分布式简并带边振荡器
Distributed Degenerate Band Edge Oscillator
摘要：
我们提出了一类新的振荡器，通过工程的两个耦合周期波导的色散表现出退化的带边（DBE）。DBE是四阶的例外简并点（EPD），即，表示波导系统的四个本征模的合并而没有损耗和增益。我们提出了一种分布式DBE振荡器实现在周期性耦合传输线与一个独特的模式选择方案，导致一个稳定的单频振荡，即使在负载变化的存在。由于EPD概念的独特功能，DBE振荡器可能会提高RF源的效率和性能。这类振荡器是有前途的，以改善离散分布的相干源，并可以扩展到辐射结构，以实现一类新的有源集成天线阵列。
英文摘要：
We propose a new class of oscillators by engineering the dispersion of two-coupled periodic waveguides to exhibit a degenerate band edge (DBE). The DBE is an exceptional point of degeneracy (EPD) of order four, i.e., representing the coalescence of four eigenmodes of a waveguide system without loss and gain. We present a distributed DBE oscillator realized in periodic coupled transmission lines with a unique mode selection scheme that leads to a stable single-frequency oscillation, even in the presence of load variation. The DBE oscillator potentially leads to a boost of the efficiency and performance of RF sources, thanks to the unique features associated to the EPD concept. This class of oscillators is promising for improving discrete-distributed coherent sources and can be extended to radiating structures to achieve a new class of active integrated antenna arrays.
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