Yintoni ukutyabeka kobhedu?

Okubizwa ngokuba kuthululwe ubhedu kukusebenzisa isithuba esingasetyenziswanga kwi PCB njengomphezulu wereferensi kwaye emva koko uyigcwalise ngobhedu oluqinileyo.Ezi ndawo zobhedu zikwabizwa ngokuba kukuzaliswa kobhedu.

Ukubaluleka kokugubungela ubhedu kukunciphisa ukunyanzeliswa kocingo lomhlaba kunye nokuphucula amandla okuthintela ukuphazamiseka;ukunciphisa ukuhla kwamandla ombane kunye nokuphucula ukusebenza kakuhle konikezelo lwamandla;ukuba idibaniswe nocingo oluphantsi, inokunciphisa indawo ye-loop.

Kwakhona ngenjongo yokwenza i-PCB ingakhubazeki kangangoko kunokwenzeka ngexesha le-soldering, abaninzi abavelisi be-PCB baya kufuna ukuba abaqulunqi be-PCB bagcwalise indawo evulekileyo ye-PCB ngobhedu okanye i-grid efana neengcingo zomhlaba.Ukuba ubhedu aluphathwanga ngokufanelekileyo, luya kuthi Ukuba inzuzo ayifanelanga ilahleko, ngaba ukugquma ubhedu "kungaphezu kweenzuzo" okanye "iingxaki ezingaphezu kweenzuzo"?

Wonke umntu uyazi ukuba kwimeko ye-frequency ephezulu, i-capacitance esasazwayo ye-wiring kwibhodi yesiphaluka eprintiweyo iya kusebenza.Xa ubude bungaphezulu kwe-1/20 ye-wavelength ehambelanayo yefrikhwensi yengxolo, umphumo we-antenna uya kwenzeka, kwaye ingxolo iya kukhutshwa nge-wiring.Ukuba kukho ukugalelwa kobhedu olusekelwe kakubi kwi-PCB, ukugalela ubhedu kuba sisixhobo sokusasaza ingxolo.

Ngoko ke, kwisekethe ye-high-frequency circuit, ungacingi ukuba ucingo lomhlaba ludibaniswe nomhlaba kwindawo ethile.I-plane yomhlaba ye-laminate "ngumhlaba omhle".Ukuba i-copper copper iphathwa ngokufanelekileyo, ukugubungela ubhedu akugcini nje ukwandisa okwangoku, kodwa kudlala indima emibini yokuphazamiseka kokukhusela.

Iifom ezimbini zokugquma ubhedu
Zimbini iindlela ezisisiseko zokugalela ubhedu, ezizezi, ukugalelwa kobhedu kwindawo enkulu kunye negridi yobhedu.Kusoloko kubuzwa ukuba ngaba ukugalelwa kobhedu kwindawo enkulu kungcono okanye ukugalela ubhedu kwigridi kungcono.Akulunganga ukwenza ngokubanzi.

Ngoba?Ingubo yobhedu yendawo enkulu inemisebenzi emibini yokunyusa yangoku kunye nokukhusela.Nangona kunjalo, ukuba isitya esikhulu sobhedu sisetyenziselwa ukuthengiswa kwamaza, ibhodi inokuphakamisa kunye namadyunguza.Ke ngoko, kwindawo enkulu yokugquma ubhedu, iigrooves ezininzi zihlala zivulwa ukukhulula i-blistering ye-foil yobhedu.Njengoko kubonisiwe ngezantsi:

Igridi ye-copper-clad isetyenziselwa ikakhulu ukukhusela, kwaye umphumo wokunyusa okwangoku uyancipha.Ukususela kumbono wokutshatyalaliswa kobushushu, igridi ilungile (inciphisa indawo yokufudumala yobhedu) kwaye idlala indima yokukhusela i-electromagnetic ukuya kwinqanaba elithile.Ngokukodwa kwiisekethe ezifana ne-touch, njengoko kubonisiwe kulo mfanekiso ungezantsi:

Kufuneka kucaciswe ukuba igridi yenziwe ngokulandelelana kwiindlela ezinqamlekileyo.Siyazi ukuba kwisekethe, ububanzi bomkhondo bune "ubude bombane" obuhambelanayo ngokuphindaphindiweyo kokusebenza kwebhodi yesekethe (ubungakanani bokwenene buhlulwe yi-Frequency yedijithali ehambelana nokusebenza rhoqo kuyafumaneka, jonga iincwadi ezinxulumene neenkcukacha. ).

Xa i-frequency yokusebenza ingekho phezulu kakhulu, mhlawumbi indima yomgca wegridi ayibonakali kakhulu.Emva kokuba ubude bombane buhambelana nokusebenza rhoqo, kubi kakhulu.Uya kufumanisa ukuba iPCB ayisebenzi kwaphela, kwaye inkqubo yokuphazamiseka isebenza kuyo yonke indawo.uphawu lwe.

Isiphakamiso kukuba ukhethe ngokwemeko yokusebenza yebhodi yesekethe eyenzelwe, ungabambeli kwinto enye.Ngako oko, i-high-frequency circuit inemfuno ephezulu yeegridi ezisetyenziselwa ukuchasana nokuphazamiseka, kwaye i-low-frequency circuit ine-circuit yangoku enkulu kunye nezinye ezisetyenziswa ngokuqhelekileyo ubhedu olupheleleyo.

# FR4 PCB umboneleli