Development of a cyber-secured zone with directive antennas and noise generation

A wireless cyber secure zone has been created by controlling RF propagation using directive antennas and noise generation to establish a functional boundary for a wireless network. Directive microstrip patch antennas were constructed in the 2.4-GHz ISM band, and a commercial router was used to generate a wireless network on a specified channel. The FM transmitters for noise generation were set to the same channel in the 2.4-GHz ISM band, and the directive microstrip patch antennas were arranged facing outward creating an inner cyber secure zone for the wireless network. Outside the cyber secure zone, the wireless network was undetectable.