Localizing　and　reconstructing　interference　sources　is　crucial　in　applications　such　as　electromagnetic　interference.　While　the　electromagnetic　time-reversal　(TR)　method　has　been　proposed　for　source　localization,　there　is　limited　experimental　validation　for　TR　source　reconstructions.　This　letter　presents　a　theoretical　analysis　and　experiments　that　validate　the　feasibility　of　TR　source　reconstruction　within　a　closed　metallic　cavity.　Wideband　signals　emitted　by　the　sources　are　measured　at　preselected　locations　in　the　frequency　domain　using　a　vector　network　analyzer.　These　measurements　are　then　converted　to　time-domain　signals　using　a　simple　algorithm　and　subsequently　time-reversed.　The　time-reversed　signals　are　injected　back　into　the　solution　domain,　and　backward　propagation　is　numerically　simulated　to　locate　sources,　incorporating　space　and　time　kurtoses.　The　results　confirm　the　effectiveness　of　the　TR　method,　validating　the　theoretical　analysis　and　providing　a　pathway　for　developing　a　realistic　hardware-based　TR　source　reconstruction　system.