Ngenxa inkqubela iteknoloji elektroniki, ubunzima PCB (ibhodi yesekethe eprintiweyo), umda wesicelo unophuhliso olukhawulezayo. Designers engaged in HF PCB must have relevant basic theoretical knowledge and rich experience in THE manufacture of HF PCB. Ngamanye amagama, zombini ukuzoba okucwangcisiweyo kunye noyilo lwe-PCB kufuneka kuthathelwe ingqalelo kwimeko yokusebenza ephezulu kakhulu, ukuze kuyilwe i-PCB efanelekileyo.

Eli phepha, i-wiring ye-PCB, ipleyiti ye-welding kwaye isebenzise indlela yoyilo lobhedu, okokuqala, kwisiseko se-PCB ye-wiring, i-wiring, intambo yamandla kunye neemfuno zombane zomhlaba ngendlela yephepha lazisa uyilo I-wiring ye-PCB, okwesibini ukusuka kwindawo yokubopha kunye nokuvula, ubungakanani bepad ye-PCB kunye nokuma koyilo kuyilo lomgangatho, iimfuno zenkqubo yokuvelisa i-PCB yaziswa ngoyilo lwe-PCB solder, Okokugqibela, ukusuka kwizakhono zePCB zokutyabeka ubhedu kunye nokuseta kwazisa uyilo lobhedu lwe-PCB, ukulandela okuthe ngqo xiaobian ukuqonda.

Inkcazo ebanzi yendlela yoyilo lwe-PCB ye-wiring, i-welding pad kunye ne-copper coating

Uyilo kweentambo PCB

Iingcingo yimfuneko ngokubanzi yoyilo lwe-hf PCB esekwe kulwakhiwo olufanelekileyo. Ukufakwa kwetafile kubandakanya ukufaka ngaphakathi ngokuzenzekelayo kunye nokufaka izinto ngaphakathi kwikhabhathi. Ngokwesiqhelo, akukhathaliseki nokuba mingaphi imigca yesiginali ekhoyo, iintambo zombane kufuneka zenziwe kule migca yesiginali kuqala. Emva kokugqitywa kweentambo, i-wiring yale migca yesiginali kufuneka ihlolwe ngononophelo kwaye ilungiswe emva kokudlula kwitshekhi, emva koko ezinye iintambo mazifakelwe iintambo ngokuzenzekelayo. Oko kukuthi, indibaniselwano yokubamba ngesandla kunye nokuzenzekelayo kusetyenziswa ukugqibezela iingcingo zePCB.

Le miba ilandelayo kufuneka ihlawulwe ngokukodwa ngexesha lokufakwa kweengcingo ze-hf PCB.

1. Ulwalathiso lweentambo

Ukuncitshiswa kweentambo zesekethe kungcono ukwamkela umgca opheleleyo othe ngqo ngokolwalathiso lomqondiso, kwaye i-45 ° yomgca owaphukileyo okanye ijika le-arc inokusetyenziselwa ukugqibezela indawo yokujika, ukwenzela ukunciphisa ukukhutshwa kwangaphandle kunye nokudibana ngokuhlangeneyo okuphezulu Imiqondiso yokuhamba rhoqo. Ukuncitshiswa kweentambo zombane ezihamba ngesantya esiphezulu kufuneka kubemfutshane ngangoko kunokwenzeka. Ngokwamaxesha okusebenza kwesekethe, ubude bomgca wesiginali kufuneka bukhethwe ngokufanelekileyo, ukunciphisa iiparameter zokuhambisa kunye nokunciphisa ilahleko yomqondiso. Xa usenza iiphaneli eziphindwe kabini, kungcono ukuhamba ngeendlela ezimbini ezikufutshane, ngokuthe nkqo okanye egobile ukudibana. Kulumkele ukufana omnye nomnye, okunciphisa ukuphazamiseka kunye nokudibanisa i-parasitic.

Imigca yesiginali esiphakamileyo kunye nemigca yesiginali esisezantsi kufuneka yahlulwe kangangoko kunokwenzeka, kwaye kufuneka kuthathwe amanyathelo okhuselo xa kukho imfuneko ukunqanda uphazamiseko. Ukufakelwa kwesiginali ukufumana ubuthathaka, kulula ukuphazanyiswa ziimpawu zangaphandle, ungasebenzisa ucingo lomhlaba ukwenza ukhuselo ukuze urhangqwe okanye wenze umsebenzi olungileyo wokukhusela isinxibelelanisi samaza aphakamileyo. Parallel wiring should be avoided on the same level, otherwise distributed parameters will be introduced, which will affect the circuit. Ukuba akunakuphepheka, isinyibilikisi sobhedu esingaphantsi sinokwaziswa phakathi kwemigca emibini efanayo ukwenza umgca wodwa.

Kwisekethe yedijithali, kwimigca yomahluko owahlukileyo, kufanele ukuba ibe ngababini, kangangoko kunokwenzeka ukubenza bahambelane, basondele kwezinye, kwaye ubude abuhlukanga kangako.

2. Uhlobo lweentambo zombane

Kwi-wiring ye-PCB, ubuncinci bobubanzi be-wiring bugqitywa ngamandla okubambelela phakathi kocingo kunye ne-insulator substrate kunye namandla okuhamba ngoku ngocingo. Xa ubukhulu befoyile yobhedu ingu-0.05mm kwaye ububanzi buyi-1mm-1.5mm, i-2A yangoku inokudlula. Iqondo lobushushu akufuneki libe ngaphezulu kwe-3 ℃. Ngaphandle kweentambo ezithile ezikhethekileyo, ububanzi bezinye iintambo kumaleko ofanayo kufuneka zingqinelane ngokusemandleni. Kwisekethe ephezulu yokuhambahamba, ukushiyeka kweentambo kuyakuchaphazela ubungakanani bokubekwa kwamandla kunye nokuhanjiswa, kwaye ke oko kuchaphazele ukulahleka komqondiso, uzinzo kwisekethe kunye nokuphazamiseka kwempawu. Kwisantya esiphezulu sokutshintsha isekethe, ukushenxiswa kweengcingo kuya kuchaphazela ixesha lokuhambisa umqondiso kunye nomgangatho wefomathi. Ke ngoko, ubuncinci besithuba se-wiring kufuneka sibengaphezulu okanye silingane no-0.5 mm. Kungcono ukusebenzisa imigca ebanzi ye-wiring ye-PCB xa kunokwenzeka.

Kufuneka kubekho umgama othile phakathi kweengcingo eziprintiweyo kunye nohlangothi lwe-PCB (engekho ngaphantsi kobunzima beplate), ekungekho lula ukuyifaka kunye nokuchaneka, kodwa kunye nokuphucula ukusebenza kwe-insulation.

Xa ii-wiring zinokudityaniswa kuphela kwisangqa esikhulu somgca, kuya kufuneka sisebenzise umgca wokubhabha, oko kukuthi, unxibelelene ngqo nomgca omfutshane ukunciphisa uphazamiseko oluziswa ziintambo zomgama omde.

Isekethe equlathe izinto ezibuthathaka ngemagneti inovakalelo kumhlaba ojikeleze umbane, ngelixa ukugoba kweentambo zesekethe ephezulu kunesibane esilula ukubengezela ngombane. Ukuba izinto ezibucayi ngemagnethi zibekwe kwi-PCB, kufuneka iqinisekise ukuba kukho umgama othile phakathi kwekona yeentambo nayo.

Akukho crossover ivumelekile kwinqanaba elifanayo leentambo. Kumgca ongawela, ungasebenzisa “ukubhola” ngeendlela “zenxeba” ukusombulula, vumela isikhokelo esithile esivela kolunye uxhathiso, amandla, uvavanyo, njl njl. ilothe ethile enokuwela “inxeba” elidlulileyo. Kwiimeko ezizodwa apho isekethe inzima kakhulu, ukwenza lula uyilo, ikwavumelekile ukusombulula ingxaki ye-crossover ngocingo.

Xa isekethe ephezulu yokujikeleza isebenza kumaza aphezulu, ukungqinelana kwe-impedance kunye nefuthe le-eriyali lokucoca iintambo kufuneka liqwalaselwe.

Ngenxa yokuba umthengi ekugqibeleni wasitshintsha isivumelwano sangaphambili kwaye wafuna inkcazo yomdibaniso kunye nokubekwa njengoko kuchaziwe kubo, kuye kwafuneka batshintshe ubeko kumzobo ongasekunene. Ngapha koko, yonke i-PCB yi-9cm x 6cm kuphela. Kunzima ukutshintsha ubume bebhodi ngokweemfuno zabathengi, ke eyona ndawo iphambili yebhodi ayitshintshwanga ekugqibeleni, kodwa izinto ezijikelezayo zatshintshwa ngokufanelekileyo, ikakhulu isikhundla sezinxibelelanisi ezibini kunye nenkcazo izikhonkwane zalungiswa.

Kodwa ubeko olutsha ngokucacileyo lubangele ingxaki emgceni, umgca wokuqala ogudileyo waba mdaka, ubude bomgca bunyukile, kodwa kwafuneka usebenzise imingxunya emininzi, ubunzima bomgca bonyuke kakhulu.

Inkcazo ebanzi yendlela yoyilo lwe-PCB ye-wiring, i-welding pad kunye ne-copper coating

It is clear from this example that layout differences can have an impact on PCB design.

Inkcazo ebanzi yendlela yoyilo lwe-PCB ye-wiring, i-welding pad kunye ne-copper coating

3. Iimfuno zeentambo zombane kunye neentambo zomhlaba

Yandisa ububanzi bentambo ngokwendlela yokusebenza ekhoyo ngoku. I-HF PCB kufuneka yamkele indawo enkulu yocingo lomhlaba kunye nobeko kumda we-PCB kangangoko kunokwenzeka, enokunciphisa ukuphazamiseka kwempawu zangaphandle kwisekethe; Kwangelo xesha, ucingo olusezantsi lwe-PCB lunokunxibelelana kakuhle neqokobhe, ukuze amandla ombane we-PCB asondele kumbane wehlabathi. Imowudi yokomisa umhlaba kufuneka ikhethwe ngokwemeko eyiyo. Ukwahluka kwisekethe yamaxesha asezantsi, intambo yomhlaba yesekethe ephezulu yokuhamba ngesantya kufuneka ibekufutshane okanye kumhlaba onamanqaku amaninzi. Intambo yokuyekisa kufuneka ibe mfutshane kwaye inyibilike ukunciphisa ukungqinelana komhlaba, kwaye imeko evumelekileyo yangoku kufuneka ibe zizihlandlo ezithathu zangoku. Isithethi sokucoca ucingo kufuneka sidityaniswe nenqanaba lesiseko sokukhupha amandla epcb yamandla, musa ukuzinza ngokungafanelekanga.

Kwinkqubo yokufaka iintambo kusafuneka ukuba ngexesha kushiyeke iingcingo ezimbalwa ngokufanelekileyo, hleze uphinde uphinde ubambe iingcingo amaxesha amaninzi. Ukuyitshixa, sebenzisa umyalelo we-EditselectNet ukukhetha ukuTshixa kwiipropathi ezenziwe ngocingo.