Yintoni ubhedu
Okubizwa ngokuba kuthululwe ubhedu kukusebenzisa indawo engasetyenziswanga kwibhodi yesiphaluka njengendawo yokubhekisela 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 ibe yinto engenakukhubazeka kangangoko kunokwenzeka ngexesha le-soldering, abaninzi abavelisi be-PCB baya kufuna ukuba abaqulunqi be-PCB bazalise indawo evulekileyo ye-PCB ngobhedu okanye i-grid efana neengcingo zomhlaba.Ukuba ubhedu aluphathwanga ngokufanelekileyo, luya kuthi Ukuba inzuzo ayifanelanga ilahleko, ngaba ukugquma ubhedu "kunoncedo olungaphezulu kunelibi" okanye "izinto ezingeloncedo ngaphezulu kweenzuzo"?
Wonke umntu uyazi ukuba phantsi kweemeko eziphezulu ze-frequency, i-capacitance yokusabalalisa i-wiring kwibhodi yesekethe 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, musa ukucinga ukuba ucingo lomhlaba ludibaniswe nomhlaba kwindawo ethile.Olu “lucingo olusemhlabeni”.Kufuneka ibe ngaphantsi kwe λ/20 ukugqobhoza imingxuma kwiingcingo.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
Ngokuqhelekileyo kukho iindlela ezimbini ezisisiseko zokugquma ubhedu, ezizezi, indawo enkulu yokugquma ubhedu kunye nobhedu lwegridi.Kuhlala kubuzwa ukuba ingaba indawo enkulu yobhedu ingcono kunegridi yobhedu.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.
Igridi ecocekileyo ye-copper-clad iyinhloko yokukhusela, kwaye umphumo wokunyusa okwangoku uyancipha.Ukususela kumbono wokutshatyalaliswa kobushushu, igridi ilungile (inciphisa indawo yokufudumala yobhedu) kwaye idlala indima ethile yokukhusela i-electromagnetic.
Xa i-frequency yokusebenza ingekho phezulu kakhulu, mhlawumbi umphumo wemigca yegridi ayibonakali kakhulu.Emva kokuba ubude bombane buhambelana ne-frequency yokusebenza, kubi kakhulu.Uya kufumanisa ukuba isekethe ayisebenzi kakuhle kwaphela, kwaye inkqubo ikhupha ukuphazamiseka kuyo yonke indawo.uphawu lwe.
Isiphakamiso kukuba ukhethe ngokwemeko yokusebenza yebhodi yesekethe eyenzelwe, ungabambeli kwinto enye.Ngako oko, iisekethe eziphezulu ze-frequency zineemfuno eziphezulu kwiigridi zeenjongo ezininzi ngokuchasene nokuphazamiseka, kunye neesekethe eziphantsi kwee-frequency circuits zineengqungquthela ezinkulu, ezifana ne-copper epheleleyo esetyenziswa ngokuqhelekileyo.