84. Electronics; radiowave and microwave technology; direct energy
conversion and storage
84.30.-r Electronic circuits (for integrated circuits, see 85.40)
84.30.Bv Circuit theory (including computer-aided circuit design and
analysis)
84.30.Jc Power electronics, power supply circuits
(see also 84.70 High-current and high-voltage technology)
84.30.Le Amplifiers
84.30.Ng Oscillators, pulse generators, and function generators
84.30.Qi Modulators and demodulators; discriminators, comparators, mixers,
limiters, and compressors
84.30.Sk Pulse and digital circuits (for pulse generators, see 84.30.N)
84.30.Vn Filters
84.30.Yq Other electronic circuits
84.32.-y Passive circuit components
(see also 07.50 Electrical and electronic components,
instruments, and techniques)
84.32.Dd Connectors, relays, and switches
84.32.Ff Conductors, resistors (including thermistors, varistors, and
photoresistors)
84.32.Hh Inductors and coils; wiring
84.32.Tt Capacitors
84.32.Vv Fuses
84.35.+i Neural networks
(for optical neural networks, see 42.79.T, see also 07.05.M
Neural networks, fuzzy logic, artificial intelligence)
84.37.+q Electric variable measurements (including voltage, current
resistance, capacitance, inductance, impedance, and admittance,
etc.)
84.40.-x Radiowave and microwave propagation (including millimeter wave)
technology
84.40.Az Waveguides, transmission lines, striplines
84.40.Ba Antennas: theory, components and accessories
(for plasma interactions with antennas, see 52.40.F in Plasma
physics)
84.40.Dc Microwave circuits
84.40.Fe Microwave tubes (e.g. klystrons, magnetrons, traveling-wave,
backward-wave tubes, etc.)
84.40.Ik Masers; gyrotrons (cyclotron-resonance masers)
84.40.Lj Microwave integrated electronics
84.40.Ua Telecommunications: signal transimssion and processing;
communication satellites
(for optical communications, see 42.79.S)
84.40.Xb Telemetry: remote control, remote sensing; radar
84.40.Zc Other topics in radiowave and microwave technology
84.47.+w Vacuum tubes
(see also 85.45 Vacuum microelectronics)
84.50.+d Electric motors
84.60.-h Direct energy conversion and storage
84.60.Bk Performance characteristics of energy conversion systems; figure
of merit
84.60.Dn Electrochemical conversion and storage: electrochemical cells and
batteries; fuel cells
84.60.Jt Photoelectric conversion: solar cells and arrays
(for solar collectors and concentrators, see 42.79.E)
84.60.Lw Magnetohydrodynamic conversion (for MHD generators, see 52.75.F)
84.60.Ny Thermionic conversion
84.60.Rb Thermoelectric, electrogasdynamic and other direct energy conversion
84.60.Ve Energy storage systems, including capacitor banks
84.70.+p High-current and high-voltage technology: power systems; power
transmission lines and cables (including superconducting cables)
84.90.+a Other topics in electronics, radiowave and microwave technology,
and direct energy conversion and storage