Diode Power Meter prototype

As I'm known as the guy that never finishes a project, here is another one!

This power meter uses a zero bias diode detector to measure the incident power over a 50ohm termination load.

The power meter head provides a voltage proportional to the power, that is conditioned and amplified at the frontend.

Using a polynomial regression over calibration data, the measured power can be accurate displayed at the screen.

At the head, I also used a temperature regulation scheme. An additional diode junction is used to measure the detection junction temperature. With the help of a small 1206 resistor heater, the Arduino closed the loop, maintaining the detector at constant 45 degrees. ... https://www.youtube.com/watch?v=sAa1uHSF7Ew