Nkhaniyi ikufotokoza mapangidwe a RF converter, pamodzi ndi zithunzi za block, kufotokoza mapangidwe a RF upconverter ndi mapangidwe a RF downconverter.Imatchula zigawo zafupipafupi zomwe zimagwiritsidwa ntchito mu C-band frequency converter.Mapangidwe ake amapangidwa pa bolodi la microstrip pogwiritsa ntchito zida za RF zosakanikirana monga zosakaniza za RF, ma oscillator am'deralo, ma MMIC, ma synthesizer, ma OCXO oscillators, ma attenuator pads, ndi zina zambiri.
RF up Converter design
RF frequency converter imatanthawuza kutembenuka kwa ma frequency kuchokera pamtengo wina kupita ku wina.Chipangizo chomwe chimasintha pafupipafupi kuchoka pamtengo wotsika kupita pamtengo wapamwamba chimatchedwa up converter.Momwe imagwira ntchito pamawayilesi amadziwika kuti RF up converter.Module iyi yosinthira RF Up imamasulira ma frequency a IF pafupifupi 52 mpaka 88 MHz kupita ku RF pafupipafupi pafupifupi 5925 mpaka 6425 GHz.Chifukwa chake amadziwika kuti C-band up converter.Imagwiritsidwa ntchito ngati gawo limodzi la RF transceiver yomwe idayikidwa mu VSAT yomwe imagwiritsidwa ntchito polumikizana ndi satellite.
Chithunzi-1: Chithunzi cha RF up converter block
Tiyeni tiwone kapangidwe ka RF Up Converter gawo ndi sitepe ndi sitepe kalozera.
Khwerero 1: Pezani Zosakaniza, Oscillator Yam'deralo, MMICs, synthesizer, OCXO reference oscillator, ma attenuator pads omwe amapezeka nthawi zambiri.
Khwerero 2: Chitani mawerengedwe a mphamvu yamagetsi pazigawo zosiyanasiyana za mzere makamaka polowetsa ma MMIC kuti asapitirire 1dB kuponderezedwa kwa chipangizocho.
Khwerero 3: Pangani ndi zosefera zoyenera za Micro strip pamagawo osiyanasiyana kuti musefa ma frequency osafunikira pambuyo pa zosakaniza pamapangidwe kutengera gawo la ma frequency omwe mukufuna kudutsa.
Khwerero 4: Chitani zoyerekeza pogwiritsa ntchito microwave ofesi kapena agilent HP EEsof ndi makulidwe oyenera kondakitala monga zimafunika m'malo osiyanasiyana pa PCB kwa osankhidwa dielectric monga zimafunika RF chonyamulira pafupipafupi.Musaiwale kugwiritsa ntchito zinthu zotchinga ngati mpanda poyerekezera.Onani magawo a S.
Khwerero 5: Pezani PCB yopangidwa ndikugulitsa zinthu zomwe zagulidwa ndikugulitsanso chimodzimodzi.
Monga momwe zasonyezedwera pachithunzi cha chipika-1, zoyambukira zoyamwitsa zoyankhulirana zoyenerera za 3 dB kapena 6dB ziyenera kugwiritsidwa ntchito pakati kuti zisamalire malo opondereza a 1dB a zida (MMICs ndi Mixers).
Local oscillator ndi Synthesizer ya ma frequency oyenerera ayenera kugwiritsidwa ntchito potengera.Pakusintha kwa 70MHz kupita ku C, LO ya 1112.5 MHz ndi Synthesizer ya 4680-5375MHz ma frequency akulimbikitsidwa.Lamulo la chala chakusankha chosakanizira ndikuti mphamvu ya LO iyenera kukhala 10 dB yayikulu kuposa mulingo wapamwamba kwambiri wa siginecha pa P1dB.GCN ndi Gain Control Network yopangidwa pogwiritsa ntchito ma PIN diode attenuators omwe amasinthasintha kutengera mphamvu ya analogi.Kumbukirani kugwiritsa ntchito zosefera za Band Pass ndi Low pass ngati zikufunika kusefa ma frequency osafunikira ndikudutsa ma frequency omwe mukufuna.
RF Down Converter kapangidwe
Chipangizo chomwe chimasintha pafupipafupi kuchokera pamtengo wapamwamba kupita pamtengo wotsika chimatchedwa down converter.Momwe imagwira ntchito pamawayilesi amadziwika kuti RF down converter.Tiyeni tiwone kapangidwe ka RF pansi Converter gawo ndi sitepe ndi sitepe kalozera.RF down converter module iyi imamasulira ma frequency a RF kuchokera ku 3700 mpaka 4200 MHz kupita ku IF ma frequency osiyanasiyana kuyambira 52 mpaka 88 MHz.Chifukwa chake amadziwika kuti C-band down converter.
Chithunzi-2: Chithunzi cha RF pansi chosinthira chosinthira
Chithunzi-2 chikuwonetsa chosinthira cha C band down chogwiritsa ntchito zida za RF.Tiyeni tiwone kapangidwe ka RF pansi Converter gawo ndi sitepe ndi sitepe kalozera.
Khwerero 1: Zosakaniza ziwiri za RF zasankhidwa malinga ndi kapangidwe ka Heterodyne komwe kumasintha ma frequency a RF kuchokera ku 4 GHz kupita ku 1GHz osiyanasiyana komanso kuchokera ku 1 GHz mpaka 70 MHz.Chosakaniza cha RF chomwe chimagwiritsidwa ntchito popanga ndi MC24M ndi IF chosakanizira ndi TUF-5H.
Khwerero 2: Zosefera zoyenera zidapangidwa kuti zizigwiritsidwa ntchito pamagawo osiyanasiyana a RF pansi Converter.Izi zikuphatikiza 3700 mpaka 4200 MHz BPF, 1042.5 +/- 18 MHz BPF ndi 52 mpaka 88 MHz LPF.
Khwerero 3: Ma MMIC amplifier ICs ndi ma attenuation pads amagwiritsidwa ntchito pamalo oyenerera monga momwe zasonyezedwera pachithunzichi kuti zigwirizane ndi kuchuluka kwa mphamvu pakutulutsa ndi kuyika kwa zida.Izi zimasankhidwa malinga ndi phindu ndi 1 dB compression point point ya RF down converter.
Khwerero 4: RF synthesizer ndi LO zomwe zimagwiritsidwa ntchito muzosinthira zosinthira zimagwiritsidwanso ntchito pamapangidwe osinthira otsika monga momwe zasonyezedwera.
Khwerero 5: Zodzipatula za RF zimagwiritsidwa ntchito m'malo oyenera kulola chizindikiro cha RF kudutsa mbali imodzi (ie kutsogolo) ndikuyimitsa kuwonetsera kwake kumbuyo.Chifukwa chake chimadziwika kuti chipangizo cha uni-directional.GCN imayimira Gain control network.GCN imagwira ntchito ngati chipangizo choyimitsa chosinthika chomwe chimalola kukhazikitsidwa kwa RF monga momwe amafunira ndi bajeti ya ulalo wa RF.
Kutsiliza: Mofanana ndi malingaliro omwe atchulidwa pamapangidwe a RF frequency converter, munthu amatha kupanga ma frequency converter pama frequency ena monga L band, Ku band ndi mmwave band.
Nthawi yotumiza: Dec-07-2023
