Gabatarwa ga aikace-aikacen watsawar gani na RF RF akan Fiber

Gabatarwa ga aikace-aikacenRF na gani watsawaRF akan Fiber

A cikin 'yan shekarun nan, sadarwa ta microwave da fasahar sadarwa ta gani sun bunkasa cikin sauri. Dukansu fasahohin biyu sun samu ci gaba sosai a fannonin nasu, sannan kuma sun haifar da saurin bunkasuwar hanyoyin sadarwa ta wayar salula da watsa bayanai, wanda ya kawo sauki ga rayuwar jama'a. Fasaha guda biyu na sadarwa ta microwave da sadarwar photoelectric suna da nasu amfani, amma kuma suna da wasu rashin amfani waɗanda ba za a iya shawo kansu ba. Watsawar hoto yana buƙatar sadarwar jiki, kuma akwai wasu gazawa a cikin sassauci, sadarwar sauri da motsi na ginin. Sadarwar Microwave tana da wasu nakasu a cikin watsa nisa mai nisa da babban ƙarfi, kuma microwave yana buƙatar haɓakawa akai-akai da sake watsawa, kuma bandwidth na watsawa yana iyakance ta mitar mai ɗauka. Wannan ya haifar da hadewar microwave da fasahar watsa fiber na gani, wato fasahar Radio over Fiber (ROF), wacce galibi ake kira da suna.RF akan Fiber, ko fasahar nesa ta mitar rediyo. Filin RF da aka fi amfani da shi akan fasahar Fiber shine fannin sadarwa ta fiber gani, gami da tashoshin wayar hannu, tsarin rarrabawa, hanyoyin sadarwa mara waya, TV na USB, sadarwar cibiyar sadarwar masu zaman kansu da sauransu. A cikin 'yan shekarun nan, tare da haɓakar photonics na microwave, RF akan fasahar Fiber an yi amfani da shi sosai a cikin radar microwave, sadarwar UAV, binciken sararin samaniya da sauran fannoni. Dangane da nau'ikan nau'ikan laser da ke cikin Lasery, Sadarwar Laserical sadarwa ta zamani, ana amfani da shi na waje shine ingantaccen yanki a cikin wannan takarda. RF akan hanyoyin haɗin Fiber sun ƙunshi galibi na transceiver, watsawa, daROF links, kamar yadda aka nuna a cikin wannan adadi:

Takaitaccen gabatarwa ga sashin haske. Ana amfani da LD da yawaFarashin DFB(nau'in ra'ayi da aka rarraba), waɗanda ake amfani da su don ƙaramar amo, manyan aikace-aikacen kewayo mai ƙarfi, da FP (nau'in Fabry-Perot) ana amfani da laser don ƙarancin buƙata. Tsawon igiyoyin da aka fi amfani da su sune 1064nm da 1550nm. PD amai daukar hoto, kuma a daya gefen hanyar fiber optic, ana gano hasken ta hanyar PIN photodiode na mai karɓa, wanda ke canza hasken zuwa siginar lantarki sannan zuwa matakin sarrafa wutar lantarki da aka sani. Fiber na gani da ake amfani da shi don haɗin tsaka-tsaki shine yawanci-yanayin guda ɗaya da fiber na gani da yawa. Fiber-mode yawanci ana amfani da shi a cibiyar sadarwar kashin baya saboda ƙarancin watsawa da ƙarancin hasara. Multimode fiber yana da takamaiman aikace-aikace a cibiyar sadarwar yanki saboda yana da arha don kerawa kuma yana iya ɗaukar watsawa da yawa a lokaci guda. Attenuation na siginar gani a cikin fiber yana da ƙanƙanta, kawai ~ 0.25dB/km a 1550nm.

Dangane da halayen watsa layin layi da watsawar gani, hanyoyin haɗin ROF suna da fa'idodin fasaha masu zuwa:

• Ƙananan hasara, ƙarancin fiber kasa da 0.4 dB / km

• Fiber matsananci-bandwidth watsa, fiber asarar m daga mita

• Haɗi tare da mafi girman sigina ɗauke da iya aiki/bandwidth har zuwa 110GHz• Tsangwama na Electromagnetic (EMI) juriya (rauni ba ya shafar sigina)

• Ƙananan farashi a kowace mita • Fiber ya fi sauƙi kuma mai sauƙi, yana auna kusan 1/25 na waveguide da 1/10 na kebul na coaxial.

• Tsari mai sauƙi da sassauƙa na masu daidaitawa na lantarki-na gani (don tsarin likitanci da na inji)