Module 11 Incomplete
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Power ratio is a term used to express
what property of an antenna?
A standing-wave ratio (swr) describes
which of the following quantities?
- The amount of mismatch between a
- transmission line and its load
Directivity refers to which of the
following properties of a radiated beam?
Narrowness of the beam
Surface angular measurements for
antenna directivity in radar and
communications systems are made in
relationship to which of the following
Horizontal plane only
Radar range is determined as a function
of which of the following measures?
Pulse travel time
The parabolic reflector is often used
because it produces a radiation pattern
with which of the following antenna
A lens antenna which accelerates some
portion of the wavefronts so that all
wavefronts exit the lens at the same time
is referred to as the
In a delay-type lens, the amount of delay
in the phase of the wave passing through
the lens is determined by which of the
The dielectric constant of the lens
What is/are the basic type(s) of antenna
array(s) in common use?
Parasitic and driven
In a frequency-sensitive antenna, the
physical length of the serpentine section
and its relationship to the wavelength of
the applied energy determines which of
the following characteristics?
Direction of the beam
In a horizontal-slot antenna, the
polarization of the energy is radiated in
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