Nortel WLAN Security Switch 2361 Guía de instalación descargar pdf (Pagina 81)

Appendix 81

Avaya WLAN 2332 Series Outdoor Solution Guide

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.

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 15: Polarization mismatch

Orientation angle Polarization mismatch (dB)

0.0 (aligned) 0.00

15.0 0.30

30.0 1.25

45.0 3.01

60.0 6.02

75.0 11.74

90.0 (orthogonal) infinite

Table 16: Polarization mismatch between linear and circular

polarized waves

Axial Ratio

Minimum Polarization

Loss [dB]

Maximum Polarization

Loss [dB]

0.00 3.01 3.01

0.25 2.89 3.14

0.50 2.77 3.27

0.75 2.65 3.40

1.00 2.54 6.54

1.50 2.33 3.83

2.00 2.12 4.12

3.00 1.77 4.77

4.00 1.46 5.46

5.00 1.19 6.19

10.00 0.41 10.41

1 2 ... 76 77 78 79 80 81 82 83 84 85 86 ... 119 120

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Nortel WLAN Security Switch 2361 Guía de instalación Pagina 81