Qhov kev ua tau zoo ntawm amicrowave kav hlau txais xovnyob ntawm nws cov zaus band, nce, thiab daim ntawv thov scenario. Hauv qab no yog ib qho kev sib cais rau cov hom kav hlau txais xov:
1. Zaus Band & Range Correlation
- E-band Kav hlau txais xov (60-90 GHz):
Kev sib txuas luv luv, muaj peev xwm sib txuas (1-3 km) rau 5G backhaul thiab tub rog comms. Atmospheric attenuation nce mus txog 10 dB / km vim kev nqus oxygen. - Ka-band Kav hlau txais xov (26.5-40 GHz):
Satellite comms ua tiav 10-50 km (hauv av-rau-LEO) nrog 40+ dBi nce. Los nag ploj tuaj yeem txo qhov ntau ntawm 30%. - 2.60-3.95 GHzHorn Kav hlau txais xov:
Kev pab cuam nruab nrab (5–20 km) rau radar thiab IoT, ntsuas qhov nkag mus thiab cov ntaub ntawv tus nqi.
2. Kav hlau txais xov hom & kev ua haujlwm
| Kav hlau txais xov | Yam Tau Txais | Max Ntau | Siv Case |
|---|---|---|---|
| Biconical Kav hlau txais xov | 2-6 dBi | <1 km (EMC xeem) | Kev kuaj mob luv luv |
| Standard Gain Horn | 12-20 dBi | 3-10 km | Calibration / ntsuas |
| Microstrip Array | 15-25 dBi | 5-50 km | 5G hauv paus chaw nres tsheb / Satcom |
3. Ntau yam kev xam cov hauv paus
Friis kis kab zauv kwv yees ntau yam (*d*):
d = (λ/4π) × √(P_t × G_t × G_r / P_r)
Qhov twg:
P_t = Xa lub zog (piv txwv li, 10W radar)
G_t, G_r = Tx/Rx antenna gains (eg, 20 dBi horn)
P_r = Txais rhiab heev (piv txwv li, -90 dBm)
Tswv yim tswv yim: Rau Ka-band satellite txuas, ua ke lub siab-tau txais horn (30+ dBi) nrog suab nrov nrov amplifiers (NF <1 dB).
4. Kev txwv ib puag ncig
Los nag Attenuation: Ka-band signals poob 3-10 dB / km hauv nag hnyav.
Beam Spread: A 25 dBi microstrip array ntawm 30 GHz muaj 2.3 ° beamwidth - haum rau qhov tseeb taw tes-to-point txuas.
Kev xaus: Microwave kav hlau txais xov sib txawv ntawm <1 km (biconical EMC tests) mus txog 50+ km (Ka-band satcom). Ua kom zoo dua los ntawm kev xaiv E-/Ka-band antennas rau kev xa tawm lossis 2-4 GHz horns rau kev ntseeg tau.
Yog xav paub ntxiv txog antennas, thov mus saib:
Post lub sij hawm: Aug-08-2025
