ANTENNA ARRAY PATTERN NULL STEERING——A THEORETICAL INTRODUCTION

Antenna array pattern null steering—A theoretical introduction

The antenna array pattern null steering is one of the important current topics in the array synthesis theory, due to it's very effectiveness to suppress the interfering signals. Thus in this paper the problem of forming nulls in the radiational pattern of three-dimensional arrays is discussed. This paper deals with the following aspects: The essential relations forming multi-nulls in the arrays are analysed by the method of vector space. A method forming multi-null regions is presented in terms of the extensive property of null itself. The resolvent formulation of the radiational pattern of multi-null steering is derived. The numerical results are given and discussed. The resolvent formulation is analogous to the one of the adaptive arrays.