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161_1_Midterm_1

# 161_1_Midterm_1 - EE161 Electromagnetic Waves Spring 2010...

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EE161 Electromagnetic Waves Spring, 2010 Midterm One Name: Student ID: Score:

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Problem #1 (33pts). A left-hand circularly polarized plane wave is propagating in air. The propagation direction is in x-y plane with an angle of 30 degree to the positive x- axis. The amplitude of each electric field component is 1. The frequency of the wave is 1GHz. (1) write down the phasor expression of both the electric field and the magnetic field (2) write down the time-domain expression of both the electric and magnetic field
Problem #2 (33pts). A 25 MHz plane wave propagates in air toward positive Z axis. If the wave normally incidents on the surface of a semiconductor material with dielectric constant 9 = r ε and (S/m) 100 = σ . Assume the wave is linearly polarized in the x- direction, determine (1) the reflection coefficient and the transmission coefficient (2) the phasor expression of both the electric field and magnetic field and inside the semiconductor medium

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161_1_Midterm_1 - EE161 Electromagnetic Waves Spring 2010...

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