tutorial12Solution - The University of Western Australia...

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1 The University of Western Australia School of Electrical, Electronic and Computer Engineering Solutions - Tutorial Sheet 12, 2006 Electromagnetic Theory ENGT 3303 Question 1 A medium has the following constitutive parameters: . Sm 10 5 , 9 , -1 9 0 0 × = = = σ ε µ Calculate the wavelength of a wave with a frequency of 1 GHz propagating through the medium. Should the medium be regarded as free space, lossy dielectric, lossless dielectric or good conductor? 0 10 10 854 . 8 9 10 2 10 5 8 12 9 9 = = π ωε The medium should be regarded as a lossless dielectric (for most applications) 0 α m rad c f r r µε ω β 20 2 = = m 1 . 0 2 = = λ Question 2 Sea water plays a vital role in submarine communications. Assuming that for sea water, kHz 100 , 1 , 80 , Sm 4 -1 = = = = f r r , calculate (a) phase velocity; (b) wavelength; (c) skin depth; (d) intrinsic impedance. 1 10 9 10 854 . 8 80 10 2 4 3 12 5 >> = = Therefore seawater at this frequency can be considered a ‘good conductor’ [] 1 1 7 5 4 . 0
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This homework help was uploaded on 04/17/2008 for the course ELEC 3305 taught by Professor - during the Spring '07 term at University of West Alabama-Livingston.

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tutorial12Solution - The University of Western Australia...

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