ITU-R S.465-5-1993 Reference Earth-Station Radiation Pattern for Use in Coordination and Interference Assessment in the Frequency Range from 2 to About 30 GHz
The ITU Radiocommunication Assembly,
considering
a) that, for coordination studies and for the assessment of mutual interference between radiocommunicationsatellite
systems and between earth stations of such systems and stations of other services sharing the same frequency band, it may be necessary to use a single radiation pattern for the earth-station antenna;
b) that, for the determination of coordination distance and for the assessment of interference between earth and terrestrial stations, a radiation pattern based on the level exceeded by a small percentage of the side-lobe peaks may be
appropriate;
c) that, for coordination studies and for the assessment of interference between earth stations and space stations,a radiation pattern for the region near the main beam based on the envelope of the peak power of the side lobes in this
region may be appropriate;
d) that, at angles relative to the axis of the main beam where effects peculiar to the particular feed system used do not contribute appreciably to the power in the side lobes, the radiation patterns for numerous existing earth-station
antennas show only moderate scatter about a simple generalized radiation pattern, at least within the frequency range 2-30 GHz;
e) that, for systems of the Cassegrain type over the range of angles relative to the axis of the main beam where contributions to the side-lobe power occur primarily as a result of spill-over, the patterns of a number of existing
antennas also show reasonable agreement;
f>that, at large angles, the likelihood of local ground reflections must be considered;
g)that the use of antennas with the best achievable radiation patterns will lead to the most efficient use of the radio-frequency spectrum and the geostationary-satellite orbit.
ITU-R S.465-5-1993 history
2010ITU-R S.465-2010 Reference radiation pattern of earth station antennas in the fixed-satellite service for use in coordination and interference assessment in the frequency range from 2 to 31 GHz
1993ITU-R S.465-5-1993 Reference Earth-Station Radiation Pattern for Use in Coordination and Interference Assessment in the Frequency Range from 2 to About 30 GHz
ITU-R S.465-5-1993 Reference Earth-Station Radiation Pattern for Use in Coordination and Interference Assessment in the Frequency Range from 2 to About 30 GHz was changed to ITU-R S.465-2010 Reference radiation pattern of earth station antennas in the fixed-satellite service for use in coordination and interference assessment in the frequency range from 2 to 31 GHz.