The circuit detects, demodulates the amplitude and amplifies high frequency electromagnetic emissions (100 MHz to 2.5 GHz approx) for audio frequency output. The main component is the Analog Devices AD8313 IC: RF logarithmic detector and controller, whose output is further amplified by a TL082/LM358 op-amp.
All Kicad and Gerber files: await Alpha release
Schematic:
- 10 ohm x 2 , 4.7k , 51 ohm (47ohm), 20k, 50k
- 100n x2 , 680 pf x2
- LM358
- AD8313