1. Find the velocity with which the group of two frequencies 2400 MHz and 2500 MHz travels in a parallel-plate waveguide of dimension a = 2.5 cm and having a perfect dielectric of
2. For a narrow-band amplitude modulated signal having the carrier frequency 5000 MHz propagating in an air dielectric parallel-plate waveguide of dimension a = 5cm, find the velocity with which the modulation envelope travels.