傳輸線理論與阻抗匹配éuz×P§¤°t
Microwave & Communication Lab.
1
¤j
q éuz×
Lléu (Loss-less Transmission Line) §Cléu (Low-loss Transmission Line) ×-tüéu
q 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¤§°`¤óq
i(z,t)
+ v(z,t)
i(z,t)
+ v(z,t)
z
z
i ( z + z, t )
+ Cz v( z + z, t )
R z
L z
Gz
z
¨¤¤ R=ìפ§êpqA /mC L=ìפ§êpqPAH/mC G =ìפ§¨pqAS/mC C=ìפ§¨pqeAF/mC
Microwave & 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 z
q §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
……
