Ubuninzi bereyithingi yefrikhwensi yokujika ngokukhawuleza kwebhodi yePCB yeprototype

Xa kufikwa kwizixhobo zombane kunye neebhodi zesekethe eziprintiweyo (PCBs), umba ophambili ojongwa ziinjineli kunye nabavelisi bubuninzi be-frequency rated frequency. Olu kulinganisa lumisela i-frequency ephezulu apho isiphaluka sinokusebenza ngokuthembekileyo ngaphandle kokulahlekelwa okubonakalayo okanye ukuthotywa kwesignali.Kwesi sithuba sebhlog, siza kuphonononga ukubaluleka komgangatho wokukalwa rhoqo ukuze ujike ngokukhawuleza iibhodi zePCB zeprototype kwaye sixoxe ukuba iluchaphazela njani uyilo kunye nokusebenza kwezixhobo zombane.

Ubuninzi bomlinganiselo wefrikhwensi yiparameter ebalulekileyo xa ujongene nesantya esiphezulu kunye neenkqubo zombane ezintsonkothileyo.Ibhekisa kubuninzi befrikhwensi apho umqondiso unokuhanjiswa ngePCB ngaphandle kokuphazamiseka okanye ukulahleka komqondiso. Olu kulinganisa luba lubaluleke ngakumbi xa kufikwa kwiibhodi zePCB eziguquka ngokukhawuleza, njengoko ezi bhodi zihlala zisetyenziswa kuphuhliso kunye nezigaba zovavanyo lwezixhobo zombane ezitsha.

Iibhodi zePCB eziguqukayo ezikhawulezayo zenziwa ngexesha elifutshane kwaye ziqhele ukusetyenziselwa ubungqina bengcamango, uvavanyo, kunye nokuqinisekiswa koyilo lokuqala.Injongo yabo kukuqinisekisa ukuba imveliso yokugqibela yenza njengoko kulindelekile ngaphambi kokungena kwimveliso epheleleyo. Ngoko ke, kufuneka basebenze ngokuthembekileyo kwixesha elifunekayo ukuze babonise ngokuchanekileyo ukusebenza kwemveliso yokugqibela.

Ubuninzi bexesha elilinganiselweyo lebhodi ye-PCB ye-prototyping ekhawulezayo ichatshazelwa yizinto ezahlukeneyo, ezibandakanya izinto ze-PCB, uyilo loyilo, iimpawu zomgca wothumelo, kunye nobukho bako nakuphi na ukuphazamiseka okanye imithombo yengxolo.Ukhetho lwezinto eziphathekayo lubalulekile kuba ezinye iindidi zee-PCBs zinokuphatha amaza omoya aphezulu ngokufanelekileyo kunezinye. Izinto eziphezulu ze-frequency ezifana neRogers 4000 Series, iTeflon, okanye i-PTFE laminates zihlala zisetyenziselwa ukuguqula ngokukhawuleza ii-PCB zeprototype ukuphumeza ukusebenza okuphezulu kwiifrikhwensi eziphezulu.

Uyilo loyilo lukwadlala indima ebalulekileyo ekumiseleni ubungakanani bereyithingi yobuninzi bebhodi yePCB.Ukulinganisa okufanelekileyo kwe-impedance, ubude bomkhondo okulawulwayo, kunye nokunciphisa ukubonakalisa umqondiso okanye i-crosstalk ngamanyathelo abalulekileyo okuqinisekisa ukuba imiqondiso isasazeka ngokufanelekileyo ngaphandle kokuthotywa. Uyilo lwePCB oluyilwe ngononophelo lunciphisa umngcipheko wokugqwethwa komqondiso kwaye lugcina imfezeko yomqondiso we-frequency ephezulu.

Iimpawu zomzila wothumelo, ezifana nobubanzi bomkhondo, ubukhulu, kunye nomgama ukusuka kwinqwelomoya ephantsi, nazo zichaphazela ubuninzi bezakhelo ezilinganiselweyo.Ezi parameters zimisela i-impedance yeempawu zomgca wothumelo kwaye kufuneka zibalwe ngononophelo ukuze zihambelane ne-frequency efunekayo. Ukungaphumeleli ukwenza oko kunokubangela ukubonakaliswa komqondiso kunye nokulahlekelwa kwemfezeko yomqondiso.

Ukongeza, ubukho bokuphazamiseka okanye imithombo yengxolo inokuchaphazela ubuninzi bexesha elilinganiselweyo lebhodi yePCB yokujika ngokukhawuleza.Ukukhusela okufanelekileyo kunye nobuchule bomhlaba kufuneka busetyenziswe ukunciphisa imiphumo yemithombo yengxolo yangaphandle kunye nokuqinisekisa ukusebenza okuthembekileyo kwiifrikhwensi eziphezulu.

Ngokubanzi, olona vavanyo luphezulu lokujikeleza okukhawulezileyo kweebhodi zePCB zeprototyping zinokususela kwiimegahertz ezimbalwa ukuya kwiigigahertz ezininzi, kuxhomekeke kwiinkcukacha zoyilo kunye neemfuno zesicelo.Abavelisi be-PCB abanamava kunye neenjineli kufuneka kudityanwe nabo ukuze kubonwe eyona nto ilungileyo yokukala amaza kwiprojekthi yakho ethile.

Isishwankathelo, ubuninzi be-frequency rated yiparameter ebalulekileyo xa kuqwalaselwa iibhodi ze-PCB zokujika ngokukhawuleza.Imisela i-frequency ephezulu apho isignali inokudluliselwa ngokuthembekileyo ngaphandle kokuphazamiseka okanye ukulahleka komqondiso. Ngokusebenzisa imathiriyeli ye-frequency ephezulu, kusetyenziswa uyilo oluchanekileyo loyilo, ukulawula iimpawu zentambo yothumelo, kunye nokunciphisa uphazamiseko, iinjineli zinokuqinisekisa ukuba iibhodi zePCB ezijika ngokukhawuleza zisebenza ngokuthembeka okuphezulu kwiifrikhwensi ezifunekayo.