Sensors / Detectors: RF (Radio Frequency) Detectors

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RF Detectors: #'s - B C - O P - R S- Z
Last Updated on: Wednesday, November 29, 2017 05:39 AM

Circuits Designed by Dave Johnson, P.E.:

2.45GHz RF Signal Detector
This passive RF indicator hobby circuit is made from a few simple parts. A bent piece of wire forms a 2.5GHz antenna. A 100uA moving coil meter is used to display the relative intensity of the RF signal. Two microwave rated detector diodes form a simple voltage doubler circuit, which feeds a DC voltage to the meter movement, proportional to the RF field strength. This circuit can be used with some cell phones and many cordless telephones. It can also detect RF leaking from a microwave oven.

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

8 Hints for Making Better RF Counter Measurements 5967-6038e - Aligent Application Note (added 3/06)

AN-1375: Linear-In-dB RF Power Detector in W-CDMA User Equipment - National Semiconductor Application Note (app note added 2/06)

AN-1434: Crest Factor Invariant RF Power Detector - National Semiconductor Application Note (app note added 2/06)

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AN-691: Operation of RF Detector Products at Low Frequency - AN-691 Analog Devices Application Notes (app note added 6/06)

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AN912: Designing LF Talkback for a Magnetic Base Station - Microchip Application Note Published 5-Mar-04 (app note added 2/06)

RF Detectors: #'s - B C - O P - R S- Z