題組內容

4.For a coaxial transmission line shown in Fig. 2, the capacitance per unit length is61d52ba8d6702.jpgand the inductance per unit length is61d52bcb8ab30.jpg. At high frequencies, the intemal inductance drops off (that is, approaching 0, and you should know which term is the internal inductance).

(4%) (c) Find the external inductance L for such a transmission system in air using a quasi-TEM property61d52cff975f5.jpg 61d52d282ef3f.jpg