Lub hauv paus kev txhawb nqa ntawm 77GHz millimeter yoj radar:high zaus pcbtsim kom muaj kev tiv thaiv kab mob kom txawj tsav tsheb muaj kev nyab xeeb.
Lub 77GHz millimeter nthwv dej radar yog cov khoom siv tseem ceeb ntawm cov khoom siv kev nyab xeeb rau kev tsav tsheb ntse, thiab siab -frequency pcb tsis yog ib qho kev sib txuas ntawm cov cab kuj yooj yim, tab sis lub hauv paus kev txhawb nqa ncaj qha txiav txim siab qhov tseeb ntawm radar nrhiav kom raug, teeb liab stability, thiab tag nrho scene kev ntseeg tau. Los ntawm kev xaiv cov khoom siv, precision manufacturing mus rau qib kev kuaj xyuas lub tsheb, nws ua tiav ua kom muaj kev ruaj ntseg tiv thaiv kab rau kev tsav tsheb ntse.
Core positioning: High zaus pcb yog "RF qaum" ntawm 77GHz radar
Kev ua haujlwm wavelength ntawm 77GHz millimeter yoj radar yog tsawg dua 4 hli, thiab pcb nws tus kheej tau dhau los ua ib feem tseem ceeb ntawm RF teeb liab txoj kev, ncaj qha ua peb lub luag haujlwm kev nyab xeeb:
Kev ua tiav lub cev ntawm lub radar transceiver nti, kav hlau txais xov array, thiab teeb liab ua module ua rau tsis tshua muaj kev sib kis ntawm RF signals los ntawm nti mus rau lub kav hlau txais xov.
Los ntawm kev tsim lub microwave waveguide zoo li cov qauv los ntawm kev tsim cov txheej txheem meej, cov nyhuv electromagnetic shielding yog maximized, thiab parasitic hom thiab hluav taws xob poob yog suppressed.
Synchronize fais fab faib, grounding system, thiab mechanical kev koom ua ke kom ua tiav kev ua haujlwm ruaj khov ntawm ntau lub modules hauv ib qho me me radar module.
Kev xaiv cov khoom siv: Xauv lub teeb liab kev nyab xeeb ciam teb los ntawm qhov chaw
Hauv kev teb rau qhov kev ua tau zoo tshaj plaws ntawm 77GHz zaus band, siab -frequency printed circuit boards tswj lub teeb liab poob thiab kev ua haujlwm drift los ntawm qhov chaw los ntawm kev xaiv cov khoom siv meej:
Core RF txheej: High zaus substrates xws li RO4350B thiab RO3003 feem ntau yog siv, nrog nruj tswj ntawm Dk kam rau ua nyob rau hauv ± 0.05. Lub Df ntawm 77GHz yog tsawg li 0.0037, thiab qhov kev poob qis yog tswj hauv qab 0.5dB / nti.
Mixed voltage drop scheme: Txais ib "siab- cov khoom siv zaus + FR-4" hybrid laminated qauv, txheej txheej txheej yog ua tiav nrog Rogers cov khoom siv rau RF signals, thiab txheej sab hauv yog nqa nrog siab TG FR-4 los nqa cov digital circuits, txo cov nqi tag nrho los ntawm ntau dua 25% thaum ua haujlwm siab-f.
Tag nrho qhov kub thiab txias: Xaiv lub substrate nrog X / Y-axis CTE uas yuav luag zoo tag nrho cov ntawv ci tooj liab (17ppm /℃C) kom tsis txhob muaj kev sib tsoo thiab kev ua haujlwm nrawm thaum lub tsheb puv tsheb kub ntawm -40℃C txog 150℃C.
Cov txheej txheem Precision: micrometer qib precision xyuas kom pom kev ntseeg tau
77GHz millimeter yoj teeb liab muaj qhov ua siab ntev heev rau kev tsim kev sib txawv, thiab cov ntawv luam tawm ntau zaus tshem tawm kev nyab xeeb los ntawm cov txheej txheem huab:
Kab raug: Siv LDI laser direct sau tshuab, qhov tsawg kawg nkaus kab dav / kab sib nrug tuaj yeem ncav cuag 0.075mm, thiab cov kab dav dav yog tswj nyob rau hauv ± 0.02mm kom tsis txhob teeb liab distortion los ntawm impedance mutations.
Ultra low profile tooj liab ntawv ci: Qhov saum npoo roughness Rz ntawm cov ntawv ci tooj liab yog tsawg dua 2 μ m, haum rau cov tawv nqaij tsis tshua muaj qhov tob ntawm 0.24 μ m ntawm 77GHz, tshem tawm cov teeb liab ntxiv los ntawm kev tawg ntawm tus neeg xyuas pib.
Interlayer alignment: Interlayer offset raug yog tswj nyob rau hauv ± 25 μ m kom ntseeg tau tias electromagnetic kev ncaj ncees ntawm multi- txheej laminate qauv thiab suppress teeb liab crosstalk.
Kev txheeb xyuas qib tsheb: Kho kom haum rau kev tsav tsheb ntse kev nyab xeeb rau txhua qhov chaw
High zaus luam ntawv Circuit Court boards yuav tsum tau ua nruj me ntsis raws li automotive qib kev ntseeg tau los xyuas kom meej tias lawv tsis poob nyob rau hauv tag nrho lawv lub neej voj voog.
Ua tiav kev xeem dhau lub tsheb ib puag ncig xws li -40 ° C ~ 150 ° C kub caij tsheb kauj vab, 85 ° C / 85% RH ntev- lub sijhawm cua sov, thiab kev co tsis sib xws los xyuas kom muaj kev ruaj ntseg ntev ntawm cov pob qij txha thiab cov khoom siv.
nruj me ntsis ua raws li ISO 26262 tus qauv kev nyab xeeb kev ua haujlwm, thiab zam kev ua haujlwm radar tsis ua haujlwm los ntawm ib qho kev ua txhaum los ntawm kev rov ua dua hauv av thiab tsim teeb liab cais.
Txhawm rau ua tiav qhov kev ua tau zoo ib yam hauv kev tsim khoom loj, qhov hloov pauv impedance ntawm tag nrho batch yog tswj nyob rau hauv ± 5%, kom ntseeg tau ruaj khov ntau yam thiab ntsuas qhov ntsuas qhov ntsuas rau txhua lub rooj tsav xwm radar.
Kev lag luam sib txawv: Kev ruaj ntseg hloov kho kom haum rau 4D duab radar
Nrog rau cov khoom loj zuj zus ntawm 8- transmitter thiab 8-receiver architecture 4D imaging radar, high-frequency pcb yog iterating rau kev ua tau zoo dua:
Txhim kho los ntawm 4 txheej pawg thawj coj saib mus rau 6 txheej thiab 8 txheej pawg thawj coj saib, sib koom ua ke ntau RF raws thiab kav hlau txais xov arrays, txhawb kev tshawb pom ntev ntev tshaj li 400 meters thiab kab rov tav kev daws teeb meem ntawm 0.8 degree
Integrated tsim ntawm kav hlau txais xov thiab RF Circuit Court, ntxiv txo cov teeb liab kis tau tus mob link poob thiab txhim kho kev paub tseeb rau cov neeg taug kev thiab cov teeb meem me me.
Lub ntiaj teb no kev lag luam loj ntawm high zaus pcb rau automotive radar yuav tsum mus txog 389 lab US las los ntawm 2026, nrog 77GHz tseem tshuav cov tub ntxhais xav tau.
high zaus pcb