RF Sefa mu Radio Broadcasting

 

Pakulankhulana pawailesi, fyuluta ya RF ndi chida chofunikira kwambiri chamagetsi. Potumiza ma siginecha pawailesi, nthawi zonse padzakhala magulu omwe sitikufuna, monga ma siginecha ena osayenera; kapena mwina pazifukwa zina zapadera, sitifuna kusiyanasiyana kwa ma frequency mu ma siginecha a wailesi. Pakadali pano, tifunika kusefa ma frequency osafunikira kudzera muzosefera za RF. Ndiye mtundu wanji wa zida zamagetsi ndi RF fyuluta ndipo n’chifukwa chiyani zili zofunika kwambiri? Gawo ili ndikuyankha funsoli.

 

Kugawana ndi Kusamalira!

 

Kodi RF Filter ndi chiyani

 

RF fyuluta ndi fyuluta yamagetsi, yomwe imagwiritsidwa ntchito kuchotsa kapena kusunga magulu angapo amtundu wa ma frequency mu ma siginecha a wailesi. Nthawi zambiri amagwiritsidwa ntchito popanga ma siginecha osiyanasiyana a MHz mpaka KHz (MF mpaka EHF). Amagwiritsidwa ntchito pazida zoulutsira pawailesi, zida zoyankhulirana zopanda zingwe, zida zapa TV, kuphatikiza ma transmitters osiyanasiyana ndi olandila. Imagwiritsidwa ntchito kuwonetsetsa kuti ma siginecha ena osafunikira asatumizidwe pawailesi, ndipo gawo la ma sigino ofunikira lidzasungidwa.

 

Powulutsa pawailesi, RF fyuluta ndi gawo lofunika kwambiri lamagetsi, chifukwa mu ma wayilesi, kuwonjezera pa gawo lomwe timafunikira, pali zina zomwe sitifunikira. Chifukwa chake, timafunikira zosefera za RF kuti tichotse mbali zosafunikira. Ngati mukufuna kugwiritsa ntchito fyuluta ya RF kuti mugwire ntchito mumtundu wa FM, tsimikizirani kuti kuchuluka kwa ma frequency kapena kupondereza komwe kumalembedwa pa fyuluta ya RF kuli pakati pa 88 - 108MHz.

 

Ntchito Zosefera Zosiyanasiyana za RF

 

Nthawi zambiri, zosefera zosiyanasiyana zimakhala ndi ntchito zinayi pakuwulutsa pawailesi

Zosefera Zapansi

Zosefera za Low pass ndi fyuluta yomwe imalola kuti mafupipafupi apansi adutse. Imadula ma frequency band apamwamba kuposa ma frequency ena. Gawo ili la frequency band lidzaponderezedwa ndipo sililoledwa kudutsa.

Nthawi zambiri amagwiritsidwa ntchito kusefa phokoso la mabwalo akunja mu ma siginecha amawu. Zizindikiro zomveka zomwe zimasinthidwa ndi fyuluta yotsika pansi zimakhala ndi khalidwe lomveka bwino.

Sefani Yapamwamba

M'malo mwake, fyuluta yapamwamba zimangolola kuti ma frequency apamwamba adutse ndikudula ma frequency band pansi pa ma frequency ena. Siginecha yamawu mu bandi iyi idzayimitsidwa.

Nthawi zambiri amagwiritsidwa ntchito pochotsa mabasi kuchokera kwa okamba ang'onoang'ono, kotero kuti fyuluta yapamwamba nthawi zambiri imapangidwira mu wokamba nkhani.

Sefa ya Band Pass

Sefa ya bandpass ndi fyuluta yomwe imalola kuti ma siginecha angapo azitha kudutsa ndikupondereza ma siginoloji ena omwe sali a gulu la ma frequency awa. Mafupipafupi omwe amatha kuperekedwa akhoza kusankhidwa mwaufulu ndipo akhoza kukhala maulendo awiri osasunthika a ma frequency.

 

Nthawi zambiri amagwiritsidwa ntchito polandila opanda zingwe ndi ma transmitters. Ntchito yake yaikulu mu transmitter ndi kuchepetsa gawo losafunika la zizindikiro zotulutsa kuti deta yofunikira iperekedwe pa liwiro lofunika ndi mawonekedwe mu bandwidth yochepa. Mu wolandila, ntchito yake yayikulu ndikulola kuchuluka kwa ma frequency omwe mukufuna ndikudula ma siginecha a ma frequency ena. Kupyolera mu kukonza fyuluta ya bandpass, khalidwe la chizindikiro likhoza kusinthidwa kwambiri ndipo mpikisano ndi kusokoneza pakati pa zizindikiro zingathe kuchepetsedwa.

Band Stop Sefani

Ntchito ya fyuluta ya bandstop ndizosiyana ndi fyuluta ya bandpass. Ndi fyuluta yomwe imangoletsa ma frequency angapo. Ntchito yake ndi yofanana ndi fyuluta ya bandpass, koma imagwira ntchito m'njira zosiyanasiyana.

Kawirikawiri, ziribe kanthu kuti ndi fyuluta yotani, ndi chipangizo chamagetsi chomwe chimalola kuti chizindikirocho chidutse mothandizidwa ndi passband. Mwachidule, ndi chipangizo chamagetsi chomwe chimakana kudutsa kwa zizindikiro zamtundu wina wafupipafupi ndipo zimalola kuti zizindikiro za maulendo ena azidutsa.

 

Chifukwa Chiyani RF Fyuluta Ndi Yofunika?

 

Tikudziwa ntchito ya fyuluta ya RF ndikulola kuti ma frequency angapo adutse ndikuletsa ma frequency ena kuti asadutse. Koma tanthauzo la zimenezi ndi chiyani?

 

  • Sinthani mawonekedwe azizindikiro - Pakuwulutsa pawailesi, mutatha kugwiritsa ntchito fyuluta yoyenera ya RF, kusokoneza kwa ma siginecha komwe kumapangidwa ndi njira yolumikizirana kumatha kutetezedwa mosavuta, kuti mtundu wa ma frequency ofunikira ukhalebe.

 

  • Pewani kusokoneza pafupipafupi - Mwachitsanzo, kulumikizana ndi mafoni kumafunika kuchuluka kwa ma frequency kuti agwire bwino ntchito. Ngati palibe fyuluta yoyenera ya RF, ma siginecha amagulu osiyanasiyana amafupipafupi sangathe kupereka ntchito nthawi imodzi, kuphatikiza Global Navigation Satellite System, chitetezo cha anthu, Wi-Fi, ndi zina zambiri.

 

Mwachidule, imatha kuwonjezera kuchuluka kwa ma siginoloji a ma frequency ofunikira mu siginecha ya wailesi popondereza chizindikiro cha ma frequency ena, kuti apititse patsogolo kukhulupirika kwa ma wayilesi.

 

Kutsiliza

 

Kodi mukuyendetsa wailesi yanuyanu? Ndipo kodi muyenera kugula zosefera zoyenera za zida zanu zowulutsira pawayilesi? Zosefera za RF zochokera ku FMUSER ndi zosankha zanu zabwino kwambiri! Monga katswiri wothandizira zida za wailesi, timapereka mitundu yonse yapamwamba kwambiri zongokhala chete ndipo adzakupatsani mayankho otsika mtengo malinga ndi momwe mulili. Ngati muli ndi zosowa zilizonse pawailesi yakanema, chonde khalani omasuka Lumikizanani nafe.

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