a) Second-hand, stainless steel, small SMA load

The photograph shows an inexpensive load as sold at flea markets. This load type exists in different quality ranges. For inexperienced people it is difficult to distinguish between these types. The measured one is certainly a ‘low’ frequency type and should not be used at frequencies above 5 GHz

b) Professional load with a professional specification

Above 18 GHz the return loss is higher than -20dB. This comes as no surprise. N-connector devices usually cannot be used above 18 GHz without performance degradation