Question: | (a) :Discuss briefly wave guides. (b) A circular waveguide has an internal diameter of Sem, calculate the cut-off frequencies. for the Tollowing modes:

| (a) :Discuss briefly wave guides. (b) A circular waveguide has an

| (a) :Discuss briefly wave guides. (b) A circular waveguide has an internal diameter of Sem, calculate the cut-off frequencies. for the Tollowing modes: TMo and TE92. (c) A 6 GHz signal is to be propagated in the dominant mode in a rectangular waveguide. If its group velocity is to be 90% of the free spice velocity of light, what must be the breadth of the waveguide? What impedance wil! it offer to this signal, if it is correctly matched?

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