Lesi sihloko sichaza umklamo wokuguqula i-RF, kanye nemidwebo yamabhulokhi, sichaza umklamo wokuguqula i-RF kanye nomklamo wokuguqula i-RF downconverter. Sikhuluma ngezingxenye zemvamisa ezisetshenziswa kulesi siguquli semvamisa ye-C-band. Umklamo wenziwa ebhodini le-microstrip kusetshenziswa izingxenye ze-RF ezihlukile njengezixube ze-RF, ama-oscillator endawo, ama-MMIC, ama-synthesizer, ama-oscillator okubhekisela e-OCXO, ama-attenuator pads, njll.
Umklamo wesiguquli se-RF up
Isiguquli semvamisa ye-RF sibhekisela ekuguqulweni kwemvamisa kusuka kwelinye inani kuya kwelinye. Idivayisi eguqula imvamisa kusuka enanini eliphansi kuya kweliphezulu yaziwa ngokuthi i-up converter. Njengoba isebenza kumaza omsakazo yaziwa ngokuthi i-RF up converter. Le module yesiguquli ye-RF Up ihumusha imvamisa ye-IF ebangeni eliphakathi kuka-52 kuya ku-88 MHz kuya kumaza e-RF angaba ngu-5925 kuya ku-6425 GHz. Ngakho-ke yaziwa ngokuthi i-C-band up converter. Isetshenziswa njengengxenye eyodwa ye-RF transceiver esetshenziswa ku-VSAT esetshenziselwa izinhlelo zokuxhumana zesathelayithi.
Umfanekiso-1: Umdwebo webhulokhi lokuguqula i-RF up
Ake sibone ukwakheka kwengxenye yesiguquli se-RF Up enesiqondiso sesinyathelo ngesinyathelo.
Isinyathelo 1: Thola ama-Mixers, i-Local oscillator, ama-MMIC, i-synthesizer, i-OCXO reference oscillator, ama-attenuator pads atholakalayo ngokuvamile.
Isinyathelo 2: Yenza ukubalwa kwezinga lamandla ezigabeni ezahlukene zohlu ikakhulukazi ekufakweni kwe-MMICs ukuze kungadluli iphuzu lokucindezela ledivayisi elingu-1dB.
Isinyathelo 3: Dizayina futhi ulungise izihlungi ezisekelwe ku-Micro strip ezigabeni ezahlukene ukuze uhlunge amaza angafuneki ngemva kwama-mixer ekwakhiweni ngokusekelwe engxenyeni yebanga lemvamisa ofuna ukuyidlula.
Isinyathelo 4: Yenza ukulingisa usebenzisa ihhovisi le-microwave noma ama-HP EE asebenza kahle anobubanzi obufanele bomqhubi njengoba kudingeka ezindaweni ezahlukene ku-PCB ukuze uthole i-dielectric ekhethiwe njengoba kudingeka ku-RF carrier frequency. Ungakhohlwa ukusebenzisa izinto zokuvikela njenge-enclosure ngesikhathi sokulingisa. Hlola amapharamitha e-S.
Isinyathelo 5: Thola i-PCB eyenziwe futhi ihlanganiswe ne-solder izingxenye ezithengiwe bese uyihlanganisa ne-solder efanayo.
Njengoba kuboniswe kumdwebo webhlokhi wesithombe-1, ama-attenuator pad afanele angama-3 dB noma ama-6dB adinga ukusetshenziswa phakathi kwawo ukuze kunakekelwe iphuzu lokucindezela elingu-1dB lamadivayisi (ama-MMIC nama-Mixers).
I-oscillator yendawo kanye ne-Synthesizer yamafrikhwensi afanele kudingeka kusetshenziswe ngokusekelwe. Ukuze kuguqulwe ibhendi engu-70MHz ibe yi-C, kunconywa i-LO ye-1112.5 MHz kanye ne-Synthesizer yebanga lamafrikhwensi angu-4680-5375MHz. Umthetho oyinhloko wokukhetha i-mixer ukuthi amandla e-LO kufanele abe yi-10 dB enkulu kunezinga lesignali yokufaka eliphakeme kakhulu ku-P1dB. I-GCN iyi-Gain Control Network eklanyelwe kusetshenziswa ama-PIN diode attenuators ahluka ngokunciphisa ngokusekelwe ku-voltage ye-analog. Khumbula ukusebenzisa izihlungi ze-Band Pass kanye ne-Low pass lapho kudingeka khona ukuhlunga amafrikhwensi angafuneki nokudlulisa amafrikhwensi afunwayo.
Umklamo wokuguqula i-RF Down
Idivayisi eguqula imvamisa kusuka enanini eliphezulu kuya enanini eliphansi yaziwa ngokuthi i-down converter. Njengoba isebenza kuma-radio frequency yaziwa ngokuthi i-RF down converter. Ake sibone ukwakheka kwengxenye ye-RF down converter enesiqondiso sesinyathelo ngesinyathelo. Le module ye-RF down converter ihumusha imvamisa ye-RF ebangeni elisukela ku-3700 kuya ku-4200 MHz kuya kuma-IF frequency ebangeni elisukela ku-52 kuya ku-88 MHz. Ngakho-ke yaziwa ngokuthi i-C-band down converter.
Umfanekiso-2: Umdwebo webhulokhi yesiguquli se-RF phansi
Isithombe-2 sibonisa umdwebo webhlokhi wesiguquli se-C band down sisebenzisa izingxenye ze-RF. Ake sibone ukwakheka kwengxenye yesiguquli se-RF down kanye nomhlahlandlela wesinyathelo ngesinyathelo.
Isinyathelo 1: Kukhethwe ama-mixer amabili e-RF ngokomklamo we-Heterodyne oguqula imvamisa ye-RF kusuka ku-4 GHz kuya ku-1GHz kanye nobubanzi obuvela ku-1 GHz kuya ku-70 MHz. I-mixer ye-RF esetshenziswa ekwakhiweni yi-MC24M kanti i-IF mixer yi-TUF-5H.
Isinyathelo 2: Izihlungi ezifanele zenzelwe ukusetshenziswa ezigabeni ezahlukene zesiguquli se-RF down. Lokhu kufaka phakathi i-3700 kuya ku-4200 MHz BPF, i-1042.5 +/- 18 MHz BPF kanye ne-52 kuya ku-88 MHz LPF.
Isinyathelo 3: Ama-IC e-amplifier ye-MMIC kanye nama-attenuation pads asetshenziswa ezindaweni ezifanele njengoba kuboniswe kumdwebo webhlokhi ukuze kuhlangatshezwane namazinga amandla ekuphumeni nasekufakweni kwamadivayisi. Lokhu kukhethwa ngokwesilinganiso kanye nesidingo sephuzu lokucindezela esingu-1 dB se-RF down converter.
Isinyathelo 4: I-RF synthesizer kanye ne-LO ezisetshenziswa ekwakhiweni kwe-up converter nazo ziyasetshenziswa ekwakhiweni kwe-down converter njengoba kuboniswe.
Isinyathelo 5: Ama-RF isolators asetshenziswa ezindaweni ezifanele ukuvumela isignali ye-RF ukuthi idlule ohlangothini olulodwa (okungukuthi phambili) nokumisa ukubonakaliswa kwayo kwe-RF ohlangothini olubuyela emuva. Ngakho-ke yaziwa njengedivayisi eqondisa uni-directional. I-GCN imele inethiwekhi yokulawula i-Gain. I-GCN isebenza njengedivayisi yokunciphisa okuguquguqukayo evumela ukusetha kokukhipha kwe-RF njengoba kufunwa yisabelomali sesixhumanisi se-RF.
Isiphetho: Njengemiqondo eshiwo kulo mklamo wokuguqula imvamisa ye-RF, umuntu angaklama abaguquli bemvamisa kwamanye amaza afana ne-L band, i-Ku band kanye ne-mmwave band.
Isikhathi sokuthunyelwe: Disemba-07-2023
