Kodi A High-Speed PCB ndi chiyani?
Timatcha PCB yokhala ndi ma frequency transmission frequency pamwamba pa 1GHz kukhala bolodi yosindikizidwa yothamanga kwambiri.
Ubwino wogwiritsa ntchito ma PCB othamanga kwambiri ndi chiyani?
Kuwongolera ma frequency azizindikiro ndikuthana ndi vuto la EMI pazinthu zamagetsi, ma PCB othamanga kwambiri adapangidwa. Pambuyo pa mapangidwe a PCB othamanga kwambiri adapeza bwino kwambiri, zopereka zake ku EMI ndizofunika kwambiri. Pafupifupi 60% yamavuto a EMI amatha kuthetsedwa ndi ma PCB othamanga kwambiri.
Ndi zinthu ziti zomwe zimagwiritsidwa ntchito mu ma PCB othamanga kwambiri?
Zida zolimbana ndi kutentha, kulimba kwamakina, komanso zabwino (zodalirika)
Zida zokhala ndi magawo okhazikika a Dk / Df (magawo ang'onoang'ono osinthika ndi ma frequency ndi chilengedwe)
Zida zokhala ndi control impedance yabwino
Zipangizo ndi otsika roughness wa mkuwa zojambulazo pamwamba
Ndikoyenera kusankha nsalu ya fiber fiber yokhala ndi mipata yaying'ono.
Ndi malangizo ati omwe ndiyenera kuwaganizira popanga PCB yothamanga kwambiri?
Malangizo angapo pakupanga PCB yothamanga kwambiri akufotokozedwa pansipa.
1) Gwiritsani ntchito mapulogalamu apangidwe ndi zosankha zapamwamba
Mainjiniya ayenera kudziwa mapulogalamu opangira omwe angapereke zosankha zapamwamba. Zida zamapulogalamu zimafunikira zinthu zambiri zapamwamba kuti zitha kupanga ma PCB othamanga kwambiri mu mapulogalamu a CAD. Muyenera kumvetsetsa bwino zida zamphamvu za CAD.
2) Njira yothamanga kwambiri
Zikafika pamayendedwe othamanga kwambiri, okonza amafunika kumvetsetsa malamulo amayendedwe oyambira, kuphatikiza kusadula magawo apansi ndikuchepetsa njirayo. Chifukwa chake, chonde pewani kufalikira kwa mtunda wina pamizere ya digito ndikutchinjiriza zinthu zonse zomwe zingayambitse kusokoneza kukhulupirika kwa chizindikiro.
3) Njira yoyendetsera ndi impedance control
Pazizindikiro zina za 40-120 ohms, zimafunikira kufananiza kwa impedance. Kufananiza kofananirako kumawululidwa ndi tinyanga ndi mawiri awiri osiyana.
Okonza akuyenera kumvetsetsa momwe angawerengere kukula kwa njirayo ndi kuchuluka kofunikira kwa mtengo wa impedance. Ngati mtengo wa impedance suli wolondola, ukhoza kukhala ndi vuto lalikulu pa chizindikiro, zomwe zingayambitse kuwonongeka kwa deta.
4) Malonda okhala ndi kutalika kofanana
Pali mizere yambiri mumabasi othamanga kwambiri komanso mabasi olumikizirana. Mizere iyi imatha kugwira ntchito pama frequency apamwamba kwambiri, kotero chizindikirocho chiyenera kutumizidwa nthawi imodzi kuchokera kwa wotumiza kupita kwa wolandila. Kuphatikiza apo, pamafunika mbali yotchedwa kutalika kofananira. Choncho, miyezo yodziwika bwino imatanthawuza kulekerera komwe kumayenera kufanana ndi kutalika.
5) Chepetsani dera lomwe likubwereranso
High-liwiro okonza PCB ayenera kutsatira malamulo zofunika, monga kupanga mosalekeza wosanjikiza pansi ndi kuchepetsa dera la panopa kubwerera dera ndi kukhathamiritsa panopa kubwerera njira yodutsa, komanso kuika vias ambiri stitched.
Ndi njira ziti zabwino zopangira ma PCB othamanga kwambiri?
Maluso apamwamba kwambiri a PCB amapangidwa bwino, zomwe zimatsimikizira kukhulupirika kwa chizindikiro.
Zida za PCB zothamanga kwambiri zimasankhidwa bwino kuti zitsimikizire kuti kufalikira kwa siginecha kumagwira ntchito.
Kuwongolera kopanga kumachitika. Mfundo zikuluzikulu ulamuliro pa kupanga ndi m'lifupi madera, wosanjikiza katayanitsidwe, vias yokutidwa ndi mkuwa, makulidwe mkuwa wa madera, makulidwe a solder chigoba, etc.
Kodi mtengo wa umwini ndi chiyani zikafika pa ma PCB othamanga kwambiri?
Zotsatirazi zidzakhudza mtengo wa ma PCB othamanga kwambiri.
Zida (zagawo lapansi, makulidwe a gawo lapansi, makulidwe amkuwa)
Zida zopangira zomwe zimagwiritsidwa ntchito
Kuvuta kupanga
Zofuna zamakasitomala
The anasankha ma CD njira
Njira yoperekera yosankhidwa
Momwe Mungapangire High-Speed PCB?
Mapangidwe othamanga kwambiri a PCB ndi njira yovuta kwambiri yomwe imafuna kulingalira kwathunthu kwa ma sigino, kutsekereza, mizere yopatsira, ndi zina zambiri zaukadaulo. Mfundo zotsatirazi zaumisiri zingapereke zina.
Gwiritsani ntchito ma multilayer kuti muyende bwino.
Kufupikitsa kutsogolo pakati pa zikhomo za zipangizo zamagetsi zothamanga kwambiri, zimakhala bwino.
Gwiritsani ntchito malo ozungulira a mizere yofunikira kwambiri kapena mayunitsi amderalo.
Mzere wamawonekedwe apamwamba kwambiri womwe umayikidwa pamtunda umakonda kutulutsa ma radiation akulu amagetsi. Mzere wa chizindikiro chapamwamba kwambiri uyenera kuikidwa pakati pa mphamvu ya mphamvu ndi pansi. Ma radiation opangidwa adzakhala ochepa kwambiri chifukwa cha kuyamwa kwa mafunde a electromagnetic ndi gawo la mphamvu ndi pansi.
Kodi pali kusiyana kotani pakati pa PCB yothamanga kwambiri ndi PCB yokhazikika?
Kwa PCB yokhazikika, anthu amakhudzidwa kwambiri ndi njira yayifupi, kutsekereza, ndi zina za waya wachitsulo. Komabe, ndi kufunafuna ntchito mkulu wa mankhwala pakompyuta, mafupipafupi kufala chizindikiro ayenera ziwonjezeke ndipo anthu nkhawa kwambiri chizindikiro umphumphu kamangidwe ka mkulu-liwiro PCB.
Kodi pali zolingalira zapadera mukamagwira ma PCB othamanga kwambiri?
Zolinga zapadera zagona pakupanga ndi kupanga PCB yothamanga kwambiri mukamagwira ma PCB othamanga kwambiri.
Kutalika kwa njira yosiyana kuyenera kufanana.
Njirayi isadutse ndege zapansi zosakwanira.
Osayika malo oyesera pamizere ina iliyonse yothamanga kwambiri.
Osayendetsa mizere yothamanga kwambiri pafupi kapena pansi pa makristalo, ma oscillator, magetsi osinthira, mabowo okwera, zida zamaginito, kapena tchipisi tambiri timeneti.
Yesetsani kuyendetsa mizere yothamanga kwambiri pamwamba ndi pansi ndikuyika pansi. Sitikulimbikitsidwa kuyendetsa mizere pa ndege yamkati.
Sungani mtunda kuchokera ku siginecha yothamanga kwambiri mpaka m'mphepete mwazosanjikiza pansi kuposa 90mil.
Samalani ndi kagwiridwe ka soketi ndi mawaya olumikizira.
Coppe trace m'lifupi, danga, ndi masanjidwe ake ziyenera kuyendetsedwa bwino kuti zigwirizane ndi mtengo wopingasa.
Mayeso a TDR impedance nthawi zambiri amafunikira ma PCB othamanga kwambiri akamaliza.
Mitundu yoyenera ya zinthu iyenera kusankhidwa kuti ikwaniritse ntchito zomwe mukufuna.
Kutsirizira kwapamwamba kumafunika pa ma PCB othamanga kwambiri, ndipo nthawi zonse timalangiza ENIG pa chithandizo chapamwamba cha ENEPIG.
Kodi mulingo wochuluka wotani wotumizira deta womwe ungakwaniritsidwe pa PCB yothamanga kwambiri?
Mlingo wapamwamba kwambiri wotumizira deta womwe umapezeka pa PCB yothamanga kwambiri ndi 10.0GPs (Gigabits pamphindikati) mpaka pano, koma izi zikuyenda bwino mosalekeza.
Kodi pali zida kapena njira zapadera zomwe zimafunikira popanga PCB yothamanga kwambiri?
Pamafunika PCB mapangidwe mapulogalamu zida ndi EDA kayeseleledwe zida ntchito popanga mkulu-liwiro PCB monga Cadence, Mentor, PADS, Altium, HyperLynx, HFSS, ADS, etc.
Ndikoyenera kudziwa kuti chida chimodzi cha mapulogalamu chingakhale choyenera pulojekiti imodzi ya PCB, pamene chida china cha mapulogalamu chingagwiritsidwe ntchito bwino pamitundu ina ya ntchito. Choncho, n'kofunika kwambiri kupeza bwino PCB kapangidwe mapulogalamu chida.
Kodi zoyambira ndi zotani zomwe zimaperekedwa ndi zinthu zothamanga kwambiri za PCB?
Zinthu zothamanga kwambiri zimatha kukhala FR4, ceramic, PTFE kapena PTFE zolimbikitsidwa ndi 1 Ghz mpaka 100 Ghz. Pali ogulitsa angapo otchuka othamanga kwambiri a PCB monga: Rogers, ISOLA, Ventec, ITEQ, TUC, SHENGYI, Panasonic, Taconic, etc.