Lesi sihloko sichaza idizayini yesiguquli se-RF, kanye nemidwebo yebhulokhi, echaza ukwakheka kwe-RF upconverter kanye nomklamo we-RF downconverter.Isho izingxenye zefrikhwensi ezisetshenziswe kulesi siguquli sefrikhwensi ye-C-band.Umklamo wenziwa ebhodini le-microstrip kusetshenziswa izakhi ze-RF ezihlukene njengezixube ze-RF, ama-oscillator endawo, ama-MMIC, ama-synthesizer, ama-oscillator okubhekisela e-OCXO, ama-attenuator pad, njll.
I-RF up converter design
I-RF frequency converter isho ukuguqulwa kwemvamisa isuka kunani elilodwa iye kwelinye.Idivayisi eguqula imvamisa isuke kunani eliphansi iye kunani eliphezulu yaziwa ngokuthi isiguquli esiphezulu.Njengoba isebenza kumaza omsakazo yaziwa ngokuthi yi-RF up converter.Le mojula yokuguqula i-RF Up ihumusha imvamisa ye-IF ebangeni elingaba ngu-52 kuye ku-88 MHz ukuya kufrikhwensi ye-RF engaba ngu-5925 kuya ku-6425 GHz.Ngakho-ke yaziwa ngokuthi i-C-band up converter.Isetshenziswa njengengxenye eyodwa ye-RF transceiver efakwe ku-VSAT esetshenziselwa izinhlelo zokusebenza zokuxhumana ngesathelayithi.
Umfanekiso-1 : I-RF up converter block diagram
Ake sibone ukuklanywa kwengxenye yokuguqula i-RF Up ngesinyathelo ngesinyathelo.
Isinyathelo 1: Thola Izixube, i-oscillator yendawo, ama-MMICs, i-synthesizer, i-OCXO reference oscillator, amaphedi okufinyeza avame ukutholakala.
Isinyathelo sesi-2: Yenza isibalo sezinga lamandla ezigabeni ezihlukahlukene zohlelo ikakhulukazi kokokufaka kwe-MMICs kangangokuthi ngeke kudlule indawo yokuminyanisa engu-1dB yocingo.
Isinyathelo sesi-3: Dizayina futhi ulungise izihlungi ezifanele ezisekelwe emicu emincane ezigabeni ezahlukahlukene ukuze uhlunge amaza angafuneki ngemva kwama-mixer ekwakhiweni okusekelwe ekutheni iyiphi ingxenye yebanga lefrikhwensi ofuna ukuyidlula.
Isinyathelo sesi-4: Yenza ukulingisa usebenzisa ihhovisi le-microwave noma i-HP EEsof ekhaliphile enobubanzi obufanele bekhondatha njengoba kudingekile ezindaweni ezihlukahlukene ku-PCB ukuze uthole i-dielectric ekhethiwe njengoba kudingwa imvamisa yenkampani yenethiwekhi ye-RF.Ungakhohlwa ukusebenzisa okokuvikela njengendawo ebiyelwe ngesikhathi sokulingisa.Hlola amapharamitha we-S.
Isinyathelo sesi-5: Yenza i-PCB yenziwe futhi uthengise izinto ezithengiwe futhi uyidayise ngokufanayo.
Njengoba kubonisiwe kumdwebo webhulokhi womfanekiso-1, amaphedi okufinyeza afanelekile angaba ngu-3 dB noma u-6dB adinga ukusetshenziswa phakathi ukuze kunakekelwe iphuzu lokuminyanisa elingu-1dB lamadivayisi (ama-MMIC nama-Mixers).
I-oscillator yendawo kanye ne-Synthesizer yamafrikhwensi afanelekile kufanele isetshenziswe ngokusekelwe.Ngokuguqulwa kwebhendi engu-70MHz ukuya ku-C, i-LO ka-1112.5 MHz ne-Synthesizer yebanga lefrikhwensi engu-4680-5375MHz iyanconywa.Umthetho wesithupha wokukhetha i-mixer ukuthi amandla e-LO kufanele abe mkhulu ngo-10 dB kuneleveli yesiginali yokufaka ephezulu kakhulu ku-P1dB.I-GCN iGain Control Network eklanywe kusetshenziswa izibambisi ze-PIN diode ezishintshashintshayo ngokususelwe ku-analog voltage.Khumbula ukusebenzisa izihlungi ze-Band Pass kanye ne-Low pass njengoba nalapho kudingeka ukuze uhlunge amaza angafuneki futhi udlule amaza afunwayo.
RF Down Converter design
Idivayisi eguqula imvamisa isuka enanini eliphezulu iye kunani eliphansi yaziwa ngokuthi isiguquli esiphansi.Njengoba isebenza kumaza omsakazo yaziwa ngokuthi yi-RF down converter.Ake sibone ukwakheka kwe-RF down converter ingxenye enegayidi yesinyathelo ngesinyathelo.Le mojula ye-RF down converter ihumusha imvamisa ye-RF ebangeni isuka ku-3700 iye ku-4200 MHz iye ku-IF imvamisa ebangeni ukusuka ku-52 kuye ku-88 MHz.Ngakho-ke yaziwa ngokuthi i-C-band down converter.
Umfanekiso-2 : I-RF down converter block diagram
Umfanekiso-2 ubonisa umdwebo webhulokhi we-C band down converter esebenzisa izingxenye ze-RF.Ake sibone ukwakheka kwe-RF down converter ingxenye enegayidi yesinyathelo ngesinyathelo.
Isinyathelo 1: Izixube ezimbili ze-RF zikhethiwe ngokomklamo we-Heterodyne oguqula imvamisa ye-RF isuka ku-4 GHz iye ku-1GHz ububanzi futhi isuka ku-1 GHz iye ku-70 MHz ububanzi.I-RF mixer esetshenziswe ekwakhiweni i-MC24M futhi i-IF mixer yi-TUF-5H.
Isinyathelo sesi-2: Izihlungi ezifanele zenzelwe ukusetshenziswa ezigabeni ezihlukene ze-RF down converter.Lokhu kufaka phakathi 3700 kuya ku-4200 MHz BPF, 1042.5 +/- 18 MHz BPF kanye no-52 kuya ku-88 MHz LPF.
Isinyathelo sesi-3:Ama-IC we-MMIC amplifier namaphedi okuthobisa asetshenziswa ezindaweni ezifanele njengoba kuboniswe kumdwebo webhulokhi ukuhlangabezana namaleveli wamandla ekuphumeni nasekufakweni kwamadivayisi.Lawa akhethwa ngokwenzuzo ngayinye kanye nemfuneko yephoyinti lokucindezela elingu-1 dB lesiguquli se-RF phansi.
Isinyathelo sesi-4: I-RF synthesizer kanye ne-LO esetshenziswe ekwakhiweni kwesiguquli esiphezulu nazo zisetshenziswa ekwakhiweni kwesiguquli esiphansi njengoba kukhonjisiwe.
Isinyathelo sesi-5: Izihlukanisi ze-RF zisetshenziswa ezindaweni ezifanele ukuvumela isignali ye-RF ukuthi idlule ohlangothini olulodwa (okungukuthi ukuya phambili) nokumisa ukubonisa kwayo i-RF ibheke emuva.Ngakho-ke yaziwa ngokuthi i-uni-directional device.I-GCN imele Gain control network.I-GCN isebenza njengedivayisi eguquguqukayo evumela ukusetha okukhiphayo kwe-RF njengokufunwa yisabelomali sesixhumanisi se-RF.
Isiphetho: Ngokufana nemiqondo eshiwo kulo mklamo we-RF frequency converter, umuntu angaklama iziguquli zefrikhwensi kwamanye amafrikhwensi afana ne-L band, i-Ku band ne-mmwave band.
Isikhathi sokuthumela: Dec-07-2023
