Differential Mode InterferenceA signal that appears on two lines of a closed loop, but current flow is in opposite directions.
DiodeA two-terminal semiconductor device that rectifies signals (passes current in only one direction).
Dipole AntennaSimplest and most widely used class of antenna. It consists of two identical conductive elements such as metal wires or rods, which are usually bilaterally symmetrical.
Down ConvertersA device which provides frequency conversion to a lower frequency, e.g. in digital broadcast satellite applications.
Dual-BandAn antenna that has two modes of operation.
Effective Radiated PowerA standardized theoretical measurement of radio frequency (RF) energy using the SI unit watts. It is determined by subtracting system losses and adding system gains.
Electostatic FieldWhen two objects in each other's vicinity have different electrical charges, an electrostatic field exists between them. An electrostatic field also forms around any single object that is electrically charged with respect to its environment. An object is negatively charged (-) if it has an(...)
Electric FieldThe electric force experienced by a motionless electrically charged test particle at any point in space relative to the source(s) of the field.
Electromagnetic CompatibilityThe branch of electrical sciences which studies the unintentional generation, propagation and reception of electromagnetic energy with reference to the unwanted effects (electromagnetic interference, or EMI) that such energy may induce.
EMCThe branch of electrical sciences which studies the unintentional generation, propagation and reception of electromagnetic energy with reference to the unwanted effects (electromagnetic interference, or EMI) that such energy may induce.
Electromagnetic DisturbanceDisturbance that interrupts, obstructs, or otherwise degrades or limits the effective performance of electronics and electrical equipment.
Electromagnetic FieldA physical field produced by electrically charged objects. Also known as EM Field or EMF.
EMFA physical field produced by electrically charged objects. Also known as EM Field or EMF.
Electromagnetic InterferenceDisturbance that affects an electrical circuit due to either electromagnetic induction or electromagnetic radiation emitted from an external source.
EMIDisturbance that affects an electrical circuit due to either electromagnetic induction or electromagnetic radiation emitted from an external source.
Electromagnetic PulseA short burst of electromagnetic energy. Also known as EMP or transient distrubance.
EMPA short burst of electromagnetic energy. Also known as EMP or transient distrubance.
Electromagnetic RadiationForm of energy emitted and absorbed by charged particles which exhibits wave-like behavior as it travels through space.
Electronic ChokeA version of a passive two-terminal electronic component called an inductor which is designed specifically for blocking higher-frequency alternating current (AC) in an electrical circuit, while allowing lower frequency or DC current to pass.
Electrostatic DischargeSudden flow of electricity between two electrically charged objects caused by contact, an electrical short, or dielectric breakdown.
