I can also contribute with RF test and characterization. Here we have facilities with benchtop equipments (VNA, SA, some probes, RF generators, ... till 10.5 GHz)... But I had and did experiments with amazing devices like mini/nano-VNAs with really good results (till 3 GHz) and with PlutoSDR and Erasynth/moRFeus generators (till 5 GHz).