1. Vacuum Electron Devices
- Traveling-wave tubes (all types)
- Crossed-field devices (oscillators and amplifiers)
- Klystrons
- Multiple-beam devices
- Inductive output tubes
- Fast-wave devices (gyrotrons, gyro-amplifiers)
- Free electron lasers and masers
- Pulse compression devices
- Plasma filled amplifiers and oscillators
- High power microwave devices / RF directed energy
- Triodes, tetrodes and pentodes
- Power switches
2. Vacuum Microelectronics / Nanoelectronics
- Microwave, millimetre-wave & THz amplifiers and oscillators
- Field emitter arrays
- Flat panel displays
- Sensors and detectors
3. Systems and Subsystems
- Microwave and millimetre-wave power modules
- Electronic power conditioners, modulators, and supplies
- Linearizers
- Amplifier/antenna coupling
- Device and system integration
- Reliability
4. Technologies
- Cathodes and other electron emitters
- Component parts (e.g. guns, circuits, windows, collectors)
- Analysis and computer modelling
- Novel materials (e.g. dielectrics, coatings, magnetic materials)
- Electron emission
- RF breakdown
- Linearity, intermodulation and noise
- Novel measurement techniques
- Miniaturization
- Thermal power management and control
5. Applications of Vacuum Electron Devices
- Defense
- Radar
- Telecommunications
- Medicine
- Particle accelerators
- RF interference
- Instruments and lithography
- Materials Processing
- Television
- Displays
- Electric Propulsion
