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**Unformatted text preview: **mode TM mn ? 1 Phys 3327 Fall 2010 HW 9 Due Wednesday 11/10/10 in lecture c) Find the transverse components of the electric and magnetic ±elds in the waveguide. d) What is the magnitude and direction of the Poynting vector for the mode TM mn , averaged over time and over the cross section of the wave guide? Ex. 9.3: Waveguide with circular cross section Heald & Marion ex. 7-13. Suggested problems for further study: • Loss A rectangular hollow-conductor waveguide of dimensions a × b has walls made of good, but not perfectly conducting metal. Estimate the loss per unit length for the funda-mental ( n = 1) mode in this waveguide. Your answer should contain the dependence on the skin depth δ of the wall conductor, the frequency ω of the EM wave, a and b (if applicable), but you need not specify the precise numerical prefactor. • Resonant Cavity : Heald & marion, ex. 7-14. 2...

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