Iyi nkuru isobanura imiterere ya RF converter, hamwe n'ibishushanyo mbonera bya block, isobanura imiterere ya RF upconverter n'imiterere ya RF downconverter. Ivuga ibice bya frequency bikoreshwa muri iyi C-band frequency converter. Igishushanyo gikorerwa kuri microstrip board hakoreshejwe ibice bya RF bitandukanye nka RF mixers, local oscillators, MMICs, synthesizers, OCXO reference oscillators, attenuator pads, nibindi.
Igishushanyo mbonera cy'ihinduranya ry'amajwi (RF up converter)
Ihindura ry'amajwi rya RF risobanura guhindura frequency kuva ku gaciro kamwe ujya ku kandi. Igikoresho gihindura frequency kuva ku gaciro gato ukajya ku gaciro gakomeye kizwi nka up converter. Kubera ko ikora kuri radio frequencies izwi nka RF up converter. Iyi module ya RF Up converter ihindura frequency ya IF iri hagati ya 52 na 88 MHz kugera kuri RF frequencies ya 5925 kugeza 6425 GHz. Bityo izwi nka C-band up converter. Ikoreshwa nk'igice kimwe cya RF transceiver gikoreshwa muri VSAT ikoreshwa mu itumanaho rya satelite.
Igishushanyo-1: Ishusho y'agace k'ihindura ry'amakuru (RF up converter block diagram)
Reka turebe imiterere y'igice cya RF Up converter hamwe n'ubuyobozi bw'intambwe ku yindi.
Intambwe ya 1: Shaka Mixers, Local oscillator, MMICs, synthesizer, OCXO reference oscillator, attenuator pads ziboneka muri rusange.
Intambwe ya 2: Kora ibarura ry'urwego rw'ingufu mu byiciro bitandukanye by'umurongo cyane cyane ku buryo MMIC zitazarenza aho igikoresho gikandagira cya 1dB.
Intambwe ya 3: Gushushanya no gutunganya amafiriti ashingiye kuri Micro strip mu byiciro bitandukanye kugira ngo asukure imirongo idakenewe nyuma y’amafiriti avanze mu gishushanyo mbonera hashingiwe ku gice cy’umurongo wifuza kunyuramo.
Intambwe ya 4: Kora simulation ukoresheje microwave office cyangwa agent HP EEs zifite ubugari bukwiye bw'umuyoboro w'amashanyarazi nk'uko bisabwa ahantu hatandukanye kuri PCB kugira ngo ubone dielectric yatoranijwe nk'uko bisabwa kuri frequency ya RF carrier. Ntiwibagirwe gukoresha ibikoresho byo kurinda nk'aho bifungiye mu gihe cyo simulation. Reba ibipimo bya S.
Intambwe ya 5: Shaka PCB ikoreshwe kandi ushode ibice byaguzwe hanyuma ushode kimwe.
Nkuko bigaragara ku gishushanyo mbonera cy'ishusho ya 1, udupapuro twa attenuator dukwiye twa 3 dB cyangwa 6dB tugomba gukoreshwa hagati yatwo kugira ngo twite ku gice cyo gukanda cya 1dB cy'ibikoresho (MMICs na Mixers).
Oscillator yo mu gace hamwe na Synthesizer by'imirongo ikwiye bigomba gukoreshwa hashingiwe ku ihinduka rya 70MHz kugeza kuri C band, LO ya 1112.5 MHz na Synthesizer ya 4680-5375MHz ni byiza. Itegeko ry'ibanze mu guhitamo mixer ni uko imbaraga za LO zigomba kuba 10 dB zirenze urugero rw'ikimenyetso cyo hejuru cyane kuri P1dB. GCN ni Gain Control Network yakozwe hakoreshejwe PIN diode attenuators zihindura attenuation hashingiwe kuri voltage ya analog. Wibuke gukoresha Band Pass na Low pass filters igihe cyose bikenewe kugira ngo uvanemo frequencies zidakenewe kandi unyure frequencies zikenewe.
Igishushanyo mbonera cya RF Down converter
Igikoresho gihindura umurongo uva ku gaciro ko hejuru ukajya ku gaciro ko hasi kizwi nka "down converter". Kubera ko gikora kuri radiyo kizwi nka "RF down converter". Reka turebe imiterere ya "RF down converter" hamwe n'intambwe ku yindi. Iyi module ya "RF down converter" ihindura umurongo uva kuri 3700 kugeza kuri 4200 MHz ukajya kuri IF mu rugero ruva kuri 52 kugeza kuri 88 MHz. Bityo kizwi nka "C-band down converter".
Igishushanyo-2: Ishusho y'agace k'imashini ihindura RF hasi
Ishusho-2 igaragaza igishushanyo mbonera cy'igice cya C band down converter gikoresha ibice bya RF. Reka turebe imiterere y'igice cya RF down converter hamwe n'intambwe ku yindi.
Intambwe ya 1: Hatoranijwe imvange ebyiri za RF hakurikijwe igishushanyo cya Heterodyne gihindura umurongo wa RF kuva kuri 4 GHz kugera kuri 1GHz no kuva kuri 1 GHz kugera kuri 70 MHz. Imvange ya RF ikoreshwa muri icyo gishushanyo ni MC24M naho imvange ya IF ni TUF-5H.
Intambwe ya 2: Hakozwe filters zikwiye kugira ngo zikoreshwe mu byiciro bitandukanye bya RF down converter. Muri zo harimo 3700 kugeza 4200 MHz BPF, 1042.5 +/- 18 MHz BPF na 52 kugeza 88 MHz LPF.
Intambwe ya 3: Ama-IC ya amplifier ya MMIC na pads za attenuation bikoreshwa ahantu hakwiye nk'uko bigaragara ku gishushanyo mbonera cy'ibumba kugira ngo bihuze n'urwego rw'ingufu ku musaruro n'ibyinjira by'ibikoresho. Ibi bitoranywa hakurikijwe inyungu n'igipimo cya 1 dB cyo gukanda gisabwa na RF down converter.
Intambwe ya 4: Synthesizer ya RF na LO bikoreshwa mu gushushanya converter yazamuwe nabyo bikoreshwa mu gushushanya converter yazamuwe nk'uko bigaragazwa.
Intambwe ya 5: Ibice bitandukanya RF bikoreshwa ahantu hakwiye kugira ngo ikimenyetso cya RF kijye mu cyerekezo kimwe (ni ukuvuga imbere) kandi bihagarike RF reflection yayo mu cyerekezo cyo inyuma. Bityo izwi nka uni-directional device. GCN isobanura Gain control network. GCN ikora nk'igikoresho gihinduka cyo kugabanya amashanyarazi gitanga ubushobozi bwo gushyiraho RF output nk'uko byifuzwa n'ingengo y'imari ya RF link.
Umwanzuro: Kimwe n'ibivugwa muri ubu buryo bwo guhindura frequency za RF, umuntu ashobora gushushanya frequencies ku zindi frequencies nka L band, Ku band na mmwave band.
Igihe cyo kohereza: Ukuboza-07-2023
