Field and Wave Electromagnetics 2nd Edition by David Cheng

Exercise 5

An air-filled rectangular cavity with brass walls- 0 , 0 , = 1.57 × 10 7 (S/m)-has the following dimensions: a = 4 (cm), b = 3 (cm), and d = 5 (cm).
a) Determine the dominant mode and its resonant frequency for this cavity.
b) Find the Q and the time-average stored electric and magnetic energies at the resonant frequency, assuming H 0 to be 0.1 (A/m).