Design a rectangular air-filled waveguide to be operated at 6 GHz, then, redesign it to be
operated at 12 GHz. The operating frequency must lie in the middle of the operating band.
Calculate the guide dimensions, the attenuation constant in dB/m, and the maximum
transmitted power assuming the maximum electric field is one-half of the dielectric strength of
air. Assume copper walls with conductivity σ = 5.8×10 7