## Electronics (Mike Jaroch)

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### H

#### H-FIELD

Any space or region in which a magnetic force is exerted. The magnetic field may be produced by a current-carrying coil or conductor, by a permanent magnet, or by the earth itself [11].

 Keyword(s): H-FIELD

#### H-TYPE T-JUNCTION

A waveguide junction in which the junction arm is parallel to the magnetic lines of force in the main waveguide [11].

 Keyword(s): H-TYPE T-JUNCTION

#### HALF-POWER POINT

A point on a waveform or radar beam that corresponds to half the power of the
maximum power point [8] [9] [18].

 Keyword(s): HALF-POWER POINT

#### HALF-WAVE DIPOLE ANTENNA

An antenna, consisting of two rods (1/4 wavelength each) in a single line, that radiates electromagnetic energy [10].

 Keyword(s): HALF-WAVE DIPOLE ANTENNA

#### HALF-WAVE RECTIFIER

A rectifier using only one-half of each cycle to change ac to pulsating dc
[61 [7].

 Keyword(s): HALF-WAVE RECTIFIER

#### HALF-WAVE VOLTAGE DOUBLER

Two half-wave voltage rectifiers connected to double the input voltage [7].

 Keyword(s): HALF-WAVE VOLTAGE DOUBLER

#### HAND OVER

The operation where one earth terminal yields control to another as a satellite moves out of its area of coverage [17].

 Keyword(s): HAND OVER

#### HARD-TUBE MODULATOR

A high-vacuum electron tube modulator that uses a driver for pulse forming [18].

#### HARMONIC

A frequency that is a whole-number multiple of a smaller base frequency [9] [10] [12] [17].
 Keyword(s): HARMONIC

#### HEAT SHUNT

A device (preferably a clip-on type) used to absorb heat and protect heat-sensitive components during soldering [4].

 Keyword(s): HEAT SHUNT

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