The QATN from Qualwave is a Between Series RF Adapter with Contact Resistance 5 mOhms(Outer), 3 mOhms(Center), Frequency DC to 18 GHz, Insertion Loss 0.04 to 0.1 dB, Mating Cycles 500 Cycles, Temperature -55 to 165 Degree C. More details for QATN can be seen below.