Uburyo bwo kugenzura impedance muri PCB zoroshye

Muri iyi nyandiko ya blog, tuzacengera mwisi ya PCB yoroheje kandi dushakishe uburyo butandukanye bwakoreshejwe kugirango tumenye neza uburyo bwo kugenzura inzitizi.

kumenyekanisha:

Kugenzura Impedance nikintu gikomeye cyo gushushanya no gukora imbaho ​​zicapye zoroshye (Flex PCBs). Mugihe izo mbaho ​​zigenda zamamara mu nganda nyinshi, biba ngombwa kumva uburyo butandukanye bwo kugenzura inzitizi ziboneka.

PCB ihindagurika ni iki?

PCB ihindagurika, izwi kandi nk'ibikoresho byoroheje byacapwe cyangwa ibikoresho bya elegitoroniki byoroshye, bivuga uruziga rwa elegitoronike ruto, rworoshye kandi rworoshye. Bitandukanye na PCBs zikomeye, zikorwa hakoreshejwe ibikoresho bikomeye nka fiberglass, PCB yoroheje ikorwa hifashishijwe ibikoresho byoroshye nka polyimide. Ihindagurika ribafasha kunama, kugoreka no guhuza kugirango bahuze imiterere cyangwa imiterere.

Kuki kugenzura impedance ari ngombwa muri PCB zoroshye?

Igenzura ryingirakamaro ni ingenzi muri PCB zoroshye kuko zitanga ibimenyetso byerekana ubuziranenge, bigabanya gutakaza ibimenyetso, kandi bitezimbere imikorere rusange. Nkuko icyifuzo cyibisabwa cyane nka terefone zigendanwa, tableti, imyenda ishobora kwambara, hamwe na elegitoroniki yimodoka ikomeje kwiyongera, gukomeza kugenzura inzitizi biba ngombwa cyane.

Uburyo bwo kugenzura impedance ya PCB yoroheje:

1. Inzira ya geometrie:
Inzira ya geometrie igira uruhare runini mugucunga inzitizi. Impedance irashobora guhuzwa neza muguhindura ubugari bwumurongo, intera nuburemere bwumuringa. Kubara neza no kwigana bifasha kugera kubiciro byifuzwa.

2. Kugenzura ibikoresho bya dielectric:
Guhitamo ibikoresho bya dielectric bigira ingaruka zikomeye kugenzura inzitizi. PCBs yihuta cyane yihuta ikoresha ibikoresho bike-dielectric-ihoraho kugirango igabanye umuvuduko wo gukwirakwiza ibimenyetso kugirango igere ku mbogamizi igenzurwa.

3. Ibishushanyo bya Microstrip na stripline:
Microstrip na stripline iboneza bikoreshwa cyane mugucunga inzitizi za PCB zoroshye. Microstrip bivuga iboneza aho ibimenyetso byayobora bishyirwa hejuru yububiko bwibikoresho bya dielectric, mugihe umurongo urimo imirongo ya sandwiching yerekana imiyoboro ibiri ya dielectric. Ibishushanyo byombi bitanga ibimenyetso biranga impedance biranga.

4. Ubushobozi bwashyizwemo:
Imashini zashyizwemo nazo zikoreshwa mugutanga ubushobozi buhanitse mugihe ugenzura impedance. Gukoresha ibikoresho byashizwemo nka firime bifasha kugumana uburinganire muri PCB yoroheje.

5. Gutandukana gutandukanye:
Ibimenyetso bitandukanye bikunze gukoreshwa mubitumanaho byihuse kandi bisaba kugenzura neza impedance. Muguhuza neza ibimenyetso bitandukanye no gukomeza umwanya uhoraho, impedance irashobora kugenzurwa cyane, kugabanya ibimenyetso byerekana ibimenyetso.

6. Uburyo bw'ikizamini:
Igenzura ryihutirwa risaba igeragezwa rikomeye no kugenzura kugirango hubahirizwe ibishushanyo mbonera. Tekinoroji nka TDR (Time Domain Reflectometry) hamwe nabapima impedance bikoreshwa mugupima no kugenzura indangagaciro zibangamira imirongo itandukanye.

mu gusoza:

Kugenzura Impedance nikintu cyingenzi mugushushanya PCB zoroshye kugirango zihuze ibikenewe bya elegitoroniki igezweho. Ba injeniyeri barashobora kugera kubintu byiza byo kugenzura bakoresheje geometrike ikwiye, ibikoresho bya dielectric bigenzurwa, iboneza ryihariye nka microstrip na stripline, hamwe nubuhanga nka capacitance yashyizwemo no guhuza itandukaniro. Kwipimisha neza no kwemeza bigira uruhare runini mukwemeza impedance neza no gukora. Mugusobanukirwa ubu buryo bwo kugenzura inzitizi, abashushanya n'ababikora barashobora gutanga PCBs yizewe kandi ikora neza cyane yinganda zitandukanye.