High speed PCB POFV ufakelo ilahleko uvavanyo enepig| YMSPCB

 Yintoni isantya esiphezulu sePCB?

"Isantya esiphezulu" ngokuqhelekileyo sitolikwa sithetha iisekethe apho ubude bomgca wokunyuka okanye owehlayo mkhulu kunesinye kwisithandathu sobude bomzila wothumelo omkhulu kunobude bomgca wothumelo, ngoko ubude bomgca wothumelo bubonisa ukuziphatha komgca odibeneyo.

Kwi- PCB yesantya esiphezulu , ixesha lokunyuka likhawuleza ngokwaneleyo ukuba i-bandwidth yesignali yedijithali inokwandisa kwi-MHz okanye i-GHz ephezulu. Xa oku kusenzeka, kukho iingxaki ezithile zokubonisa eziya kuqatshelwa ukuba ibhodi ayilwanga kusetyenziswa imithetho yoyilo yePCB enesantya esiphezulu. Ngokukodwa, umntu unokuqaphela:

1. Iringithoni enkulu edlulayo engamkelekanga. Oku kwenzeka ngokubanzi xa izikhondo zingekho banzi ngokwaneleyo, nangona kufuneka ulumke xa usenza banzi imikhondo yakho (bona icandelo kwi Impedance Contorl kuYilo lwePCB ngezantsi). Ukuba ukukhala okwethutyana kukhulu kakhulu, uya kuba ne-overshoot enkulu okanye i-undershoot kutshintsho lwakho lwesignali.

2.I-crosstalk eqinile. Njengoko isantya somqondiso sinyuka (okt, njengoko ixesha lokunyuka liyancipha), i-capacitive crosstalk inokuba nkulu kakhulu njengoko amava akhoyo anyanzeliswayo e-capacitive impedance.

3.Reflections off kumqhubi kunye nezixhobo zomamkeli. Iimpawu zakho zinokubonisa ngaphandle kwamanye amacandelo ngalo lonke ixesha kukho ukungahambelani kokuphazamiseka. Nokuba ngaba ukungahambelani kwe-impedance kuyabaluleka kufuna ukujongwa kwi-impedance yegalelo, i-impedance yomthwalo, kunye ne-impedance ye-transmission line character ku-interconnect. Unokufunda ngakumbi malunga noku kwicandelo elilandelayo.

Iingxaki ze-4.Power ingqibelelo (i-PDN edlulayo i-ripple, i-bounce yomhlaba, njl.). Le yenye isethi yeengxaki ezingenakuthintelwa kulo naluphi na uyilo. Nangona kunjalo, i-PDN edlulayo i-ripple kunye nayo nayiphi na i-EMI enesiphumo inokuncitshiswa kakhulu ngoyilo olululo lwe-stackup kunye nemilinganiselo yokudibanisa. Unokufunda ngakumbi malunga nesantya esiphezulu sePCB uyilo lokupakisha kamva kwesi sikhokelo.

5.I-EMI eqhutywe kwaye i-radiated EMI. Uphononongo lokusombulula iingxaki ze-EMI lubanzi, zombini kwinqanaba le-IC kunye nenqanaba loyilo lwePCB elikhawulezayo. I-EMI yinkqubo ehambelanayo; ukuba uyila ibhodi yakho ukuba ibe ne-EMI immunity eyomeleleyo, iya kukhupha i-EMI encinci. Kwakhona, uninzi loku kubilisa ekuyileni istaki sePCB esifanelekileyo.

Ii-PCB ze-high-frequency zihlala zibonelela ngoluhlu lwamaza ukusuka kwi-500MHz ukuya kwi-2 GHz, ezinokuhlangabezana neemfuno zoyilo lwe-PCB enesantya esiphezulu, i-microwave, i-radiofrequency, kunye nezicelo eziphathwayo. Xa i-frequency ingaphezulu kwe-1 GHz, sinokuyichaza njengefrikhwensi ephezulu.

Ukuntsonkotha kwezixhobo ze-elektroniki kunye nokutshintsha okuhlala kusanda kule mihla kwaye kufuna ukukhawuleza kokuhamba komqondiso. Ke, iifrikhwensi zothumelo eziphezulu ziyafuneka. Ii-PCBs ezikwi-frequency ephezulu zinceda kakhulu xa zidibanisa iimfuno zomqondiso ezizodwa kumacandelo e-elektroniki kunye neemveliso ezinenzuzo ezifana nokusebenza okuphezulu, kunye nesantya esikhawulezayo, ukuthomalalisa okusezantsi, kunye neepropathi zedielectric ezingaguqukiyo.Ezinye iingqwalaselo zokuyilwa kwee-PCBs ezikwi-frequency ephezulu.

Ii-PCB ze-high-frequency zisetyenziswa ikakhulu kwi-radio kunye ne-high-speed digital applications, ezifana ne-5G yonxibelelwano olungenazintambo, i-automotive radar sensors, i-aerospace, i-satellites, njl.

· Uyilo olunamaleko amaninzi

Sidla ngokusebenzisa ii-PCB ezinamaleko lwe-PCB olusebenza rhoqo. Ii-PCB ezinomaleko amaninzi zinoxinaniso lwendibano kunye nomthamo omncinci, okwenza ukuba zilungele kakhulu iiphakheji zempembelelo. Kwaye iibhodi ezinamanqwanqwa amaninzi zilungele ukunciphisa uxhulumaniso phakathi kwamacandelo e-elektroniki kunye nokuphucula isantya sokuhanjiswa komqondiso.

Ukuyila inqwelomoya ephantsi yinxalenye ebalulekileyo yezicelo ze-high-frequency kuba ayigcini nje kuphela umgangatho womqondiso kodwa inceda ekunciphiseni i-EMI radiations.Ibhodi yefrikhwensi ephezulu yezicelo ezingenazintambo kunye namazinga edatha kuluhlu oluphezulu lwe-GHz luneemfuno ezikhethekileyo kwizinto ezisetyenzisiweyo:

1. Imvume elungelelanisiweyo.

2.Ukuthotywa okuphantsi kokuhanjiswa komqondiso okusebenzayo.

3.Ukwakhiwa kwe-Homogeneous kunye nokunyamezela okuphantsi kwi-insulation thickness kunye ne-dielectric constant. Imfuno ye-high-frequency kunye ne-high speed-speed iimveliso ze-PCB inyuka ngokukhawuleza kule mihla. Njengomvelisi we- umenzi PCB , i-YMS igxile ekuboneleleni abathengi ngeprototyping ye-PCB ethembekileyo ye-frequency ephezulu ekumgangatho ophezulu. Ukuba unayo nayiphi na ingxaki ngoyilo lwePCB okanye ukwenziwa kwePCB, nceda uzive ukhululekile ukuqhagamshelana nathi.