基于平面肖特基势垒二极管的太赫兹固态混频器研究

发布时间：2018-04-04 18:26

本文选题：平面肖特基二极管　切入点：太赫兹　出处：《电子科技大学》2017年硕士论文

【摘要】：太赫兹频域是一个有待全面开发的电磁波区域。二十一世纪初,越来越多的专家学者将其研究重心转向太赫兹领域,促进太赫兹技术走出实验室,转化为现实生产力。目前太赫兹技术已在医疗、军事、探测等领域显现出巨大的应用价值。在太赫兹系统中,混频器作为收发前端的重要部件,主要功能为实现太赫兹频谱的上下搬移,其性能与收发系统的实现密切相关。然而当频率升高至太赫兹,稳定可靠的本振源较难获得,因此谐波混频器成为了一种切实可行的思路。本文将围绕太赫兹混频器开展研究,并进行次谐波混频器设计。本文采用两种太赫兹电路设计方法,进行了实践、对比和改进。440GHz次谐波混频器采用基于单元电路的仿真方法,将电路结构拆分成若干个特定功能的部件电路,分别对其优化设计,最终整合并进行匹配设计。仿真设计工作由HFSS与ADS软件联合完成,采用Teratech的AP4/G2/0P64二极管芯片。仿真实现:在射频420~460GHz频带内变频损耗优于10dB。随后对其进行了加工,并在不同本振条件下对其进行了上变频测试。测试结果表明:当输入本振222GHz,驱动功率4.2mW时测试得双边带变频损耗在中频20GHz带宽内均优于15dB,可用带宽较宽。中频18GHz带宽内均优于13.7dB,最佳值11.5dB,且带内平坦无谐振,与仿真结果趋势一致。在此基础上330GHz次谐波混频器采用更先进的基于全局电路的仿真方法,以传输线结构为基础建立完整的电路等效模型,使所有电路结构都作为设计变量,直接进行混频器匹配设计,并使用混频器的整体指标约束其行为。与前者采用相同的二极管芯片,仿真实现:在射频300~350GHz频带内变频损耗优于7.7dB。对比发现基于全局电路的仿真方法设计优势明显。太赫兹混频器是太赫兹系统的重要组件,本文的研究工作将为太赫兹器件的设计提供经验和启发。
[Abstract]:Terahertz is an electromagnetic wave to the regional comprehensive development. At the beginning of twenty-first Century, more and more experts and scholars will be the focus of study of THz technology, promote the terahertz technology out of the laboratory into practical productive forces. The terahertz technology has been in the medical, military and other fields, the detection shows great application value in the terahertz system. The mixer, as an important component of front-end, main functions for the realization of terahertz spectrum shifting, the performance and Realization of transceiver system are closely related. However, when the frequency is increased to a stable and reliable source of terahertz, this is difficult to obtain, so a feasible method of harmonic mixer. This paper will carry out on terahertz mixer research and harmonic mixer design. In this paper, two design methods of terahertz circuits, the practice, comparison and improvement of.440 GHz harmonic mixer using simulation method based on unit circuit, the circuit structure is split into a plurality of circuit components specific function, respectively, to the optimal design, the final integration and matching design. The simulation design work done by HFSS and ADS software, using AP4/G2/0P64 diode chip Teratech. Simulation in RF 420~460GHz frequency band. Conversion loss is better than 10dB. then carries on the processing, the frequency test and the vibration in the different conditions. The test results show that: when the input of the vibration 222GHz, driving power of 4.2mW test with bilateral conversion loss were better than those in the intermediate frequency 20GHz bandwidth 15dB, wide bandwidth 18GHz bandwidth if. The best value is better than that of 13.7dB, 11.5dB, and flat band resonance, the trend is consistent with the simulation result. On the basis of 330GHz harmonic mixer using more advanced based on global power The simulation method of the road, the transmission line structure based on equivalent circuit model and the circuit structure are all as design variables, direct matching mixer design, the overall index constraint and use its behavior. To realize the simulation of mixer and the former uses diode chip, the same: in the RF 300~350GHz frequency band conversion loss is better than 7.7dB. contrast that advantage global circuit design based on simulation method is obvious. Terahertz mixer is an important component of terahertz system, the research work of this paper will provide experience and inspiration for the design of terahertz devices.

【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN773

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