I-High Frequency PCB Communication Circuit Design kanye Nokukhiqiza

Isingeniso

Ngokukhuphuka kwamanethiwekhi e-5G, ukuxhumana ngesathelayithi, i-IoT, nezinhlelo ze-radar, ama-PCB ahamba phambili (Amabhodi Esifunda Aphrintiwe) abaluleke kakhulu ekusekeleni ukudluliswa kwedatha ngesivinini esikhulu. Lawa masekethi ngokuvamile asebenza kumafrikhwensi angaphezu kuka-1 GHz, namasekhethi angama-millimeter-wave afinyelela ku-30 ​​GHz noma ngaphezulu. Kodwa-ke, amafrikhwensi aphezulu kangaka angenisa izinselele ezintsha zobuchwepheshe ezihlobene nobuqotho besignali, ukulahlekelwa kwezinto ezibonakalayo, ukuphazanyiswa kwe-electromagnetic (EMI), kanye nokunemba kokukhiqiza.

Lesi sihloko sihlinzeka ngokubheka okuphelele, okujulile emigomeni yezobuchwepheshe kanye nezidingo zedizayini zamasekhethi zokuxhumana anemvamisa ephezulu kuma-PCB. Iphinde ihlole izinhlelo zokusebenza ezibalulekile, izinselele ekukhiqizeni, namathrendi asafufusa ukuze ihambisane nobuchwepheshe obuguqukayo.

Imiqondo Eyinhloko Yeziyingi Zokuxhumana Ezivamile

Ukucatshangelwa Kwemvamisa Yokusebenza kanye Nomkhawulokudonsa

Amasekhethi anemvamisa ephezulu asebenza ezifundeni lapho amandla e-parasitic, umphumela wesikhumba, ukulahleka kwe-dielectric, kanye nokuphazamiseka kazibuthe kagesi kuthinta kakhulu ukusebenza. Amafrikhwensi asetshenziswa ngokuvamile:

• Izifunda ze-RF: 1 MHz ukuya ku-1 GHz
• Ama-circuits we-microwave: 1 GHz ukuya ku-30 GHz
• Ama-millimeter-wave circuits: 30 GHz ukuya ku-300 GHz

Kulezi zikhathi zokushintshashintsha, ubude bamaza buyancipha, okwenza ukwakheka kwe-PCB kanye nomklamo womugqa wokudlulisa kubaluleke kakhulu ekusebenzeni. Ukuphathwa ngokucophelela kokuzindla, ukubambezeleka kwesigaba, kanye nokungaqhubeki kwe-impedance kuba yinto ebalulekile ukuqinisekisa ubuqotho besiginali.

Izinto zokusebenzisa ama-PCB Amazinga Aphezulu

Ukukhethwa kwezinto ezikuma-PCB anemvamisa ephezulu kungenye yezinto ezibaluleke kakhulu ekunqumeni ukusebenza kwesignali, ukulahlekelwa, nokuzinza kuzo zonke izimo zemvelo nezokusebenza ezihlukahlukene. Njengoba ama-frequency enyuka ngaphezu kwe-GHz embalwa, izinto ezivamile ze-FR-4 azinele ngenxa yokulahlekelwa okuphezulu kwe-dielectric, imikhawulo yokushisa, nokungahambisani ne-dielectric constant (Dk). Ukuze kuhlangatshezwane nezidingo zamasekhethi anemvamisa ephezulu, onjiniyela kufanele bakhethe izinto ezithuthukisiwe ze-substrate ezine-low dielectric constant (Dk), i-low loss tangent (Df), nokusebenza okuzinzile kuyo yonke i-spectrum yokusebenza.

Ngezansi ukuhlolwa okunemininingwane yezinto ezisetshenziswayo ezifaneleka kakhulu zohlelo lokusebenza lwemvamisa ephezulu kanye namandla azo, izinselele, nezindawo zokusetshenziswa.

1. Ama-Common High-Frequency PCB Substrates

I-PTFE (Polytetrafluoroethylene, Teflon)

I-PTFE, eyaziwa nangokuthi i-Teflon, iwumsebenzi osetshenziswa kakhulu ezinhlelweni zemvamisa ephezulu ngenxa yokungaguquguquki kwayo kwe-dielectric ephansi kakhulu (i-Dk) engu-~2.1 kanye ne-tangent yokulahlekelwa (Df) ngaphansi kuka-0.002. Isebenza kahle kakhulu kumasekhethi asebenza ngaphezu kuka-10 GHz, okuyenza ifaneleke ukuxhumana nesathelayithi, amasistimu e-radar, amasekhethi e-RF, namadivayisi we-microwave. Izinzuzo zayo zihlanganisa ukuncishiswa kwesignali okuncane, okugcina amandla esignali kumabanga amade, nokumelana namakhemikhali aphezulu nokushisa, okuqinisekisa ukuqina ezindaweni ezinonya. Kodwa-ke, izakhiwo ze-PTFE ezinganamatheli zenza kube inselele ukucubungula nokunamathela kukhopha, okudinga amasu okucwenga akhethekile afana ne-plasma etching. Ukwengeza, iyabiza, inciphisa ukusetshenziswa kwayo emiklamo enganaki isabelomali.

i-laminate ekhethekile ephansi yokulahlekelwa okukhethekile (i-laminate ekhethekile ephansi yokulahlekelwa okukhethekile, i-hydrocarbon-ceramic low-loss laminates Series)

Ama-laminate e-laminate akhethekile aphansi okulahlekelwa angenye indlela ethandwayo yama-PCB anemvamisa ephezulu, anamanani e-Dk asukela ku-3.0 kuya ku-10.2 kanye ne-tangent yokulahlekelwa phakathi kuka-0.0018 no-0.0025. Lezi zinto zivame ukusetshenziswa ezinhlelweni ze-5G, ama-antenna, ama-amplifiers kagesi, kanye nama-microwave circuits. Inzuzo yazo eyinhloko i-Dk ehambisanayo ebangeni elibanzi lemvamisa, okusiza ukuvimbela ukuphambuka kwesigaba. Ama-laminate e-laminate aphansi okulahlekelwa okukhethekile nawo kulula ukuwacubungula kune-PTFE futhi ahambisana namasu okukhiqiza e-PCB ajwayelekile. Ngaphezu kwalokho, abonisa ukumuncwa komswakama okuphansi, okwenza afaneleke kakhulu ekusetshenzisweni kwangaphandle. Kodwa-ke, anezindleko eziphakeme kune-FR-4 kanye nama-laminate asekelwe ku-hydrocarbon futhi angadinga izixazululo ezengeziwe zokupholisa ekusetshenzisweni kwamandla aphezulu ngenxa yemikhawulo yokushisa kwezinye izichungechunge.

I-Ceramic-Filled Laminates

Ama-laminates agcwele i-Ceramic anikeza inhlanganisela eyingqayizivele yokuqina kwemishini ephezulu kanye ne-thermal conductivity enhle kakhulu, okuwenza alungele izinhlelo zokusebenza ze-RF ezinamandla aphezulu, i-radar yezimoto (isb., 77 GHz), nezinhlelo zokuxhumana ngesathelayithi. Lezi zinto ngokuvamile zinamanani a-Dk aphakathi kuka-6.0 no-10.0 kanye ne-tangent yokulahlekelwa engu-~0.002. Ukuzinza okuphakeme kwemishini kunciphisa ukulwa ngaphansi kwezimo ezishisayo ezishisayo, futhi izakhiwo ezizinzile ze-dielectric ziqinisekisa ukudluliswa kwesignali okunembile ngokuhamba kwesikhathi. Kodwa-ke, ama-laminates agcwele i-ceramic asindayo kunezinye izinto, okungase kube yimbuyiselo ezinhlelweni ezizwela isisindo, njengamasathelayithi. Zibuye zibize kakhulu futhi zinzima ukuzicubungula kunama-laminates asekelwe ku-hydrocarbon, okwandisa ngokwengeziwe ubunzima bokukhiqiza.

Ama-laminates asekelwe ku-Hydrocarbon

Ama-laminates asekelwe ku-hydrocarbon afinyelela ibhalansi phakathi kwezindleko nokusebenza, anikeza amanani ka-Dk aphakathi kuka-2.5 no-3.3 kanye ne-Df cishe ku-0.003. Lezi zinto zisetshenziswa ezinhlelweni zokuxhumana ze-microwave, amadivayisi we-IoT, amamojula we-RF, nengqalasizinda yeselula. Izinzuzo zabo ezibalulekile zihlanganisa ukulahlekelwa kwesignali okuphansi uma kuqhathaniswa ne-FR-4 nokucubungula okulula kune-PTFE, okubenza bafanelekele ukukhiqizwa kwenani elikhulu. Ngaphezu kwalokho, ahambisana namasu ajwayelekile okukhiqiza e-PCB, enza inqubo yokukhiqiza ibe lula. Kodwa-ke, ama-laminates asekelwe ku-hydrocarbon anikeza ukuzinza okushisayo okulinganiselwe kuphela, okunciphisa ukusetshenziswa kwawo ezindaweni ezinamandla noma ezisezingeni eliphezulu, ezidinga ukucatshangelwa kokuklama ngokucophelela kokuphathwa kokushisa.

2. I-Dielectric Constant (Dk) Ukuzinza kanye Nobuqotho Besiginali

I-dielectric constant (Dk) iyipharamitha ebalulekile yamasekhethi anemvamisa ephezulu ngoba ithinta ngqo isivinini sokusabalalisa isignali. U-D ophansi futhi ozinzile uqinisekisa ukuthi amasiginali ahamba kahle ngokubambezeleka okuncane, okunciphisa ithuba lokuhlanekezela kwesignali noma amaphutha esikhathi.

Umthelela ka-Dkt Ekusakazweni Kwesiginali

• Izinto ezisetshenziswayo zika-Dkt Higher zehlisa ukusakazeka kwesignali, okungangenisa ukubambezeleka ezinhlelweni zokuxhumana ezinesivinini esikhulu.
• Izinto ezisetshenziswayo ze-Dk eziphansi zinika amandla isignali esakazwa ngokushesha, ilungele amasekhethi anemvamisa ephezulu lapho isikhathi nokunemba kwesigaba kubalulekile.

Dk Uzinzo Kuwonka Amafrikhwensi

• Ezinye izinto ezisetshenziswayo zibonisa ukwehluka kuka-Dkt kubo bonke ububanzi befrikhwensi, okungaholela ekushintsheni kwesigaba nokuhlanekezeka kwe-waveform.
• Ama-laminate e-laminate akhethekile anezinga eliphansi lokulahlekelwa kanye nama-substrate agcwele i-ceramic ayaziwa ngezakhiwo zawo ezizinzile ze-Dk, okuqinisekisa ukusebenza okulinganayo kububanzi bemvamisa.
• U-Dkt ongazinzile angaholela ekutshekeni kwesignali kumadizayini ahambisanayo, njenge-PCIe, Ethernet, noma i-SerDes interface, lapho amasiginali amabili kufanele afike lapho aya khona ngokuvumelanisa.

I-Skew Yesiginali kanye Nezinkinga Zesikhathi Sesiginali Ehlukile

Emabhasini anesivinini esikhulu, njenge-USB 4.0, PCIe, noma i-100G Ethernet, amasignali adluliselwa njengamabhangqa ahlukene ukuze kuthuthukiswe ukungavikeleki komsindo. Kodwa-ke, uma izici ze-dielectric zihluka, isignali eyodwa ingase ihlangabezane nokulibaziseka okuhlukile kokusabalalisa kunenye, okuholela e-skew.

• Skew: Umehluko ezikhathini zokufika phakathi kwamasignali amabili wokupheya okuhlukile.
• Impact: I-Skew iholela kumaphutha amancane, ubuqotho bedatha eyehlisiwe, kanye nokukhuphuka kwe-jitter, okungabangela ukwehluleka kokuxhumana.
• Isixazululo: Sebenzisa okokusebenza okuno-D ongaguquki kanye ne-Df ephansi ukuze unciphise i-skew futhi uqinisekise ukuthi amasiginali womabili asakazeka ngesivinini esifanayo.

3. I-Loss Tangent (i-Df) kanye Nokuhlakazwa kwamandla

I-tangent yokulahlekelwa (i-Df), eyaziwa nangokuthi i-dissipation factor, ikala amandla alahleka njengokushisa lapho amasiginali edlula kokokusebenza kwe-dielectric. Kumasekhethi anemvamisa ephezulu, amanani e-Df aphansi abalulekile ukuze kuncishiswe ukuncishiswa kwesignali nokugcina amandla esignali kuzo zonke izindlela zokudlulisela ezinde.

• I-PTFE kanye nama-laminate e-laminate akhethekile anenani eliphansi kakhulu le-Df, okwenza afaneleke kakhulu kuma-microwave kanye nama-millimeter-wave frequency.
• Izinto ze-Df Ephakeme, njengamanye ama-substrates agcwele i-ceramic, zingaholela ekwandeni kokuchithwa kwamandla, okudinga amasu angcono okupholisa.

4. Ukuzinza Kokushisa kanye Nezakhiwo Zemishini

Amasekhethi anemvamisa ephezulu ngokuvamile asebenza ezindaweni ezinokuhlukahluka kwezinga lokushisa okubalulekile. Njengoba izinto zikhula futhi zinkontileka ngokushintsha kwezinga lokushisa, izakhiwo zazo ze-dielectric zingase zishintshe, kubangele izinkinga zokusebenza.

• I-PTFE kanye nama-laminates agcwele i-ceramic anikeza ukuzinza okuhle kakhulu kokushisa, ukugcina ukusebenza okungaguquki ngisho nasezimweni ezimbi kakhulu njengamasathelayithi noma izinhlelo ze-radar zezimoto.
• Ama-laminates asekelwe ku-Hydrocarbon ahlinzeka ngokuzinza okushisayo okumaphakathi kodwa angadinga izixazululo ezengeziwe zokupholisa ezinhlelweni zokusebenza zamandla aphezulu.

Isifinyezo Semihlahlandlela Yokukhetha Okubalulekile

Lapho kukhethwa izinto ezisetshenziswayo zama-PCB anemvamisa ephezulu, onjiniyela kufanele balinganisele izindleko, ukusebenza, ukwenziwa, kanye nezici zemvelo. Ngezansi ukuqhathanisa okusheshayo:

Izimiso Zokuklama zama-PCB Amazinga Aphezulu

Ukuklama ama-PCB anemvamisa ephezulu kudinga indlela eqinile yokuqinisekisa ubuqotho besignali nokusebenza kahle. Okucatshangelwayo okubalulekile kuhlanganisa ukukhethwa kwezinhlaka zolayini wokudlulisela, ukulawula okunembayo, ukuncishiswa okusebenzayo kwe-EMI, nokucabangela ngokuphatha. Lezi zakhi zisebenza ndawonye ukuze kugcinwe ukwethembeka kwesignali ezinhlelweni zokusebenza ezinesivinini esikhulu.

1. Izakhiwo Zolayini Wokudlulisa

Ukukhethwa kwezinhlaka zolayini wokudlulisa kubalulekile ekulawuleni ukuthintana nokunciphisa ukulahleka kwesignali.

• I-Microstrip Line: Lesi sakhiwo sibonisa umkhondo wesignali esendlalelo esiphezulu se-PCB, okubhekiselwa kundiza yaphansi ngaphansi. Ubulula bayo bukwenza kube lula ukuyisebenzisa; kodwa-ke, ukuchayeka kwayo emvelweni kuyenza ibe sengozini yokuphazanyiswa yi-electromagnetic interference (EMI), okungenzeka ibeke engcupheni ikhwalithi yesiginali ezindaweni ezinomsindo.
• I-Stripline: Kulo mklamo, ukulandelelwa kwesignali kushunyekwa phakathi kwezindiza ezimbili zaphansi ngaphakathi kwesitaki se-PCB. Lokhu kulungiselelwa kunikeza isivikelo esihle kakhulu se-EMI kanye ne-impedance elawulwayo, okwenza kube ukukhetha okukhethwa kukho kwezinhlelo zokusebenza ze-high-frequency. Noma kunjalo, inkimbinkimbi nezindleko zokukhiqiza imigqa ehlutshiwe ingaba nkulu, edinga ukuhlela ngokucophelela esigabeni sokuklama.
• I-Coplanar Waveguide (CPW): Lapha, umkhondo wesignali uzungezwe izindiza ezingaphansi kwesendlalelo esifanayo, okuvumela ukulawulwa okungcono kwe-impedance kanye ne-crosstalk encishisiwe. Ama-CPW asiza ukucindezelwa kwe-EMI ngempumelelo futhi asekele ukusebenza kwamafrikhwensi aphezulu, akwenze ukuthi afanelekele izinhlelo zokusebenza ze-RF ezithuthukisiwe.

2. Ukumatanisa Kokuphazamiseka Nokulawula

Ukufanisa okunembile kwe-impedance kubalulekile ekwakhiweni kwefrikhwensi ephezulu ukuvimbela ukubonakaliswa kwesignali okungahlehlisa ukusebenza. Amasignali emvamisa ephezulu azwela kakhulu ekungafaniseni kwe-impedance, okuholela ekulahlekelweni kokubuyisela futhi kungathinta kakhulu ubuqotho buphelele besignali.

Isici se-impedance Z0 solayini wokudlulisela singabalwa kusetshenziswa ifomula:

kuphi:

• I-Z0: Ukuphazamiseka kuma-ohms
• Dk: I-Dielectric constant of the material
• h: Ibanga ukusuka kumkhondo kuya endizeni yaphansi
• W: Ububanzi bomqhubi
• T: Ukujiya komqhubi

Ubuqotho Besiginali kanye Nokunciphisa kwe-EMI kuma-PCB Amazinga Aphezulu

Ukuqinisekisa ubuqotho besignali kanye nokunciphisa ukuphazamiseka kwe-electromagnetic (EMI) kubalulekile ekwakhiweni kwe-PCB yemvamisa ephezulu. Njengoba amafrikhwensi okusebenza akhula, izindlela zokwehlisa isignali kanye nokuphathwa kwe-EMI kuba nzima kakhulu. Ngezansi, sihlola izinselele zobuchwepheshe eziyinhloko namasu athuthukile okulondoloza ukwethembeka kwesignali nokucindezela i-EMI kumasekhethi anemvamisa ephezulu.

1. Izindlela Ezithuthukisiwe Zokulahleka Kwesiginali kanye Namasu Okunciphisa

Amasiginali wemvamisa ephezulu athambekele ezinhlotsheni eziningi zokulahleka, futhi ukubhekana nalokhu kudinga ukuqonda okujulile kwemiphumela eqhutshwa yi-physics kanye nokunciphisa kwayo:

I-Skin Effect kanye Nokulahleka Kwe-Conductor:

Emafrikhwensi aphezulu, ukujula kwesikhumba (ukujula okusebenzayo kokugeleza kwamanje) kuncipha, okuphoqa ukuthi i-current ihambe kuphela endaweni yomqhubi. Lokhu kwandisa ukumelana ne-AC futhi kunomthelela ekulahlekelweni kwe-conductor. Ukujula kwesikhumba δ kuphambene ngokuphambene nempande eyisikwele yemvamisa:

Ukunciphisa: Ukunciphisa ukulahleka kwe-conductor, abaklami bangakwazi ukunamathisela imikhondo ngesiliva noma igolide ukuze bathuthukise ukuhamba kahle. Ukusebenzisa imikhondo ebanzi noma izendlalelo zethusi ezijiyile kunganciphisa le miphumela.

Ukulahleka Kwe-Dielectric Nokukhethwa Kwezinto:

Ukulahleka kwe-Dielectric kuvela lapho ingxenye yamandla esignali imuncwa into ye-PCB futhi ishaywe njengokushisa. I-Loss tangent (Df) ilinganisa lokhu kulahlekelwa, futhi amaza okusebenza aphezulu akhulisa ukuhlakazeka.
Ukunciphisa: Sebenzisa izinto ezinenani eliphansi le-Df (isb., i-PTFE noma ama-laminate e-laminate akhethekile aphansi) ukuze unciphise ukulahleka. Emiklamo enamandla aphezulu, ama-laminate ahlanganisiwe (ahlanganisa ama-dielectric aphansi aphansi nama-substrate aqinile) angalinganisa izindleko kanye nokusebenza.

Ukulahleka Kwemisebe Nokuthuthukiswa Kwesakhiwo Se-PCB:

Ukulahleka kwemisebe kwenzeka lapho ulayini wokudlulisela uziphatha njengothi, ukhipha amandla ngokungenhloso endaweni ezungezile. Lo mphumela ugqama kakhulu kumafrikhwensi angaphezu kuka-10 GHz noma emigqeni yokudlulisela engavikelwe kahle.
Ukunciphisa: Ukuthuthukisa imiklamo kalayini wokudlulisela (isb, ama-stripline noma ama-waveguides e-coplanar) kunciphisa imisebe. Ukwengeza, ukugcina izikhala eziqinile zokulandela umkhondo kuya phansi kusiza ukuqukatha izinkambu ze-electromagnetic.

I-Crosstalk kanye ne-Parasitic Coupling:

Imiphumela ye-Crosstalk evela ekuxhumaneni kukagesi noma kazibuthe phakathi kwemigqa yesiginali eseduze. Njengoba isikhala sokulandelela sincipha futhi imvamisa inyuka, amandla e-parasitic kanye ne-inductance kuba okubaluleke kakhulu.
Ukunciphisa: Sebenzisa amapheya ahlukile kumasiginali wesivinini esikhulu ukuze unciphise umsindo wemodi evamile. Ukusebenzisa imikhondo yokuqapha ephansi phakathi kwemigqa yesignali ebalulekile futhi kunciphisa imiphumela yokuhlanganisa.

2. I-Precision EMI Izindlela Zokunciphisa Emiklamweni Evela Imvamisa Ephezulu

Ukuphatha okusebenzayo kokuphazanyiswa kwe-electromagnetic interference (EMI) kumiklamo ye-PCB yamafrikhwensi amaningi kudinga amasu athuthuke kakhulu kunezindlela eziyisisekelo zokuhlela. Njengoba ama-frequencies anda, ukusebenzisana kwensimu ye-EM, imiphumela ye-parasitic, nokuyeka indlela yokubuyisela kuba bucayi. Nazi izindlela ezimbalwa ezithuthukile zokulawula i-EMI ngempumelelo.

Ukulawulwa Okuhlukene Okubili Komzila kanye Nokuhlanganisa Okuqinile

Kumiklamo yefrikhwensi ephezulu, amapheya ahlukile asetshenziselwa ukunciphisa umsindo wemodi evamile, kodwa kufanele ahanjiswe ngesikhala esinembile nokuqondanisa ukuze kugcinwe ukuhlangana okufanele. Ukuhlanganisa okuqinile kunciphisa ukuguqulwa kwemodi ehlukile kuya kwevamile, kunciphisa ukukhishwa kwemisebe futhi kuthuthukisa ubuqotho besignali. Amathuluzi okulingisa afana ne-ANSYS HFSS kanye ne-HynxLynx asiza onjiniyela ukuhlela kahle umzila wokubhanqa ohlukile, oqinisekisa ukutsheka okuncane nokusebenza okungaguquki.

Ipharamitha engukhiye: Amapheya ahlukile ngokuvamile adizayinelwe i-impedance engu-100-ohm. Ukuchezuka kusuka kulelivelu kungabangela ukuboniswa, ukuguqulwa kwemodi, nezinkinga ze-EMI, kuthinte ikhwalithi yesiginali.

Izindiza Eziphansi kanye Nezindlela Zokubuya Eziphansi

Ukugcina izindiza zaphansi ezingaphazamiseki kuqinisekisa inkomba ethembekile yamasignali futhi kunciphisa i-EMI. Kodwa-ke, amasignali alandela indlela ye-inductance encane, futhi noma yiziphi izikhala ezindizeni ezisemhlabeni ziveza ukungaqhubeki, okubangela ukuwohloka kwesignali. Kuma-PCB anezingqimba eziningi, izindlela zokubuya ezingafanele zandisa i-EMI ngokudala amalophu afakayo.

Ukunciphisa: Sebenzisa ukuthunga nge-vias ukuxhuma izindiza zaphansi eziseduze kuzo zonke izendlalelo ezihlukene, uqinisekise izindlela zokubuya eziqhubekayo. Le nqubo ibalulekile lapho amasignali eshintsha phakathi kwezendlalelo ukuvimbela izinkinga ze-EMI nokugcina ubuqotho besignali.

Nge-Design and Stub Management

I-Vias iyadingeka ekuxhumekeni kwe-interlayer kodwa yethula i-parasitic inductance engakhipha i-EMI futhi ibangele ukubonakaliswa kwesignali kumafrikhwensi aphezulu. Okungasetshenzisiwe ngama-stubs kusebenza njengezimpondo, okunikela ku-EMI kanye nokusebenza okwehlisa isithunzi.

Ukunciphisa: Faka isicelo sokubhobolwa emuva ukuze ususe okungadingekile ngama-stubs, unciphisa imibukiso futhi ucindezele i-EMI. Kumasekhethi anemvamisa ephezulu, ama-vias angaboni futhi angcwatshwe anikeza ukulawula okungcono kwe-EMI. Ngokuthunga eduze kwemikhondo ebalulekile futhi kusiza ukuqukatha izinkambu ze-electromagnetic kanye nokuthuthukisa ubuqotho besignali.

I-Guard Traces kanye Nokufaniswa Kokuphazamiseka Kwe-EMI Suppression

Ukulandela umkhondo, noma imikhondo esekelwe phansi ebekwe phakathi kwamasignali anesivinini esikhulu, isebenza njengezivimbi ukuze kuncishiswe i-crosstalk futhi ivale i-EMI. Kodwa-ke, ukuqaliswa okungalungile kokulandelelwa konogada kungadala ukungafani kwe-impedance, okuholela ekulahlekelweni kwembuyiselo (S11) kanye nokonakala kwesignali.

Ukunciphisa: Sebenzisa amathuluzi okuhlaziya inkambu ye-EM ukuze uhlole umthelela wokulandela umkhondo wonogada futhi uqinisekise ukuthi awuphazamisi ukufanisa okufanayo. Uma kuklanywe kahle, ukulandela ngomkhondo kuthuthukisa ukucindezelwa kwe-EMI ngaphandle kokuthikameze kabi ukusebenza kwamasignali aseduze anesivinini esikhulu.

Ukubhekana nobuqotho besiginali kanye nezinselele ze-EMI kudinga ulwazi olujulile ngomklamo we-PCB ovame kakhulu. Kungakhathaliseki ukuthi ubhekene nokungafani kwe-impedance, izinkinga ze-layer stack-up, izinkinga ze-crosstalk, noma ze-EMI, silapha ukuzokusiza. Xhumana nathi namuhla ukuze uthole ukubonisana kochwepheshe kanye nezixazululo zokuthuthukisa imiklamo yakho ye-PCB ukuze isebenze kahle kakhulu.

Isiphetho

Amasekhethi okuxhumana e-PCB anemvamisa ephezulu awumgogodla wobuchwepheshe besimanje zokuxhumana. Ukuklama nokukhiqiza le mijikelezo kudinga ukunakwa ngokucophelela ekukhethweni kwezinto ezibonakalayo, ubuqotho besignali, ukulawulwa kwe-EMI, nokuphathwa kwe-thermal. Njengoba izinhlelo zokusebenza ezifana ne-5G, izimoto ezizimele, ne-IoT ziqhubeka nokukhula, isidingo sama-PCB athembekile, asebenza kahle kakhulu azokwanda kuphela. Ngokunqoba izinselelo ezihlobene nale miklamo, onjiniyela bangaqinisekisa ukuxhumana okuqinile, okuphumelelayo, nokushesha kakhulu kuzo zonke izimboni ezihlukahlukene.

Lokhu kuhlola ubuchwepheshe kugqamisa ukubaluleka komklamo oqondile kanye nezinto ezintsha kuma -PCB asebenza kakhulu , okusiza ukuhlangabezana nezidingo eziqinile zezinhlelo zokuxhumana zesizukulwane esilandelayo. Njengoba imboni ithuthuka, intuthuko eqhubekayo kubuchwepheshe be-PCB izovula amathuba amasha okuxhumana okungenantambo, iqinisekise ikusasa elixhunyiwe.

Xhumana nathi ukuze uthole Izisombululo ze-PCB Ezisebenza Kakhulu

Ingabe ubhekene nezinselele ngokufanisa i-impedance, ukulawulwa kwe-EMI, ubuqotho besignali, noma ukwakheka kwesitaki sesendlalelo? Ithimba lethu lochwepheshe likulungele ukukusiza ngezisombululo ze-PCB ezihambisana nemvamisa ephezulu. Xhumana nathi namuhla ukuze uthole ukubonisana nochwepheshe futhi sikuvumele sikusize uthuthukise imiklamo yakho ukuze uthole ukusebenza okuphezulu nokuthembeka ezinhlelweni zakho zokuxhumana.