Delta SMK (2.92 mm) series connectors
feature maximum VSWR for cable connectors of 1.15:1 from DC to 18 GHz, and 1.3:1 from 18 to 40 GHz. The maximum VSWR for receptacles and adapters is 1.15:1 from DC to 18 GHz, and 1.25:1 from 18 to 40 GHz.
Their interface is similar to that of SMA connectors, but utilizes an air dielectric and a Noryl support bead for higher cutoff frequency than SMA connectors. The internal design is optimized using state-of-the-art Electromagnetic Finite Element Analysis model simulation to provide low reflection coefficient, with mode free operation to 40 GHz.