Ithute ka botebo Moralo oa RF PCB: Ho tloha Linthong tsa Motheo ho ea ho Mekhoa e Mecha ea ho Iqapela
Jwalo ka sehlopha sa profeshenale se tsepamisitseng maikutlo ka botebo moralong wa PCB, Thabo e Felletseng e Ruilenge ikemiselitse ho fana ka theknoloji le litharollo tsa maemo a holimo bakeng sa indasteri. Sehloohong sena, re fana ka tlhahlobo e felletseng ea Moralo oa RF PCB, ho arolelana phihlelo ea rona e pharaletseng le temohisiso mabapi le mekhoa e tsoetseng pele bakeng sa baenjiniere ba PCB.
1. Ho Utloisisa Litšobotsi tsa Potoloho ea RF le Lipakane tsa Moralo
(1) Litšobotsi tsa Potoloho ea RF
Disekete tsa RF di sebetsa dibakeng tse nang le maqhubu a phahameng, e leng se etsang hore dibopeho tsa tsona tsa phetiso ya matshwao di rarahane haholo ho feta disekete tsa setso. Disebediswa tse tlwaelehileng tsa ketsiso jwalo ka LINOKOho thatafalloa ho sekaseka lipotoloho tsa RF ka nepo ka lebaka la mabaka a kang maqhubu a makhutšoane a maqhubu, litlamorao tsa mola oa phetisetso, lipontšo, li-refraction, le ho kopanya.
E tsoetseng pele Software ea EDA, joalo ka ADS (Sistimi e tswetseng pele ya Moralo) le HFSS (Sebapali sa Sebopeho sa Maqhubu a Phahameng), sebelisa li-algorithms tse rarahaneng joalo ka ho leka-lekana ha harmonic le mekhoa ea ho bolela esale peleho etsisa dipotoloho tsa RF ka ho nepahala ho hoholo. Pele o sebedisa disebediswa tsena, ho utlwisisa dibopeho tsa bohlokwa tsa potoloho ya RF ho bohlokwa.
Mohlala:
●Tšusumetso ea letlalo:Maqhubung a phahameng, motlakase o atisa ho phalla holim'a conductor, o eketsa khanyetso le ho ama boleng ba phetiso ea lets'oao.
● Phetisetso ea mohala oa phetisetso:Sena se susumetsoa ke maqhubu a lets'oao, bolelele ba mohlala, le thepa ea dielectric, e amang ka ho toba pontsho ya letshwao le bokgoni ba phetiso.
(2) Lipakane tsa Moralo oa RF PCB
1. Lipakane tsa Moralo oa Phetisetso
Moralo oa transmitter o lokela ho leka-lekana bokgoni ba motlakase le botšepehi ba lets'oao:
●Ho fokotsa tšebeliso ea motlakaseha ho ntse ho hlokahala ho netefatsa hore motlakase o lekaneng oa phetisetso, haholo-holo bakeng sa lisebelisoa tse tšoaroang ka letsoho le puisano ea sathelaete.
●Mofetoleli o tlameha ho u se ke ua kena-kenanaka dikanale tse haufi. Di-amplifier tsa motlakase di lokela ho laolwa ka nepo bakeng sa matla a tlhahiso le ho lekanaho thibela ho sotha ha lets'oao le tšitiso ea kanale e haufi.
2. Lipakane tsa Moralo oa Moamoheli
Moralo oa moamoheli o tlameha ho fihlela lipheo tse tharo tsa bohlokoa:
●Kutloisiso e phahameng:Moamoheli o lokela ho fumana matshwao a fokolang a ho kenya ka nepo, hangata a le tlase ho 1µVTaolo ea lerata e bohlokoa haholo, e hloka li-amplifier tsa lerata le tlase (LNAs) le meralo e ntlafalitsoeng ea potoloho.
●Ho hana ho kena-kenana ka katleho:Li-filter le ntlafatso ea potoloho li sebelisoa ho felisa matšoao a kantle ho sehlopha libakeng tse rarahaneng tsa motlakase.
●Tšebeliso e tlase ea matla:Sena se bohlokoa ho fihlela litlhoko tse akaretsang tsa tšebeliso e ntle ea matla litsamaisong tsa RF.
2. Dintlha tsa Bohlokoa tsa Moralo oa RF PCB
(1) Khetho ea Lisebelisoa
Ho khetha se nepahetseng thepa ea substrateke habohlokoa bakeng sa Potoloho ea RFtshebetso. Dintlha tsa bohlokwa di kenyeletsa:
1. Dielectric Constant (Dk):
●Litlamorao impedance le lebelo la ho phatlalatsoa ha lets'oao.
●Ho tsitsa ho bohlokoa—mefuta e menyenyane ea Dr e ka lebisa ho ho se lumellane ha impedance, e leng se bakang ponahatso le ho fokotseha ha lets'oao.
●Mohlala: Rogers RO4350Be fana ka ts'ebetso e tsitsitseng ea maqhubu a phahameng, e leng se etsang hore e be ntle bakeng sa Liteishene tsa motheo tsa 5G le puisano ea sathelaete.
2. Ntlha ea ho Qhala (Df):
●E etsa qeto tahlehelo ea matlanakong ea phetiso ea lets'oao.
●Lisebelisoa tse tlase tsa Df(mohlala, Li-substrate tse thehiloeng ho PTFE) fokotsa tahlehelo ea lets'oao, ho ntlafatsa bokhoni ba ho lisebelisoa tsa microwave.
3. Katoloso ea Thermal Coefficient (CTE):
●Litlamorao botsitso ba tekanyoho pholletsa le mocheso o fapaneng.
●Litekanyetso tsa CTE tse sa tsamaellaneng li ka baka mapetso a manonyeletso a solder le ho hloleha ha potoloholits'ebetsong tse kang lisebelisoa tsa elektroniki tsa lifofane le likoloi.
(2) Taolo ea ho se sireletsehe
Ho bapisa impedance ke karolo ea bohlokoa ea moralo oa RF PCB. Li-impedance tse tloaelehileng tsa mohala oa phetiso li kenyelletsa 50Ω le 75Ω, ka mamello e tiileng ea ±5% kapa esita le ±3%.
Taolo e nepahetseng ea impedance e hloka ho baloa ka hloko ha:
●Bophara le sebaka sa ho latela mohlala
●Botebo ba dielektri
●Botebo ba foil ea koporo
Ho latela IPC-2251, dibopeho tsa bohlokwa tsa phetiso ya RF di kenyeletsa mela ea microstrip, stripline, le li-waveguides tsa coplanarMohlala, mokhoa oa impedance oa microstripke:
Z0=87εr+1.41ln(5.98h0.8w+t)Z_0 = \frac{87}{\sqrt{\varepsilon_r + 1.41}} \ln\left(\frac{5.98h}{0.8w + t}\right)Z0=εr+1.4187ln(0.8w+t5.98h)
Hokae KA₀ke impedance e ikhethang, εrke phetoho ea dielectric, hke botenya ba substrate, Ka hareke bophara ba mohlala, le tke botenya ba koporo.
(3) Moralo oa ho Tsamaellana ha Elektromakenete (EMC)
1. Taolo ea Tšitiso ea Elektromakenete (EMI)
Mehloli e tloaelehileng ea EMI ho RF PCB e kenyelletsa:
● Likarolo tse sebetsang
●Melaetsa ea matšoao a lebelo le phahameng
●Mekhoa ea motlakase
Maano a atlehang a ho fokotsa EMI:
●Ntlafatso ea Sebopeho sa Sedikadikwe:Arohanya lipotoloho tse nang le matla a phahameng le tse nang le matla a tlaseho fokotsa tšitiso.
●Mekhoa ea ho Tiisa:Sebelisa ho thella ha ntlha e ngata, ntlha e le 'ngoe, kapa ho thella ha motsoakoho fana ka litsela tsa ho khutla tse nang le impedance e tlase.
●Mekhoa ea ho Sireletsa:Kenya tšebetsong lithako tsa tšireletso ea tšepeho thibela mesi e tswang motlakaseng.
2. Moralo oa ho Tšoenyeha ha Elektromakenete (EMS)
Ho ntlafatsa EMS ho netefatsa hore lipotoloho li hanela tšitiso ea kantle:
● Fokotsa sebaka sa sekgoqetsane sa letshwaoho fokotsa lerata le bakoang.
●Beha likarolo tsa sefe ka maano(li-capacitor, li-inductor) ho thibela matšoao a sa batleheng.
●Sebelisa li-capacitor tse arolanglipineng tsa motlakase ho tsitsisa phano ea motlakase le ho sefa lerata la maqhubu a phahameng.
3. Mokhoa oa Moralo oa RF PCB le Mekhoa e Metle
(1) Moralo oa Sekema
E hlophisitsoeng hantle moraloke motheo oa moralo oa RF PCB.
●Khetho ea likarolo:Khetha likarolo ho latela keketseho, palo ea lerata, le makhetlo a ho khaotsa.
●Tsamaiso ea liparamente tsa likokoana-hloko:Nahana kamoo bokhoni ba likokoana-hloko le ho kenella ha tsonaama tshebetso ya maqhubu a phahameng.
●Moralo o hlakileng, o utloahalang:Lokisetsa likarolo bakeng sa phallo e sebetsang hantle ea lets'oao le ho lokisa liphoso.
(2) Moralo oa Sebopeho sa PCB
1. Melao-motheo ea Sebopeho ka Kakaretso
●Lokisetsa dimmojule tse sebetsang di a kopanaho fokotsa tahlehelo ea lets'oao.
●Latela tatellano ea phallo ea lets'oao, boemo mekhahlelo ea ho feto-fetoha ha molumo, ho holisa le ho sefa ka mokhoa o utloahalang.
●Netefatsa ho qhala mocheso ho lekanengbakeng sa likarolo tse matla haholo tse sebelisang lisinki tsa mocheso kapa li-substrate tsa tšepe.
2. Mekhoa e Metle ea ho Beha Likarolo
●Hlahloba ka mosebetsi:Boloka Li-amplifiers tsa RF, li-capacitor, le li-inductorhammoho bakeng sa ho tsamaisa lintho habonolo.
●Fokotsa tšitiso:Arohanya likarolo tse matla a phahameng le tse matla a tlase.
●Ntlafatsa ho thella ha mobu:Sebelisa lifofane tse tiileng tsa fatšeho fokotsa lerata le ho se lumellane ha impedance.
Moralo oa RF PCB ke thuto e mahlakore a mangataho hloka taolo e nepahetseng holim'a thepa, impedance, EMC, le sebopehoKa ho latela mekhoa e metle le ho sebelisa mekhoa e tsoetseng pele lisebelisoa tsa ketsiso, baenjiniere ba ka rala li-PCB tsa RF tse sebetsang hantle tse fihlelang litlhoko tsa 5G, puisano ea sathelaete, le lits'ebetso tsa maqhubu a phahameng.
Batlana le ditharollo tsa RF PCB tsa setsebi? Thabo e Felletseng e Ruilengo teng ho thusa. Ikopanye le rona kajeno!
