Distributed Degenerate Band Edge Oscillator
Abstract
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.
Cite
@article{arxiv.2002.00857,
title = {Distributed Degenerate Band Edge Oscillator},
author = {Ahmed F. Abdelshafy and Dmitry Oshmarin and Mohamed A. K. Othman and Michael M. Green and Filippo Capolino},
journal= {arXiv preprint arXiv:2002.00857},
year = {2020}
}