Tsab xov xwm no piav qhia txog kev tsim RF converter, nrog rau cov duab kos, piav qhia txog kev tsim RF upconverter thiab RF downconverter. Nws hais txog cov khoom siv zaus siv hauv C-band frequency converter no. Kev tsim qauv yog ua tiav ntawm lub rooj tsavxwm microstrip siv cov khoom sib cais RF xws li RF mixers, local oscillators, MMICs, synthesizers, OCXO reference oscillators, attenuator pads, thiab lwm yam.
RF up converter tsim
Lub tshuab hloov zaus RF yog hais txog kev hloov zaus ntawm ib tus nqi mus rau lwm tus. Lub cuab yeej uas hloov zaus ntawm tus nqi qis mus rau tus nqi siab hu ua up converter. Raws li nws ua haujlwm ntawm cov zaus xov tooj cua nws hu ua RF up converter. Lub RF Up converter module no txhais IF zaus hauv qhov ntau ntawm li 52 txog 88 MHz rau RF zaus ntawm li 5925 txog 6425 GHz. Yog li ntawd nws hu ua C-band up converter. Nws yog siv ua ib feem ntawm RF transceiver xa mus rau hauv VSAT siv rau kev sib txuas lus satellite.
Daim Duab-1: Daim duab thaiv RF up converter
Cia peb saib qhov tsim ntawm RF Up converter ib feem nrog cov lus qhia ib kauj ruam zuj zus.
Kauj Ruam 1: Nrhiav cov Mixers, Local oscillator, MMICs, synthesizer, OCXO reference oscillator, attenuator pads feem ntau muaj.
Kauj Ruam 2: Ua qhov kev xam qib fais fab ntawm ntau theem ntawm cov kab tshwj xeeb tshaj yog ntawm qhov nkag ntawm MMICs kom nws yuav tsis pub tshaj 1dB qhov ntsuas ntawm lub cuab yeej.
Kauj Ruam 3: Tsim thiab tsim cov lim dej Micro strip kom raug ntawm ntau theem kom lim cov zaus tsis xav tau tom qab cov mixers hauv qhov tsim raws li qhov twg ntawm qhov zaus koj xav dhau.
Kauj Ruam 4: Ua qhov kev sim siv microwave chaw ua haujlwm lossis agilent HP EEsof nrog cov kab dav hlau raws li qhov xav tau ntawm ntau qhov chaw ntawm PCB rau dielectric xaiv raws li qhov xav tau rau RF carrier zaus. Tsis txhob hnov qab siv cov khoom siv tiv thaiv ua qhov chaw kaw thaum lub sijhawm simulation. Tshawb xyuas cov kev cai S.
Kauj Ruam 5: Tau txais PCB tsim thiab solder cov khoom yuav thiab solder tib yam.
Raws li tau piav qhia hauv daim duab thaiv ntawm daim duab-1, cov attenuator pads tsim nyog ntawm 3 dB lossis 6dB yuav tsum tau siv nyob nruab nrab los saib xyuas 1dB compression point ntawm cov khoom siv (MMICs thiab Mixers).
Yuav tsum siv lub oscillator hauv zos thiab Synthesizer ntawm cov zaus tsim nyog raws li. Rau kev hloov pauv 70MHz mus rau C band, LO ntawm 1112.5 MHz thiab Synthesizer ntawm 4680-5375MHz zaus ntau yam yog qhov pom zoo. Txoj cai ntawm tus ntiv tes xoo rau kev xaiv cov mixer yog lub zog LO yuav tsum yog 10 dB ntau dua li qib siab tshaj plaws ntawm P1dB. GCN yog Gain Control Network tsim los ntawm kev siv PIN diode attenuators uas hloov pauv attenuation raws li analog voltage. Nco ntsoov siv Band Pass thiab Low pass lim dej thaum twg xav tau los lim cov zaus tsis xav tau thiab dhau cov zaus xav tau.
RF Down converter tsim
Lub cuab yeej uas hloov zaus ntawm tus nqi siab mus rau tus nqi qis hu ua down converter. Raws li nws ua haujlwm ntawm cov zaus xov tooj cua nws hu ua RF down converter. Cia peb saib qhov tsim ntawm RF down converter ib feem nrog cov lus qhia ib kauj ruam zuj zus. Lub RF down converter module no txhais RF zaus hauv qhov ntau ntawm 3700 txog 4200 MHz rau IF zaus hauv qhov ntau ntawm 52 txog 88 MHz. Yog li ntawd nws hu ua C-band down converter.
Daim Duab-2: Daim duab thaiv RF down converter
Daim duab-2 qhia txog daim duab thaiv ntawm C band down converter siv cov khoom RF. Cia peb saib kev tsim ntawm RF down converter nrog cov lus qhia ib kauj ruam zuj zus.
Kauj Ruam 1: Ob lub RF mixers tau raug xaiv raws li Heterodyne tsim uas hloov RF zaus los ntawm 4 GHz mus rau 1GHz ntau thiab los ntawm 1 GHz mus rau 70 MHz ntau. Lub RF mixer siv hauv kev tsim yog MC24M thiab IF mixer yog TUF-5H.
Kauj Ruam 2: Cov lim dej tsim nyog tau tsim los siv rau ntau theem ntawm RF down converter. Qhov no suav nrog 3700 txog 4200 MHz BPF, 1042.5 +/- 18 MHz BPF thiab 52 txog 88 MHz LPF.
Kauj Ruam 3: MMIC amplifier ICs thiab attenuation pads siv rau ntawm qhov chaw tsim nyog raws li qhia hauv daim duab thaiv kom tau raws li cov theem fais fab ntawm qhov tso zis thiab qhov nkag ntawm cov khoom siv. Cov no raug xaiv raws li qhov nce thiab 1 dB compression point xav tau ntawm RF down converter.
Kauj Ruam 4: RF synthesizer thiab LO siv rau hauv qhov tsim up converter kuj siv rau hauv qhov tsim down converter raws li qhia.
Kauj Ruam 5: Cov khoom siv cais RF siv rau ntawm qhov chaw tsim nyog kom tso cai rau lub teeb liab RF hla mus rau hauv ib qho kev taw qhia (piv txwv li mus tom ntej) thiab kom nres nws qhov kev cuam tshuam RF hauv qhov kev taw qhia rov qab. Yog li ntawd nws hu ua lub cuab yeej uni-directional. GCN sawv cev rau Gain control network. GCN ua haujlwm ua lub cuab yeej hloov pauv uas tso cai rau kev teeb tsa ntawm RF tso zis raws li xav tau los ntawm RF txuas nyiaj txiag.
Xaus Lus: Zoo ib yam li cov ntsiab lus tau hais hauv qhov kev tsim qauv hloov pauv zaus RF no, ib tus tuaj yeem tsim cov hloov pauv zaus ntawm lwm qhov zaus xws li L band, Ku band thiab mmwave band.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-07-2023
