Fairview Microwave's SI1560 is a 50 ohm SMA male to 75 ohm BNC female matching pad that operates from DC to 2 GHz. This SMA to BNC impedance matching pad offers a VSWR of 1.4:1 max. SI1560 50 ohm to 75 ohm minimum loss pad has a maximum CW power rating of 1 Watt.&&Matching pads are used to match the different impedance between two devices, maximizing power transfer between the two impedances. Fairview Microwave's minimum loss impedance matching pads are available in various connector combinations to fit your needs, all of which ship the same day.