Design of an Array Antenna Consisting of Three Dual Antenna Sets with a Narrow Array Distance for Interference Mitigation

Abstract

In this paper, we propose a circular array antenna consisting of three dual antenna sets to maximize the number of the array elements in a limited platform size for interference mitigation application. The dual antenna set contains two radiators of a rectangular loop patch and a monopole antenna, which are integrated almost in the same place. To verify the feasibility of the proposed array, the antenna characteristics of the dual antenna set arc measured in a full anechoic chamber. The measured peak gains in the upper hemisphere of the monopole and patch elements are 4.7 dBi and 7.0 dBi, respectively. In addition, the nulling performance is observed to mitigate the live interference signals with optimum weights of each clement. In this null pattern, the minimum null depth of 64.6 dB and the maximum null width of 15 are achieved among the five nulling points.