Isikhulisi somsindo ophansi (i-LNA), imvamisa engu-9K~1GHz, inzuzo engu-30dB, isibalo somsindo (NF) esingu-2dB

I-amplifier yomsindo ophansi iyisici esibalulekile ezinhlelweni ze-RF/microwave, esetshenziswa kakhulu ukukhulisa amasignali abuthakathaka ngenkathi inciphisa umsindo owengeziwe. Imisebenzi yayo eyinhloko kanye nezimo zokusetshenziswa yilezi ezilandelayo:

Imisebenzi Eyinhloko:

1. Ukukhulisa isignali
Thuthukisa ubukhulu bezimpawu ezibuthakathaka ezitholwa yizinzwa noma ama-antenna ukuqinisekisa ukucutshungulwa okuphumelelayo yizifunda ezilandelayo njengezixubi nama-ADC.
2. Ukunciphisa umsindo
Ngokwenza ngcono umklamo nokusebenzisa izinto ezinomsindo ophansi, isibalo somsindo esizifakela sona (NF) silawulwa ngaphakathi kwebanga elingu-0.5-3dB (i-amplifier efanele NF = 0dB).

Izimo Zokusebenza:

1. Uhlelo lwe-radar
Ku-radar yezempi (njenge-radar yokulawula umlilo emoyeni) kanye ne-radar yabantu abavamile (njenge-radar yamagagasi e-millimeter yezimoto), i-LNA isetshenziselwa ukukhulisa isignali ye-echo ebuthakathaka (isilinganiso sesignali-kuya-kumsindo i-SNR < 0dB) eboniswa yi-target. Uma idlula esixhumanisini sokukhulisa ne-NF < 2dB, i-radar ingabona ama-target nge-RCS ekude noma ephansi (isigaba se-radar esiwela).
2. Uhlelo lokuxhumana olungenantambo
I-amplifier yomsindo ophansi iyisici esiyinhloko seziteshi zesisekelo ze-5G/6G, ukuxhumana kwesathelayithi, kanye nezixhumanisi zokwamukela iziteshi zeselula. Inesibopho sokukhulisa umsindo ophansi (NF < 1.5dB) wezibonakaliso ze-RF ezibuthakathaka (eziphansi njenge--120dBm) ezithathwe yi-antenna ngaphambi kokususwa kwesignali, okuthuthukisa kakhulu ukuzwela kokwamukela kwesistimu. Isibonelo, kubhendi yemvamisa yamagagasi e-millimeter (24 - 100GHz), i-LNA ingakhokhela ukulahlekelwa kwendlela okufika ku-20dB, iqinisekise ukuzinza kokudluliswa kwedatha ngesivinini esikhulu.
3. Ithuluzi lokuhlola elinokunemba okuphezulu
Kumadivayisi afana nabahlaziyi be-spectrum kanye nabahlaziyi benethiwekhi ye-vector (i-VNA), i-LNA inquma ngqo ukusebenza komsindo wethuluzi kanye nobubanzi obuguqukayo. I-LNA ingathuthukisa ukuzwela kwethuluzi ngokukhulisa isignali elinganisiwe yezinga le-nV kububanzi obusebenzayo be-quantization be-ADC (njenge-1Vpp). Okwamanje, i-ultra-low noise coefficient (NF <3dB) inganciphisa ngempumelelo ukungaqiniseki kokulinganisa futhi inciphise amaphutha okulinganisa.
4. Nweba izindawo zokufaka isicelo
I-radio astronomy: I-telescope ye-FAST ithembele ku-LNA epholile ye-helium (NF ≈ 0.1dB) ukuze ibambe imigqa ye-spectral engu-21cm endaweni yonke.
Ukubala kwe-Quantum: Ukukhulisa amasignali e-μV level (4 - 8GHz) ama-qubit e-superconducting kudinga ukusebenza komsindo oseduze nomkhawulo we-quantum.
Ukuthwebula izithombe zezokwelapha: Imishini ye-MRI ithuthukisa amasignali e-nuclear magnetic resonance esezingeni le-μV nge-LNA engeyona i-magnetic, ngokuthuthukiswa kwesilinganiso sesignali-kuya-kumsindo okungaphezu kwe-10dB.

I-Qualwave Inc. inikeza ama-amplifier anomsindo ophansi asukela ku-9kHz kuya ku-260GHz, kanye nomsindo ophansi ofika ku-0.8dB.
Imodeli ye-QLA-9K-1000-30-20, eyenzelwe ngokukhethekile ucwaningo lwesayensi kanye nezinhlelo zokusebenza zokuxhumana, ifinyelela ibhalansi yokusebenza enhle kakhulu yokukhuphuka kwe-30dB kanye nesibalo somsindo we-2dB kubhendi yemvamisa ye-9kHz ~ 1GHz.