1. Kupanga mipata panthawi ya mapangidwe a PCB kumaphatikizapo:

Kuthamanga komwe kumachitika chifukwa cha kugawanika kwa mphamvu kapena ndege zapansi; pamene pali magetsi osiyanasiyana kapena malo pa PCB, n'zosatheka kugawira ndege wathunthu aliyense maukonde magetsi ndi maukonde pansi. Njira yodziwika bwino ndiyo kugawa mphamvu kapena kugawa pansi pa ndege zingapo. Mipata imapangidwa pakati pa magawo osiyanasiyana pa ndege imodzi.

M'mabowo ndi wandiweyani kwambiri kuti apange mipata (kudzera mabowo monga ziwiya ndi vias); pamene kudzera mabowo kudutsa pansi wosanjikiza kapena mphamvu wosanjikiza popanda kugwirizana magetsi kwa iwo, malo ena ayenera kusiyidwa mozungulira kudzera mabowo kudzipatula magetsi; koma podutsa mabowo Pamene mabowo ali pafupi kwambiri, mphete za spacer zimadutsana, kupanga mipata.

2. Mphamvu ya slotting pa magwiridwe a EMC a mtundu wa PCB

Grooving ikhudzanso magwiridwe antchito a EMC a board ya PCB. Izi zitha kukhala zoyipa kapena zabwino. Choyamba tiyenera kumvetsetsa kugawidwa kwapamtunda kwa zizindikiro zothamanga kwambiri ndi zizindikiro zotsika kwambiri. Pakuthamanga kochepa, zamakono zimayenda panjira yotsika kwambiri. Chithunzi chomwe chili pansipa chikuwonetsa momwe mphamvu yocheperako imayenda kuchokera ku A kupita ku B, chizindikiro chake chobwereranso chimabwerera kuchokera pansi kupita kugwero. Panthawiyi, kugawidwa kwapadziko lapansi kumakhala kwakukulu.

Pakuthamanga kwambiri, zotsatira za inductance pa njira yobwereranso chizindikiro zidzapitirira zotsatira za kukana. Zizindikilo zobwerera mwachangu kwambiri zidzayenda m'njira yotsika kwambiri. Panthawiyi, kugawidwa kwapadziko lapansi kumakhala kochepa kwambiri, ndipo chizindikiro chobwerera chimayikidwa pansi pa mzere wa chizindikiro mu mtolo.

Pakakhala mabwalo osagwirizana pa PCB, "kupatukana kwapansi" kumafunikira, ndiko kuti, ndege zapansi zimayikidwa mosiyana malinga ndi magetsi osiyanasiyana, ma digito ndi ma analogi, zizindikiro zothamanga kwambiri komanso zotsika kwambiri, komanso zamakono. ndi zizindikiro zochepa zamakono. Kuchokera pakugawidwa kwa chizindikiro chothamanga kwambiri ndi kubwereza kwa chizindikiro chotsika kwambiri chomwe chaperekedwa pamwambapa, zikhoza kumveka mosavuta kuti malo osiyana amatha kulepheretsa kuwonjezereka kwa zizindikiro zobwerera kuchokera kumabwalo osagwirizana ndikuletsa kugwirizanitsa kwa mzere wapansi wa impedance.

Koma mosasamala kanthu za ma siginecha othamanga kwambiri kapena ma siginecha otsika kwambiri, mizera yamasigino ikawoloka mipata pa ndege yamagetsi kapena ndege yapansi panthaka, padzachitika mavuto ambiri, kuphatikiza:

Kuchulukitsa komwe kuli kozungulira komweko kumawonjezera loop inductance, kupangitsa kuti ma waveform azituluka mosavuta;

Kwa mizere yothamanga kwambiri yomwe imafunikira kuwongolera kokhazikika ndipo imayendetsedwa molingana ndi mtundu wa stripline, mtundu wa stripline udzawonongeka chifukwa cha kutsetsereka kwa ndege yapamwamba kapena ndege yapansi kapena ndege zam'mwamba ndi zam'munsi, zomwe zimapangitsa kuti impedans isapitirire komanso yayikulu. chizindikiro cha kukhulupirika. mavuto okhudzana ndi kugonana;

Amachulukitsa kutulutsa kwa radiation mumlengalenga ndipo amatha kusokonezedwa ndi maginito amlengalenga;

Kutsika kwamagetsi othamanga kwambiri pa loop inductance kumapanga gwero la radiation yodziwika bwino, ndipo ma radiation amtundu wamba amapangidwa kudzera pazingwe zakunja;

Wonjezerani kuthekera kwa ma frequency high-frequency signal crosstalk ndi mabwalo ena pa bolodi.

Pakakhala mabwalo osagwirizana pa PCB, "kupatukana kwapansi" kumafunikira, ndiko kuti, ndege zapansi zimayikidwa mosiyana malinga ndi magetsi osiyanasiyana, ma digito ndi ma analogi, zizindikiro zothamanga kwambiri komanso zotsika kwambiri, komanso zamakono. ndi zizindikiro zochepa zamakono. Kuchokera pakugawidwa kwa chizindikiro chothamanga kwambiri ndi kubwereza kwa chizindikiro chotsika kwambiri chomwe chaperekedwa pamwambapa, zikhoza kumveka mosavuta kuti malo osiyana amatha kulepheretsa kuwonjezereka kwa zizindikiro zobwerera kuchokera kumabwalo osagwirizana ndikuletsa kugwirizanitsa kwa mzere wapansi wa impedance.

Koma mosasamala kanthu za ma siginecha othamanga kwambiri kapena ma siginecha otsika kwambiri, mizera yamasigino ikawoloka mipata pa ndege yamagetsi kapena ndege yapansi panthaka, padzachitika mavuto ambiri, kuphatikiza:

Kuchulukitsa komwe kuli kozungulira komweko kumawonjezera loop inductance, kupangitsa kuti ma waveform azituluka mosavuta;

Kwa mizere yothamanga kwambiri yomwe imafunikira kuwongolera kokhazikika ndipo imayendetsedwa molingana ndi mtundu wa stripline, mtundu wa stripline udzawonongeka chifukwa cha kutsetsereka kwa ndege yapamwamba kapena ndege yapansi kapena ndege zam'mwamba ndi zam'munsi, zomwe zimapangitsa kuti impedans isapitirire komanso yayikulu. chizindikiro cha kukhulupirika. mavuto okhudzana ndi kugonana;

Amachulukitsa kutulutsa kwa radiation mumlengalenga ndipo amatha kusokonezedwa ndi maginito amlengalenga;

Kutsika kwamagetsi othamanga kwambiri pa loop inductance kumapanga gwero la radiation yodziwika bwino, ndipo ma radiation amtundu wamba amapangidwa kudzera pazingwe zakunja;

Wonjezerani kuthekera kwa ma frequency high-frequency signal crosstalk ndi mabwalo ena pa bolodi

3. PCB mapangidwe njira slotting

Kukonzekera kwa groove kuyenera kutsatira mfundo izi:

Kwa mizere yothamanga kwambiri yomwe imafunikira kuwongolera kokhazikika, mawonekedwe awo amaletsedwa kuwoloka mizere yogawanika kuti asapangitse kulephera kwamphamvu ndikuyambitsa zovuta zazikulu zaumphumphu;

Pakakhala mabwalo osagwirizana pa PCB, kupatukana kwapansi kuyenera kuchitidwa, koma kupatukana kwapansi sikuyenera kuchititsa mizere yothamanga kwambiri kuti idutse mawaya ogawanika, ndikuyesera kuti musapangitse mizere yotsika kwambiri kuti idutse mawaya ogawanika;

Ngati njira yodutsa m'mipata sikungalephereke, kulumikiza kuyenera kuchitika;

Cholumikizira (chakunja) sichiyenera kuyikidwa pansi. Ngati pali kusiyana kwakukulu komwe kungatheke pakati pa mfundo A ndi mfundo B pamtunda wosanjikiza pachithunzichi, ma radiation odziwika bwino amatha kupangidwa kudzera mu chingwe chakunja;

Popanga ma PCB a zolumikizira zolimba kwambiri, pokhapokha ngati pali zofunikira zapadera, muyenera kuwonetsetsa kuti maukonde apansi akuzungulira pini iliyonse. Mukhozanso kukonza maukonde pansi mofanana pokonza zikhomo kuonetsetsa kupitiriza kwa ndege pansi ndi kupewa Kupanga slotting.