Mfundo ya ma antenna olumikizirana ndi zowonjezera,
momwe mungalandirire bwino ndikutumiza ma siginolo a ma amplifiers obwerezabwereza a 3g/4g？
Webusaiti:https://www.lintratek.com/
Choyamba, mfundo ya antenna:
1.1 Tanthauzo la antenna:
Chipangizo chomwe chingathe kutulutsa bwino mafunde amagetsi kupita mbali inayake mumlengalenga kapena kulandira bwino mafunde amagetsi kuchokera mbali inayake mumlengalenga.
1.2 Ntchito za Antena:
Ø Kusintha kwa mphamvu - kusintha kwa mafunde otsogozedwa ndi mafunde a malo omasuka; Kuwala kwa mayendedwe (kulandira) - kuli ndi chitsogozo china.
1.3 mfundo ya kuwala kwa antenna:
1.4 Magawo a Antena
Chizindikiro cha kuwala
Ø M'lifupi mwa theka la mtanda wa mphamvu, chiŵerengero cha kutsogolo ndi kumbuyo;
Ø njira yogawanitsira, kusankhana mitundu yosiyanasiyana;
Ø Chitsogozo cha malangizo, phindu la antenna;
Ø Lobe yaikulu, lobe yachiwiri, kuletsa lobe ya m'mbali, kudzaza zero, kutsika kwa beam…
Gawo la dera
Chiŵerengero cha mafunde oyima a VSWR, coefficient yowunikira Γ, kutayika kobwerera RL;
Ø Impedance yolowera Zin, kutayika kwa ma transmission TL;
Ø kudzipatula Iso;
Ø Kusinthasintha kwa dongosolo lachitatu PIM3…
Antena sidelobe
M'lifupi mwa Mtanda Wopingasa
Chiŵerengero cha kutsogolo ndi kumbuyo: Chimafotokoza chiŵerengero cha mphamvu yowunikira kutsogolo ndi antenna ndi mphamvu yowunikira kumbuyo mkati mwa ±30°.
Ubale pakati pa kukula kwa antenna ndi m'lifupi mwake
Kuchepetsa "tayala", chizindikiro chikakhala cholimba kwambiri, kukula kwa antenna kumakhala kwakukulu, ndipo m'lifupi mwake mumakhala wocheperako;
Mfundo zingapo zofunika pakuwonjezera mphamvu ya antenna:
Antena ndi chipangizo chopanda mphamvu ndipo sichingathe kupanga mphamvu. Kupeza ma antenna ndi luso lokhazikika bwino kuti lipereke mphamvu kapena kulandira mafunde amagetsi mbali ina.
Ø Kuchuluka kwa antenna kumapangidwa ndi kuyika kwa ma vibrator pamwamba. Kuchuluka kwa antenna kumakhala kwakukulu, kutalika kwake kumakhala kotalika. Wonjezerani kuchuluka ndi 3dB ndikuwirikiza kawiri voliyumu.
Pamene antenna ikukwera, mphamvu zake zimakhala zolimba, ndipo lobe yake imakhala yopapatiza.
1.5 Magawo a Radiation
Polarization: ikutanthauza njira kapena kusintha kwa vector yamagetsi mumlengalenga.
1.6 Magawo a Dera
Kutayika kobwerera
Awiri, zinthu za antenna
2.1 Njira Yotchulira Dzina la Antena:
Magulu a ma antenna: ODP (antenna yakunja yolunjika), OOA (antenna yakunja yolunjika), IXD (antenna yamkati), OCS (antenna yakunja yolunjika), OCA (antenna yakunja yozungulira), OYI (antenna yakunja ya Yagi), ORA (antenna yoponyera pamwamba panja), IWH (antenna yokhazikika pakhoma) ndi zina zotero.
Mphamvu ya theka la ngodya: 032,065,090,105,360 (antenna ya siteshoni yoyambira) 020,030,040,050,060,075,090,120,160,360 (antenna yobwerezabwereza)
Njira yolumikizira: R (kulumikiza kawiri), V (kulumikiza kamodzi)
Phindu: Mtengo wapamwamba kwambiri ndi 21dbi kutengera mtengo weniweni
Mitundu yolumikizirana: D (mutu wa Din), N (mutu wa mtundu wa N), S (mutu wa SMA), T (mutu wa TNC) ndi zina zotero
Band yolumikizira pafupipafupi:
Khodi yofotokozera: Zilembo za Chiroma zimasonyeza kupangidwa kwa chinthucho. Zilembo ndi manambala otsatirawa zikusonyeza ngodya yozungulira, mawonekedwe, ndi zina. Mtundu wa F; Kulamulira kwa magetsi kwa V; Kusinthasintha kwa magetsi kwa RV kutali
2.2 Antena ya Base Station
Antena Yoyang'anira Zonse Yokhala ndi Mafupipafupi Antena
Antena ya Ma Frequency Atatu
Antena ya Denga
Antena Yokwera Khoma
Antena ya Yagi
Antena ya Gridi
Broadband Omnidirectional Antena Log-Periodic Antena mbale Antena
3.1 Chogawa Mphamvu
Chogawa mphamvu ndi chipangizo chomwe chimagawa mphamvu ya chizindikiro chimodzi chotulutsa mphamvu m'ma output awiri kapena kuposerapo. Kwenikweni ndi chosinthira cha impedance.
Kodi chogawa mphamvu chingasinthidwe kuti chilowe m'malo mwa chophatikiza?
Ikagwiritsidwa ntchito ngati synthesizer, sikuti imangofunika kusiyanitsa kwakukulu, komanso chiŵerengero chochepa cha mafunde oyima, komanso imayang'ana kwambiri pakufunika kopirira mphamvu yayikulu. Poganizira kuti ma doko otulutsa a chogawa mphamvu cha cavity chomwe chimagwiritsidwa ntchito nthawi zambiri sakugwirizana, mafunde akulu oyima; Chifukwa cha kukana mphamvu kochepa kwa chogawa mphamvu cha microstrip, sitikulimbikitsa kugwiritsa ntchito chogawa mphamvu kuti mulowe m'malo mwa chophatikiza.
Chogawa Mphamvu cha M'mimbamo
Chachinayi, chiyambi cha coupler
4.1 Cholumikizira
Ø Cholumikizira ndi mtundu wa chinthu chomwe chimagawa mphamvu ya chizindikiro cholowera kudzera mu gawo lamagetsi ndi cholumikizira cha maginito kuti chikhale gawo la gawo lolumikizira, ndipo gawo lotsala la gawo lotulutsa kuti limalize kugawa mphamvu.
Ø Kugawa mphamvu kwa cholumikizira sikugawidwa mofanana. Kumadziwikanso kuti power sampler.
Cholumikizira chowongolera
Ma coupler otsogolera amagwiritsidwa ntchito nthawi zambiri ndi njira yodziwika bwino yoyendera ma signal a microwave poyesa zitsanzo, cholinga chachikulu ndikulekanitsa ndikupatula ma signal, kapena kusakaniza ma signal osiyanasiyana, ngati palibe katundu wamkati, ma coupler otsogolera nthawi zambiri amakhala netiweki ya ma doko anayi.
Cholumikizira cha m'mimba
Zinthu: Kunyamula mphamvu zambiri, kutaya pang'ono.
Chifukwa chake:
1. Mphepete mwa dzenjelo muli mpweya wodzaza, ndipo mu njira yotumizira, kufalikira kwa zinthu zoulutsira nkhani komwe kumachitika chifukwa cha njira yopumira mpweya kumakhala kochepa kwambiri.
2. Lamba wa waya wolumikizidwa nthawi zambiri amapangidwa ndi kondakitala yokhala ndi mphamvu zamagetsi zabwino (monga siliva pamwamba pa mkuwa), ndipo kutayika kwa kondakitala kumakhala kochepa.
3. Kuchuluka kwa dzenje lalikulu, kutentha kumachepa mofulumira. Kupirira mphamvu zambiri.
Chochepetsera
Ø Chotetezera ndi chinthu chokhala ndi madoko awiri obwerezabwereza
Zochepetsera mpweya zomwe zimagwiritsidwa ntchito kwambiri ndi zochepetsera mpweya zomwe zimayamwa.
Chogwirizira cha coaxial nthawi zambiri chimagwiritsidwa ntchito mu uinjiniya, chomwe chimakhala ndi netiweki yochepetsera "π" kapena "T".
Ma Coaxial attenuators nthawi zambiri amakhala ndi mitundu iwiri ya ma condenser okhazikika komanso osinthasintha.
Ø Ma Attenuator amagwiritsidwa ntchito makamaka kuwongolera mphamvu yotumizira ma signal a microwave mu dongosolo lozindikira ndikugwiritsa ntchito mphamvu yochulukirapo, motero kukulitsa kuchuluka kwa muyeso wa ma signal, monga magetsi, ma spectrum analyzer, ma amplifiers, ma receiver, ndi zina zotero.
Webusaiti:https://www.lintratek.com/
#Amplifier 4g #Chobwerezabwereza 4g
衰减器
Ø衰减器是二端口互易元件
Ø衰减器最常用的是吸收式衰减器.
Ø工程中通常使用的是同轴型衰减器，由“π”型或“T”型衰减网络组成.
Ø同轴衰减器通常有固定及可变衰减两种.
Ø衰减器主要用于检测系统中控制微波信号传输能量、消耗超额能量，因而扩展信号测量的动态范围，诸如功率计，频谱分析仪，放大器，接收器等.
Nthawi yotumizira: Januwale-18-2024