App note: Detecting and locating RF bugs
This design idea showcases a circuit that detects RF “bugs,” such as hidden wireless cameras, eavesdropping microphones, and other spying devices that emit RF frequencies in the 100MHz to 3000MHz range. A modification to this circuit not only detects RF bugs, but also locates their hidden positions.
The circuit is based around the MAX2015 RF detector which outputs a voltage proportional to the strength of a received RF signal in the 100 MHz to 3 GHz range. This voltage can be detected with a comparator that activates a buzzer at a predefined signal strength.
If the comparator is replaced with a op-amp the circuit could be used to locate RF transmitters by increasing the buzzer volume as one comes closer the source.This entry was posted in app notes and tagged Detecting, Locating, maxim, RF bug.