Balluff BIS U Basishandbuch Seite 44

BIS U Basic Manual
4
Reference Antennas and Antenna Parameters
4.8 Axial Ratio
4.9 Power Rating
14
On real antennas, however, the deflection achieved along both spatial axes is never exactly the
same. The polarization ellipse that develops is illustrated by the axial ratio of the two
components. A typical value 1 dB is specified for the BIS U 302 antenna.
(V axis) / (H axis) = 1 or 0 dB
Figure 7: Axial ratio of a circular polarized antenna
Describes the maximum effective power with which the antenna can operate.
(V axis) / (H axis) = 2 or 3 dB
Vertical axis
(V axis)
Horizontal axis
(H axis)