Oge: 2021-09-02
Oge nke ihe merenụ na ebili mmiri gosipụtara n'otu ebe ahụ, oke voltaji nke oke voltaji kachasị elu Vmax, na-emepụta antinodes; ebili mmiri merenụ na ebili mmiri gosipụtara n'usoro dị iche ma e jiri ya tụnyere oke voltaji mpaghara a na-ebelata ruo na oke voltaji kacha nta Vmin, nhazi nke node ahụ. Uru oke voltaji ndị ọzọ nke isi ihe ọ bụla dị n'etiti antinodes na node dị n'etiti. Ebili mmiri a na-akpọ ahịrị kwụ ọtọ. SWR bụ oke ebili mmiri kwụ ọtọ nke nrụgide ụda na afọ Vmax na node na oke nke oke nke nrụgide ụda Vmin. Na tube ebili mmiri kwụ ọtọ, VSWR a tụrụ, enwere ike nweta ihe nnabata ụda na-egosipụta na oke absorption.
N'ihe gbasara nkwukọrịta redio, enweghị njikọ nke antenna na onye na-enye nri ma ọ bụ onye na-ebufe antenna na-adakọghị, ike ugboro ugboro dị elu ga-emepụta ntụgharị uche apịaji, akụkụ ihu nke nnyonye anya na-eguzo na-emekwa njikọ. Iji chọpụta ma tụọ njirimara VSWR nke sistemụ antenna, ya bụ, antenna nke ebili mmiri n'ihu na ebili mmiri a na-egosipụta, o guzobere echiche "SWR".
SWR = R / r = (1 + K) / (1-K)
Ọnụọgụ ntụgharị uche K = (Rr) / (R + r)
(K bụ uru na-adịghị mma na-egosi na usoro dị iche)
Ebe R na r bụ impedance mmepụta na impedance ntinye. Mgbe uru abụọ dị ka impedance, nke ahụ dabara nke ọma, ihe ntụgharị uche K hà nhata 0, VSWR bụ 1. Nke a bụ ọnọdụ zuru oke, n'eziokwu, a na-egosipụta ya mgbe niile, nke mere na oke ebili mmiri na-adịgide karịa 1 mgbe niile.
Ndakọrịta nke sistemu RF impedance. Nlebara anya pụrụ iche na voltaji dị na Bo Bida na ihe achọrọ ụfọdụ, n'ihi na mgbe ị na-eji oke ugboro broadband sara mbara nke ukwuu, oke ebili mmiri na-eguzo ga-agbanwe ka ugboro ugboro, kwesịrị ime ka o kwe omume na nhazi impedance dị iche iche.
Ihe VSWR pụtara: VSWR bụ uru ọnụọgụgụ nke na-anọchite anya th
Anyị nwekwara ike hazie ihe ndị dị na rf passive dịka ihe ị chọrọ si dị. Ị nwere ike itinye ibe nhazi iji nye nkọwapụta ịchọrọ.
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Oge ozi: Nọvemba-18-2021
