The 10° values will be interpolated.Įnter datasheet Azimuth gain data in the Green area with the plot being displayed on the Green chart. The sheet provides a chart display and also allows 0 dB values to be inserted if required in the Azimuth and Elevation data columns.Īctual Azimuth and Elevation gain data can be entered at 10° intervals by ignoring the 5° columns and leaving them blank. Instructions for use are included at the top of the spreadsheet, but are repeated here for reference purposes. So, if line 1 is does not equal line 451 or line 181 does not equal line 631, then the file is not valid. Those two points are at line 1 and line 181 for the horizontal pattern, and lines 451 and 631 for the vertical pattern. So, the horizontal curves and the vertical curves would intersect at two points: to the North and to the South, both at elevation angle zero. The vertical plane would start at the Zenith over your head and move down to the North, then under your feet, South, and back to the Zenith. In that case, the horizontal plane would have all values at elevation angle zero and would start at azimuth zero, moving toward East, South, West, and back to North. In system, if the antenna azimuth is zero and the antenna elevation angle is zero, the antenna will point to the North. The values for the horizontal plane and vertical plane generate two curves that intersect at two places. If the antenna pattern is complex, there is a chance that the interpolation can give erratic results when the beam is pointing away from the recorded values. If the link direction is outside those planes, the program will interpolate a value. In the file, each plane has 360 values, the horizontal first, followed by the vertical. The antenna file only contains values in the horizontal plane and vertical plane. If the radio beam of a path does not correspond to the direction where the antenna is pointing, the program will use the values in the antenna file to calculate the correction needed. The values in antenna file are used to modify that value. The antenna gain entered in the Coverage is the maximum gain of the antenna. The antenna gain is defined in your Coverage parameters, not in the antenna file. Radio Mobile Compatible antenna files (XXXXXX.ant) are text files.Įach line is a relative gain in dB, and are normally zero or negative values.Ī complete antenna file should contain 720 rows.
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