Amakuru

Igihe: 2021-09-02

Icyiciro cyibyabaye kandi kigaragaza umuraba ahantu hamwe, voltage amplitude yumubare ntarengwa wa voltage amplitude sum Vmax, ikora antinode; ibyabaye kandi byerekanwe kumurongo mubice bitandukanye ugereranije na voltage yaho ya amplitude igabanuka kugeza kuri voltage ntoya ya amplitude Vmin, gushiraho node. Ubundi amplitude agaciro ka buri ngingo iri hagati ya antinode na node hagati. Iyi ntera ya sintetike yitwa umurongo uhagaze. SWR ni amplitude ihagaze yumuvuduko wijwi ryinda yinda Vmax na node ku kigereranyo cya amplitude yumuvuduko wijwi Vmin. Mu muyoboro uhagaze, wapimwe VSWR, ibikoresho byo kwinjiza amajwi birashobora kuboneka coefficient de coiffe na coeffisente.

Mu itumanaho rya radiyo, antenne impedance idahuye na federasiyo cyangwa transmitter antenna impedance idahuye, ingufu zumuvuduko mwinshi zizatanga ibitekerezo bikubye, kandi igice cyimbere cyumuvuduko uhagaze kibaho. Mu rwego rwo kuranga no gupima ibiranga VSWR biranga sisitemu ya antenne, ni ukuvuga antenne yumuvuduko wimbere hamwe nu muhengeri ugaragara ni, yashyizeho igitekerezo cya "SWR",

SWR = R / r = (1 + K) / (1-K)

Coefficient K = (Rr) / (R + r)

(K nigiciro kibi cyerekana ko ikinyuranyo)

Aho R na r nibisohoka impedance hamwe ninjiza yinjira. Iyo indangagaciro zibiri nka impedance, zihuye neza, coefficente yerekana K ihwanye na 0, VSWR ni 1. Ibi nibintu byiza, mubyukuri, burigihe burigihe bigaragarira, kuburyo igipimo cyumurongo uhagaze gihora hejuru ya 1.

Sisitemu ya RF ihuza inzitizi. By'umwihariko kwitondera voltage muri Bo Bida kubisabwa bimwe, kuko mugihe ukoresheje umurongo mugari wumurongo mugari ni mugari cyane, igipimo cyumurongo uhagaze kizahinduka hamwe numurongo, bigomba gutuma bishoboka intera nini ihuza.

VSWR bisobanura: VSWR nigiciro cyumubare ugereranya th

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