Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

antenna beamwidth
the effective angular extent of the antenna radiation pattern usually specified between points of fixed amplitude relative to the main lobe gain (e.g., -3 dB points).
beam
(1) transverse spatial localization of the power in a wave field.
(2) a slender unidirectional stream of particles or radiation.
electron beam
excitation electron impact excitation due to a free electron beam rather than, for example, the conduction electrons in a gas discharge; permits high-pressure excitation without arcing.
electron beam welding
a welding process that produces coalescence of metals with the heat obtained from a concentrated beam composed primarily of high-velocity electrons impinging on the surfaces to be joined.
electron-beam lithography
refers to a lithographic (or photographic) process in which the exposure energy is provided by the energy carried by a beam of focused electrons rather than by photons (light).