1. Antenna riba
Eriyariba tana nufin rabon ƙarfin ƙarfin hasken lantarki na eriya a cikin takamaiman takamaiman jagora zuwa ƙarfin ƙarfin hasken wuta na eriyar tunani (yawanci madaidaicin tushen radiyo) a ƙarfin shigarwa iri ɗaya. Ma'aunin da ke wakiltar ribar eriya sune dBd da dBi.
Ana iya fahimtar ma'anar jiki na riba kamar haka: don samar da sigina na wani girman a wani matsayi a wani nisa, idan an yi amfani da madaidaicin madaidaicin ma'ana a matsayin eriya mai watsawa, ana buƙatar ƙarfin shigarwa na 100W, yayin da ake amfani da eriyar shugabanci tare da riba na G = 13dB (sau 20) azaman eriya mai watsawa, ƙarfin shigarwar = 100W kawai. A wasu kalmomi, ribar eriya, dangane da tasirinsa na radiation a cikin mafi girman hanyar radiation, shine yawan ƙarfin shigar da aka ƙara idan aka kwatanta da madaidaicin madaidaicin manufa.
Ana amfani da ribar eriya don auna ƙarfin eriya don aikawa da karɓar sigina a cikin takamaiman shugabanci kuma yana ɗaya daga cikin mahimman sigogi don zaɓar eriya. Riba yana da alaƙa da tsarin eriya. Matsakaicin babban lobe na ƙirar da ƙarami na gefen gefe, mafi girman riba. Ana nuna alaƙa tsakanin babban faɗin lobe da ribar eriya a hoto 1-1.
Hoto na 1-1
A karkashin yanayi guda, mafi girman riba, mafi nisa da raƙuman rediyo. Koyaya, a ainihin aiwatarwa, ya kamata a zaɓi ribar eriya ta hanyar da ta dace dangane da madaidaicin katako da yanki mai ɗaukar hoto. Misali, lokacin da nisan ɗaukar hoto ya kusa, don tabbatar da tasirin ɗaukar hoto na wurin kusa, yakamata a zaɓi eriya mai ƙarancin riba tare da lobe mai faɗi a tsaye.
2. Abubuwan da ke da alaƙa
dBd: dangane da ribar eriya mai ma'ana,
dBi: dangane da ribar eriya tushen ma'ana, radiation a duk kwatance iri ɗaya ne. dBi=dBd+2.15
kusurwar Lobe: kusurwar da aka kafa ta 3dB a ƙarƙashin babban lobe kololuwa a cikin ƙirar eriya, da fatan za a koma zuwa nisa lobe don cikakkun bayanai, tushen madaidaicin radiyo: yana nufin ingantacciyar eriya ta isotropic, wato, tushen haske mai sauƙi, tare da halayen radiation iri ɗaya a duk kwatance a sararin samaniya.
3. Tsarin lissafi
Ribar Eriya = 10lg (yawan ƙarfin wutar lantarki na eriya / yawan ƙarfin hasken wutar lantarki)
Don ƙarin koyo game da eriya, da fatan za a ziyarci:
Lokacin aikawa: Dec-06-2024
