论文标题
约瑟夫森振荡器的分布式活性贴片天线模型
A distributed, active patch antenna model of a Josephson oscillator
论文作者
论文摘要
约瑟夫森振荡器的优化需要对其微波特性的定量理解。约瑟夫森连接的几何形状类似于微带贴片天线。但是，它被DC电流分布在整个连接处的区域上。振荡电场是通过Ac-Josephson效应内部生成的。在这项工作中，我提出了约瑟夫森振荡器的分布式活性贴片天线模型。它考虑了内部约瑟夫森电动力学，并允许确定有效的输入电阻，这将约瑟夫森电流伴随到了连接线形成的传输线中的空腔模式。该模型提供了约瑟夫森振荡器的完整表征，并解释了低辐射功率效率的起源。最后，我讨论了优化的约瑟夫森贴片振荡器的设计，该振荡器能够达到高效率和辐射功率，以使其发射到自由空间中。
Optimization of Josephson oscillators requires a quantitative understanding of their microwave properties. A Josephson junction has a geometry similar to a microstrip patch antenna. However, it is biased by a dc-current, distributed over the whole area of the junction. The oscillating electric field is generated internally via the ac-Josephson effect. In this work I present a distributed, active patch antenna model of a Josephson oscillator. It takes into account the internal Josephson electrodynamics and allows determination of the effective input resistance, which couples Josephson current to cavity modes in the transmission line formed by the junction. The model provides full characterization of Josephson oscillators and explains the origin of low radiative power efficiency. Finally, I discuss the design of an optimized Josephson patch oscillator, capable of reaching high efficiency and radiation power for emission into free space.
