Ad 1 It isn't my schematic only Dl4JAL. I use matching circuit.
Ad 2 In my opinion preferable mixer is AD831. ADE-1 has IP3 +15dBm, AD831 +24dBm but for optimum performance you must set correct LO level. This is very important.
Ad 2 In my opinion preferable mixer is AD831. ADE-1 has IP3 +15dBm, AD831 +24dBm but for optimum performance you must set correct LO level. This is very important.