Waveguide (kapena wowongolera) ndi chingwe chopanda kanthu cha tubular chopangidwa ndi kondakita wabwino. Ndi chida chofalitsira mphamvu zamagetsi (makamaka kufalitsa mafunde a electromagnetic okhala ndi kutalika kwa mafunde motengera ma centimita) Zida zodziwika bwino (makamaka kutumizira mafunde a electromagnetic okhala ndi kutalika kwa mafunde motengera ma centimita).
Kusankhidwa kwa makulidwe a rectangular waveguide kuyenera kuganizira izi:
1. Waveguide bandwidth vuto
Kuwonetsetsa kuti mafunde a electromagnetic mkati mwamtundu womwe wapatsidwa amatha kufalikira munjira imodzi ya TE10 mu waveguide, mitundu ina yapamwamba iyenera kudulidwa, kenako b.
2. Waveguide mphamvu mphamvu vuto
Pofalitsa mphamvu yofunikira, waveguide sangathe kusweka. Kuchulukitsa moyenera b kumatha kuwonjezera mphamvu yamagetsi, kotero b iyenera kukhala yayikulu momwe mungathere.
3. Kuchepetsa kwa waveguide
Pambuyo pa microwave kudutsa mu waveguide, tikuyembekeza kuti mphamvuyo sidzatayika kwambiri. Kuchulukitsa b kumatha kupangitsa kuti kuchepetsako kuchepe, chifukwa chake b iyenera kukhala yayikulu momwe mungathere.
Kutengera zinthu zokopa, kukula kwa ma waveguide amakona anayi nthawi zambiri kumasankhidwa motere:
a=0.7λ, λ ndi kutalika kwa kutalika kwa TE10
b=(0.4-0.5)a
Ma waveguide ambiri amakona anayi amapangidwa ndi chiŵerengero cha: b = 2: 1, chomwe chimadziwika kuti ma waveguides, kotero kuti chiwerengero chachikulu cha bandwidth cha 2: 1 chikhoza kutheka, ndiko kuti, chiŵerengero cha maulendo apamwamba kwambiri mpaka otsika kwambiri. pafupipafupi ndi 2:1. Pofuna kupititsa patsogolo mphamvu yamagetsi, ma waveguide omwe ali ndi b> a / 2 amatchedwa high waveguide; kuti muchepetse voliyumu ndi kulemera kwake, ma waveguide okhala ndi b
Chiŵerengero chapamwamba cha bandwidth chomwe chiwongolero chozungulira chikhoza kufalitsa ndi 1.3601: 1, ndiko kuti, chiwerengero cha maulendo apamwamba kwambiri amtundu umodzi mpaka otsika kwambiri odulidwa ndi 1.3601: 1. Mafupipafupi ogwiritsira ntchito ma frequency a rectangular waveguide ndi ma frequency 30% pamwamba pa cutoff frequency ndi 5% pansipa yachiwiri yapamwamba kwambiri cutoff frequency. Makhalidwe ovomerezekawa amalepheretsa kubalalitsidwa pafupipafupi pama frequency otsika komanso magwiridwe antchito a ma multimode pama frequency apamwamba.
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Nthawi yotumiza: Jun-12-2023
