Ho tloha Moralong ho ea ho Tshebetso: Mokhoa oa ho Thibela Likotsi tsa Boleng ho Tlhahiso ea PCB e Phahameng

Tlhahisong ea PCB e sebelisoang khafetsa, mohato oa moralo e sebetsa e le lejwe la motheo la boleng—jwalo ka ha motheo o kgetha matla a mohaho o motelele. Dikgetho tse mpe tsa moralo di ka lebisa ho kgopameng ha matshwao, tshitiso ya motlakase, le ditshitiso tsa tlhahiso. Baenjiniere ba meralo ea RF PCB, ho tseba taolo ea boleng mohatong oa moralo ho bohlokoa bakeng sa ho netefatsa ts'ebetso lits'ebetsong tse kang Liteishene tsa motheo tsa 5G, litsamaiso tsa sathelaetele puisano ea maqhubu a millimeter.

A re hlahlobeng kamoo liqeto tsa moralo tsa mohato oa pele li amang taolo ea impedance, tsela ea lipontšo, khetho ea thepa le botšepehi ba sebopeho—ha re ntse re senola lisosa tsa mantlha tsa mathata a boleng.

Moralo oa Lera la Matšoao: Ho Tšoantša Impedance le Topology ea Routing

1. Moralo oa Thibelo ea ho Sebetsa ka ho Nepahala1.

Lipotolohong tse nang le maqhubu a phahameng, impedance e ikhethang e tlameha ho lumellana hantle le lipheo tsa moralo (hangata 50Ω kapa 75Ω, ka mamello ea ±5%) ho qoba ponahatso ea lets'oao le ho senyeha. Ho se tshwane ha pherekano ho tshwana le maqhubu a modumo a tlolang maboteng a thata—dipontsho di sotha letshwao mme di lebisa ho eketseheng sekhahla sa liphoso tsa bit 'me ea fokotseha phallo ea data.

Ho fihlella botsitso ba impedance ho hloka:

• Lipalo tse nepahetseng tsa bophara ba motsamao le sebaka
• E nepahetseng botenya ba dielectric taolo
• Setaleng kamehla ea dielectric (Dk) thepa (mohlala, li-laminate tsa Rogers)

Mohlala, Rogers RO4350B, e nang le kh'amera e tsitsitseng le factor e tlase ea ho qhala (Df), e sebelisoa haholo ho li-PCB tsa 5G le mmWave ho netefatsa phetiso ea lets'oao la tahlehelo e tlase.

2. Topology e ntlafalitsoeng ea ho tsamaisa litsela

Sebopeho sa mohlala se tšoana le moralo oa litoropo bakeng sa sephethephethe sa matšoao. Sebopeho se fosahetseng—mehlala e melelele haholo, e moqotetsane, kapa e petetsaneng—se hlahisa letšoao tahlehelo, tiehokapa phetoloHo tsamaisa lintho ka bongata ho boetse ho eketsa kotsi ea puisano e akaretsang, haholo-holo pakeng tsa matshwao a lebelo le phahameng a bapileng.

Litekanyetso tsa indasteri ：

• E LATELANG (Sebapali sa ho Otlolla Molumo se Haufi)
• FEXT (Moqoqo o Felletseng)

Ho fokotsa tšitiso:

• Nyollelo sebaka se pakeng tsa mesaletsa
• Kenya mekhahlelo ea tšireletso ea fatše
• Sebelisa topology ea naleli kapa ea daisy-chain ho latela phallo ea lets'oao

Maano ana a ho rala a fokotsa EMI, a boloka botšepehi ba lets'oao, le ho ntlafatsa ts'epo ea potoloho ea maqhubu a phahameng.

Khetho ea Thepa le Ntlafatso ea Stack-Up

1. Ho bapisa Substrate bakeng sa Tshebetso e Phahameng ya Maqhubu1.

Ho khetha se nepahetseng thepa ea laminate ho bohlokoa haholo ho laoleng phokotso ya lets'oao. Bakeng sa ditshebediso tsa mmWave (mohlala, 24GHz–52GHz), thepa e nang le Df e tlase etsa bonnete ba hore phetiso ea motlakase e lahleheloa haholo.

Mohlala:
Rogers RO4350B e fumana tahlehelo ea phetisetso e tlase ho fihlela ho 0.5–1 dB ka intshi, e fihlela maemo a tiileng a puisano a mmWave.

Bohlokoa bo lekanang ke Botsitso ba Dr—ho feto-fetoha ha maemo ho ama ho thibela le ho fokotsa tshebetso ya letshwao. Baenjiniere ba meralo ba tlameha ho kgetha thepa e nang le Dkt e ka boleloang esale pele boleng tlas'a maemo a fapaneng a mocheso le mongobo.

2. Boenjiniere ba Stack-Up

Ho bokellana ha lera ho susumetsa botšepehi ba lets'oao le ho tsamaellana ha motlakase ka motlakase (EMC). Li-stack-up tse entsoeng hantle li ka:

• Fokotsa tieho ea lets'oao
• Fokotsa puisano e akaretsang
• Ntlafatsa tšireletso le EMC

Mekhoa e metle ka ho fetisisa:

• Sebaka matla le mealo ea fatše e haufi bakeng sa tšireletso e ntle ka ho fetisisa
• Boemo mekhahlelo ea matšoao ho fokotsa litsela tsa phetisetso
• Hloekisa sebaka se tsitsitseng sa lera bakeng sa botsitso ba impedance

Moralo o mobe oa ho bokellana ha lintho—mohlala, sebaka se seholo pakeng tsa lets'oao le fatše—se ka lebisa ho tieho e eketsehileng, lerata la mahlaselile Mathata a EMI.

Mefokolo e Tloaelehileng: Lisosa, Matšoao le Lekhalo la Tshebetso

1. Mathata a Tshebetso ea Motlakase

Matšoao:

• Ho fokotsa lets'oao
• Ho sotha sebopeho sa maqhubu ho li-oscilloscope
• Crosstalk e bakang tahlehelo ea data kapa ho hloleha ha sesebelisoa

Lisosa tsa Motheo:

• Taolo e fosahetseng ea impedance
• Tsela e sa lokelang ho tsamaisoa
• Khetho e sa lokelang ea thepa
• Ho se leka-lekane ha ho betla kapa botenya ba dielectric

Sekheo sa Tshebetso:
Li-PCB tse entsoeng hantle lia bontšoa maqhubu a hloekileng, a tsitsitseng le phetiso ea data e potlakileng haholoTse sa rereloang hantle li ka baka ba tlohelang puisano, tšitiso ea marang-rangkapa ho senyeha ha lets'oao, haholo-holo lits'ebetsong tse bonolo joalo ka liteishene tsa motheo tsa 5G.

2. Liphoso tsa Sebopeho

Matšoao:

• Litekanyo tsa boto tse sa mamelleng
• Ho sotha kapa ho inama
• Boholo ba masoba bo sa tsamaellaneng hantle kapa bo sa tsitsang

Lisosa tsa Motheo:

• Moralo o sa tsamaellaneng oa botenya ba lera
• Ho hloleha ho ikarabella bakeng sa mamello ea mechini ea lisebelisoa tsa tlhahiso
• Ho hlokomoloha katoloso ea mocheso le ho roala ha drile

Sekheo sa Tshebetso:
Mapolanka a tšepahalang a kopana hantle le likarolo le matlo. Mapolanka a nang le sekoli aa eketseha ho hloleha ha kopano, lipotoloho tse bulehilengkapa mesaletsa e robehileng, e leng se lebisang ho ntlafatsong e turang le ho fokotseng tshepahalo ya sistimi.

Thabo e Felletseng e Tletseng: Boleng ba Boenjiniere ho tloha Moralong ho ea ho TlhahisoThabo e Felletseng e Tletseng e Tletseng：

Ho Thabo e Felletseng e Ruileng, rea lumela PCB e nang le maqhubu a phahamengboleng ba ho qala nako e telele pele ho tlhahiso—ka boenjiniere bo matla mohloling oa meralo. Sehlopha sa rona se tlisa: ho Thabo e Felletseng e Ruileng ，

• Botsebi ho mohlala oa impedance le moralo oa ho bokella lintho tse ngata
• Tsebo ea litšobotsi tsa thepa bakeng sa lits'ebetso tsa RF le microwave
• Matla tšebelisano-'moho lipakeng tsa lihlopha tsa meralo le tlhahiso

Re thusa bareki ho felisa likotsi tsa boleng boemong ba moralo, re netefatsa hore lihlahisoa tsa hau li hahiloe bakeng sa lebelo, ts'epo le tlholisano ea lefats'e.