[題目] 電磁波
[領域] 電磁干擾 (題目相關領域)
[來源] 電磁相容課本 (課本習題、考古題、參考書...)
(1).
Determine the following electric field intensity levels in dBmV=m:
1. 100μV/m [40 dBμV/m]
2. 1 mV/m [60 dBμV/m]
3. 200 V/m [166 dBμV/m]
(2).
A 50Ω source is connected to a 50Ω receiver using 30 ft of RG58U
coaxial cable. If the source output is 100 MHz and –30 dBm, determine
the voltage at the receiver in mV and dBμV. [6.05mV, 75.6 dBμV]
(3).
A 50Ω receiver is attached to an antenna via 200 m of RG58U coaxial
cable. The receiver indicates a level of -20 dBm at 200 MHz. Determine
the voltage at the base of the antenna in dBμV and in V if the cable loss
at 200 MHz is 8 dB/100 ft. [139.49 dBμV, 9.43V]
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※ 編輯: ytc01286 來自: 219.84.124.163 (10/28 21:45)
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