Rf and microwave PCB sekuneminyaka eminingana futhi zisetshenziswa kakhulu embonini ye-elekthronikhi. Zithandwa kakhulu futhi zenzelwe ukusebenza ngamasiginali ku-MHZ kuya kububanzi bemvamisa ye-gigahertz. Lawa ma-PCBS alungile uma kukhulunywa ngezinhlelo zokusebenza zenethiwekhi nezokuxhumana. Kunezizathu eziningi zokuthi kungani abakhiqizi be-PCB bancoma ama-RF namabhodi ama-microwave wezinhlelo zokusebenza zokuxhumana. Ngabe ufuna ukwazi ukuthi ziyini? Lo mbhalo ukhuluma ngodaba olufanayo.

Sibutsetelo se-RF ne-microwave PCB

Imvamisa, ama-RF namabhodi ama-microwave aklanyelwe izinhlelo zokusebenza maphakathi nobubanzi bemvamisa ephezulu noma ngaphezulu kwe-100 MHz. Lawa mabhodi kunzima ukuwaklama ngenxa yezinkinga zokuphatha ezisukela ekuzweleni kwesiginali nasekulawuleni izici zokudlulisa ezishisayo. Kodwa-ke, lobu bunzima abukunciphisi ukubaluleka kwabo. Ukusetshenziswa kwezinto ezinempahla enjenge-dielectric low engapheli, i-coefficient ephezulu yokwanda okushisayo (CTE) nokulahleka okuphansi kwe-Angle tangent kusiza ukwenza lula inqubo yokwakha. Izinto ze-PCB ezivame ukusetshenziselwa ukwakha i-RF ne-microwave PCBS zingama-hydrocarbon agcwele i-ceramic, i-PTFE enezintambo ezilukiwe noma ze-microglass, i-FEP, i-LCP, i-Rogers RO laminates, ukusebenza okuphezulu kwe-FR-4, njll.

Izinzuzo ezahlukahlukene ze-RF ne-microwave PCBS

I-Rf ne-microwave PCBS inikela ngezinzuzo eziningi ezizuzisayo. Ngakho-ke ake sibabheke bonke.

Izinto ezinokuphansi kwe-CTE zisiza izakhiwo ze-PCB zihlale zizinzile emazingeni okushisa aphezulu. Ngaphezu kwalokho, lezi zinto zenza ukuthi ama-multilayers alingane kalula.

Ngenxa yokusetshenziswa kwezinto eziphansi ze-CTE, onjiniyela be-PCB bangavumelanisa kalula izingqimba zamapuleti amaningi zibe yizakhiwo eziyinkimbinkimbi.

Izindleko zokuhlangana ze-RF kanye ne-microwave PCBS zingancishiswa ngesakhiwo sesitaki semigqa eminingi. Lesi sakhiwo sinikela futhi ekusebenzeni okuhle kwe-PCB.

I-Stable Er ne-low hasara tangent yenza ukuhanjiswa okusheshayo kwamasiginali wemvamisa ephezulu ngalezi PCBS. Ngaphezu kwalokho, impedance iphansi phakathi nalokhu kudluliswa.

Onjiniyela be-PCB bangabeka izingxenye ze-pitch kahle ebhodini, okusiza ukufeza imiklamo eyinkimbinkimbi.

Ngakho-ke, lezi zinzuzo zenza i-RF ne-microwave PCBS zilungele izinhlelo zokusebenza ezahlukahlukene kufaka phakathi ukuhanjiswa okungenantambo nezinye izinhlelo zokuxhumana ngamakhompyutha.