"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"
Previous set of "E" definitions and terms.
ELEMENT. A substance, in chemistry, that cannot be divided into simpler substances by any means
ordinarily available. A constituent of a device that contributes directly to its operation (e.g., chip resistor, capacitor, diode, transistor, integrated circuit, surface acoustic wave (SAW), substrate, package, etc., incorporated into a device), is an element of the device. A part of an antenna that can be either an active radiator or a parasitic
radiator.
ELEVATION ANGLE. The angle between the horizontal plane and the line of sight to a target or object. Radar Definitions
EMERGENCY POWER. Temporary source of limited electrical power used upon the loss of the normal
power source.
EMF (ELECTROMOTIVE FORCE). The force that causes electricity to flow between two points with
different electrical charges or when there is a difference of potential between the two points. The unit of
measurement is volts.
EMITTER. The element in a transistor that emits current carriers (electrons or holes). [Transistor Manufacturers]
EMITTER-INJECTION MODULATOR. The transistor equivalent of the cathode modulator. The gain
is varied by changing the voltage on the emitter.
ENAMEL. A synthetic compound of cellulose acetate (wood pulp and magnesium). Used to insulate wire
in meters, relays, and motor windings.
ENCAPSULATED. Imbedded in solid material or enclosed in glass or metal.
ENCODE. To use a code to represent individual characters in a message. Here are a number of Encoding Terms.
END-FEED METHOD. A method in which one end of an antenna is connected through a capacitor to the
final output stage of a transmitter. Antenna Definitions
END-FIRE ARRAY. An array in which the direction of radiation is parallel to the axis of the array.
Energized. (alive, live) Electrically connected to a source of potential difference, or electrically
charged so as to have a potential significantly different from that of earth in the vicinity.
ENERGY. The ability or capacity to do work.
EPHEMERIS. A table showing the pre-calculated position of a satellite at any given time.
Ep-Ip CURVE. The characteristic curve of an electron tube used to graphically depict the relationship
between plate voltage (Ep) and plate current (Ip).
EPITAXIAL PROCESS. A method of depositing a thin, uniformly doped crystalline region (layer) on a
substrate.
EPROM. EPROM. or an Erasable PROM [Programmable Read Only Memory]. Read more; EPROM Definition, Manufacturers of EPROM.
EQUATORIAL ORBIT. An orbit that occurs when the plane of a satellite coincides with the plane of the
earth at the equator.
EQUIVALENT RESISTANCE (Req). A resistance that represents the total ohmic values of a circuit
component or group of circuit components. Usually drawn as a single resistor in a simplified circuit.
ERROR. Refer to the page covering Error Terms.
Next set of "E" Terms and Definitions
