The voltage is proportional to Eo and the current is proportional to H on the surface of the sphere,so Z can be write as a continued fraction: the normalized impedance Z,is: r 1 元网 jp2m-1,1 jp 2h-3 ，=h1-+ h, je ph]=[ph +h ]ph-nh 乙，= 3 ph 10  ' ( ) ( ) n n n E h Z j H h             ' 1 ' ' 1 1 1 [ ] [ ] n n n n n n n n n n n n n h h h h h h h nh Z j h h nh                         The voltage is proportional to and the current is proportional to on the surface of the sphere , so the normalized impedance is: n E H Z   can be write as a continued fraction: Z n