I'm attempting to source / build my own RF power meter based on heating of an RF load. I want this as a sort of a transfer standard so I can use it to calibrate other gear like log detectors, spectrum analysers, etc. The idea is that, if done properly, this type of sensor can be calibrated with DC voltage, and will be very broadband, well into GHz range. This type of gear from Keysight / R&S is orders of magnitude above my budget, LOL. And I wonder if anyone has built something like that, so that I don't end up reinventing the wheel? I don't need a huge dynamic range or a short time constant. I just need RF power measurement that is traceable to DC voltage. If there's not much out there, I might try to build something and document it here.