传输线理论与阻抗匹配éuz×P§¤°tMicrowave & Communication Lab.1¤jq éuz× Lléu (Loss-less Transmission Line) §Cléu (Low-loss Transmission Line) ×-tüéuq éSx° Pbu (Coaxial Line) ±au (Strip Line) L±au (Microstrip Line)q ¤§G¤ó§¤°t u}¨§¤°t (Single-Stub Tuning Impedance Matching )Microwave & Communication Lab.2éuz×q ¤@qL--uéu¤§°`¤óqi(z,t)+ v(z,t)i(z,t)+ v(z,t) zzi ( z + z, t )+ Cz v( z + z, t ) R zL zGzz¨¤¤ R=ìפ§êpqA /mC L=ìפ§êpqPAH/mC G =ìפ§¨pqAS/mC C=ìפ§¨pqeAF/mCMicrowave & Communication Lab.3éuz×q §J§M¤qw (Kirchhoff’s Voltage Law, KVL) dI V Lz IRz (V + V ) = 0 dt V V = jωLIz RIz = ( R + j ωL ) I zq §J§M¤qyw (Kirchhoff’s Current Law, KCL)d (V + V ) I Cz Gz (V + V ) ( I + I ) = 0 dt I = jC zω (V + V ) G(V + V )z I = (G + jωC )(V + V ) z……