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Nguva : 2021-09-02

Chikamu chechiitiko uye mafungu airatidza nzvimbo imwechete, iyo voltage amplitude yeakanyanya voltage amplitude sum Vmax, achigadzira antinodes; chiitiko uye inoratidzwa mafungu mune yakatarisana chikamu hukama nenharaunda voltage amplitude yakaderedzwa kusvika padiki voltage amplitude Vmin, kuumbwa kwenode. Imwe amplitude kukosha kweimwe neimwe poindi iri pakati pemaantinode uye node pakati. Synthetic wave iyi inonzi row standing. SWR ndiyo yakamira wave amplitude yekudzvinyirirwa kweruzha padumbu Vmax uye node pareshiyo yeamplitude yekumanikidza kwenzwi Vmin. Mune yakamira wave chubhu, iyo yakayerwa VSWR, iyo ruzha inonyudza zvinhu inogona kuwanikwa yekuratidzira coefficient uye absorption coefficient.

Mukutaura kweredhiyo, iyo antenna impedance kusawirirana neanodyisa kana iyo transmitter antenna impedance kusawirirana, yakakwira-frequency simba inoburitsa maratidziro akapetwa, uye chikamu chekumberi chekukanganiswa kwemafungu kunoitika. Kuti utarise uye uyere hunhu hweVSWR hweantenna system, kureva kuti, antenna yekumberi uye inoratidzwa wave, yakamisa iyo "SWR" pfungwa,

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

Reflection coefficient K = (Rr) / (R + r)

(K kukosha kwakashata kunoratidza kuti chikamu chakapesana)

Imo R uye r ndiyo inobuda impedance uye iyo impedance yekupinza. Kana iyo miviri yakakosha seiyo impedance, iyo inofananidzwa zvakakwana, iyo yekuratidzira coefficient K yakaenzana ne0, VSWR iri 1. Iyi ndiyo yakanaka mamiriro, chokwadi, inogara ichiratidzwa, kuitira kuti kumira wave ratio inogara yakakura kupfuura 1.

RF system impedance inoenderana. Kunyanya kutarisisa kune voltage muBo Bida kune zvimwe zvinodiwa, nekuti kana iwe ukashandisa Broadband frequency renji yakafara kwazvo, kumira wave reshiyo ichachinja ne frequency, inofanirwa kuita kuti kugoneke kwakasiyana siyana impedance inoenderana.

VSWR zvinoreva: VSWR inhamba yenhamba inomiririra th

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