I-waveguide (noma igayidi yamagagasi) 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 ngale ndlela:
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 yokunqamuka 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
