Question: A waveguide, with dimensions a = 1 cm and b = 0.7 cm, is to be used at 20 GHz. Determine the wave impedance for the dominant mode when
(a) the guide is empty, and
(b) the guide is filled with polyethylene (whose εr = 2.25). The response must be typed, single spaced, must be in times new roman font (size 12) and must follow the APA format.