Kubudirira kweantennainoreva kugona kweantenna kushandura simba remagetsi rinopinza kuita simba reradiated.Mukukurukurirana kusina waya, kushanda kweantenna kune zvakakosha pamhando yekufambisa kwechiratidzo uye kushandiswa kwesimba.
Kushanda kweiyo antenna kunogona kuratidzwa neinotevera fomula:
Kubudirira = (Radiated simba / Input simba) * 100%
Pakati pazvo, Simba reRadiated isimba remagetsi rinovhenekerwa neantenna, uye Input simba ndiro simba remagetsi rekuisa kune antenna.
Kushanda kwe antenna kunokanganiswa nezvakawanda zvinhu, zvinosanganisira dhizaini yeantenna, zvinhu, saizi, mafambisirwo ekushanda, nezvimwewo. Kazhinji kutaura, kukwirisa kweantenna, ndiko kunyatsogona kushandura simba remagetsi rinopinza kuita simba rinopenya, nekudaro. kuvandudza kunaka kwekufambiswa kwechiratidzo uye kuderedza kushandiswa kwesimba.
Naizvozvo, kushanda zvakanaka chinhu chakakosha kutariswa paunenge uchigadzira nekusarudza antenna, kunyanya mumashandisirwo anoda kutapurirana kure-kure kana ane zvinodiwa zvakasimba pakushandisa simba.
1. Antenna kunyatsoshanda
Mufananidzo 1
Pfungwa yekushanda kweantenna inogona kutsanangurwa uchishandisa Mufananidzo 1.
Iyo yakazara antenna kunyatsoshanda e0 inoshandiswa kuverenga kurasikirwa kweantenna pane yekuisa uye mukati meiyo antenna chimiro.Tichireva Mufananidzo 1(b), kurasikirwa uku kunogona kuve nekuda kwe:
1. Kuratidzira nekuda kwekusawirirana pakati petambo yekutapurirana neantenna;
2. Conductor uye dielectric kurasikirwa.
Iyo yakazara antenna kunyatsoshanda inogona kuwanikwa kubva kune inotevera fomula:
Ndiko kuti, kukwana kwakakwana = chigadzirwa chekusawirirana zvakanaka, conductor kunyatsoshanda uye dielectric kunyatsoshanda.
Zvinowanzo kuoma kwazvo kuverenga conductor kunyatsoshanda uye dielectric kunyatsoita, asi ivo vanogona kutariswa nekuyedza.Nekudaro, zviedzo hazvigone kusiyanisa kurasikirwa kuviri, saka fomula iri pamusoro inogona kunyorwa zvakare se:
ecd ndiko kugona kwemwaranzi yeantenna uye Γ ndiyo inoratidzira coefficient.
2. Kuwana uye Kubudirira Kubudirira
Imwe metric inobatsira yekutsanangura kuita kweantenna kuwana.Kunyangwe kuwana kweantenna kwakabatana zvakanyanya nekutungamira, iyo paramende inofunga nezve zvese kushanda uye kutungamira kweiyo antenna.Directivity iparameter inongotsanangura hunhu hweanonamira, saka inotemerwa chete neradiation pateni.
Kuwanikwa kweantenna munzira yakatarwa kunotsanangurwa se "4π nguva yereshiyo yeradiation intensity munzira iyoyo kune iyo yakazara simba rekuisa."Kana pasina gwara rinotsanangurwa, kuwana kwakanangana neradiation yakanyanya kunowanzo kutorwa.Saka, kazhinji pane:
Kazhinji, inoreva kupfuma kwehama, iyo inotsanangurwa se "chiyero chekuwana simba munzira yakatarwa kune simba rereferenzi antenna munzira yekunongedzera".Simba rekuisa kune iyi antenna rinofanira kuenzana.Iyo referensi antenna inogona kuve vibrator, nyanga kana imwe antenna.Muzhinji, iyo isiri-directional point sosi inoshandiswa sereferensi antenna.Naizvozvo:
Hukama huripo pakati pesimba reradiated uye simba rese rekuisa ndeichi:
Zvinoenderana nechiyero cheIEEE, "Kuwana hakusanganisi kurasikirwa nekuda kweiyo impedance mismatch (reflection kurasikirwa) uye polarization mismatch (kurasikirwa)."Pane pfungwa mbiri dzekuwana, imwe inonzi kuwana (G) uye imwe inonzi inogoneka kuwana (Gre), iyo inofunga nezve kuratidzira / kukanganisa kurasikirwa.
Hukama huri pakati pekuwana uye kutungamira ndeiyi:
Kana iyo antenna yakanyatso kufananidzwa netambo yekufambisa, kureva kuti, iyo antenna yekupinza impedance Zin yakaenzana nehunhu impedance Zc yemutsara (|Γ| = 0), ipapo kuwana uye kuwanikwa kunowanikwa zvakaenzana (Gre = G. )
Kuti udzidze zvakawanda nezve antennas, ndapota shanya:
Nguva yekutumira: Jun-14-2024
