Piv txwv li, 10Gb / s high-speed digital teeb liab yog ib lub xwmfab nthwv dej, uas tuaj yeem suav tau tias yog qhov superposition ntawm sine wave signals ntawm ntau zaus. Yog li ntawd, 10Gb / s suav nrog ntau qhov sib txawv zaus: 5GHz cov teeb liab zaus zaus, qhov thib peb xaj 15GHz, thib tsib kev txiav txim 25GHz, xya qhov kev txiav txim 35GHz teeb liab, thiab lwm yam. Ua kom muaj kev ncaj ncees ntawm cov teeb liab digital thiab qhov steepness ntawm sab sauv thiab sab ntug, raws li zoo li qhov poob qis thiab tsis tshua muaj kev sib kis ntawm RF thiab microwave (qhov kev sib raug zoo ntawm cov teeb liab digital mus txog lub tshuab hluav taws xob microwave). Yog li ntawd, nyob rau hauv ntau yam, cov khoom xaiv ntawm high-speed digital circuit PCBs zoo ib yam li RF microwave circuits.
Txoj kev xaiv rauhigh-frequency thiab high-speeddaim hlau
Hauv kev ua haujlwm engineering, kev xaiv ntawm cov rooj tsavxwm siab yuav zoo li yooj yim, tab sis tseem muaj ntau yam los xav txog. Los ntawm kev taw qhia ntawm tsab xov xwm no, raws li PCB tsim engineer lossis tus thawj coj ua haujlwm siab, kuv tau nkag siab qee yam ntawm cov yam ntxwv thiab kev xaiv ntawm cov laug cam. Nkag siab txog hluav taws xob, thermal, thiab kev ntseeg siab ntawm cov ntawv hlau. Tsim nyog siv lamination los tsim cov khoom lag luam nrog kev ntseeg siab thiab kev ua haujlwm zoo, thiab ua kom zoo dua thiab xav txog ntau yam.
Cov hauv qab no yuav qhia txog cov ntsiab lus tseem ceeb los txiav txim siab thaum xaiv cov laug cam tsim nyog:
1. Manufacturability:
Piv txwv li, dab tsi yog qhov ntau yam kev ua haujlwm, qhov kub thiab txias, CAF / tshav kub tsis kam, mechanical toughness (adhesion) (kev ntseeg tau zoo), thiab kev ntsuas hluav taws kub;
2. Ntau yam kev ua tau zoo sib xws nrog cov khoom (hluav taws xob, kev ua haujlwm ruaj khov, thiab lwm yam):
Tsawg poob, ruaj khov Dk / Df tsis, tsis tshua muaj dispersion, me me coefficient ntawm variation nrog zaus thiab ib puag ncig, me me kam rau cov thickness thiab cov ntsiab lus nplaum (nrog impedance zoo tswj). Yog tias txoj hlua txuas ntev, xav txog qhov tsis tshua muaj roughness tooj liab ntawv ci. Lwm lub ntsiab lus yog tias qhov pib ntawm kev kub ceev Circuit Court tsim yuav tsum tau simulation, thiab cov txiaj ntsig simulation yog cov qauv siv rau kev tsim. Lub "Xingsen Technology Agilent (High Speed / RF) Joint Laboratory" tau daws qhov teeb meem kev ua tau zoo ntawm cov txiaj ntsig simulation thiab kev sim tsis sib xws, thiab tau ua ntau qhov kev simulation thiab qhov tseeb kuaj kaw-voj pov thawj. Los ntawm cov txheej txheem tshwj xeeb, nws tuaj yeem ua tiav qhov sib xws ntawm simulation thiab ntsuas qhov tseeb.
Tsawg poob, ruaj khov Dk / DF tsis, tsis tshua muaj dispersion, me me coefficient ntawm variation nrog zaus thiab ib puag ncig, thiab me me kam rau cov thickness thiab cov ntsiab lus nplaum (zoo impedance tswj). Yog tias txoj hlua txuas ntev, xav txog qhov tsis tshua muaj roughness tooj liab ntawv ci. Ntawm qhov tod tes, simulation yog yuav tsum tau nyob rau hauv cov theem pib ntawm high-speed Circuit Court tsim, thiab simulation cov txiaj ntsig yog cov qauv siv rau kev tsim. Lub "Xingsen Technology Agilent (High Speed / RF) Joint Laboratory" tau daws qhov teeb meem ntawm kev ua tau zoo ntawm kev simulation tsis sib xws thiab kev sim. Nws ua qhov kev txheeb xyuas qhov kaw dav dav ntawm kev simulation thiab kev sim tiag tiag, thiab ua tiav qhov sib xws ntawm simulation thiab ntsuas qhov tseeb los ntawm cov txheej txheem tshwj xeeb.
3. Lub sijhawm muaj cov khoom siv:
Ntau lub rooj tsav xwm ntau zaus ntawm kev yuav khoom yog ntev heev, txawm tias 2-3 hli; Tsuas yog cov pa hluav taws xob ntau zaus RO4350, uas yog nyob rau hauv Tshuag, ntau lub rooj tsavxwm siab yuav tsum tau muab los ntawm cov neeg siv khoom. Yog li ntawd, high-frequency boards yuav tsum tau sib tham nrog cov neeg tsim khoom ua ntej thiab npaj kom sai li sai tau;
4. Tus nqi tsim nyog:
Raws li tus nqi rhiab heev ntawm cov khoom, txawm tias nws yog cov khoom siv los yog kev sib txuas lus, kev kho mob, kev lag luam, lossis kev siv tub rog;
5. Kev siv ntawm cov cai thiab cov cai, thiab lwm yam:
Txhawm rau koom nrog cov kev cai ib puag ncig ntawm ntau lub teb chaws thiab ua tau raws li RoHS thiab cov kev cai tsis muaj halogen.
Ntawm cov xwm txheej saum toj no, kev khiav hauj lwm ceev ntawm high-speed digital circuits yog qhov tseem ceeb hauv kev xaiv PCB. Qhov siab dua ntawm Circuit Court ceev, qhov tsawg dua qhov xaiv pcbdf tus nqi. Nruab nrab thiab qis qis Circuit Court boards haum rau 10Gb / s digital circuits; Tsawg poob board haum rau 25gb / s digital circuits; Ultra low poob flat panels yuav hloov mus rau qhov ceev ceev digital circuits, nrog ceev txog 50GB / s lossis siab dua.
Los ntawm kev xaav ntawm cov khoom Df:
Lub rooj tsav xwm hauv Circuit Court nrog Df ntawm {{0}}.01 thiab 0.005 yog haum rau cov circuits digital nrog qhov txwv siab tshaj ntawm 10Gb/S;
Lub rooj tsav xwm hauv Circuit Court nrog Df nruab nrab ntawm {{0}}.005 thiab 0.003 yog haum rau cov circuits digital nrog qhov txwv siab tshaj ntawm 25Gb/S;
Circuit boards nrog Df tsis pub tshaj 0.0015 yog haum rau 50Gb/S lossis txawm tias high-speed digital circuits.