The power pattern,
(
,
), is a measure of the response of
the antenna to radiation as a function of the angles
and
. It is a normalized (maximum value unity), dimensionless
quantity. It can depend on the frequency of observation.
The beam area or beam solid angle (or pattern solid angle) is
| (60) |
|
|
[
|
beam area, |
|
|
[
|
normalized power pattern of antenna, |
| [
|
infinitesimal solid angle of sky
|
The forward beam and main beam solid angles are the integral of the power
pattern over and the main lobe, respectively, i.e.,
| (61) |
| (62) |