I-waveguide (noma i-wave guide) iwumugqa wokudlulisa we-tubular ongenalutho owenziwe ngomqhubi omuhle. Kuyithuluzi lokusabalalisa amandla kazibuthe kagesi (ikakhulukazi adlulisa amaza kagesi anobude begagasi ngokulandelana kwamasentimitha) Amathuluzi avamile (ikakhulukazi adlulisa amagagasi kagesi anobude obungamamitha ngokulandelana kwamasentimitha).
Ukukhethwa kosayizi we-waveguide engunxande kufanele kucabangele izici ezilandelayo:
1. Inkinga yomkhawulokudonsa we-Waveguide
Ukuqinisekisa ukuthi amagagasi kagesi ngaphakathi kwebanga lefrikhwensi enikeziwe angasabalala ngemodi eyodwa ye-TE10 ku-waveguide, ezinye izindlela zokuhleleka okuphezulu kufanele zinqanyulwe, bese b
2. Inkinga yomthamo wamandla we-Waveguide
Lapho usakaza amandla adingekayo, i-waveguide ayikwazi ukuphuka. Ukwandisa u-b ngendlela efanele kungakhuphula umthamo wamandla, ngakho u-b kufanele abe mkhulu ngangokunokwenzeka.
3. Ukuncishiswa kwe-waveguide
Ngemuva kokuthi i-microwave idlule ku-waveguide, kuthenjwa ukuthi amandla ngeke alahleke kakhulu. Ukwengeza okuthi b kungenza ukuncishiswa kube kuncane, ngakho u-b kufanele abe mkhulu ngangokunokwenzeka.
Uma kucatshangelwa izici ezikhangayo, usayizi we-waveguide engunxande ngokuvamile ukhethwa kanje:
a=0.7λ, λ iwubude obunqunyiwe begagasi be-TE10
b=(0.4-0.5)a
Amagagasi amaningi angama-rectangular aklanywe nge-aspect ratio engu-a:b=2:1, eyaziwa ngokuthi ama-waveguides ajwayelekile, ukuze kufinyelelwe isilinganiso esiphezulu somkhawulokudonsa ongu-2:1, okungukuthi, isilinganiso sefrikhwensi ephezulu kakhulu yokunqamuka okuphansi kakhulu. imvamisa ngu-2:1. Ukuze kuthuthukiswe umthamo wamandla, i-waveguide ene-b>a/2 ibizwa ngokuthi i-waveguide ephezulu; ukuze unciphise ivolumu nesisindo, i-waveguide nge b
Isilinganiso esiphezulu somkhawulokudonsa esingasakazwa yi-waveguide eyindilinga ngu-1.3601: 1, okungukuthi, isilinganiso semvamisa ephezulu yemodi eyodwa kuya ku-1.3601: 1. Imvamisa yokusebenza enconyiwe ye-waveguide engunxande iyifrikhwensi engu-30% ngaphezu kwefrikhwensi yokusika kanye no-5% ngaphansi kwefrikhwensi yokunqanyulwa kwemodi yesibili ephezulu. Lawa manani anconyiwe avimbela ukuhlakazeka kwefrikhwensi kumafrikhwensi aphansi kanye nokusebenza kwe-multimode kumafrikhwensi aphezulu.
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Isikhathi sokuthumela: Jun-12-2023
