system detection unit is totally passive as it does not transmit RF signals.



Applications:

- Libraries

- Court Rooms

- Banks

- Offices

- Theaters

- Universities



How CellAntenna's Reactive Jammer Works

1) Cell phone systems are full duplex systems and use separate RF frequencies to transmit: and receive.

- From the cell phone to the cellular tower/base station (uplink channels/frequencies)
- To the cell phone from the cellular tower/base station (downlink channels /frequencies)

2) The cell phone reactive jamming system is connected to a distributed antenna system.

3) The reactive jamming system is designed to continuously monitor all of the cellular carrier's uplink frequencies (handset to tower).

4) In an idle state, the cell phone reduces power to conserve the battery life.

5) When a call/text is initiated by the handset, the power level is always increased on an uplink frequency.

6) The cellular detection module in the reactive jamming system senses this increase in the power level and automatically activates the jamming module of the reactive jamming system.

7) The jamming module is designed to only transmit the jamming signals on the cellular carrier's downlink frequencies.

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