Nkhaniyi ikufotokoza kapangidwe ka RF converter, pamodzi ndi ma block diagram, pofotokoza kapangidwe ka RF upconverter ndi kapangidwe ka RF downconverter. Ikufotokoza za zigawo za pafupipafupi zomwe zimagwiritsidwa ntchito mu C-band frequency converter iyi. Kapangidwe kake kamachitika pa bolodi la microstrip pogwiritsa ntchito zigawo za RF zosiyana monga RF mixers, local oscillators, MMICs, synthesizers, OCXO reference oscillators, attenuator pads, ndi zina zotero.
Kapangidwe ka chosinthira cha RF up
Chosinthira ma frequency a RF chimatanthauza kusintha kwa ma frequency kuchokera pamtengo umodzi kupita ku wina. Chipangizo chomwe chimasintha ma frequency kuchoka pamtengo wotsika kupita pamtengo wapamwamba chimadziwika kuti chosinthira ma frequency. Popeza chimagwira ntchito pama radio frequency chimadziwika kuti chosinthira ma RF up. Module iyi yosinthira ma RF Up imamasulira ma frequency a IF omwe ali pakati pa 52 mpaka 88 MHz kupita ku ma RF frequency a pafupifupi 5925 mpaka 6425 GHz. Chifukwa chake chimadziwika kuti chosinthira ma C-band up. Chimagwiritsidwa ntchito ngati gawo limodzi la RF transceiver yomwe imagwiritsidwa ntchito mu VSAT yomwe imagwiritsidwa ntchito polumikizirana ndi satellite.
Chithunzi-1: Chithunzi cha RF up converter block
Tiyeni tiwone kapangidwe ka gawo la RF Up converter ndi kalozera wa sitepe ndi sitepe.
Gawo 1: Dziwani Zosakaniza, Zozungulira, Ma MMIC, Synthesizer, Ma OCXO Reference Oscillator, Ma Attenuator Pads omwe amapezeka nthawi zambiri.
Gawo 2: Chitani kuwerengera mphamvu pamlingo wosiyanasiyana wa mzerewu makamaka poika ma MMIC kuti asapitirire 1dB compression point ya chipangizocho.
Gawo 3: Pangani ndi kukonza zosefera zochokera ku Micro strip pazigawo zosiyanasiyana kuti musefe ma frequency osafunikira pambuyo pa osakaniza mu kapangidwe kake kutengera gawo la ma frequency omwe mukufuna kudutsa.
Gawo 4: Chitani chitsanzo pogwiritsa ntchito ofesi ya microwave kapena agent HP EEs yokhala ndi mulifupi woyenera wa conductor monga momwe zimafunikira m'malo osiyanasiyana pa PCB kuti mupeze dielectric yosankhidwa monga momwe zimafunikira pa RF carrier frequency. Musaiwale kugwiritsa ntchito zotchingira ngati chotchingira panthawi yoyeserera. Yang'anani magawo a S.
Gawo 5: Pezani PCB yopangidwa ndikusokedwa ndi zinthu zomwe zagulidwa ndikusokedwanso chimodzimodzi.
Monga momwe zasonyezedwera pachithunzi cha buloko cha chithunzi-1, ma attenuator pads oyenera a 3 dB kapena 6dB ayenera kugwiritsidwa ntchito pakati pawo kuti asamalire malo opanikizika a 1dB pazida (MMICs ndi Mixers).
Chosinthira mafunde chapafupi ndi chosinthira mafunde choyenera chiyenera kugwiritsidwa ntchito kutengera mphamvu ya mafunde a 70MHz kupita ku C band. Pakusintha kwa mafunde a 70MHz kupita ku C band, LO ya 1112.5 MHz ndi Synthesizer ya 4680-5375MHz ndi yabwino kwambiri. Lamulo lofunikira posankha chosakaniza ndilakuti mphamvu ya LO iyenera kukhala 10 dB kuposa mulingo wapamwamba kwambiri wa chizindikiro cholowera pa P1dB. GCN ndi Gain Control Network yopangidwa pogwiritsa ntchito ma PIN diode attenuators omwe amasiyana mphamvu ya mafunde kutengera mphamvu ya analog. Kumbukirani kugwiritsa ntchito ma filter a Band Pass ndi Low pass ngati pakufunika kuti muchotse mafunde osafunikira ndikudutsa mafunde omwe mukufuna.
Kapangidwe ka chosinthira cha RF Down
Chipangizo chomwe chimasintha ma frequency kuchoka pamtengo wapamwamba kupita pamtengo wotsika chimadziwika kuti down converter. Popeza chimagwira ntchito pama radio frequency chimadziwika kuti RF down converter. Tiyeni tiwone kapangidwe ka RF down converter gawo limodzi ndi chitsogozo cha sitepe ndi sitepe. Gawoli la RF down converter limamasulira ma frequency a RF kuyambira 3700 mpaka 4200 MHz mpaka IF kuyambira 52 mpaka 88 MHz. Chifukwa chake chimadziwika kuti C-band down converter.
Chithunzi-2: Chithunzi cha RF down converter block
Chithunzi-2 chikuwonetsa chithunzi cha block cha C band down converter pogwiritsa ntchito zigawo za RF. Tiyeni tiwone kapangidwe ka gawo la RF down converter ndi malangizo a sitepe ndi sitepe.
Gawo 1: Zosakaniza ziwiri za RF zasankhidwa malinga ndi kapangidwe ka Heterodyne komwe kamasintha ma frequency a RF kuchokera pa 4 GHz kupita ku 1GHz komanso kuchokera pa 1 GHz kupita ku 70 MHz. Chosakaniza cha RF chomwe chimagwiritsidwa ntchito popanga ndi MC24M ndipo chosakaniza cha IF ndi TUF-5H.
Gawo 2: Zosefera zoyenera zapangidwa kuti zigwiritsidwe ntchito pazigawo zosiyanasiyana za RF down converter. Izi zikuphatikizapo 3700 mpaka 4200 MHz BPF, 1042.5 +/- 18 MHz BPF ndi 52 mpaka 88 MHz LPF.
Gawo 3: Ma IC amplifier a MMIC ndi ma attenuation pads amagwiritsidwa ntchito pamalo oyenera monga momwe zasonyezedwera pachithunzi cha block kuti akwaniritse mphamvu zomwe zimagwiritsidwa ntchito popanga ndi kulowetsa zida. Izi zimasankhidwa malinga ndi kufunikira kwa 1 dB compression point ya RF down converter.
Gawo 4: RF synthesizer ndi LO zomwe zimagwiritsidwa ntchito popanga chosinthira chammwamba zimagwiritsidwanso ntchito popanga chosinthira cham'munsi monga momwe zasonyezedwera.
Gawo 5: Ma RF isolators amagwiritsidwa ntchito pamalo oyenera kuti chizindikiro cha RF chidutse mbali imodzi (monga kutsogolo) ndikuyimitsa kuwunikira kwake kwa RF kumbuyo. Chifukwa chake chimadziwika kuti chipangizo cholunjika chimodzi. GCN imayimira netiweki yolamulira ya Gain. GCN imagwira ntchito ngati chipangizo chochepetsera mphamvu chomwe chimalola kukhazikitsa kutulutsa kwa RF monga momwe bajeti ya RF link ikufunira.
Kutsiliza: Mofanana ndi mfundo zomwe zatchulidwa mu kapangidwe ka RF frequency converter, munthu akhoza kupanga ma frequency converter pama frequency ena monga L band, Ku band ndi mmwave band.
Nthawi yotumizira: Dec-07-2023
