Enhanced Performance of 264 GHz EIO Subsystem

This paper summarizes the performance improvements of a 264 GHz EIO subsystem achieved over the last decade. Every characteristic, practical, and reliability aspects were considered and addressed. Newer mechanical tuning provides operation with 5 W output power across a 1 GHz frequency range. Reduced voltage ripple of the Gen-IV power supply provides RF signal with linewidth of less than 4 MHz. Available LifeExtender option has the capability to extend a cathode’s lifetime beyond three years of continuous operation. A modified water-cooling design prevents electro-etching of the miniature RF circuit, while the collector has a depression capability of up to 77%.