Mukapanga mabwalo othamanga kwambiri a PCB, kufananitsa kwa impedance ndi chimodzi mwazinthu zomwe zimapangidwira.Mtengo wa impedance uli ndi ubale weniweni ndi njira yolumikizira, monga kuyenda pamtunda (microstrip) kapena wosanjikiza wamkati (stripline/double stripline), mtunda kuchokera pagawo lolozera (mphamvu wosanjikiza kapena wosanjikiza pansi), m'lifupi mwa waya, zinthu za PCB. , ndi zina zotere. Zonse zidzakhudza mtengo wolepheretsa kutsata.

Ndiko kuti, mtengo wa impedance ukhoza kutsimikiziridwa pambuyo pa waya.Nthawi zambiri, mapulogalamu oyerekeza sangaganizire zina zama waya zomwe zimakhala ndi vuto losiya chifukwa cha kuchepa kwa mtundu wadera kapena masamu omwe amagwiritsidwa ntchito.Panthawiyi, zoletsa zina zokha (kuthetsa), monga kukana mndandanda, zikhoza kusungidwa pazithunzi za schematic.Chepetsani zotsatira za discontinuity mu trace impedance.Yankho lenileni la vutoli ndi kuyesa kupewa impedance discontinuities pamene mawaya.