Vector Network Analyser (VNA) calibration is an essential part of ensuring accurate measurements for frequency dependent devices. The project conducted is the design of an inline electronic VNA calibration device that utilises radio frequency (RF) switches. This device aims to reduce the amount of time taken to perform mechanical calibration for 2 port VNA device. The calibration standards used on the device are the Short, Open, Load and Thru (SOLT) NIST standards.