Mfundo yolumikizira tinyanga ndi zowonjezera,
momwe mungalandirire bwino ndikutumiza ma siginecha a 3g/4g ma siginecha obwereza amplifier?
Webusaiti:https://www.lintratek.com/
Choyamba, mfundo ya antenna:
1.1 Tanthauzo la mlongoti:
Chida chomwe chimatha kuwunikira bwino mafunde a electromagnetic kupita kudera linalake lamlengalenga kapena chokhoza kulandira mafunde a electromagnetic kuchokera kudera linalake lamlengalenga.
1.2 Ntchito za antenna:
Ø Kutembenuka kwa mphamvu - kutembenuka kwa mafunde owongolera ndi mafunde aulere; Directional radiation (reception) - ali ndi chiwongolero china.
1.3 Mfundo ya radiation ya antenna:
1.4 Antenna Parameters
Ma radiation parameter
Ø Theka lamphamvu lamphamvu m'lifupi, kutsogolo ndi kumbuyo;
Ø polarization mode, kusankhana pakati pa polarization;
Ø Directivity factor, phindu la mlongoti;
Ø Lobe yayikulu, lobe yachiwiri, kuponderezana kwa sidelobe, kudzaza zero, kutsika kwamitengo…
Zozungulira parameter
Voltage stand wave ratio VSWR, reflection coefficient Γ, kubwerera kutaya RL;
Ø Kulowetsedwa kwa Zin, kutaya kwa TL;
Ø kudzipatula Iso;
Ø Kukhazikitsa kwachitatu kwa Intermodulation PIM3…
Mtundu wa antenna
Chopingasa Beam Width
Chiyerekezo cha kutsogolo ndi kumbuyo: Imatanthawuza kuchuluka kwa mphamvu yowunikira kutsogolo kupita ku mlongoti ndi mphamvu yakumbuyo yowunikira mkati mwa ± 30 °.
Ubale pakati pa kupindula ndi kukula kwa mlongoti ndi kutalika kwake
Kuphwasula "tayala", pamene chizindikirocho chimayika kwambiri, kupindula kwakukulu, kukula kwa mlongoti, ndi kuchepetsa kuwala kwake;
Mfundo zazikuluzikulu za phindu la antenna:
Mlongoti ndi chipangizo chosagwira ntchito ndipo sichikhoza kutulutsa mphamvu. Kupindula kwa mlongoti ndikungotha kuyika mphamvu mogwira mtima kuti iwunikire kapena kulandira mafunde amagetsi mbali ina yake.
Ø Kupindula kwa mlongoti kumapangidwa ndi superposition ya vibrator. Kupindula kwapamwamba, kutalika kwa mlongoti. Wonjezerani phindu ndi 3dB ndikuwonjezera kuwirikiza kawiri.
Kuchuluka kwa tinyanga tating'onoting'ono, kumapangitsa kuti chiwongolero chikhale bwino, mphamvu zambiri zimakhazikika, ndipo lobe imachepa.
1.5 Ma radiation Parameters
Polarization: imatanthawuza njira kapena kusintha kwa vector yamagetsi mumlengalenga.
1.6 Zozungulira Zozungulira
Bwererani kutaya
Awiri, mankhwala mlongoti
2.1 Njira Yotchulira Antenna:
Mitundu ya mlongoti: ODP (mlongoti wapanja wolowera mlongoti), OOA (mlongoti wakunja wambali zonse), IXD (mlongoti wamkati wamkati), OCS (mlongoti wakunja wapanja), OCA (mlongoti wapanja), OYI (mlongoti wakunja wa Yagi), ORA (kuponya panja mlongoti pamwamba), IWH (m'nyumba khoma wokwera mlongoti) ndi zina zotero.
Theka la mphamvu :032,065,090,105,360(mlongoti wapansi) 020,030,040,050,060,075,090,120,160,360 (zobwerezabwereza)
Polarization mode: R (dual polarization), V (single polarization)
Phindu: Mtengo wapamwamba ndi 21dbi kutengera mtengo weniweni
Mitundu yolumikizana: D (Din mutu), N (N-mtundu mutu), S (SMA mutu), T (TNC mutu) ndi zina zotero.
Ma frequency bandi:
Nambala yachidziwitso: Zilembo zaku Roma zikuwonetsa kubadwa kwa chinthucho. Zilembo ndi manambala otsatirawa akuwonetsa mbali yoviika, mawonekedwe, ndi zina. F mtundu; V malamulo amagetsi; RV kutali magetsi modulation
2.2 Base Station Antenna
Mlongoti wa Omnidirectional Dual-Frequency Antenna
Antenna Atatu-Frequency
Antenna ya denga
Antenna Yokwera Pakhoma
Yagi Antenna
Grid Antenna
Broadband Omnidirectional Antenna Log-Periodic Antenna Plate Antenna
3.1 Wogawa Mphamvu
Chogawa mphamvu ndi chipangizo chomwe chimagawanitsa mphamvu ya chizindikiro chimodzi muzotulutsa ziwiri kapena zambiri. Ndiko kutembenuza kwa impedance.
Ø Kodi chogawa mphamvu chingasinthidwe kuti chilowe m'malo mwa chophatikiza?
Akagwiritsidwa ntchito ngati synthesizer, sikuti amangofuna kudzipatula kwambiri, chiŵerengero chochepa cha mafunde, komanso chimayang'ana pa kufunikira kopirira mphamvu zazikulu. Poganizira kuti madoko linanena bungwe la ambiri ntchito patsekeke mphamvu ziboda sizikugwirizana, lalikulu kuyimirira yoweyula; Chifukwa cha kukana kwamphamvu kwamphamvu kwa microstrip power splitter, sitikulimbikitsa kugwiritsa ntchito chogawa chamagetsi kuti chilowe m'malo mwa chophatikizira.
Cavity Power Divider
Chachinayi, oyamba awiri
4.1 Wokondedwa
Ø Coupler ndi mtundu wa chigawo chomwe chimagawira mphamvu ya siginecha yolowera kudzera m'munda wamagetsi ndi kuphatikizika kwa maginito kuti akhale gawo la kuphatikizika komaliza, ndi zina zonse zomwe zimatuluka kumapeto kuti amalize kugawa mphamvu.
Ø Kugawa mphamvu kwa coupler sikugawanika mofanana. Amatchedwanso power sampler.
Directional coupler
Ma Directional couplers amagwiritsidwa ntchito nthawi zambiri ndi njira yodziwika yoyendera ma siginecha a microwave kuti atsatire, cholinga chachikulu ndikulekanitsa ndi kupatula chizindikirocho, kapena kusakaniza ma sign osiyanasiyana, pakalibe katundu wamkati, ma couplers olowera nthawi zambiri amakhala ma doko anayi.
Cavity coupler
Mawonekedwe: Kukhala ndi mphamvu zambiri, kutayika kochepa.
Chifukwa chake:
1. Mphunoyi imadzazidwa ndi mpweya, ndipo mu njira yopatsirana, zofalitsa zofalitsa zomwe zimayambitsidwa ndi mpweya wa mpweya ndizochepa kwambiri.
2. Lamba wa waya wophatikizika nthawi zambiri amapangidwa ndi kondakitala wokhala ndi magetsi abwino (monga plating ya siliva pamwamba pa mkuwa), ndipo kutayika kwa conductor ndikosavuta.
3. Voliyumu yayikulu, kutentha kwachangu. Kupirira mphamvu zapamwamba.
Attenuator
Ø The attenuator ndi mbali ziwiri zobwerezabwereza
Ma attenuators omwe amagwiritsidwa ntchito kwambiri ndi attenuators.
Coaxial attenuator nthawi zambiri amagwiritsidwa ntchito mu engineering, yomwe imakhala ndi "π" kapena "T" attenuation network.
Coaxial attenuators nthawi zambiri amakhala ndi mitundu iwiri ya zolumikizira zokhazikika komanso zosinthika.
Ø Ma Attenuators amagwiritsidwa ntchito kwambiri kuwongolera mphamvu yotumizira ma siginecha a microwave munjira yozindikira ndikugwiritsa ntchito mphamvu zochulukirapo, motero amakulitsa kuchuluka kwa miyeso yama siginecha, monga mita yamagetsi, zowunikira ma spectrum, ma amplifiers, olandila, ndi zina zambiri.
Webusaiti:https://www.lintratek.com/
#Amplifaya 4g #Kubwereza 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如功率计，频谱分析仪，放大器，接收器等.
Nthawi yotumiza: Jan-18-2024