1. Design a parallel-plate transmission line according to the following requirements: (a) characteristic impedance 50 Ohms; (b) capacitance per unit length 100 pF/m. You have at your disposal three dielectric materials, namely, teflon, polyethylene, and polystyrene, all in the form of 1.9-mm thick strips. Assume the insulating materials are perfect dielectrics and the metal plates are perfect conductors. The relative electrical permittivity of these materials is as follows: teflon 2.1 , polyethylene 2.25 , polystyrene 2.6.

polyethylene, w = 9.5 mm