Low phokoso amplifier (LNA), pafupipafupi 9K ~ 1GHz, kupeza 30dB, phokoso chithunzi (NF) 2dB

Low phokoso amplifier ndi gawo lofunikira pamakina a RF/microwave, omwe amagwiritsidwa ntchito kwambiri kukulitsa ma siginecha ofooka ndikuchepetsa phokoso lowonjezera. Ntchito zake zazikulu ndi zochitika zogwiritsira ntchito ndi izi:

Zofunika Kwambiri:

1. Kukulitsa chizindikiro
Limbikitsani matalikidwe azizindikiro zofooka zolandilidwa ndi tinyanga kapena masensa kuti muwonetsetse kukonzedwa bwino ndi mabwalo otsatira monga osakaniza ndi ma ADC.
2. Kuletsa phokoso
Mwa kukhathamiritsa kapangidwe kake ndi kugwiritsa ntchito zida zotsika phokoso, chithunzi cha phokoso cha self-introduce (NF) chimayendetsedwa mkati mwa 0.5-3dB (amplifier yabwino NF = 0dB).

Kagwiritsidwe Ntchito:

1. Dongosolo la radar
Mu radar yankhondo (monga radar yowongoleredwa ndi ndege) ndi radar wamba (monga automotive millimeter wave radar), LNA imagwiritsidwa ntchito kukulitsa siginecha yofooka ya echo (chiwerengero cha siginecha-ku phokoso SNR <0dB) chowonetsedwa ndi chandamale. Podutsa ulalo wokulitsa ndi NF <2dB, radar imatha kuzindikira zolinga ndi RCS yotalikirapo kapena yotsika (gawo lodutsa radar).
2. Njira yolumikizirana opanda zingwe
Low noise amplifier ndiye chigawo chachikulu cha 5G/6G base station, satellite communication, ndi mafoni olandila maulalo. Imayang'anira kukulitsa phokoso lotsika (NF <1.5dB) ya ma siginecha ofooka a RF (otsika mpaka -120dBm) ogwidwa ndi mlongoti musanayambe kutsitsa ma siginecha, kuwongolera kwambiri kukhudzidwa kwa dongosolo. Mwachitsanzo, mu millimeter wave frequency band (24 - 100GHz), LNA ikhoza kulipira mpaka 20dB ya kutayika kwa njira, kuonetsetsa kukhazikika kwa kufalikira kwa data mwachangu.
3. Chida choyesera cholondola kwambiri
Pazida monga ma spectrum analyzers ndi vector network analyzers (VNA), LNA imatsimikizira mwachindunji momwe chidacho chimagwirira ntchito komanso kuchuluka kwamphamvu. LNA imatha kupititsa patsogolo kukhudzidwa kwa zida pokulitsa siginecha yoyezera mulingo wa nV mpaka pamlingo woyenera wa ADC (monga 1Vpp). Pakadali pano, phokoso laling'ono kwambiri (NF <3dB) limatha kuchepetsa kusatsimikizika kwa muyeso ndikuchepetsa zolakwika zoyezera.
4. Wonjezerani madera ogwiritsira ntchito
Wailesi zakuthambo: The FAST telescope imadalira LNA yamadzimadzi ya helium (NF ≈ 0.1dB) kuti igwire mizere yowoneka bwino ya 21cm m'chilengedwe.
Makompyuta a Quantum: Kukulitsa ma siginecha a μV (4 - 8GHz) a ma superconducting qubits amafunikira pafupi ndi malire a phokoso.
Kujambula kwachipatala: Zipangizo za MRI zimakulitsa ma siginecha a μV a nyukiliya ya nyukiliya kudzera mu LNA yopanda maginito, ndikuwongolera kwa chiwongolero chopitilira 10dB.

Qualwave Inc. imapereka zokulitsa phokoso lotsika kuyambira 9kHz mpaka 260GHz, zokhala ndi phokoso lotsika mpaka 0.8dB.
Mtundu wa QLA-9K-1000-30-20, womwe umapangidwa mwapadera kuti ufufuze kafukufuku wasayansi ndi kulumikizana, umakwaniritsa bwino magwiridwe antchito a 30dB phindu ndi 2dB phokoso la 9kHz ~ 1GHz frequency band.