Non-Radiative Electromagnetic Near-Field Coupler: A Topological Electromagnetic Structure for Local Gravitomagnetic Effect Detection

“This paper proposes a topological electromagnetic structure based on opposing conical coils, which generates a localized rotating near-field with suppressed far-field radiation. Under optimized conditions (20° cone angle, 10 turns, 50 A pulse, second-order resonance), the structure produces a waist magnetic field of ~53 mT, an equivalent electric field of ~1.6×10⁷ V/m, and a local energy density of ~10³ J/m³. Based on weak-field gravitoelectromagnetic (GEM) approximation, the energy flow density of this near-field can generate a local gravitomagnetic signal on the order of 10⁻⁷ s⁻¹, within the detection range of existing ring laser gyroscopes and atom interferometers.”