Ngaphandle kwesihlungi ekupheleni kwe-RF Front End, umphumela wokuthola uzoncishiswa kakhulu. Sikhulu kangakanani isaphulelo? Ngokuvamile, ngama-antenna amahle, ibanga lizoba okungenani izikhathi ezi-2 ezimbi. Futhi, i-antenna ephakeme, okubi kakhulu ukwamukela! Kungani kunjalo? Ngoba isibhakabhaka sanamuhla sigcwele amasiginali amaningi, lezi zimpawu zivimba i-tube yangaphambili etholayo. Njengoba isihlungi se-Front-End sibaluleke kakhulu, ungasenza kanjani isihlungi esingaphambili? Imboni ye-RF Industry Master ukuzokufundisa! Kodwa-ke, isihlungi se-Front-End se-435mhz band akulula ukwengeza. Ake siqale ukuhlaziywa
Leli isethi yokuhlunga kwe-chebyshev band-pass yokuhlunga ngokuhlangana okuphezulu kwe-capacitor kanye nemvamisa yesikhungo se-435mhz. Ngenxa yokusetshenziswa kwe-Chip etholakala kwezentengiso (enenani le-Q okufika ku-70), ukulahleka kokufaka kukhulu kakhulu, kufinyelela -11db, kanti elinye ijika liyinkomba (engaguqulwa ibe ngamagagasi amile). Ngakho-ke, ukuzwela kwalowo owemukelayo kuyathinteka kakhulu, ngoba ukuzwela kwalowo owemukelayo kuhlobene ngqo nesibalo somsindo wesigaba sokuqala sokukhuliswa okuphezulu, noma ubuchwepheshe buhle kakhulu, kepha ukulahlekelwa yi-plug kwehluphu ephezulu kungalawulwa yi-11DB. Ngakho-ke akuvamile ukubona eyodwa isetshenziswe kanjena. Bheka lesi sithombe futhi:

Gcina amanye amapharamitha, i-inductor ithathelwa indawo yikhoyili engcono eyize, yize ivolumu likhulu, kepha ukulahlekelwa kokufaka kuba cishe - 5, okusebenziseka kalula, kepha kusenzima kakhulu ukwenza. Ngoba: I-coupling cappitance phezulu ingu-0.2p kuphela, futhi amandla alesi sikhundla akulula ukuthenga, ngakho-ke ungadweba i-capacitor ku-PCB, okuletha ubunzima kwimpumelelo eyi-1. Ngisho ne-Inductor eyi-12nh ayilungile kakhulu ukuwumoya, futhi kufanele ibe yize futhi ihlanganiswe, futhi akukuhle ukukwazi uma kukhona okuhlangenwe nakho okunganele. Ukudonswa kwe-intanethi kusekukhulu, amapharamitha alawo ma-capacitors azwela kakhulu, futhi ushintsho oluncane luzothinta ukusebenza. Ngakho-ke kuthiwani uma ungaqhubeka ukhuphule inani le-Q ye-inductor, futhi kunendlela yokuqhubeka nokunciphisa amandla okuhlanganisa? Bese uncipha i-bandwidth kancane. Isimo sizoba ngale ndlela elandelayo:

Inani le-Inductance Q yalesi sibalo ngokuzumayo liba ngo-1600, futhi i-induclance iba likhulu, igrafu iba yinhle kakhulu, lokhu kungaqinisekiswa ukusetshenziswa kwamandla ngqo ngemuva kwesiqeshana sengxenye ye-IC, ngokuzumayo donsela ibanga phezulu. Ukusebenza okungcono, kepha ubukhulu bukhulu kakhulu isihlungi se-MicroSTRIP

Idilikhi yomoya ewusizo yalesi sihlungi esilula, abantu abambalwa futhi abambalwa abazokwakha ngempela eChina, futhi isoftware empeleni ihlanganiswe kahle. Okokuqala, isithombe esedlule singenisa isihlungi sangempela sokulukama samadivayisi eselula angama-435mhz. Eqinisweni, ukuhlunga okungcono kufanele kufakwe imishini eqondile, sizokwakha ikhwalithi ephezulu 2-cavity kanye nezihlungi ezi-4-cavity zalo mshini wokuhlola.





Isikhathi sePosi: Jul-17-2024