I-waveguide (okanye i-wave guide) yintambo yokudlulisa ityhubhu engenanto eyenziwe ngumqhubi olungileyo. Sisixhobo sokusasaza amandla e-electromagnetic (ngokuyintloko idlulisela amaza e-electromagnetic anamaza obude obufana neesentimitha) Izixhobo eziqhelekileyo (ngokuyintloko idlulisela amaza e-electromagnetic anamaza obude obufana neesentimitha).
Ukukhethwa kobungakanani be-rectangular waveguide kufuneka kuqwalaselwe ezi zinto zilandelayo:
1. Ingxaki ye-bandwidth ye-Waveguide
Ukuqinisekisa ukuba amaza e-electromagnetic ngaphakathi koluhlu oluthile lwefrikhwensi anokwanda kwimo ye-TE10 enye kwi-waveguide, ezinye iindlela zolandelelwano oluphezulu kufuneka zinqunyulwe, emva koko b
2. Ingxaki yomthamo wamandla e-Waveguide
Xa kwandiswa amandla afunekayo, i-waveguide ayinakuqhekeka. Ukunyusa ngokufanelekileyo u-b kunokunyusa amandla ombane, ngoko ke u-b kufuneka abe mkhulu kangangoko.
3. Ukuncitshiswa kwesikhokelo segagasi
Emva kokuba i-microwave idlule kwi-waveguide, kunethemba lokuba umbane awuyi kulahleka kakhulu. Ukwandisa i-b kunokwenza i-attenuation ibe ncinci, ngoko ke i-b kufuneka ibe nkulu kangangoko.
Xa kujongwa izinto ezinomtsalane, ubungakanani be-waveguide engunxande bukhethwa ngokubanzi ngolu hlobo:
i-a=0.7λ, i-λ yi-cut-off wavelength ye-TE10
b=(0.4-0.5)a
Uninzi lwee-waveguides eziziingxande ziyilwe ngomlinganiselo we-aspect ratio ye-a:b=2:1, eyaziwa ngokuba zii-standard waveguides, ukuze kubekho umlinganiselo we-bandwidth ophezulu we-2:1, oko kukuthi, umlinganiselo we-frequency ephezulu ukuya kwi-cutoff frequency esezantsi yi-2:1. Ukuze kuphuculwe umthamo wamandla, i-waveguides ene-b>a/2 ibizwa ngokuba yi-high waveguides; ukuze kuncitshiswe umthamo kunye nobunzima, i-waveguides ene-b
Umlinganiselo ophezulu we-bandwidth onokusasazwa yi-circular waveguide yi-1.3601:1, oko kukuthi, umlinganiselo we-single-mode frequency ephezulu ukuya kwi-cut-off frequency esezantsi yi-1.3601:1. I-frequency yokusebenza ecetyiswayo ye-rectangular waveguide yi-frequency engama-30% ngaphezulu kwe-cutoff frequency kunye ne-5% ngaphantsi kwe-second highest mode cutoff frequency. La maxabiso acetyiswayo athintela ukusasazeka kwe-frequency kwi-frequency ezisezantsi kunye nokusebenza kwe-multimode kwi-frequency eziphezulu.
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Ixesha lokuthumela: Juni-12-2023
