Figure 100: Reference frame for the point of interest (POI) cylindrical co-ordinates
Per the reference frame in Figure 100: Reference frame for the point of interest (POI) cylindrical co-
ordinates on page 156, the cylindrical-wave model is applicable in the volume described in cylindrical
co-ordinates for omni-directional array antennas as follows:
where
available power at the antenna port (W);
physical antenna length (metres);
peak antenna directivity (unit-less), assumed equal to the peak gain ;
electrical down-tilt angle of the antenna main beam (radians), and
is the distance from the antenna center (metres). Spatial power density averaging may be required by
some regulations. As the formula (1) predicts the peak power density, it represents a conservative
estimate of the average power density. Thus there is no need to compute the latter.
Appendix F : MOTOTRBO Repeater – EME ASSESSMENT
Motorola Solutions Confidential
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