Closed Resonant Structure of the Cosmological Fabric

We propose that spacetime can be modeled as a finite, closed, resonant physical fabric, characterized by two intrinsic dynamical bounds: a maximal local saturation frequency and a minimal global coherence period. Treating the vacuum as a tensioned continuous substrate, we show that these bounds naturally define characteristic lengths, energies, tensions, and timescales, including a local astronomical coherence scale and the observed size and age of the Universe. The resulting picture describes a finite, self-oscillating cosmological structure without singularities or external boundary conditions.