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a1234b“”abc1GHz30MHz~1GHz18GHzEMC1GHz1~40~100GHz0.1GHzRCS123cab1Hz3×108mLF1Hz~300KHz3×108~103mMF300KHz~3MHz1000m~100mHFRF3MHz~30MHz100m~10mVHF30MHz~300MHz10m~1mUHF300MHz~3GHz1m~0.1mSHF3GHz~30GHz10cm~1cm30GHz~300GHz10mm~1mm300GHz~4500GHz1mm~0.07mmab1GHz300GHzL1~2GHz1.12~1.70GHz20cmS2~4GHz2.6~3.95GHz10cmC4~8GHz3.95~5.85GHz5cmX8~12GHz8.2~12.4GHz3cmKu12~18GHz12.4~18GHz2cmK18~27GHz18~26.5GHz1.25cmKa27~40GHz26.5~40GHz0.8cmU40~60GHz0.6cmV60~80GHz0.4cmW80~100GHz0.8mmλ=c3×108m/sfHz1/sλ0180°ABPRPOPRPOdBPR/POГ(dB)=10?log10PR/POPR/PO1010PRPOГPR/PO1ε=ε′+jε″µ=µ′+jµ″23ε′≈1ε″µ′≈1µ″ε′µ′1ε=ε′+jε″=1µ=µ′+jµ″=1ε″µ″ε″/ε′µ″/µ′ε′µ′8~9ε′µ′ε′µ′12