Build a Two-Channel RF Power Meter
An RF Power Meter for measurements up to 10 GHz was published in the March & April 2018 edition of Elektor Magazine. The project turned out to be very successful so the author went about improving his device. The version he is currently working on will be compatible with almost all power detector chips available on the market, it will have two channels and a dynamic range of 92 dB. Add to that a touchscreen, Wi-Fi and Bluetooth and you end up with a close to professional measurement tool.