Antenna Beampattern With Range Null Control Using Weighted Frequency Diverse Array
Yi Liao, Hu Tang, Xiaolong Chen, Wen-Qin Wang, Mengdao Xing, Zhi Zheng, Jian Wang, Qing Liu
Abstract
The range-angle-dependent beampattern of frequency diverse array (FDA) makes it capable of dealing with range-dependent interference, which cannot be handled by conventional phased array. However, current publications pay more attention to the dot-shaped beam forming, which is not suitable for the range-dependent jamming signal suppression. To address this problem, this paper proposes a weight designing method to control the nulls distribution among range bins in the mainbeam. With the additional degrees of freedom provided by FDA, it is possible to flexibly adjust the positions and notch widths of the range nulls. The performance and effectiveness of the proposed weighted FDA are validated with numerical simulations.