Despite Continuing Rumors of This Segment’s Demise, This Legacy Market Continues to Resist GaN’s Intrusion

by Lance Wilson | 1Q 2020 | IN-5749
Vacuum Electron Devices (VEDs), also known as electron tubes, represent one of electronics’ early legacy markets. They have been around for well over 100 years and their basic operation is still the same. One section of this market segment is for VEDs that operate in the microwave and millimeter wave areas (>1 GHz). Most of this class of tubes are characterized by operation in strong magnetic fields, and their power ranges can go from a few watts to tens of megawatts. ABI Research classifies these tubes into five categories: Travelling-Wave Tubes (TWT), klystrons, magnetrons, Crossed-Field Amplifiers (CFA), and gyrotrons.

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