Kab lus no piav qhia txog RF converter tsim, nrog rau daim duab thaiv, piav qhia RF upconverter tsim thiab RF downconverter tsim. Nws hais txog cov khoom siv zaus siv hauv C-band zaus converter. Tus tsim yog nqa tawm ntawm lub microstrip board siv discrete RF Cheebtsam xws li RF mixers, zos oscillators, MMICs, synthesizers, OCXO siv oscillators, attenuator pads, thiab lwm yam.
RF up converter tsim
RF zaus converter hais txog kev hloov pauv ntawm zaus ntawm ib tus nqi mus rau lwm qhov. Cov cuab yeej uas hloov zaus los ntawm tus nqi qis rau tus nqi siab yog hu ua up converter. Raws li nws ua haujlwm ntawm xov tooj cua zaus nws yog hu ua RF up converter. Qhov no RF Up converter module txhais IF zaus nyob rau hauv thaj tsam ntawm 52 txog 88 MHz rau RF zaus ntawm 5925 txog 6425 GHz. Li no nws yog lub npe hu ua C-band up converter. Nws yog siv los ua ib feem ntawm RF transceiver xa mus rau hauv VSAT siv rau kev sib txuas lus satellite.
Daim duab-1: RF up converter thaiv daim duab
Cia peb pom tus tsim ntawm RF Up converter ib feem nrog cov kauj ruam yog kauj ruam qhia.
Kauj Ruam 1: Nrhiav cov khoom sib xyaw, Cov oscillator hauv zos, MMICs, cov khoom siv hluav taws xob, OCXO siv oscillator, attenuator pads feem ntau muaj.
Kauj Ruam 2: Ua qhov ntsuas fais fab ntawm ntau theem ntawm cov kab tshwj xeeb ntawm cov tswv yim ntawm MMICs xws li tias nws yuav tsis pub dhau 1dB compression point ntawm lub cuab yeej.
Kauj Ruam 3: Tsim thiab tsim cov Micro strips raws li cov ntxaij lim dej ntawm ntau theem los lim tawm qhov tsis xav tau ntau zaus tom qab cov khoom sib xyaw hauv kev tsim raws li qhov twg ntawm qhov ntau zaus koj xav kom dhau.
Kauj Ruam 4: Ua qhov simulation siv microwave chaw ua haujlwm lossis agilent HP EEsof nrog cov neeg xyuas pib dav raws li qhov xav tau ntawm ntau qhov chaw ntawm PCB rau kev xaiv dielectric raws li qhov yuav tsum tau muaj rau RF cov cab kuj zaus. Tsis txhob hnov qab siv cov ntaub thaiv npog los tiv thaiv thaum lub sijhawm simulation. Txheeb xyuas qhov ntsuas S.
Kauj Ruam 5: Tau txais PCB fabricated thiab solder cov khoom yuav thiab solder tib yam.
Raws li tau piav qhia hauv daim duab thaiv ntawm daim duab-1, qhov tsim nyog attenuator pads ntawm 3 dB lossis 6dB yuav tsum tau siv nyob rau hauv nruab nrab los saib xyuas 1dB compression point ntawm cov khoom siv (MMICs thiab Mixers).
Local oscillator thiab Synthesizer ntawm cov zaus tsim nyog yuav tsum tau siv raws li. Rau 70MHz rau C band hloov dua siab tshiab, LO ntawm 1112.5 MHz thiab Synthesizer ntawm 4680-5375MHz zaus yog pom zoo. Txoj cai ntawm tus ntiv tes xoo rau kev xaiv cov khoom sib tov yog LO lub zog yuav tsum yog 10 dB ntau dua li qhov siab tshaj plaws input teeb liab theem ntawm P1dB. GCN yog Gain Control Network tsim siv tus PIN diode attenuators uas sib txawv attenuation raws li analog voltage. Nco ntsoov siv Band Pass thiab Low pass lim raws li thiab thaum yuav tsum tau lim tawm cov zaus tsis xav tau thiab dhau qhov xav tau ntau zaus.
RF Down converter tsim
Cov cuab yeej uas hloov zaus los ntawm tus nqi siab mus rau tus nqi qis yog hu ua down converter. Raws li nws ua haujlwm ntawm xov tooj cua zaus nws hu ua RF down converter. Cia peb pom tus tsim ntawm RF down converter ib feem nrog cov kauj ruam yog kauj ruam qhia. Qhov no RF down converter module txhais RF zaus nyob rau hauv qhov ntau ntawm 3700 mus rau 4200 MHz rau IF zaus nyob rau hauv qhov ntau ntawm 52 mus rau 88 MHz. Li no nws yog hu ua C-band down converter.
Daim duab-2: RF down converter thaiv daim duab
Daim duab-2 qhia txog daim duab thaiv ntawm C band down converter siv cov khoom RF. Cia peb pom tus tsim ntawm RF down converter ib feem nrog cov kauj ruam yog kauj ruam qhia.
Kauj ruam 1: Ob lub RF mixers tau raug xaiv raws li Heterodyne tsim uas hloov RF zaus ntawm 4 GHz mus rau 1GHz ntau thiab los ntawm 1 GHz mus rau 70 MHz ntau yam. RF tov khoom siv hauv kev tsim yog MC24M thiab IF tov khoom 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 yog siv rau ntawm qhov chaw tsim nyog raws li qhia hauv daim duab thaiv kom tau raws li qib zog ntawm cov zis thiab cov tswv yim ntawm cov khoom siv. Cov no yog xaiv raws li qhov nce thiab 1 dB compression point xav tau ntawm RF down converter.
Kauj ruam 4: RF synthesizer thiab LO siv nyob rau hauv lub up converter tsim kuj siv nyob rau hauv lub down converter tsim raws li qhia.
Kauj Ruam 5: RF cais tawm yog siv rau ntawm qhov chaw tsim nyog kom tso cai rau RF teeb liab hla mus rau hauv ib qho kev taw qhia (piv txwv li rau pem hauv ntej) thiab nres nws qhov kev xav ntawm RF nyob rau hauv txoj kev rov qab. Li no nws yog hu ua uni-directional ntaus ntawv. GCN sawv cev rau Gain tswj network. GCN ua haujlwm raws li qhov sib txawv attenuation ntaus ntawv uas tso cai rau kev teeb tsa ntawm RF tso zis raws li qhov xav tau los ntawm RF txuas pob nyiaj siv.
Xaus: Zoo ib yam li cov ntsiab lus tau hais hauv qhov tsim qauv RF zaus converter, ib tus tuaj yeem tsim cov zaus hloov pauv ntawm lwm zaus xws li L band, Ku band thiab mmwave band.
Post lub sij hawm: Dec-07-2023
