Dimensional Admissibility Predicts Invariant Frequency Anomalies in Electromagnetic Resonators

This preprint presents a parameter-free, falsifiable prediction of an invariant frequencyanomaly in electromagnetic resonators derived from dimensional admissibility constraintswithin the Quantized Dimensional Ledger (QDL) framework. The work specifies an explicit dimensionless closure ratio Φ_c = 1 ± 10⁻⁶, provides acanonical microwave cavity test case with concrete numeric targets, and defines apreregistered blind analysis protocol with statistical power and multiple-testing controls.The predicted anomaly is invariant under cavity geometry and material composition and isnot expected within standard electrodynamics or cavity QED. The paper proposes a clean tabletop test of dimensional admissibility as a physicalconstraint and is undergoing journal peer review.