The 142-0701-801 is an end launch SMA RF Coaxial Connector is attached to the circuit board by inserting the board edge between the legs and soldering the legs and centre conductor to pads on the board. For optimum high frequency performance, the connector to circuit board transition must be adjusted for low VSWR. To compensate for the transition from coax to microstrip, trace widths "A" and "B" must be adjusted based on circuit board thickness. When properly adjusted, this technique yields a low VSWR over a wide bandwidth.