Monga nthambi ya mlongoti, mlongoti wa galimoto uli ndi mphamvu zogwirira ntchito mofanana ndi tinyanga zina, ndipo amakumana ndi mavuto ofanana ndi omwe akugwiritsidwa ntchito.
1. Choyamba, pali ubale wotani pakati pa malo oyika antenna yagalimoto ndi kuwongolera kwake?
Mwachidziwitso, mlongoti wagalimoto womwe umayikidwa pagalimoto ulibe mayendedwe olunjika, koma chifukwa cha mawonekedwe osakhazikika a thupi lagalimoto komanso malo oyika mlongoti, kuyika kwenikweni kwa mlongoti wam'manja kumakhala ndi kuwongolera, komanso magwiridwe antchito. kuwongolera uku ndikosiyana ndi mlongoti wolunjika.Mayendedwe a tinyanga zamagalimoto ndi osakhazikika ndipo amasiyanasiyana galimoto ndi galimoto.
Ngati mlongoti waikidwa pakati pa denga, kuwala kwa mlongoti kutsogolo ndi kumbuyo kumakhala kolimba pang'ono kusiyana ndi kumanzere ndi kumanja.Ngati mlongoti wayikidwa mbali imodzi, mphamvu ya radiation imakhala yabwinoko mbali ina.Choncho, nthawi zina timapeza kuti tikamayenda mofanana, zotsatira za kulankhulana zili bwino, koma tikabwerera, zotsatira za kulankhulana kwachindunji zimakhala zosiyana kwambiri, chifukwa zotsatira za radiation ya antenna kumbali zonse za galimoto ndizosiyana.
2. Chifukwa chiyani ma siginecha olumikizana mwachindunji amapitilira pakagwiritsidwe ka V/UHF mafoni?
Kawirikawiri, mafunde afupipafupi a V / UHF amakhala ndi njira zingapo panthawi yopatsirana, ena amafika kumalo olandirira molunjika, ndipo ena amafika polandira pambuyo posinkhasinkha.Pamene mafunde akudutsa mumtengo wachindunji ndi mafunde owonetseredwa ali mu gawo lomwelo, pamwamba pa mafunde awiriwa kumabweretsa kulimbikitsana kwa mphamvu ya chizindikiro.Pamene mafunde achindunji ndi owonetseredwa ali mu magawo osiyana, mawonekedwe awo amasiyana.Pamene mtunda pakati pa kutumiza ndi kulandira wailesi ya galimoto imasintha nthawi zonse pamene ikuyenda, mphamvu ya mafunde a wailesi imasinthanso kwambiri, zomwe zimawoneka mu chizindikiro chapakatikati.
Ndi liwiro losuntha losiyana, nthawi ya kusintha kosinthika kwamphamvu yamawayilesi imakhalanso yosiyana.Lamulo losintha ndilo: kuwonjezereka kwa maulendo ogwirira ntchito, kufupikitsa kutalika kwa mawonekedwe, kuthamanga kwachangu, kuthamanga kwafupipafupi kwa chizindikiro chapakati.Choncho, pamene chizindikiro cha discontinuity chimakhudza kwambiri kulankhulana, mukhoza kuchepetsa pang'onopang'ono kuthamanga, kupeza malo omwe chizindikiro cha superposition chili champhamvu kwambiri, kuyimitsa galimoto kuti muyankhule mwachindunji, ndikubwereranso pamsewu.
3. Kuyika kwa mlongoti wagalimoto kapena kuyika kwa oblique kuli bwino?
Magalimoto ambiri amagwiritsa ntchito tinyanga zoyimirira pazifukwa zotsatirazi: choyamba ndikuti mlongoti woyima polarized theoretically alibe chiwongolero cholowera kopingasa, kotero kuti wayilesi yamagalimoto pakugwiritsa ntchito mafoni sayenera kuvutikira kuti igwirizane ndi komwe mlongoti akulowera;Chachiwiri, mlongoti woyima ukhoza kugwiritsa ntchito chipolopolo chachitsulo ngati oscillator yake, kotero kuti pamene mlongoti wowongoka ukugwiritsidwa ntchito, theka lokha la kupanga likhoza kukhazikitsidwa, ndipo zina zonse zikhoza kusinthidwa ndi thupi la galimoto, lomwe silimangochepetsa. mtengo, komanso imathandizira kukhazikitsa ndi kugwiritsa ntchito.Chachitatu ndi chakuti mlongoti woyimirira umakhala ndi malo ochepa, ndipo kukana kwa mphepo kwa mlongoti kumakhala kochepa, komwe kumapangitsa kuyenda mofulumira.
Kuchokera pamalingaliro awa, gawo lomwe takhazikitsa ndi theka chabe la mlongoti woyima.Chifukwa chake, mlongoti ukakhala wokwezedwa mbali imodzi, mafunde a wailesi omwe amatulutsidwa ndi mlongoti sakhala mafunde opindika, koma osakanikirana ndi mafunde opindika komanso opingasa.Ngati mlongoti wolandira wa mbali inayo umalandira mafunde ozungulira, Mphamvu ya chizindikiro cholandilidwa imachepetsedwa (ndi polarization yochepa yopingasa), ndipo mosiyana ndi chizindikiro cholandiridwa.Kuphatikiza apo, mlongoti wa oblique umapangitsa kuti ma radiation asamayende bwino, omwe amawonetsedwa ngati ma radiation amtsogolo a mlongoti ndi wamkulu kuposa ma radiation akumbuyo, zomwe zimapangitsa kuti pakhale kuwongolera.
4. Momwe mungathetsere kusokoneza kwa phokoso komwe kumabwera ndi mlongoti wagalimoto mukalandira zikwangwani?
Kusokoneza kwa phokoso la antenna nthawi zambiri kumagawidwa kukhala kusokoneza kwakunja ndi kusokoneza mkati mwa mitundu iwiri.Kusokoneza kwakunja ndi chizindikiro chosokoneza chomwe chimalandiridwa kuchokera ku mlongoti kunja kwa galimoto, monga kusokoneza mafakitale, kusokoneza magetsi a m'tawuni, kusokoneza ma radiation ena a galimoto ndi kusokoneza mlengalenga, njira yothetsera vutoli ndiyo njira yabwino kwambiri yokhalira kutali ndi gwero losokoneza.Nthawi zambiri, mawonekedwe a FM mu gulu la V/UHF amatha kukana kusokonezedwa kwamtunduwu.Chizindikirocho chikatsegulidwa, dera lotsekereza lamkati la makina limatha kuthetsa kusokoneza.Pazosokoneza zamkati, mutha kuyesa ndikumvera wayilesi yomwe ili yofooka.Ngati kusokoneza sikuli kwakukulu, kumasonyeza kuti palibe vuto ndi kusokoneza dongosolo la galimoto.Ngati pali zosokoneza zina zamkati, kugwiritsa ntchito transceiver pa board kumathetsa mavuto ambiri.
Nthawi yotumiza: Nov-30-2022
