Izici:
- Ibhendi Ebanzi
- Umsindo Ophansi
Ivamise ukusetshenziswa njengesandulela samafrikhwensi aphezulu noma esimaphakathi sesamukeli somsakazo esihlukene, kanye nesekhethi yokukhulisa imishini yokubona i-elekthronikhi ezwela kakhulu.Isikhulisi somsindo ophansi esihle sidinga ukukhulisa isignali ngenkathi sikhiqiza umsindo ophansi nokuhlanekezela ngangokunokwenzeka.
1. Zuza ukukhulisa: I-LNA ingakhulisa amasiginali okufakwayo abuthaka abe sezingeni elanele lesekhethi elandelayo noma ukucubungula uhlelo.Ekuxhumaneni okungenantambo, isignali eyamukelwe ngokuvamile iba buthaka kakhulu, futhi ngomphumela wokukhulisa i-LNA, isignali ingathuthukiswa ibe sezingeni elithembekile ukuze inikeze ukucubungula nokudilizwa okulandelayo.
2. Yehlisa umsindo wesistimu: I-LNA ilwela ukunciphisa ukwethulwa komsindo owengeziwe ngenkathi ikhulisa isignali.Umsindo ubalulekile ekusebenzeni kwezinhlelo zokuxhumana ezingenazintambo njengoba zingavala amasignali futhi zehlise isilinganiso sesignali-kumsindo wesistimu.Isikhulisi somsindo ophansi sinciphisa umsindo wesistimu ngokunciphisa inani lomsindo ngokusebenzisa idizayini yesekethe ethuthukisiwe nezinto zomsindo ophansi.
3. Ukuthuthukisa ububanzi obuguquguqukayo besistimu: Omunye umsebenzi we-LNA ukukhulisa ububanzi obuguquguqukayo besistimu.Ububanzi obunamandla busho ikhono lesistimu lokuphatha amasiginali aqinile nabuthaka ngesikhathi esisodwa.Ama-amplifiers omsindo ophansi angakwazi ukuphatha amasiginali abuthakathaka ngaphandle kokulayisha ngokweqile noma ukuhlanekezela ngenxa yezimpawu ezinamandla.Lokhu kuvumela isistimu ukuthi isebenze ngempumelelo ezindaweni ezinobubanzi obukhulu bomehluko wamandla esignali.
Izinkambu eziyinhloko ze-LNA ukuxhumana okungenantambo, okokusebenza kwezokwelapha, izinsimbi zokulinganisa, i-radar, ukuxhumana ngesathelayithi, njll.
Qualwaveihlinzeka ngezikhulisamsindo eziphansi ukusuka ku-DC kuye ku-110GHz, futhi isibalo somsindo singase sibe phansi sibe ngu-0.7 dB.Inzuzo encane ingu-10dB futhi okokufaka okuphezulu kwe-VSWR ngu-3.5:1.Sinikezela ngezinhlelo ezahlukahlukene zezikhulisamsindo eziphansi ukuze sihlangabezane nazo zonke izidingo zakho ku-RF, i-microwave, nezingxenye ze-millimeter-wave amplifier.