1. Kuwedzera kweantena
KanyangaKuwana zvinoreva chiyero chesimba remwaranzi reantenna munzira yakatarwa kusvika kusimba remwaranzi reantenna (kazhinji ndiyo nzvimbo yakanaka yemwaranzi) pasimba rimwe chete rekupinda. Maparamita anomiririra kuwana kweantenna ndeaya dBd ne dBi.
Zvinorehwa ne "gain" zvinogona kunzwisiswa seizvi: kugadzira chiratidzo chehukuru hwakati panzvimbo imwe pachinhambwe chakati, kana nzvimbo isina divi yakakodzera ikashandiswa se "transmitter antenna", simba re "input" re100W rinodiwa, nepo kana antenna ine divi ine "gain" yeG=13dB (ka20) ikashandiswa se "transmitter antenna", simba re "input" rinongova 100/20=5W chete. Nemamwe mashoko, "gain" ye "antenna", maererano ne "radiation effect" yayo mu "maximum radiation direction", i "multiple" ye "input power" inowedzerwa kana ichienzaniswa ne "non-directional ideal point source".
Kuwana antenna kunoshandiswa kuyera kugona kweantenna kutumira nekugamuchira masaini munzira yakatarwa uye ndeimwe yematanho akakosha pakusarudza antenna. Kuwana antenna kwakabatana zvakanyanya nepatani yeantenna. Kana lobe huru yepateni iri diki uye lobe yedivi iri diki, kuwedzera kwekuwana kunowedzera. Hukama huripo pakati pehupamhi hwelobe huru nekuwedzera kweantenna hunoratidzwa muMufananidzo 1-1.
Mufananidzo 1-1
Mumamiriro ezvinhu akafanana, kana kuwedzera kwesimba remagetsi kuchikwira, ndipo panobva mafungu eredhiyo anowedzera kupararira. Zvisinei, pakuita basa chairo, kuwedzera kwesimba remagetsi kunofanira kusarudzwa zvine musoro zvichienderana nekuenderana kwemuti nenzvimbo yekufukidza. Semuenzaniso, kana daro rekufukidza riri pedyo, kuitira kuve nechokwadi chekuti divi remagetsi riri pedyo rinoonekwa, antenna ine divi rakareba rakati sandara inofanira kusarudzwa.
2. Pfungwa dzine chekuita nazvo
·dBd: zvichienzaniswa nekubudirira kweantenna ye symmetrical array,
·dBi: kana tichienzanisa nekuwedzera kweantenna inobva papoint source, mwaranzi iri kumativi ese yakafanana. dBi=dBd+2.15
Kona yeLobe: kona inoumbwa ne3dB pasi pegomo guru reLobe muchimiro cheantenna, ndapota tarisai upamhi hweLobe kuti muwane rumwe ruzivo, nzvimbo yakanaka yemwaranzi: inoreva antenna yakanaka yeisotropic, kureva kuti, nzvimbo iri nyore yemwaranzi, ine hunhu hwakafanana hwemwaranzi kumativi ese muchadenga.
3. Fomura yekuverenga
Kuwedzera kweAntena = 10lg (kuwanda kwesimba remwaranzi yeantenna/kuwanda kwesimba remwaranzi yeantenna)
Kuti udzidze zvakawanda nezve antenna, ndapota shanyira:
Nguva yekutumira: Zvita-06-2024
