Yini ithusi
Okubizwa ngokuthi ukuthululela kwethusi ukusebenzisa indawo engasetshenziswanga ebhodini lesifunda njengendawo yokubhekisela bese uyigcwalisa ngethusi eliqinile.Lezi zindawo zethusi zibizwa nangokuthi ukugcwaliswa kwethusi.
Ukubaluleka kwe-copper coating ukunciphisa i-impedance yocingo oluphansi nokuthuthukisa ikhono lokulwa nokuphazamiseka;ukunciphisa ukwehla kwamandla kagesi futhi kuthuthukise ukusebenza kahle kokunikezwa kwamandla;uma ixhunywe ocingweni lwaphansi, inganciphisa nendawo ye-loop.
Futhi ngenjongo yokwenza i-PCB ingakhubazeki ngangokunokwenzeka ngesikhathi sokudayiswa, abakhiqizi abaningi be-PCB bazophinde badinge abaklami be-PCB ukuthi bagcwalise indawo evulekile ye-PCB ngezintambo zomhlabathi zethusi noma ezinjengegridi.Uma ithusi lisingathwa ngendlela efanele, liyoba Uma inzuzo ingakufanelekeli ukulahlekelwa, ingabe ukumbozwa kwethusi “kunezinzuzo eziningi kunezimo ezimbi” noma “okubi kunezinzuzo”?
Wonke umuntu uyazi ukuthi ngaphansi kwezimo zemvamisa ephezulu, i-capacitance esabalalisiwe ye-wiring ebhodini lesifunda ephrintiwe izosebenza.Uma ubude bukhulu kuno-1/20 we-wavelength ehambisanayo yefrikhwensi yomsindo, umphumela we-antenna uzokwenzeka, futhi umsindo uzokhishwa ngezintambo.Uma kukhona ukuthululelwa kwethusi eliphansi kahle ku-PCB, ukuthululwa kwethusi kuba yithuluzi lokusabalalisa umsindo.
Ngakho-ke, kumjikelezo we-high-frequency, ungacabangi ukuthi ucingo oluphansi luxhunywe phansi endaweni ethile.Lona "intambo ephansi".Kufanele kube ngaphansi kuka-λ/20 ukubhoboza izimbobo kuzintambo.Indiza ephansi ye-laminate "umhlabathi omuhle".Uma ukugqoka kwethusi kusingathwa kahle, ukugqoka kwethusi akugcini nje ukwandisa okwamanje, kodwa futhi kudlala indima emibili yokuphazanyiswa kokuvikela.
Izinhlobo ezimbili ze-copper coating
Ngokuvamile kunezindlela ezimbili eziyisisekelo zokumboza ithusi, okuyi-copper yendawo enkulu kanye ne-grid yethusi.Kuvame ukubuzwa ukuthi ukugqoka kwethusi kwendawo enkulu kungcono kunegridi yethusi.Akulungile ukuhlanganisa yonke into.
ngani?Indawo enkulu yokumboza yethusi inemisebenzi emibili yokwandisa amandla amanje kanye nokuvikela.Kodwa-ke, uma i-copper yendawo enkulu isetshenziselwe ukuhlanganisa amagagasi, ibhodi lingase liphakamise ngisho namabhamuza.Ngakho-ke, ukuze kuhlanganiswe indawo yethusi enkulu, ama-grooves amaningana avame ukuvulwa ukuze kukhululwe i-blistering ye-foil yethusi.
Igridi ye-copper-clad ehlanzekile iyinhloko yokuvikela, futhi umphumela wokwandisa okwamanje uyancipha.Ngokombono wokukhipha ukushisa, igridi inhle (inciphisa indawo yokushisa yethusi) futhi idlala indima ethile yokuvikela i-electromagnetic.
Lapho imvamisa yokusebenza ingephezulu kakhulu, mhlawumbe umphumela wemigqa yegridi awubonakali kakhulu.Uma ubude bukagesi bufana nemvamisa yokusebenza, kubi kakhulu.Uzothola ukuthi isekethe ayisebenzi kahle nhlobo, futhi uhlelo lukhipha ukuphazamiseka yonke indawo.isignali ye.
Isiphakamiso ukukhetha ngokuvumelana nesimo sokusebenza sebhodi lesifunda eliklanyelwe, ungabambeli entweni eyodwa.Ngakho-ke, ama-circuits e-high-frequency anezidingo eziphakeme zamagridi ezinhloso eziningi ngokumelene nokuphazamiseka, futhi ama-circuits aphansi aneziyingi ezinemisinga emikhulu, njengethusi eliphelele elivame ukusetshenziswa.