Kuwana kweAntenna kunoreva kuwana kwesimba rakavhenekerwa kweantenna mune yakananga nzira inoenderana neyakanakira poindi sosi antenna. Inomiririra kugona kwemwaranzi yeantenna mune yakananga nzira, ndiko kuti, kugashira chiratidzo kana kubuda kweantenna munzira iyoyo. Iyo yakakwira iyo antenna kuwana, zvirinani iyo antenna inoita munzira chaiyo uye inogona kugamuchira kana kutumira masaini zvakanyanya. Kuwanikwa kweAntenna kunowanzo kuratidzwa mumadecibel (dB) uye chimwe chezviratidzo zvakakosha zvekuongorora mashandiro eantenna.
Tevere, ini ndinokutora iwe kuti unzwisise iyo yakakosha misimboti yeantenna kuwana uye maitiro ekuverenga antenna kuwana, nezvimwe.
1. Nheyo yekuwana antenna
Tichitaura, iyo antenna kuwana ireshiyo yesimba rechiratidzo density inogadzirwa neantenna chaiyo uye yakanakira poindi sosi antenna pane imwe nzvimbo munzvimbo pasi pesimba rimwe chete rekuisa. Pfungwa yeiyo point source antenna inotaurwa pano. Chii ichochi? Muchokwadi, iyo antenna iyo vanhu vanofungidzira kuburitsa masaini zvakafanana, uye chiratidzo chemwaranzi pateni inzvimbo yakaparadzaniswa zvakafanana. Muchokwadi, antennas ane radiation yekuwana mafambiro (pano anonzi ma radiation surfaces). Chiratidzo chiri panzvimbo yemwaranzi ichave yakasimba kudarika kukosha kwemwaranzi yeiyo theoretical point source antenna, ukuwo chiratidzo chemwaranzi mune mamwe mativi chisina simba. Kuenzanisa pakati pekukosha chaiko uye kukosha kwedzidziso pano ndiko kuwana kweantenna.
Mufananidzo unoratidzaRM-SGHA42-10chigadzirwa modhi Wana data
Izvo zvakakosha kucherechedza kuti passive antennas inowanzoonekwa nevanhuwo zvavo haingowedzere simba rekutapurirana, asi zvakare inoshandisa simba rekutapurirana. Chikonzero nei ichiri kutorwa seine purofiti imhaka yekuti mamwe madhairekitori anobairwa, iyo radiation kutungamira inomisikidzwa, uye chiyero chekushandisa chiratidzo chinovandudzwa.
2. Kuverenga kweantenna kuwana
Kuwana kweAntenna kunomiririra dhigirii reiyo yakadzika mwaranzi yemagetsi isina waya, saka ine hukama zvakanyanya neiyo antenna radiation pateni. Kunzwisisa kwakawanda ndekwekuti iyo yakatetepa iyo huru lobe uye idiki iyo yedivi lobe mune antenna mwaranzi pateni, inokwirisa kuwana . Saka sei kuverenga antenna kuwana? Kune antenna yakajairika, fomula G (dBi) = 10Lg {32000/(2θ3dB, E × 2θ3dB, H)} inogona kushandiswa kufungidzira kuwana kwayo. formula,
2θ3dB, E uye 2θ3dB, H ndiwo upamhi hwedanda hweantenna pandege huru mbiri dzakateerana; 32000 ndiyo nhamba empirical data.
Saka zvingarevei kana 100mw wireless transmitter ine antenna ine pfuma ye +3dbi? Kutanga, shandura simba rekutumira kuita chiratidzo kuwana dbm. Iyo calculation method ndeye:
100mw=10lg100=20dbm
Wobva waverenga iyo yakazara simba rekufambisa, iro rakaenzana nehuwandu hwesimba rekufambisa uye kuwana antenna. Nzira yekuverenga ndeyotevera:
20dbm+3dbm=23dbm
Chekupedzisira, iyo yakaenzana yekufambisa simba inoverengerwa zvakare seinotevera:
10^ (23/10)≈200mw
Mune mamwe mazwi, iyo +3dbi kuwana antenna inogona kupeta yakaenzana simba rekufambisa.
3. Common kuwana antennas
Iwo antennas edu akajairika mawaya ma routers ari omnidirectional antenna. Yayo mwaranzi yenzvimbo iri pane yakatwasuka ndege yakanangana neantenna, uko kuwanda kwemwaranzi kwakakura, nepo mwaranzi iri pamusoro uye pazasi peantenna yakadzikira zvakanyanya. Zvakafanana nekutora chiremwaremwa chechiratidzo wochigadzika zvishoma.
Antenna kuwana ingori "kuumbwa" kwechiratidzo, uye saizi yekuwana inoratidza chiyero chekushandiswa kwechiratidzo.
Kune zvakare yakajairwa ndiro antenna, inowanzova inotungamira antenna. Kupisa kwayo kwemwaranzi kuri munzvimbo ine fan-shaped yakananga pamberi peplate, uye masaini mune dzimwe nzvimbo haana simba zvachose. Zvakafanana nekuwedzera chivharo chechiedza chegirobhu.
Muchidimbu, antennas epamusoro-soro ane mabhenefiti ehurefu uye zvirinani chiratidzo chemhando, asi anofanirwa kubayira radiation munzira yega (kazhinji yakaraswa nzira). Low-gain antennas kazhinji ane hombe yekutungamira renji asi ipfupi renji. Kana zvigadzirwa zvisina waya zvinobva mufekitori, vagadziri vanowanzozvigadzirisa zvinoenderana nemamiriro ekushandisa.
Ndinoda kukurudzira zvimwe zvigadzirwa zveantenna zvine pundutso yakanaka kune wese:
RM-BDHA056-11 (0.5-6GHz)
RM-DCPHA105145-20A (10.5-14.5GHz)
RM-SGHA28-10 (26.5-40GHz)
Nguva yekutumira: Kubvumbi-26-2024
