This approach the problem of conquers phase excursion and frequency drift that anciently adopts fixed frequency filter and its frame is simple.

And there is much more phase delay, when the fabrication excursion is perpendicular to the incident wave polarized direction.

Based on homogeneous model and with the application of nonlinear bifurcation theory, this paper presents prediction of static bifurcation (flow excursion) diagram of two-phase natural circulation.