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Definition of "Detection" |
The recovery of information from an electrical or electromagnetic signal. The separation of low-frequency (audio) intelligence from the high-frequency carrier. / Detection is the extraction of particular information from a larger stream of information without specific cooperation from or synchronization with the sender. / In microwave and radio-frequency engineering, a stub is a length of transmission line or waveguide that is connected at one end only. The free end of the stub is either left open-circuit or especially in the case of waveguides short-circuited. Neglecting transmission line losses, the input impedance of the stub is purely reactive; either capacitive or inductive, depending on the electrical length of the stub, and on whether it is open or short circuit. Stubs may thus be considered to be frequency-dependent capacitors and frequency-dependent inductors. |
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