Amakuru

Isaha: 2021-09-02

Icyiciro cy'ibyabaye n'imiraba yagaragaye ahantu hamwe, uburebure bwa voltage bw'umuvuduko ntarengwa wa voltage Vmax, bigakora antinodes; imiterere n'imiraba yagaragaye mu cyiciro gitandukanye ugereranyije n'uburebure bwa voltage yo mu gace igabanuka ikagera kuri uburebure bwa voltage Vmin, imiterere y'agace. Ubundi gaciro bwa amplitude ya buri ngingo ni hagati ya antinodes n'agace hagati. Uyu muvuduko w'ubukorano witwa row standing. SWR ni uburebure bwa wave standing bw'umuvuduko w'ijwi ku nda Vmax n'agace ku gipimo cy'umuvuduko w'ijwi Vmin. Mu muyoboro w'umuvuduko uhagaze, VSWR yapimwe, ibikoresho byo kwinjiza ijwi bishobora kuboneka ubwiza bwa reflection na ubwiza bwa amplitude.

Mu itumanaho rya radiyo, impedance ya antene idahuye n'icyuma gitanga cyangwa impedance ya antene yohereza, ingufu za frequency yo hejuru zizatuma reflection zipfunyika, kandi igice cy'imbere cy'umuraba uhagaze kibaho ihuriro. Kugira ngo hamenyekane kandi hapimwe imiterere ya VSWR ya sisitemu ya antene, ni ukuvuga antene y'umuraba w'imbere n'umuraba w'inyuma, byashyizeho igitekerezo cya "SWR",

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

Igipimo cyo kugarura K = (Rr) / (R + r)

(K ni agaciro ka hasi kerekana ko icyiciro gitandukanye)

Aho R na r ari impedance y'umusaruro n'impedance y'inyongera. Iyo agaciro kabiri nka impedance, iyo gahuye neza, coefficient yo kugarura K ingana na 0, VSWR ni 1. Iki ni ikibazo cyiza, mu by'ukuri, gihora kigaragara, ku buryo igipimo cy'umuraba uhagaze gihora kiruta 1.

Guhuza impedance ya sisitemu ya RF. Kwita cyane ku muvuduko wa voltage muri Bo Bida ku bisabwa bimwe na bimwe, kuko iyo ukoresheje umurongo wa interineti ni munini cyane, igipimo cy'umuvuduko uhagaze kizahinduka uko inshuro zigenda zihinduka, bityo bikaba byatuma habaho guhuza impedance yagutse.

VSWR isobanura: VSWR ni agaciro k'imibare kagaragaza

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