Distributed Degenerate Band Edge Oscillator

We propose a new class of oscillators by engineering the dispersion two-coupled periodic waveguides to exhibit degenerate band edge (DBE). The DBE is an exceptional point degeneracy (EPD) order four, i.e., representing coalescence four eigenmodes waveguide system without loss and gain. present distributed oscillator realized in coupled transmission lines with unique mode selection scheme that leads stable single-frequency oscillation, even presence load variation. potentially boost efficiency performance radio frequency (RF) sources, due features associated EPD concept. This promising for improving discrete-distributed coherent sources can be extended radiating structures achieve active integrated antenna arrays.