RF 的19個精華問題問答

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9 H& Z4 Z: f( A+ H% Y" ]) S8 GRF 的19個精華問題問答
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/ M' _& B( z: x9 O$ D$ V1. What is the impedance of free space?
2. What happens to the noise figure of a receiver when a 10 dB attenuator is added at the input?
" T0 I) v5 |: ?% x( U3 t  J# W& |3 Z3. An RF system has a linear throughput gain of +10 dB and an output 3rd-order intercept point (OIP3) of +30 dBm. What is the input 3rd-order intercept point (IIP3)?