- Joined Nov 28, 2014
The word "detect" used here does not mean what you think. It is not determining the presence or absence of a signal. In radio, a detector is a circuit that extracts the modulated signal (audio, video, whatever) from the carrier wave. The schematic shows a basic AM (amplitude modulation) detector.Can any one explain how this circuit detects RF signals
My company used a similar circuit to detect the level of microwave radiometer signals on an earth orbit weather satellite except it used back (tunnel) diodes, instead of Schottkys, for better sensitivity.Looks like it detects by diode rectification of the RF waveform
Google that term...it is mainly for AM modulation.
How it is used to detect the mobile signalsIts an AM detection circuit, the diode is a half wave rectifier and the RC filter removes the carrier, so the result is the original modulation audio.
If there's a RF input, you will get a DC output.How it is used to detect the mobile signals
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