The　complex　permeability　of　magnetic　materials　at　radio　frequencies　significantly　impacts　the　electromagnetic　compatibility　characteristics　of　magnetic　components.　The　precision　of　its　measurement　is　crucial　for　the　design,　selection,　and　study　of　electromagnetic　compatibility　properties　of　magnetic　components.　This　paper　discusses　the　key　material　parameters　affecting　the　radio　frequency　characteristics　of　magnetic　materials　and　provides　a　detailed　analysis　of　how　these　parameters　influence　the　complex　permeability　of　magnetic　materials.　It　reveals　why　traditional　methods　for　measuring　the　complex　permeability　of　magnetic　materials　are　not　applicable　at　high　frequencies.　The　paper　identifies　the　parasitic　inductance　and　capacitance　in　the　measurement　winding　as　the　primary　factors　affecting　measurement　accuracy.　Consequently,　it　proposes　a　new　method　for　testing　the　complex　permeability　of　magnetic　materials　in　the　radio　frequency　range,　considering　the　effects　of　parasitic　parameters　in　the　measurement　winding.　This　method　effectively　combines　small-signal　measurements　with　finite　element　simulation　to　calibrate　parasitic　parameters,　significantly　extending　the　frequency　range　of　the　measurement　results.　Experimental　findings　demonstrate　that　the　proposed　method　accurately　extracts　the　characteristic　parameters　of　magnetic　materials　in　the　frequency　range　of　30　MHz　to　1　GHz.　　©　2001-2012　IEEE.