Reflection of a coaxial line radiating into a parallel plate is solved
analytically, The Hankel transform and the mode-matching technique ar
e used to represent the reflection coefficient in rapidly converging s
eries, The numerical computations are performed to illustrate the refl
ection behavior in terms of coaxial geometries and frequency, The pres
ented series solution is an analytic, closed-form that is simple yet e
fficient for numerical computation.