Development of an Ultra-Wideband Suspended Stripline to Shielded Microstrip Transition

A novel ultra-wideband suspended stripline to shielded microstrip transition is presented here with measurement results. The novel transition has less than 0.2 dB insertion loss and better than 15 dB return loss over dc to 40 GHz. This transition design addresses the interconnection challenge between suspended stripline and shielded microstrip circuits, such as in assemblies where the active circuitry is in MS environment, and the passive circuitry is in low-loss SS environment. The described design allows for less critical mechanical tolerance and is less sensitive to misalignment.