Browse the glossary using this index

Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL

Page: (Previous)   1  2  3  4  5  6  7  8  9  10  (Next)
  ALL

D

DIRECT CURRENT

An electric current that flows in one direction only [1].

DIRECT SHORT

Same as SHORT CIRCUIT [3].

DIRECTIONAL ANTENNA

An antenna that radiates most effectively in only one direction [18].

DIRECTIONAL COUPLER

A device that samples the energy traveling in a waveguide in one direction
only [11].


DIRECTIVITY

The ability of an antenna to radiate or receive more energy in some directions than in others. The degree of sharpness of the antenna beam [10] [11] [18].


DIRECTLY HEATED CATHODE

A wire, or filament, designed to emit the electrons that flow from
cathode to plate. The filament is designed so that a current is passed through it; the current heats the filament to the point where electrons are emitted [6].


DIRECTOR

The parasitic element of an array that reinforces energy coming from the driver element [10].


DISCRETE COMPONENTS

Individual transistors, diodes, resistors, capacitors, and inductors [14].

DISCRIMINATOR

A circuit in which amplitude variations are derived in response to phase or frequency variations [18].


DISPERSION

The refraction of light waves that causes the different frequencies to bend at slightly different angles [10].



Page: (Previous)   1  2  3  4  5  6  7  8  9  10  (Next)
  ALL