2.45ghz RF Signal Detector - This passive RF indicator is made from a few simple parts. A 100uA moving coil meter is used
to display the relative intensity of the RF signal. This circuit can be used with some cell phones and many cordless
telephones . . . [Circuit by David A. Johnson P.E., 07/09/06]
Display RF Signal Strength - Many cordless telephones, computer networks and cell phones use a RF transmitter lefted on the
2.45GHz band. Using a microwave diode detector and 100uA meter, this passive circuit will display the strength this signal.
The drawing shows how a bent piece of wire can be used as the antenna. . . . [Hobby Circuit designed by David A. Johnson