Chitsogozo cha mafunde (kapena chitsogozo cha mafunde) ndi chingwe cholumikizira cha thovu chopanda kanthu chopangidwa ndi kondakitala wabwino. Ndi chida chofalitsira mphamvu yamagetsi (makamaka kutumiza mafunde amagetsi okhala ndi mafunde ofanana ndi masentimita) Zida zodziwika bwino (makamaka kutumiza mafunde amagetsi okhala ndi mafunde ofanana ndi masentimita).
Kusankha kukula kwa mafunde a rectangular kuyenera kuganizira zinthu zotsatirazi:
1. Vuto la bandwidth ya Waveguide
Kuti muwonetsetse kuti mafunde amagetsi mkati mwa ma frequency range operekedwa amatha kufalikira mu TE10 mode imodzi mu waveguide, ma mode ena apamwamba ayenera kudulidwa, kenako b
2. Vuto la mphamvu ya Waveguide
Pofalitsa mphamvu yofunikira, waveguide singathe kusweka. Kuonjezera bwino b kungapangitse mphamvu kuwonjezereka, kotero b iyenera kukhala yayikulu momwe ingathere.
3. Kuchepetsa mphamvu ya waveguide
Maikulowevu akadutsa mu waveguide, akuyembekezeka kuti mphamvu sidzatayika kwambiri. Kuonjezera b kungapangitse kuti attenuation ikhale yochepa, kotero b iyenera kukhala yayikulu momwe ingathere.
Poganizira zinthu zokongola, kukula kwa guide ya mafunde amakona anayi nthawi zambiri kumasankhidwa motere:
a=0.7λ, λ ndi kutalika kwa nthawi yodulidwa ya TE10
b=(0.4-0.5)a
Ma waveguides ambiri a rectangular amapangidwa ndi aspect ratio ya a:b=2:1, yomwe imadziwika kuti standard waveguides, kotero kuti bandwidth ratio yapamwamba kwambiri ya 2:1 ikhoza kupezeka, ndiko kuti, chiŵerengero cha ma frequency apamwamba kwambiri mpaka ma cutoff frequency otsika kwambiri ndi 2:1. Pofuna kukweza mphamvu yamagetsi, waveguides yokhala ndi b>a/2 imatchedwa high waveguide; kuti achepetse voliyumu ndi kulemera, waveguides yokhala ndi b
Chiŵerengero chachikulu cha bandwidth chomwe chiwongolero chozungulira chingafalitse ndi 1.3601:1, ndiko kuti, chiŵerengero cha ma frequency apamwamba kwambiri a single-mode kupita ku ma frequency otsika kwambiri ndi 1.3601:1. Ma frequency ogwiritsira ntchito ofunikira a rectangular waveguide ndi ma frequency 30% kuposa ma cutoff frequency ndi 5% pansi pa ma cutoff frequency achiwiri apamwamba kwambiri. Ma verification olimbikitsidwa awa amaletsa kufalikira kwa ma frequency pama frequency otsika komanso ntchito ya multimode pama frequency apamwamba.
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Nthawi yotumizira: Juni-12-2023
