Light Weight Active 1 – 18 GHz Ultra High Speed SPDT Switch for Radar Warning Receiver Systems

This article presents design and implementation of discrete components based ultra-wideband high speed SPDT switch. Here switch and equalizer are designed separately and integrated with LNA in a single housing. Individual semi active and passive components are designed in 2½ D and 3D full wave EM simulator for 1–18 GHz frequency. Layout implementation of whole circuit has been in CPWG technique instead of normal microstrip line for achieving more isolations between nearest two arms at highest frequencies. Then full system analysis is carried out in 2½ D software of all components. Very high speed driver also designed using simple transistor and NAND gate circuits. Measured results of the proposed switch are found in good agreement with the simulated results.