Rigid-flex circuits tau dhau los ua neeg nyiam nyob rau xyoo tas los no vim nws sib xyaw ua ke ntawm flex circuits thiab rigidity.& Kev ntseeg tau ntawm FR4 PCB. Ib qho ntawm cov qauv tsim tseem ceeb xav txog thaum tsim lub voj voog nruj-flex yog tus nqi impedance. Rau cov teeb liab dav dav dav dav thiab RF circuits, 50ohm yog ib qho txiaj ntsig zoo tshaj plaws uas cov neeg tsim khoom siv thiab cov chaw tsim khoom pom zoo, yog li vim li cas thiaj xaiv 50ohm? Puas muaj 30ohm lossis 80ohm? Niaj hnub no, peb yuav tshawb txog cov laj thawj yog vim li cas 50ohm impedance yog qhov kev xaiv zoo tshaj plaws rau kev sib tw-flex circuits.
Impedance yog dab tsi thiab vim li cas nws tseem ceeb?
Impedance yog ib qho kev ntsuas ntawm qhov tsis kam mus rau qhov ntws ntawm lub zog hluav taws xob hauv Circuit Court, uas tau hais hauv Ohms thiab ua qhov tseem ceeb hauv kev tsim cov circuits. Nws hais txog cov yam ntxwv impedance ntawm cov kab sib kis, uas yog tus nqi impedance ntawm electromagnetic yoj thaum kis hauv kab / hlau, thiab muaj feem xyuam rau cov duab geometric ntawm kab, cov khoom siv dielectric thiab ib puag ncig ib puag ncig ntawm kab. Peb tuaj yeem hais tias, qhov impedance cuam tshuam rau kev ua haujlwm ntawm kev hloov hluav taws xob thiab kev ua haujlwm tag nrho ntawm Circuit Court.
50ohm impedance rau Rigid-Flex Circuits
Muaj ntau ntau qhov laj thawj vim li cas 50ohm impedance yog qhov kev xaiv zoo tshaj plaws rau kev sib tw-flex circuits:
1. Tus qauv thiab tus nqi qub tso cai los ntawm JAN
Thaum Ntiaj Teb Tsov Rog II, kev xaiv impedance yog nyob ntawm qhov xav tau ntawm kev siv, thiab tsis muaj tus nqi tsim nyog. Tab sis raws li thev naus laus zis nce qib, cov qauv impedance yuav tsum tau muab txhawm rau txhawm rau txhawm rau sib npaug ntawm kev lag luam thiab kev yooj yim. Yog li ntawd, lub koom haum JAN (Joint Army Navy), ib lub koom haum sib koom ua ke ntawm Teb Chaws Asmeskas tub rog, thaum kawg xaiv 50ohm impedance raws li tus qauv tus nqi rau kev txiav txim siab ntawm impedance txuam, teeb liab kev ruaj ntseg thiab teeb liab kev tiv thaiv. Txij thaum ntawd los, 50ohm impedance tau hloov mus rau hauv lub ntiaj teb ua ntej.
2. Performance maximization
Los ntawm PCB tsim foundations, nyob rau hauv lub 50ohm impedance, teeb liab yuav kis tau nyob rau hauv lub siab tshaj plaws hwj chim nyob rau hauv Circuit Court, yog li txo cov teeb liab attenuation thiab xav txog. Lub caij no, 50ohm kuj tseem yog cov kav hlau txais xov uas feem ntau siv impedance hauv kev sib txuas lus wireless.
Feem ntau hais lus, qis impedance, kev ua haujlwm ntawm cov kab sib kis yuav zoo dua. Rau qhov kis kab mob nrog ib kab dav dav, qhov ze dua rau hauv av dav hlau, qhov sib thooj EMI (Electro Magnetic Interference) yuav txo qis, thiab crosstalk yuav txo thiab. Tab sis, los ntawm qhov pom ntawm tag nrho txoj kev ntawm lub teeb liab, impedance cuam tshuam rau lub peev xwm ntawm cov chips - feem ntau ntawm cov chips thaum ntxov los yog cov neeg tsav tsheb tsis tuaj yeem tsav cov kab xa hluav taws xob uas qis dua 50ohm, thaum cov kab xa hluav taws xob ntau dua nyuaj rau kev siv thiab tsis ua. ua tau zoo, yog li kev sib haum xeeb ntawm 50ohm impedance yog qhov kev xaiv zoo tshaj plaws thaum lub sijhawm.
3. Yooj Yim Tsim
Hauv PCB tsim, nws yog ib txwm yuav tsum tau ua kom haum nrog kab qhov chaw thiab qhov dav kom txo tau cov teeb liab kev xav thiab crosstalk. Yog li thaum tsim cov kab, peb yuav xam ib pawg rau peb qhov project, uas yog raws li thickness, substrate, txheej thiab lwm yam tsis suav impedance, xws li hauv qab daim ntawv.
Raws li peb cov kev paub dhau los, 50ohm yog ib qho yooj yim los tsim pawg, yog li nws tau siv dav hauv kev lag luam hluav taws xob.
4. Yooj yim thiab du ntau lawm
Xav txog cov cuab yeej ntawm feem ntau cov tuam txhab PCB uas twb muaj lawm, nws yog qhov yooj yim los tsim 50ohm impedance PCB.
Raws li peb paub, qis impedance yuav tsum tau ua kom haum cov kab dav dav thiab nyias nruab nrab lossis loj dielectric tas li, nws yog qhov nyuaj rau kev sib ntsib hauv qhov chaw rau tam sim no high density circuit boards. Txawm hais tias qhov siab dua impedance xav tau cov kab dav dav dua thiab tuab dua nruab nrab lossis me me dielectric tas li, uas tsis yog qhov cuam tshuam rau EMI thiab kev sib tham sib cuam tshuam, thiab kev ntseeg tau ntawm kev ua haujlwm yuav tsis zoo rau ntau lub voj voog thiab los ntawm kev xav ntawm ntau lawm.
Tswj 50ohm impedance nyob rau hauv kev siv ntawm cov substrate (FR4, thiab lwm yam) thiab cov tub ntxhais, zus tau tej cov board thickness xws li 1 hli, 1.2 hli, yuav tsim tau kab dav dav ntawm 4 ~ 10mil, yog li cov fabrication yog heev yooj yim, thiab kev ua cov cuab yeej siv tsis yog qhov xav tau siab heev.
5. Compatibility nrog High-Frequency Signals
Ntau cov qauv thiab kev tsim khoom-cov khoom siv rau cov rooj sib tham, cov khoom sib txuas, thiab cov cables yog tsim los rau 50ohm impedance, yog li siv 50ohm txhim kho kev sib raug zoo ntawm cov khoom siv.
6. Nqi-zoo
Lub 50ohm impedance yog kev lag luam thiab kev xaiv zoo tshaj plaws thaum xav txog qhov sib npaug ntawm cov nqi tsim khoom thiab cov teeb liab ua haujlwm.
Nrog nws cov yam ntxwv sib kis tau zoo thiab tsis tshua muaj teeb liab distortion tus nqi, 50ohm impedance yog dav siv nyob rau hauv ntau lub teb, xws li video signals, high-speed data communications, thiab lwm yam. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov, thaum 50ohm yog ib qho ntawm feem ntau siv impedances hauv hluav taws xob engineering, hauv qee qhov kev siv, xws li xov tooj cua zaus, lwm yam impedance yuav tsum tau ua kom tau raws li cov kev cai tshwj xeeb. Yog li ntawd, hauv kev tsim tshwj xeeb, peb yuav tsum xaiv qhov tsim nyog impedance tus nqi raws li qhov tseeb.
Qhov zoo tshaj plaws Technology muaj kev nplua nuj tsim nyob rau hauv nruj flex Circuit Court board, txawm ib txheej, ob txheej los yog ntau txheej FPC. Tsis tas li ntawd, Best Tech muaj FR4 PCB (txog 32 txheej), hlau tub ntxhais PCB, ceramic PCB thiab qee qhov tshwj xeeb PCB xws li RF PCB, HDI PCB, ntxiv nyias thiab hnyav tooj liab PCB. Txais tos tiv tauj peb yog tias koj muaj lus nug PCB.