Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

electromagnetic spectrum
the frequency and wavelength of electromagnetic radiation. We have the following classification reported in the figure, while the microwave frequency band designations is reported in the table.
spectrum
(1) a range of electromagnetic energy ordered in accordance with their relative periodicity.

(2) the magnitude of the Fourier transform of a (deterministic) signal. The word spectrum is also used to refer to the power spectrum of a random process. spectrum analyzer a test system that measures RF or microwave devices in terms
of signal frequency and signal power.
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