To conclude -2 ●●● ●●●● ●●●●● ●●●0 S 4.4 Basic Practical Antennas ●●●●0 ●●●0 ●●●● ● 馈电网路。 辐射单元 1(z) 射 Rpd Rloss 景 o-M R erad ad ad Z.> Rrad +Ros →+2a R=20a Rs 040 (2) R2ó (2) 6πa x台-a (4=4π*10-7H/m, Ccopper=5.8*10S/m) 11To conclude - 2 §4.4 Basic Practical Antennas 11 2 20 ( ) rad L R           0 7 0 7 copper ( ) 2 ( 4 *10 H/m, =5.8*10 S/m) R s          ( ) 6 s loss R L R a   60 ln 1 ( ) L X L a                 rad rad rad in rad loss P R e P R R   