Chokweza phokoso lotsika (LNA), pafupipafupi 9K ~ 1GHz, kupeza 30dB, chiwerengero cha phokoso (NF) 2dB

Chokulitsa phokoso lotsika ndi gawo lofunikira kwambiri mu machitidwe a RF/microwave, chomwe chimagwiritsidwa ntchito makamaka kukulitsa zizindikiro zofooka pamene chikuchepetsa phokoso lowonjezera. Ntchito zake zazikulu ndi zochitika zomwe zimagwiritsidwa ntchito ndi izi:

Ntchito Zazikulu:

1. Kukulitsa chizindikiro
Wonjezerani kukula kwa zizindikiro zofooka zomwe zimalandiridwa ndi ma antenna kapena masensa kuti zitsimikizire kuti ma circuits otsatira monga osakaniza ndi ma ADC akugwiritsidwa ntchito bwino.
2. Kuletsa phokoso
Mwa kukonza kapangidwe kake ndikugwiritsa ntchito zipangizo zopanda phokoso lalikulu, chiŵerengero cha phokoso chomwe chimadziyambitsa chokha (NF) chimayendetsedwa mkati mwa 0.5-3dB (ideal amplifier NF = 0dB).

Zochitika Zogwiritsira Ntchito:

1. Dongosolo la radar
Mu radar yankhondo (monga radar yowongolera moto yochokera mumlengalenga) ndi radar ya anthu wamba (monga radar yamagalimoto ya millimeter wave), LNA imagwiritsidwa ntchito kukulitsa chizindikiro chofooka cha echo (signal-to-noise ratio SNR < 0dB) chomwe chimawonetsedwa ndi chandamale. Podutsa mu ulalo wokulitsa ndi NF < 2dB, radar imatha kuzindikira zolinga ndi RCS yakutali kapena yotsika (radar cross section).
2. Njira yolumikizirana yopanda zingwe
Chokulitsa phokoso lotsika ndiye gawo lalikulu la malo oyambira a 5G/6G, kulumikizana kwa satellite, ndi maulalo olandirira ma terminal amafoni. Chimayang'anira kukulitsa phokoso lotsika (NF < 1.5dB) la zizindikiro zofooka za RF (zotsika ngati -120dBm) zomwe zimagwidwa ndi antenna isanatulutse chizindikiro, zomwe zimapangitsa kuti dongosololi lizilandira bwino. Mwachitsanzo, mu millimeter wave frequency band (24 - 100GHz), LNA ikhoza kulipira kutayika kwa njira mpaka 20dB, kuonetsetsa kuti kutumiza deta mwachangu kumakhala kokhazikika.
3. Chida choyesera cholondola kwambiri
Mu zipangizo monga ma spectrum analyzers ndi ma vector network analyzers (VNA), LNA imazindikira mwachindunji momwe phokoso limagwirira ntchito komanso kuchuluka kwa mphamvu ya chipangizocho. LNA imatha kusintha mphamvu ya chipangizocho mwa kukulitsa chizindikiro choyezedwa cha nV ku ADC (monga 1Vpp). Pakadali pano, ultra-low noise coefficient (NF <3dB) imatha kuchepetsa kusatsimikizika kwa muyeso ndikuchepetsa zolakwika zoyezera.
4. Kukulitsa madera ogwiritsira ntchito
Kufufuza zakuthambo kwa wailesi: Telesikopu ya FAST imagwiritsa ntchito LNA yoziziritsidwa ndi helium (NF ≈ 0.1dB) kuti ijambule mizere ya spectral ya 21cm m'chilengedwe chonse.
Kuwerengera kwa Quantum: Kukulitsa zizindikiro za μV level (4 - 8GHz) za superconducting qubits kumafuna phokoso lochepa kwambiri.
Kujambula zithunzi zachipatala: Zipangizo za MRI zimawonjezera ma signal a nuclear magnetic resonance a μV kudzera mu LNA yopanda maginito, ndi chiŵerengero cha chizindikiro-ku-phokoso chokwera kuposa 10dB.

Qualwave Inc. imapereka ma amplifier a phokoso lochepa kuyambira 9kHz mpaka 260GHz, ndi phokoso lochepa mpaka 0.8dB.
Chitsanzo cha QLA-9K-1000-30-20, chomwe chapangidwa mwapadera kuti chigwiritsidwe ntchito pa kafukufuku wa sayansi ndi kulumikizana, chimakwaniritsa bwino magwiridwe antchito a 30dB gain ndi 2dB noise figure mu 9kHz ~ 1GHz frequency band.