RECOMMENDATION ITU-R SA.1345 - METHODS FOR PREDICTING RADIATION PATTERNS OF LARGE ANTENNAS USED FOR ...
ANNEX 1 - Suitability of various electromagnetic modelling methods to predict the gain and radiation patterns of large reflec
1 Introduction
2 Analytical and numerical methods
    2.1 Method of moments
    2.2 Aperture field method
    2.3 Scalar radiation integral/projected aperture method
    2.4 Physical optics
    2.5 Geometrical theory of diffraction
    2.6 Aperture blockage and strut effects
3 Recommendations
ANNEX 2 - Analysis using experimental data
1 Introduction
2 Near-field measurements
3 Microwave holography
4 Theodolite based measurements
5 Close range photogrammetry
ANNEX 3 -Example results of computer modelling
1 Introduction
2 Model methodology
3 Antenna mechanical parameters
4 Model results
    4.1 Far-field and near-field at 150 MHz
    4.2 Far-field at 5 000 MHz, with and without struts
    4.3 Far-field at 5 000 MHz, with and without surface distortions
    4.4 Far-field and near-field at 5 000 MHz, without struts
    4.5 Comparison of measured pattern with model prediction
5 Conclusions
    5.1 Feed support struts
    5.2 Feed gain pattern
    5.3 Surface distortions