Live electrooptic imaging of K-band switching actions and parasitic phenomena in MMIC module

It has been successfully demonstrated that K-band signal behaviors in a monolithic microwave integrated circuits (MMIC) module can be visually observed and analyzed. The visual observations and analyses were performed experimentally by the live electrooptic imaging technique. The module consists of three radio-frequency ports and a MMIC chip of DC-50 GHz single pole double throw switch. Its basic switching actions were visualized clearly while the following parasitic phenomena were visually captured; cavity resonances, their dependences on the module operation modes, and coupling between the input and output lines.