Isikhulisi somsindo esiphansi (LNA), imvamisa 9K~1GHz, zuza u-30dB, isibalo somsindo (NF) 2dB

Isikhulisi somsindo ophansi siyingxenye ebalulekile ezinhlelweni ze-RF/microwave, ikakhulukazi ezisetshenziselwa ukukhulisa amasiginali abuthakathaka kuyilapho kunciphisa umsindo owengeziwe. Imisebenzi yayo eyinhloko kanye nezimo zohlelo lokusebenza zimi kanje:

Imisebenzi esemqoka:

1. Ukukhulisa isignali
Thuthukisa i-amplitude yezimpawu ezibuthakathaka ezitholwe izimpondo noma izinzwa ukuze uqinisekise ukucutshungulwa okusebenzayo ngamasekhethi alandelayo njengezixube nama-ADC.
2. Ukunciphisa umsindo
Ngokulungiselela ukuklama nokusebenzisa izinto ezinomsindo ophansi, isibalo somsindo esizingenisayo (NF) silawulwa ngaphakathi kwebanga elingu-0.5-3dB (i-amplifier ekahle NF = 0dB).

Izimo zohlelo lokusebenza:

1. Uhlelo lwe-radar
Ku-radar yezempi (njenge-radar yokulawula umlilo emoyeni) kanye ne-radar yabantu (njenge-automotive millimeter wave radar), i-LNA isetshenziselwa ukukhulisa isignali ye-echo ebuthaka (isilinganiso sesignali-kuya-nomsindo SNR <0dB) esiboniswa impokophelo. Uma idlula isixhumanisi sokukhulisa nge-NF <2dB, i-radar ingakwazi ukubona okuqondiwe nge-RCS ekude noma ephansi (isigaba esiphambene se-radar).
2. Uhlelo lokuxhumana okungenantambo
Isikhulisi somsindo ophansi siyingxenye eyinhloko yeziteshi eziyisisekelo ze-5G/6G, ezokuxhumana ngesathelayithi, nezixhumanisi zokuthola itheminali yeselula. Ibophezelekile ekukhuliseni umsindo ophansi (NF <1.5dB) wamasiginali e-RF abuthaka (aphansi njenge -120dBm) athwetshulwa uthi ngaphambi kokwehliswa kwesignali, okuthuthukisa kakhulu ukuzwela kokwamukela kwesistimu. Isibonelo, kubhendi ye-millimeter wave frequency (24 - 100GHz), i-LNA inganxephezela kufika ku-20dB wokulahleka kwendlela, iqinisekise ukuzinza kokudluliswa kwedatha ngesivinini esikhulu.
3. Ithuluzi lokuhlola ukunemba okuphezulu
Kumadivayisi afana nezihlaziyi ze-spectrum kanye ne-vector network analyzers (VNA), i-LNA inquma ngokuqondile ukusebenza komsindo wensimbi nobubanzi obuguqukayo. I-LNA ingathuthukisa ukuzwela kwensimbi ngokukhulisa isignali elinganiselwe yezinga le-nV kububanzi obusebenzayo bokulinganisa be-ADC (njenge-1Vpp). Ngaleso sikhathi, i-ultra-low noise coefficient (NF <3dB) inganciphisa ngempumelelo ukungaqiniseki kokulinganisa futhi inciphise amaphutha okulinganisa.
4. Nweba izindawo zokufaka izicelo
I-astronomy yomsakazo: Isibonakude se-FAST sithembele ku-LNA ewuketshezi ye-helium epholile (NF ≈ 0.1dB) ukuze ithwebule imigqa ye-spectral engu-21cm endaweni yonke.
I-Quantum computing: Ukukhulisa amasiginali weleveli ye-μV (4 - 8GHz) yama-qubits e-superconducting kudinga ukusebenza komsindo womkhawulo we-quantum.
Isithombe sezokwelapha: Imishini ye-MRI ithuthukisa izinga le-μV amasiginali we-nuclear magnetic resonance ngokusebenzisa i-LNA engeyona enozibuthe, ngokuthuthukiswa kwesilinganiso sesignali-kuya-nomsindo esingaphezu kuka-10dB.

I-Qualwave Inc. ihlinzeka ngezikhulisi zomsindo ophansi ukusuka ku-9kHz ukuya ku-260GHz, ezinomsindo ophansi njengo-0.8dB.
Imodeli ye-QLA-9K-1000-30-20, eklanyelwe ngokukhethekile ucwaningo lwesayensi nezinhlelo zokusebenza zokuxhumana, ifinyelela ibhalansi enhle kakhulu yokusebenza kwenzuzo engu-30dB kanye nenani lomsindo elingu-2dB kubhendi yefrikhwensi engu-9kHz~1GHz.