Cholumikizira cha RF Cavity chosagwira ntchito
Kodi aDuplexer?
Duplexer ndi chipangizo chomwe chimalola kulumikizana mbali zonse ziwiri kudzera pa njira imodzi. Mu machitidwe olumikizirana pa wailesi, chimalekanitsa wolandila ndi chotumizira pomwe chikuwalola kugawana antenna yofanana. Machitidwe ambiri obwerezabwereza pa wailesi amakhala ndi duplexer.
Ma Duplexer ayenera:
Iyenera kugwiritsidwa ntchito mu bande ya ma frequency yomwe imagwiritsidwa ntchito ndi wolandila ndi wotumiza ndipo iyenera kukhala yokhoza kugwiritsa ntchito mphamvu yotulutsa ya wotumiza.
Kupereka kukana kokwanira kwa phokoso la transmitter lomwe limachitika pafupipafupi yolandirira, ndipo liyenera kupangidwa kuti ligwire ntchito, kapena kuchepera, kusiyana kwa pafupipafupi pakati pa transmitter ndi receiver.
Perekani zodzipatula zokwanira kuti mupewe kufooka kwa chidziwitso cha wolandila.
Diplexer ndi Duplexer. Kodi kusiyana kwake ndi kotani?
Diplexer ndi chipangizo chopanda ntchito chomwe chimaphatikiza ma input awiri kukhala chotulutsa chofanana. Ma signali pa ma input 1 ndi 2 amakhala m'ma frequency band osiyanasiyana. Chifukwa chake, ma signali pa ma input 1 ndi 2 amatha kukhala pamodzi pa output popanda kusokonezana. Amadziwikanso kuti cross band combiner. Duplexer ndi chipangizo chopanda ntchito chomwe chimalola kulumikizana kwa bi-directional (duplex) kwa ma transmit ndi receiving frequency mkati mwa band imodzi panjira imodzi.
Mitundu yaMa Duplexer
Pali mitundu iwiri yoyambira ya ma duplexer: Band Pass ndi Band Reject.
Antena yodziwika bwino yokhala ndi duplexer
Ubwino wodziwikiratu wogwiritsa ntchito duplexer ndikuti timatha kutumiza ndi kulandira ndi antenna imodzi yokha. Popeza malo ali pa nsanja pamalo oyambira pamtengo wapamwamba, uwu ndi mwayi weniweni.
Mu makina amodzi okha, komwe kuli chotumizira chimodzi chokha ndi cholandirira chimodzi, kugwiritsa ntchito duplexer kuti athe kugawana antenna yofanana ndi chisankho chosavuta. Komabe, makina ambiri okhala ndi njira zingapo zotumizira ndi kulandira akaganiziridwa, vutoli limakhala lovuta kwambiri.
Vuto lalikulu logwiritsa ntchito ma duplexer mu njira zambiri likuwoneka tikaganizira za transmitter intermodulation. Uku ndiko kusakaniza kwa ma transmit signals ambiri pa antenna.
Ma antenna osiyana a Tx ndi Rx
Ngati tigwiritsa ntchito ma antenna osiyana otumizira ndi kulandira, zimatenga malo ambiri pa nsanja.
Ubwino waukulu ndi wakuti, ngakhale kuti kusintha kwa mawu pakati pa zizindikiro zotumizidwa pamodzi kumachitikabe mofanana pakati pa zizindikiro zotumizidwa pamodzi, palibenso njira yolunjika yomwe zinthuzi zingafikire.
cholandirira. M'malo mwake, kulekanitsidwa pakati pa ma antenna otumizira ndi olandira kumapereka chitetezo chowonjezera. Ngati ma transmitter ndi olandira akonzedwa mwanjira yolumikizana (monga: chimodzi pamwamba pa chinzake, nthawi zambiri ndi antenna yolandirira pamwamba pa nsanja), ndiye kuti kulekanitsidwa kopitilira 50dB ndikosavuta.
Pomaliza, pa makina a single channel, pitirizani kugwiritsa ntchito duplexer. Koma pa makina a multichannel, ngakhale ma antenna osiyana adzakuwonongerani malo ambiri pa nsanja iliyonse, iyi ndi njira yolimba kwambiri. Imateteza bwino makina anu ku kusokonezedwa kwakukulu ndi passive intermodulation chifukwa cha zolakwika zazing'ono komanso zovuta kuzisiyanitsa ndi zomangira kapena kukonza.
Chodulira cha UHFPulojekiti
Cholinga apa ndi kusunga kuyika kwa chingwe m'nyumba.
Nyumba yanga itamangidwa, idayikidwa ndi chingwe chimodzi chotsika cha coaxial kuchokera padenga kupita ku chipinda chochezera, chobisika mosamala pakhoma la m'mimba. Chingwechi chimanyamula ma DVB TV channels kuchokera pa denga la antenna kupita ku TV mu chipinda chochezera. Ndilinso ndi bokosi la TV la chingwe mu chipinda chochezera chomwe ndikufuna kugawa mozungulira nyumbayo ndipo amplifier yogawa imayikidwa bwino mu chipinda chochezera kuti zipinda zonse zifike mosavuta. Chifukwa chake, Duplexer kumapeto kwa chingwe chotsika imalola kuti inyamule DVB-TV pansi pa coax ndi Cable-TV pamwamba pa coax nthawi imodzi, bola ngati ndasankha Frequency yoyenera yogawa Cable-TV.
Ma TV Multiplexes amayamba pa 739MHz ndipo amakula mpaka 800MHz. Kugawa kwa Cable-TV kumatha kukonzedwa kuyambira 471-860 MHz. Chifukwa chake ndikhazikitsa gawo lotsika kuti ndinyamule CableTV mmwamba ndi coax pa ~488MHz ndi gawo lotsika kuti ndinyamule DVB-TV pansi. Gawo lotsika lidzanyamulanso DC kuti ipatse mphamvu amp yogawa mu loft ndi ma remote control code a Magic-eye pansi pa bokosi la Cable-TV.
Tikhozanso kusintha Cavity Duplexer malinga ndi zomwe mukufuna. Mutha kulowa patsamba losinthira kuti mupereke zofunikira zomwe mukufuna.
Nthawi yotumizira: Sep-24-2022
