Anritsu Spectrum Master MS2712E User Manual page 106

C-2 Glossary
Antenna : Antenna is a device which radiates and/or receives radio signals,
Antenna
beamwidth : Antenna beamwidth, also known as the half-power beamwidth, is the
Antenna Directivity : Antenna directivity, also known as antenna gain, is the relative gain of
Antenna Efficiency : Antenna Efficiency is the percentage of theoretical gain actually
Antenna Gain : Antenna gain, also known as antenna directivity, is the relative gain of
Antenna, Isotropic : An isotropic antenna is a theoretical point source radiating a spherical
Antenna, Parabolic : A parabolic antenna is an antenna utilizing a reflector that is shaped as
Attenuation : Attenuation refers to decreasing in signal magnitude between two
Attenuator : Attenuator is a device specifically designed to decrease the magnitude
C-2
including RF, microwave, and RADAR.
angle of an antenna pattern or beam over which the relative power is at
or above 50% of the peak power.
the main beam of an antenna pattern to a reference antenna, usually an
isotropic or standard dipole. Antenna Directivity is the percentage of
radiated signal transmitted or received in a given direction related to
beamwidth.
realized from an antenna.
the main beam of an antenna pattern to a reference antenna, usually an
isotropic or standard dipole. Antenna Gain is the effectiveness of a
directional antenna expressed as the ratio of input power of the
directional antenna to input power of an isotropic radiator to provide
the same field strength in the desired direction. Sometimes related to a
dipole antenna.
power envelope.
a paraboloid in order to both concentrate the radiated signal into a
beam and to provide considerable gain. Beamwidth varies inversely and
gain varies directly with the size of the antenna and with frequency.
points. These points may be along a radio path, transmission line or
other devices.
of a signal transmitted through it.
PN: 10580-00251 Rev. T
Glossary of Terms
MS2712E/13E User Guide