I-Bandwidth yenye iparameter ye-eriyali esisiseko.I-Bandwidth ichaza uluhlu lweefrikhwensi ezinokuthi i-eriyali ikwazi ukuphuma ngokuchanekileyo okanye ifumane amandla.Ngokuqhelekileyo, i-bandwidth efunekayo yenye yeeparamitha ezisetyenziselwa ukukhetha uhlobo lwe-eriyali.Umzekelo, kukho iintlobo ezininzi zee-eriyali ezine-bandwidth encinci kakhulu.Ezi eriyali azinakusetyenziswa kwizicelo zebroadband.
I-Bandwidth idla ngokucatshulwa ngokomlinganiselo wamaza ombane (VSWR).Umzekelo, i-eriyali inokuchazwa njenge-VSWR <1.5 ngaphezulu kwe-100-400 MHz.Ingxelo ithi i-coefficient yokubonisa ingaphantsi kwe-0.2 kuluhlu lwamaza obuninzi obucatshulweyo.Ngoko ke, kumandla anikezelweyo kwi-eriyali, kuphela i-4% yamandla abonakaliswe emva kwi-transmitter.Ukongezelela, ilahleko yokubuyisela i-S11 = 20 * LOG10 (0.2) = i-13.98 decibels.
Nceda uqaphele ukuba oku kungasentla akuthethi ukuba i-96% yamandla ihanjiswa kwi-eriyali ngendlela yosasazo lwemitha yombane yombane.Ukulahlekelwa kwamandla kufuneka kuthathelwe ingqalelo.
Ukongeza, ipateni yeradiation iya kwahluka ngokuphindaphindiweyo.Ngokubanzi, imilo yepateni yemitha ayitshintshi kakhulu i-frequency.
Kusenokubakho neminye imigangatho esetyenziselwa ukuchaza i-bandwidth.Oku kunokuthi kube yipolarizing phakathi koluhlu oluthile.Ngokomzekelo, i-antenna ejikelezayo ejikelezayo inokuchazwa njenge-axial ratio ye-<3 dB ukusuka kwi-1.4-1.6 GHz (ngaphantsi kwe-3 dB).Olu luhlu lwe-polarization bandwidth lumalunga nee-eriyali ezijikelezayo.
Ubungakanani boluhlu luhlala lucaciswa kuluhlu lwayo lweFractional Bandwidth (FBW).I-FBW yireyishini yoluhlu lwamaza osasazo olwahlulwe ngumbindi wefrikhwensi (eyona frikhwensi iphezulu thabatha eyona iphantsi)."Q" ye-antenna iphinda ibhekiselele kwi-bandwidth (i-Q ephezulu ithetha i-bandwidth ephantsi kunye ne-vice versa).
Ukunika imizekelo ebambekayo yebhanwidth, nantsi itheyibhile yeebhanwidth kwiintlobo ze-eriyali eziqhelekileyo.Oku kuya kuphendula imibuzo, "Yintoni i-bandwidth ye-antenna ye-dipole?"kwaye "Yeyiphi i-eriyali ene-bandwidth ephezulu - i-patch okanye i-antenna ye-helix?".Ukuthelekisa, sinee-eriyali ezineziko elijikelezayo le-1 GHz (gigahertz) nganye.
Ububanzi bee-eriyali ezininzi eziqhelekileyo.
Njengoko ubona kwitheyibhile, i-bandwidth ye-antenna inokwahluka kakhulu.I-Patch (microstrip) ii-antenna ziphantsi kakhulu, ngelixa i-eriyali ye-helical ine-bandwidth enkulu kakhulu.
Ixesha lokuposa: Nov-24-2023
