Nortel 2330 Solution Manual page 80

80 Appendix
With linearly polarized antennas, the polarization of each antenna must be of the same orientation to achieve
maximum energy transfer between the two antennas. If the two linearly polarized antennas are not identically
oriented, there will be a reduction in energy transfer due to polarization mismatch. The table below provides a
summary of polarization mismatch loss between two linearly polarized antennas that do not have the same
angular orientation.
Orientation angle
0.0 (aligned)
15.0
30.0
45.0
60.0
75.0
90.0 (orthogonal)
The following table provides a summary of the polarization mismatch between a linearly polarized and a
circularly polarized wave as a function of the circularly polarized wave's axial ratio. It is assumed that the
circularly polarized wave's field components are orthogonal.
Table 17: Polarization mismatch between linear and circular
Axial Ratio
0.00
0.25
0.50
0.75
1.00
1.50
2.00
3.00
4.00
5.00
10.00
NN47250-503 (323847-C Version 02.01)
Table 16: Polarization mismatch
polarized waves
Minimum Polarization
Loss [dB]
3.01
2.89
2.77
2.65
2.54
2.33
2.12
1.77
1.46
1.19
0.41
Polarization mismatch (dB)
0.00
0.30
1.25
3.01
6.02
11.74
infinite
Maximum Polarization
Loss [dB]
3.01
3.14
3.27
3.40
6.54
3.83
4.12
4.77
5.46
6.19
10.41