Integrated time-varying electromagnetic devices for ultra-wide band nonreciprocity
Integrated time-varying electromagnetic devices for ultra-wide band nonreciprocity
复制标题
用于超宽带非互易性的集成时变电磁装置
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Y. Wang
中科院分区：
文献类型：
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作者：
Mathew Biedka;Qianteng Wu;Xiating Zou;Shihan Qin;Y. Wang
传统的无源以时不变的方式工作，并且受到互易的基本限制，除非涉及磁性材料。介绍了一类以时变方式工作的新型电磁器件。这些时变器件可以在半导体平台上实现，通过参数调制或高速开关来增强其时变特性。这将通过增加新的时间维度来证明互易性可以被解除。提出了两种新型环行器，一种采用时变传输线，另一种采用顺序切换延迟线。潜在的新应用，如全双工无线电和可调谐射频前端可以开发这些新颖的器件概念。
Traditional passives operate in a time-invariant manner and are subject to the fundamental limit of reciprocity unless magnetic material is involved. A new class of electromagnetic devices that are operating in a time-varying fashion is introduced. These time-varying devices may be implemented on semiconductor platforms with their time-dependent property enforced through parametric modulation or high speed switching. It will be demonstrated through addition of the new time dimension the reciprocity can be lifted. Two novel circulators, one with the time-varying transmission line and the other sequentially switched delay line (SSDL) are proposed and demonstrated on-chip. Potential new applications such a full-duplex radios and tunable RF front-ends may be developed with these novel device concepts.