Mkulu pafupipafupi PCB
Mkulu pafupipafupi PCB ndi mtundu wa PCB yomwe imagwiritsidwa ntchito popititsa patsogolo mautumiki osiyanasiyana monga mafoni, ma microwave, ma wayilesi komanso magwiridwe antchito othamanga kwambiri.
Ma High Frequency board amabwera ndi ma laminates othamanga kwambiri ndizovuta kuzipanga chifukwa amafunikira kukhalabe ndi kutentha kwa ntchitoyo, potengera kuzindikira kwa chizindikirocho.
Zipangizo zapadera zimagwiritsidwa ntchito kuti zifikire pafupipafupi zoperekedwa ndi High Frequency PCB.
Makhalidwe a bolodi lalitali kwambiri amatha kuwonetsa kugwiranso ntchito kwa chizindikirocho, momwemonso kusintha kulikonse pamtengo wa Er wa zinthu zomwe agwiritsa ntchito kumatha kukhudza kutha kwa bolodi.
Ambiri mwa akatswiri amakonda ma roger ma dielectric chifukwa amakhala otsika mtengo, amakhala ndi mtengo wotsika wa DK ndi DF, amachepetsa kutayika kwa siginecha ndipo akuwoneka kuti ndioyenera kupanga zabodza komanso kutengera ntchito.
Teflon ndi chinthu china chofala chomwe chimagwiritsidwa ntchito popanga ma PCB apamwamba kwambiri, omwe amabwera pafupipafupi a 5GHz. Malinga ndi DK, DF ndi mayamwidwe amadzi, Teflon ndiye wabwino kwambiri, koma wokwera mtengo kuposa FR4.
Ngati mapulojekiti anu amafunikira pafupipafupi kuposa 10GHz wokhala ndi mtundu wapamwamba komanso chizindikiro chokhazikika, ndiye kuti Teflon ndiye chisankho chabwino kwambiri.
Zizindikiro zamafupipafupi zimakhala pachiwopsezo cha phokoso ndipo zimabwera ndi kulolerana kowopsa kwama impedance poyerekeza ndi mabatani azizolowezi.