基于混合波束赋形的低轨通信卫星相控阵天线架构研究

doi:10.11959/j.issn.2096-8930.2021025

Abstract

Abstract:

Due to the characteristics of low earth orbit (LEO) communication satellite system like low propagation loss, small propagation delay and high pointing accuracy, a hybrid architecture-“analog beamforming stage and digital beamforming (DBF) stage” was proposed, and the principle and advantages of hybrid beamforming were analyzed.Through three dimensional integrating of multi-channel RF frontend chips, mixers, dedicated DBF ASIC chips, and tiles phased array anntena arrays, the proposed hybrid beamforming could be expanded or spliced.This hybrid architecture achieved the optimization of performance, cost, complexity and power consumption, and provided a reference for China to build space based internet of things system and reconfi gurable phased array antenna system in the future.

Key words: space based internet of things, reconfi gurable phased array antenna, hybrid beamforming, chip assembly, tiles

CLC Number:

TN927

Rong HU, Xiumei LI, Juan DENG, Jun ZHOU, Shujing DONG, Ling LIU, Wenying MA. Research on the Architecture of Phased Array Antenna of LEO Communication Satellites Based on Hybrid Beamforming[J]. Space-Integrated-Ground Information Networks, 2021, 2(2): 90-97.

Figures/Tables 10

References 22

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器件	器件典型功耗/mW	器件数量/个
器件	器件典型功耗/mW	模拟合成	数字合成	混合合成
低噪声放大器	30	N	N	N
可变增益放大器	10	N	0	N
移相器	5	N	0	N
N合1合成器（M合1合成器）	0	1	0	N/M
混频器	10	1	N	N/M
模数转换器	20	1	N	N/M
数字波束合成器（L个通道）	70	0	N/L	N/M/L

器件	器件典型功耗/mW	器件数量/个
器件	器件典型功耗/mW	模拟合成	数字合成	混合合成
数字波束分配器（L个通道）	70	0	N/L	N/M/L
数模转换器	20	1	N	N/M
混频器	10	1	N	N/M
1分N功分器（1分M功分器）	0	1	0	N/M
移相器	5	N	0	N
可变增益放大器	10	N	0	N
功率放大器	130	N	N	N

波束赋形方式	性能	成本	体积	工艺复杂度	可扩展性	射频损耗
全模拟	性能低、功耗低	低廉	小	简单	难	高
全数字	性能高、功耗高	昂贵	大	复杂	易	低
混合波束	性能高、功耗较低	适中	适中	适中	易	低

Research on the Architecture of Phased Array Antenna of LEO Communication Satellites Based on Hybrid Beamforming

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