Ngokuvamile, izici ezithinta isici se-PCB yizi: ukushuba kwe-dielectric H, ukujiya kwethusi T, ububanzi bokulandelela u-W, isikhala sokulandelela, i-dielectric engaguquki Er yezinto ezikhethelwe isitaki, kanye nogqinsi lwemaski ye-solder.

Ngokuvamile, ukushuba kwe-dielectric okukhulu nokuhlukaniswa kwemigqa, likhulu inani le-impedance; uma kukhulu ukungaguquguquki kwe-dielectric, ukujiya kwethusi, ububanzi bomugqa, nogqinsi lwemaski ye-solder, liba lincane inani le-impedance.

Eyokuqala: ukushuba okuphakathi, ukukhulisa ukushuba okuphakathi kungakhuphula i-impedance, futhi ukwehlisa ukushuba okuphakathi kunganciphisa i-impedance; ama-prepregs ahlukene anokuqukethwe kweglue okuhlukile nobukhulu. Ukuqina ngemva kokucindezela kuhlobene nokucaba komshini kanye nenqubo yepuleti lokucindezela; nganoma yiluphi uhlobo lwepuleti elisetshenzisiwe, kuyadingeka ukuthola ukushuba kongqimba lwemidiya olungakhiqizwa, oluhambisana nokuklama ukubala, kanye nomklamo wobunjiniyela, ukucindezela ukulawulwa kwepuleti, Ukubekezelelana okungenayo kuyisihluthulelo sokulawula ukushuba kwemidiya.

Okwesibili: ububanzi bomugqa, ukwandisa ububanzi bomugqa kunganciphisa i-impedance, ukunciphisa ububanzi bomugqa kungandisa i-impedance. Ukulawulwa kobubanzi bomugqa kudingeka kube ngaphakathi kokubekezelela okungu-+/- 10% ukuze kufinyelelwe ukulawula kokuvinjwa. Igebe lomugqa wesiginali lithinta lonke uhlobo lwegagasi lokuhlola. I-impedance yayo yephuzu elilodwa iphakeme, okwenza i-waveform yonke ingalingani, futhi umugqa we-impedance awuvunyelwe ukwenza Umugqa, igebe alikwazi ukudlula i-10%. Ububanzi bomugqa bulawulwa ngokuyinhloko ngokubhala kokulawula. Ukuze kuqinisekiswe ububanzi bomugqa, ngokwenani le-etching side etching, iphutha lomdwebo okhanyayo, kanye nephutha lokudlulisa iphethini, ifilimu yenqubo inxeshezelwa ngenqubo yokuhlangabezana nemfuneko yobubanzi bomugqa.

Okwesithathu: ukushuba zethusi, ukunciphisa ukushuba line kungandisa impedance, ukwandisa ukushuba line kunganciphisa impedance; ukushuba komugqa kungalawulwa ngokufakwa kwephethini noma ukukhetha ukushuba okuhambisanayo kwesisekelo se-copper foil. Ukulawulwa kokuqina kwethusi kuyadingeka ukuze kufane. I-shunt block yengezwa ebhodini lezintambo ezincanyana nezintambo ezihlukanisiwe ukuze kulinganiswe amandla amanje ukuvimbela ukujiya kwethusi okungalingani ocingweni futhi kuthinte ukusabalalisa okungalingani ngokwedlulele kwekhopha ezindaweni ezingaphansi kwe-cs ne-ss. Kudingekile ukuwela ibhodi ukuze kuzuzwe inhloso yokuqina kwethusi okufanayo ezinhlangothini zombili.

Okwesine: i-dielectric constant, ukwandisa i-dielectric constant kunganciphisa i-impedance, ukunciphisa i-dielectric constant kungakhuphula i-impedance, i-dielectric constant ilawulwa ngokuyinhloko yizinto ezibonakalayo. I-dielectric constant yamapuleti ahlukene ihlukile, ehlobene ne-resin material esetshenzisiwe: i-dielectric constant ye-FR4 plate yi-3.9-4.5, ezokwehla ngokunyuka kwemvamisa yokusetshenziswa, kanye ne-dielectric constant ye-PTFE plate ngu-2.2 - Ukuze uthole ukudluliswa kwesignali ephezulu phakathi kwe-3.9 kudinga inani eliphakeme le-impedance, elidinga i-dielectric njalo ephansi.

Okwesihlanu: ubukhulu bemaski ye-solder. Ukuphrinta imaski ye-solder kuzonciphisa ukumelana nongqimba lwangaphandle. Ngaphansi kwezimo ezijwayelekile, ukuphrinta imaski ye-solder eyodwa kunganciphisa ukwehla okuphethe okukodwa ngo-2 ohms, futhi kungenza umehluko wehle ngo-8 ohms. Ukuphrinta kabili inani lokwehla liphindwe kabili kunephasi elilodwa. Lapho uphrinta izikhathi ezingaphezu kwezintathu, inani le-impedance ngeke lishintshe.