面向低轨互联网卫星的超宽带毫米波预失真线性化器芯片设计理论与方法
结题报告
批准号:
62001372
项目类别:
青年科学基金项目
资助金额:
24.0 万元
负责人:
张大为
学科分类:
电磁场与波
结题年份:
2023
批准年份:
2020
项目状态:
已结题
项目参与者:
张大为
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中文摘要
低轨互联网卫星系统具有大容量、低延时、覆盖广、5G融合等优点,是未来无线通信网络的重要发展方向。卫星采用毫米波超宽带转发和批量组网的方案,要求其中用于改善功率放大器非线性失真的预失真线性化器具有超宽带非线性补偿和芯片化集成的特性;而如何实现相应特性的线性化器,是制约低轨互联网卫星应用的一大瓶颈。申请人前期通过将左手材料传输线引入线性化器方案,建立了宽带的线性化器芯片设计理论,然而对于超宽带毫米波应用还需攻克一系列难题。本项目将进一步研究超宽带和毫米波条件下左手材料传输线和非线性产生器的性能退化机制,建立改进的设计方法;分析毫米波频段左手材料传输线随频率变化的群时延因子在超宽带线性化器中的作用机理,以实现超宽带的预失真补偿特性;利用砷化镓工艺,进行线性化器芯片的仿真设计、流片加工,并通过测试进行验证。本项目的研究丰富了超宽带线性化器设计理论,能为未来低轨互联网星座建设提供关键芯片解决方案。
英文摘要
Low-earth-orbit (LEO) internet satellite system offers the advantages of large capacity, low latency, wide coverage, and 5G-network convergence, which makes it an important development direction for future wireless communication network. Due to the millimeter-wave ultra-wideband transponder policy and large-volume networking scheme of LEO internet satellite, very stringent requirements of ultra-wideband predistortion linearization performance and chip integration have been imposed on the predistortion linearizer aiming at linearity improvement of the power amplifier; and, how to achieve the corresponding characteristic of the linearizer is now becoming a major problem restricting the application of LEO internet satellite. The applicant has established a design theory of broadband linearizer chip by introducing the left-handed transmission line into the linearizer architecture in the early stage. However, we still have to overcome a series of problems to apply the proposed theory for ultra-wideband millimeter-wave applications. In this project, we will further study the performance degradation mechanism of left-handed transmission line and nonlinear generator under ultra-wideband and millimeter-wave condition, and establish a design method to improve the wideband performance of them; then, we will analyze the impact of frequency-dependent group delay factor of the left-handed transmission line on the proposed ultra-wideband millimeter-wave linearizer, to find out how to achieve the ultra-wideband nonlinearity compensation performance of the power amplifier. On these bases, the linearizer chip will be further designed by simulation, fabricated using Gallium Arsenide process, and will be verified by measurement. The research results of this project will enrich the design theory of ultra-wideband linearizer, and will provide key chip solution for the future LEO internet satellite constellation system.
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DOI:10.1109/tmtt.2022.3219404
发表时间:2023-04
期刊:IEEE Transactions on Microwave Theory and Techniques
影响因子:4.3
作者:Dawei Zhang;Wenli Fu;Xiangke Deng;Xin Xu;Bo Zhang;Hongxi Yu;Kaixue Ma
通讯作者:Dawei Zhang;Wenli Fu;Xiangke Deng;Xin Xu;Bo Zhang;Hongxi Yu;Kaixue Ma
DOI:--
发表时间:2022
期刊:红外与毫米波学报
影响因子:--
作者:张大为;徐鑫;李斌;徐辉;于洪喜;李军;马凯学;THANGARASU Bharatha Kumar;YEO Kiat Seng
通讯作者:YEO Kiat Seng
国内基金
海外基金