1. Antenna kuwana
Antennakuwana kunoreva chiyero cheiyo radiation simba density yeantenna mune imwe nzira yakatsanangurwa kune radiation simba density yereferenzi antenna (kazhinji yakanakira radiation point sosi) pane imwecheteyo simba rekuisa. Iyo paramita inomiririra kuwana antenna ndeye dBd uye dBi.
Chirevo chemuviri chekuwana chinogona kunzwisiswa sezvizvi: kugadzira chiratidzo cheimwe saizi pane imwe nzvimbo pane imwe chinhambwe, kana yakanakira isiri-directional point sosi inoshandiswa seyekufambisa antenna, simba rekuisa re100W rinodiwa, nepo kana antenna inotungamira ine kuwana kweG = 13dB (20 times) inoshandiswa seyekupinza simba antenna/5W = 0 chete, 5W = 0. Mune mamwe mazwi, kuwana kweantenna, maererano neiyo radiation mhedzisiro mune yakanyanya radiation kutungamira, ndiko kuwanda kwesimba rekupinza rakakwidziridzwa kana ichienzaniswa neiyo isiri-directional yakanaka point source.
Kuwana kweAntenna kunoshandiswa kuyera kugona kweantenna kutumira uye kugamuchira masaini mune yakatarwa nzira uye ndiyo imwe yeakakosha maparamita ekusarudza antenna. Kuwana kunoenderana zvakanyanya neiyo antenna pateni. Iyo yakatetepa iyo huru lobe ye pateni uye iyo diki yedivi lobe, inowedzera kuwana. Hukama huri pakati peiyo huru lobe hupamhi uye antenna kuwana inoratidzwa muMufananidzo 1-1.
Mufananidzo 1-1
Mumamiriro ezvinhu mamwe chetewo, kuwedzera kwemhindu, ndiko kureba kunoita masaisai eredhiyo achipararira. Nekudaro, mukuita chaiko, kuwana kweantenna kunofanirwa kusarudzwa zvine mutsindo zvichienderana nekuenderana kwedanda uye nzvimbo yekuvhara. Semuyenzaniso, kana chinhambwe chekuvhara chave pedyo, kuitira kuti uve nechokwadi chekuvharika kwenzvimbo iri padyo, antenna yakaderera ine yakafara vertical lobe inofanira kusarudzwa.
2. Mafungiro anoenderana
·dBd: maererano nekuwana kweiyo symmetrical array antenna,
·dBi: zvine hukama nekuwana kwenzvimbo sosi antenna, iwo radiation kumativi ese akafanana. dBi=dBd+2.15
Lobe angle: iyo kona yakaumbwa ne3dB pazasi peiyo huru lobe peak mune antenna pateni, ndapota tarisa kune iyo lobe hupamhi kuti uwane ruzivo, yakanakira radiation point sosi: inoreva yakanakira isotropic antenna, ndiko kuti, yakapusa point radiation sosi, ine yakafanana nemwaranzi maitiro munzvimbo dzese munzvimbo.
3. Calculation formula
Antenna kuwana = 10lg (antenna radiation simba density/reference antenna radiation simba density)
Kuti udzidze zvakawanda nezve antennas, ndapota shanya:
Nguva yekutumira: Zvita-06-2024
