scope:

This Recommendation provides average and related reference radiation patterns for line-of-sight point-topoint fixed wireless system (FWS) antennas in the frequency range from 1 GHz to about 70 GHz. The analysis in this Recommendation may be used in certain coordination studies and interference assessments when particular information concerning the FWS antenna is not available.

The ITU Radiocommunication Assembly,

considering

a) that the reference radiation pattern of line-of-sight point-to-point fixed wireless system (FWS) antennas stated in Recommendation ITU-R F.699 gives the peak envelope of side-lobe patterns;

b) that if the peak envelope radiation pattern is used in the assessment of the aggregate interference consisting of many interference entries, the predicted interference will result in values that are greater than values that would be experienced in practice;

c) that, therefore, it is necessary to use the antenna radiation pattern representing average sidelobe levels in the following cases:

- to predict the aggregate interference to a geostationary or non-geostationary satellite from numerous radio-relay stations;

- to predict the aggregate interference to a radio-relay station from many geostationary satellites;

- to predict interference to a radio-relay station from one or more non-geostationary satellites under the continuously variable angle which should be averaged;

- in any other cases where the use of the radiation pattern representing average side-lobe levels is appropriate;

d) that a simple mathematical formula is preferable to the radiation pattern representing average side-lobe levels;

e) that a mathematical model is also required for generalized radiation patterns of antennas for statistical interference analyses involving a few interference entries such as from geostationary satellites into systems in the fixed service