Ib qhov nruab nrab lossy dielectric txhais tau tias yog a nruab nrab uas qhov hluav taws xob conductivity tsis sib npaug rau xoom tsis tau nws tsis yog tus neeg xyuas pib zooTeem σ ≠ 0 hauv Kev Ua Haujlwm 1.12 ua rau tsis-zero attenuation tas li (α ≠ 0). … Attenuation ntawm EM nthwv dej nyob rau hauv ib tug lossy dielectric nruab nrab thiab txhais ntawm lub hwj chim nkag mus rau qhov tob.
Dab tsi yog qhov nruab nrab poob?
lossy nruab nrab: Ib qhov nruab nrab uas muaj qhov tseem ceeb ntawm lub zog ntawm lub zog hluav taws xob propagating electromagnetic yoj yog absorbed rau ib chav nyob deb uas tau mus los ntawm yoj. [
Dab tsi yog lossy dielectrics?
Ib qho poob dielectric tuaj yeem piav qhia raws li a nruab nrab qhov twg qee feem ntawm cov hluav taws xob nthwv dej hluav taws xob ploj thaum nthwv dej tawm. Lub zog poob no yog vim tsis zoo conduction. Ib tug lossy dielectric muab ib nrab ua nruab nrab nrog conductivity ?≠0.
Yog lossless dielectric zoo meej dielectric?
Rau qhov zoo tshaj plaws dielectric, qhov conductivity yuav yog xoom. Kev piav qhia: Cov theem tsis tu ncua yog muab los ntawm β=ω√(με), qhov twg ω yog qhov zaus hauv rad / s thiab 1 / √(με) yog qhov nrawm ntawm nthwv dej. … Nyob rau hauv ib tug lossless dielectric, qhov poob ntawm lub hwj chim yuav tsis tshwm sim Yog li qhov attenuation yuav xoom.
Dab tsi yog qhov sib txawv ntawm lossy thiab lossless dielectric?
Ib lub dielectric poob yog qhov nruab nrab uas EM nthwv dej poob lub zog thaum nws nthuav tawm vim qhov tsis zoo. Nyob rau hauv lwm yam lus, ib tug lossy dielectric yog ib feem ntawm qhov nruab nrab (iperfect dielectric los yog imperfect conductor) nrog ib tug =0, raws li txawv los ntawm ib tug lossless dielectric (zoo meej los yog zoo dielectric) nyob rau hauv uas a=0.
