Small array illuminations for pattern nulling with sidelobe level control

The present investigation is concerned with a procedure which establishes a theoretical aperture illumination for a small discrete-element linear array which will generate an antenna pattern having both a wide (double-valued) null located at a preassigned angle measured away from the pattern's directional beam peak and sidelobe characteristics meeting a preassigned sidelobe level envelope. An evaluation is conducted of the problem of scanning the double-valued null position throughout the antenna pattern, taking into account two types of feed networks for the array. For some of the cases examined, the double-null point was found to be essentially a triple-null point.