Vertical plane pattern calculations for shaped beam reflectors with multiple feeds

The calculation of approximating vertical plane radiation patterns for doubly curved shaped beam antenna reflectors illuminated by a multiple feed is discussed. Separability of the vertical and horizontal plane patterns is assumed. A calculated example for a two-element feed is compared with measured pattern data. Farfield pattern shaping behavior with multiple feed excitation is described in terms of vector superposition of the patterns due to the individual feed elements.