Kwihlabathi lee-antenna, kukho umthetho onjalo. Xa i-ethe nkqoi-antenna epholisiweyoithumela, inokufunyanwa kuphela yi-antenna evulwa ngokuthe nkqo; xa i-antenna evulwa ngokuthe nkqo ithumela, inokufunyanwa kuphela yi-antenna evulwa ngokuthe nkqo; xa isandla sasekunenei-antenna ejikelezileyo epholanayoithumela, inokwamkelwa kuphela yi-antenna ejikelezileyo ejikelezayo yesandla sasekunene; xa i-antenna ejikelezileyo ejikeleze yesandla sasekhohlo ithumela, inokwamkelwa kuphela yi-antenna ejikelezileyo ejikeleze yesandla sasekunene; I-antenna ejikelezileyo ejikeleze yesandla sasekhohlo ithumela kwaye inokwamkelwa kuphela yi-antenna ejikelezileyo ejikeleze yesandla sasekhohlo.
RM-CPHA82124-20 （8.2-12.4GHz)
RM-CPHA1840-12(18-40GHz)
RM-CPHA218-16(2-18GHz)
I-RFMISOIimveliso ze-antenna zephondo ezijikelezileyo ezijikelezileyo
I-antenna ebizwa ngokuba yi-vertical polarized antenna ibhekisa kwi-wave ekhutshwa yi-antenna, kwaye ulwalathiso lwayo lwe-polarization luthe nkqo.
Icala le-polarisation le-wave libhekisa kwicala le-electrical field vector.
Ngoko ke, icala le-polarisation le-wave lithe nkqo, oko kuthetha ukuba icala le-electrical field vector lithe nkqo.
Ngokufanayo, i-antenna ethe tyaba ithetha ukuba icala lamaza lithe tyaba, oko kuthetha ukuba icala lombane lamaza alikhuphayo lihambelana nomhlaba.
I-vertical polarization kunye ne-horizontal polarization zombini ziintlobo ze-linear polarization.
Okubizwa ngokuba yi-linear polarization kubhekisa kwi-polarization yamaza, oko kukuthi, indlela intsimi yombane ekhomba ngayo kwicala elimiselweyo. I-Fixed ithetha ukuba ayizukutshintsha.
I-antenna ejikelezileyo epholisiweyo ibhekisa kwi-polarization yamaza, oko kukuthi, kwicala lentsimi yombane, ejikeleza ngesantya esifanayo se-angular w njengoko ixesha litshintsha.
Ngoko ke, i-polarization ejikelezayo yesandla sasekhohlo nesandla sasekunene ifunyanwa njani?
Impendulo ikwizandla zakho.
Zikhuphe zombini izandla, ubhontsi bazo bejonge kwicala apho amaza asasazeka khona, uze ubone ukuba zeziphi izandla ezigobileyo ezijikeleza kwicala elifanayo ne-polarisation.
Ukuba isandla sasekunene siyafana, yi-polarization yesandla sasekunene; ukuba isandla sasekhohlo siyafana, yi-polarization yesandla sasekhohlo.
Okulandelayo, ndiza kusebenzisa iifomula ukukuchazela. Ngoku masithi kukho amaza amabini alungelelanisiweyo ngomgca.
Icala elinye le-polarization licala lika-x kwaye i-amplitude yi-E1; icala elinye le-polarization licala lika-y kwaye i-amplitude yi-E2; omabini amaza asasazeka kwicala lika-z.
Intsimi yombane iyonke idlula amaza amabini, kwaye ibandakanya:
Ukusuka kule fomyula ingentla, kukho amathuba amaninzi:
(1) E1≠0, E2=0, ngoko ke ulwalathiso lwe-polarisation lwe-plane wave yi-x-axis
(2) E1=0, E2≠0, ngoko ke ulwalathiso lwe-polarisation lwe-plane wave yi-y-axis
(3) Ukuba i-E1 kunye ne-E2 zombini ziinombolo zokwenyani kwaye azingo-0, ngoko ke ulwalathiso lwe-polarisation lwe-plane wave lwenza i-engile elandelayo ene-x-axis:
(4) Ukuba kukho umahluko othile wesigaba phakathi kwe-E1 kunye ne-E2, njengoko kubonisiwe kumfanekiso ongezantsi, i-plane wave ingaba yi-round-rounded polarized wave okanye i-rounded rounded wave yesandla sasekhohlo.
Ukuze ii-antenna ezijikelezileyo zifumane amaza ajikelezileyo ngokuthe nkqo, kunye nee-antenna ezijikelezileyo ngokuthe nkqo zifumane amaza ajikelezileyo athe nkqo, ungayiqonda loo nto ngokujonga umfanekiso ongezantsi.
Kodwa kuthekani ngamaza ajikelezileyo ajikelezileyo? Kwinkqubo yokufumana i-circular polarization, ifunyanwa ngokubeka i-linear polarizations ezimbini ezinomahluko wesigaba.
Ukuze ufunde okungakumbi ngee-antenna, nceda undwendwele:
Ixesha leposi: Meyi-21-2024
