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Annex 1� Mathematical models for radiodetermination radar systems antenna�
patterns for use in interference analyses
�1���� Introduction
�2���� Mathematical formulae
������� 2.1���� Radar antenna with a narrow beamwidth
����������������� 2.1.1���� Background
����������������� 2.1.2 �����Theoretical antenna equations
����������������� 2.1.3���� Procedure for mask determination
������� 2.2���� Radar antenna with a cosecant-squared elevation pattern
������� 2.3���� Theoretical diagrams and masks for different antenna radiation
patterns
�3���� Antenna pattern selection
�4���� Antenna pattern comparison
�5���� Approximating three-dimensional (3-D) patterns
�6���� Measured pattern examples
�7���� Patterns for phased array antennas