Iindaba

Ixesha: 2021-09-02

Isigaba sesiganeko kunye namaza abonakalisiweyo kwindawo enye, i-voltage amplitude ye-voltage amplitude ephezulu i-Vmax, eyenza ii-antinodes; i-incident kunye namaza abonakalisiweyo kwisigaba esichaseneyo xa kuthelekiswa ne-voltage amplitude yendawo iyancipha ibe yi-voltage amplitude encinci i-Vmin, ukwakheka kwe-node. Elinye ixabiso le-amplitude yenqaku ngalinye liphakathi kwee-antinodes kunye ne-node phakathi. Le wave yokwenziwa ibizwa ngokuba yi-row standing. I-SWR yi-standing wave amplitude yoxinzelelo lwesandi esiswini i-Vmax kunye ne-node kwi-ratio ye-amplitude yoxinzelelo lwesandi i-Vmin. Kwityhubhu ye-standing wave, i-VSWR elinganisiweyo, izinto zokufunxa isandi zinokufunyanwa i-reflection coefficient kunye ne-absorption coefficient.

Kwinxibelelwano lwerediyo, ukungafani kwe-antenna impedance kunye ne-feeder okanye i-transmitter antenna impedance ukungafani, amandla aphezulu avelisa ukubonakaliswa okugoqiweyo, kwaye inxalenye engaphambili yokuphazamiseka kwamaza okuma kwenzeka ngokudibana. Ukuze kuchazwe kwaye kulinganiswe iimpawu ze-VSWR zenkqubo ye-antenna, oko kukuthi, i-antenna ye-front wave kunye ne-reflective wave, yaseka ingcamango "ye-SWR",

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

I-coefficient yokubonakalisa K = (Rr) / (R + r)

(U-K lixabiso elibi libonisa ukuba isigaba esichaseneyo )

Apho u-R no-r zi-output impedance kunye ne-input impedance. Xa amaxabiso amabini njenge-impedance, oko kufana ngokugqibeleleyo, i-reflection coefficient K ilingana no-0, i-VSWR yi-1. Le yimeko efanelekileyo, eneneni, ihlala ibonakaliswa, ukuze umlinganiselo wamaza amileyo uhlale ungaphezulu kuno-1.

Ukuhambelana kwe-impedance yenkqubo ye-RF. Ingqwalasela ekhethekileyo kwi-voltage eBo Bida kwiimfuno ezithile, kuba xa usebenzisa uluhlu lwe-broadband frequency lubanzi kakhulu, umlinganiselo wamaza okuma uya kutshintsha ngokwexesha, kwaye kufuneka kwenzeke ukuhambelana kwe-impedance yobubanzi.

Intsingiselo ye-VSWR: I-VSWR lixabiso lenani elimele i-th

Singakwazi nokwenza ngokwezifiso iinxalenye ze-rf passive ngokweemfuno zakho. Ungangena kwiphepha lokwenza ngokwezifiso ukuze unikeze iinkcukacha ozifunayo.
https://www.keenlion.com/customization/

I-Emali:
sales@keenlion.com
tom@keenlion.com