Scanning in multimodule antenna arrays with stair-step amplitude-phase distribution element excitation

Abstract

The investigation results on grating lobes suppression method are described in this paper. Grating lobes appear in pattern of multimodule antenna array, if stair-step phase distribution of element excitation is used. Stair-step here means the case when the phase of elements is constant within one module, and changes linearly from one module to adjacent. Described approach makes possible to excite every module from one common source and shorten, for example, the total transmit / receive module quantity in multimodule digital active antenna array by a factor equal to the radiators quantity in one array's module.

Keywords

• multimodule antenna array
• phase scanning
• amplitude distribution
• grating lobes