Nūhou

Manawa: 2021-09-02

ʻO ka pae o nā nalu i hōʻike ʻia a me nā nalu i hoʻohuli ʻia ma kahi like, ʻo ka amplitude voltage o ka amplitude voltage kiʻekiʻe loa o Vmax, e hana ana i nā antinodes; ʻo ka emi ʻana o nā nalu i hōʻike ʻia a me nā nalu i hōʻike ʻia ma kahi pae ʻē aʻe e pili ana i ka amplitude voltage kūloko i ka amplitude voltage liʻiliʻi loa Vmin, e hoʻokumu ai i ke kikowaena. ʻO ka waiwai amplitude ʻē aʻe o kēlā me kēia kiko ma waena o nā antinodes a me ke kikowaena ma waena. Ua kapa ʻia kēia nalu synthetic he lālani kū. ʻO SWR ka amplitude nalu kū o ke kaomi leo ma ka ʻōpū Vmax a me ke kikowaena ma ka lakio o ka amplitude o ke kaomi leo Vmin. I loko o ka paipu nalu kū, i ana ʻia ʻo VSWR, hiki ke loaʻa ka coefficient reflection a me ka coefficient absorption mai ka mea hoʻopili leo.

I ke kamaʻilio lekiō, ʻo ka antenna impedance mismatch me ka mea hānai a i ʻole ka transmitter antenna impedance mismatch, e hana ka ikehu alapine kiʻekiʻe i nā noʻonoʻo i pelu ʻia, a ʻo ka ʻaoʻao mua o ka nalu kū e hana i ka confluence. I mea e wehewehe ai a ana i nā ʻano VSWR o ka ʻōnaehana antenna, ʻo ia hoʻi, ʻo ka antenna o ka nalu mua a me ka nalu i hōʻike ʻia, ua hoʻokumu ʻia ka manaʻo "SWR".

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

Koena hoʻohālikelike K = (Rr) / (R + r)

(ʻO K kahi waiwai maikaʻi ʻole e hōʻike ana i ka pae ʻē aʻe)

Ma hea ʻo R a me r ka impedance hoʻopuka a me ka impedance hoʻokomo. Ke kūlike nā waiwai ʻelua e like me ka impedance, ʻo ia hoʻi, ua like ka coefficient reflection K me 0, ʻo VSWR he 1. He kūlana kūpono kēia, ʻo ka ʻoiaʻiʻo, aia mau ka reflection, no laila ʻoi aku ka nui o ka lakio nalu kū ma mua o 1.

Hoʻohālikelike impedance ʻōnaehana RF. Pono ka nānā kūikawā i ke anakahi uila ma Bo Bida i kekahi mau koi, no ka mea, i ka wā e hoʻohana ai ʻoe i ka laulā alapine broadband he ākea loa, e loli ka lakio nalu kū me ke alapine, pono e hiki ai ke hoʻohālikelike impedance ākea.

ʻO ke ʻano o VSWR: He waiwai helu ʻo VSWR e hōʻike ana i ka

Hiki iā mākou ke hoʻopilikino i nā ʻāpana passive rf e like me kāu mau koi. Hiki iā ʻoe ke komo i ka ʻaoʻao hoʻopilikino e hāʻawi i nā kikoʻī āu e pono ai.
https://www.keenlion.com/customizer/

ʻEmali:
sales@keenlion.com
tom@keenlion.com