Z can be interpteted as a cascade of series capacitances and shunt inductances terminated with a unit resistance c品 20-31c In -()(" j(pkn) L -(月(") Zn=j(pha)'/phn. Equivalent circuit of TM spherical wave. RADIUS OF SPHERE c:VELOCITY OF LIGHT c. Equivalent circuit of electric dipole for n=1can be interpteted as a cascade of series capacitances and shunt inductances terminated with a unit resistance Z n for n=1