Range-angle-dependent beamforming with FDA using four-dimensional arrays

被引:9
作者
Li, Wen Tao [1 ]
Hei, Yong Qiang [2 ]
Shi, Xiao Wei [1 ]
So, Hing Cheung [3 ]
机构
[1] Xidian Univ, Dept Elect Engn, Xian, Shaanxi, Peoples R China
[2] Xidian Univ, State Key Lab ISN, Xian, Shaanxi, Peoples R China
[3] City Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China
关键词
Four-dimensional array; Frequency diverse array; Range-angle-dependent; Low sidelobe; Multibeam beamforming; FREQUENCY DIVERSE ARRAY; MODULATED LINEAR ARRAYS; PATTERN SYNTHESIS; ANTENNA-ARRAY; RADAR; SUPPRESSION; TARGETS; OFFSET; LEVEL;
D O I
10.1016/j.sigpro.2018.01.016
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
By virtue of its low sidelobe and multibeam pattern characteristic, four-dimensional time-modulated array (TMA) has been attracting considerable attention. Recently, a novel frequency diverse array (FDA), with flexible beam scanning characteristic, has been proposed. So far, TMAs and FDAs are investigated separately, but their integration which may possess both advantages has rarely been reported in the literature. In this paper, a new range-angle-dependent time-modulated frequency diverse array (TMFDA) is proposed. By introducing time-modulated radio frequency switches into the beamfoming network of an FDA, TMFDA can achieve range-angle-dependent patterns, both at the carrier frequency and at the side bands. Additionally, TMFDA has a unique advantage in that its beam direction of the sidebands can be tuned by the pulse duration, switch-on instant and frequency shift, which offers greater design freedom, enabling better performance and a reduction of hardware requirements over FDA. Moreover, the TMFDA has low sidelobe and multibeam pattern characteristic in the joint range and angle domains. Numerical results are presented to validate the superiority of TMFDA characteristics in terms of achieving low sidelobe level, low sideband level and multibeam beamforming. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码:68 / 79
页数:12
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