TheSefa ya Band Stop, (BSF) ndi mtundu wina wamagawo osankha pafupipafupi omwe amagwira ntchito mosiyana ndi Sefa ya Band Pass yomwe tidayang'anapo kale. Zosefera za band stop, zomwe zimadziwikanso kuti band reject frequency, zimadutsa ma frequency onse kupatula omwe ali mkati mwa bandi yoyimitsidwa yomwe imachepetsedwa kwambiri.
Ngati gulu loyimitsa ili ndi lopapatiza kwambiri komanso locheperako pama hertz ochepa, ndiye kuti fyuluta yoyimitsa band imatchedwa fyuluta ya notch, chifukwa kuyankha kwake pafupipafupi kumawonetsa kuzama komwe kumakhala ndi kusankha kwakukulu (kupindika kotsetsereka) osati gulu lotambalala.
Komanso, monga fyuluta ya band pass, fyuluta yoyimitsa bandi (kukana gulu kapena notch) ndi fyuluta yachiwiri (yamitundu iwiri) yokhala ndi ma frequency awiri oduka, omwe amadziwika kuti -3dB kapena theka-power point omwe amapanga bandiwidth yotalikirapo pakati pa mfundo ziwirizi -3dB.
Kenako ntchito ya band stop fyuluta imadutsanso ma frequency onsewo kuchokera ku zero (DC) mpaka malo ake oyamba (otsika) odulira ƒL, ndikudutsa ma frequency onsewo pamwamba pa ma frequency ake achiwiri (apamwamba) odulidwa ƒH, koma kuletsa kapena kukana ma frequency onsewo pakati. Ndiye bandwidth yosefera, BW imatanthauzidwa ngati: (ƒH - ƒL).
Chifukwa chake pazosefera za band-band stop band, zosefera zenizeni zoyimitsa zimagona pakati pa malo ake otsika ndi apamwamba -3dB momwe amachepetsera, kapena amakana ma frequency aliwonse pakati pa ma frequency awiriwa. Kuyankha pafupipafupi kwa fyuluta yabwino yoyimitsa band kumaperekedwa.
Zabwinoband stop fyulutaikanakhala ndi kutsika kopanda malire mu gulu lake loyimitsa ndi zero attenuation mu gulu lililonse la pass. Kusintha pakati pa magulu awiri a pass band ndi stop band kudzakhala yoyima (khoma la njerwa). Pali njira zingapo zomwe tingapangire "Band Stop Filter", ndipo zonse zimakwaniritsa cholinga chimodzi.
Mayunitsi amabwera muyezo wokhala ndi zolumikizira za SMA kapena N zazikazi, kapena 2.92mm, 2.40mm, ndi zolumikizira za 1.85mm pazigawo zapamwamba kwambiri.
Tikhozanso makonda aSefa ya Band Stopmalinga ndi zomwe mukufuna. Mutha kulowa patsamba losintha kuti mupereke zomwe mukufuna.
Nthawi yotumiza: Aug-20-2022
