This　study　investigates　the　coupling　and　amplification　characteristics　of　Rogowski　coils　for　arc　high-frequency　signals　based　on　magnetic-coupling　resonance　principles.　First,　a　high-frequency　distributed　parameter　model　of　the　Rogowski　coil　is　established　with　its　transfer　function　derived,　while　analyzing　the　influence　of　key　parameters　(sampling　resistor,　coil　turns,　etc.)　on　sensor　performance.　A　bandwidth　test　platform　is　constructed　to　measure　the　output　characteristics　of　four　sets　of　Rogowski　coil　sensors.　In　fault　tests　with　four　typical　load　types,　the　Rogowski　coil　not　only　effectively　filters　out　low-frequency　current　signals　but　also　couples　and　amplifies　characteristic　frequency-band　signals　of　fault　arc　currents,　providing　a　new　technical　pathway　for　arc　fault　protection.　©　2025　SPIE.