20105ee161_1_HW4

# 20105ee161_1_HW4 - when 2a = 0.25 cm and 2b = 0.75 cm. What...

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EE161 Fall 2010, Homework #4 Problems: #1 to #4 shown below and 8.40, 8.41 (textbook, 6 th Ed.) #1. Derive the capacitance per unit length and inductance per unit length for (a) a coaxial line and (b) a parallel plate waveguide (the medium filled inside is non-magnetic and lossless with dielectric constant r ). #2. For a parallel plate waveguide, the width is 10 mm and the height is 1 mm. Find (a) the characteristic impedance and phase velocity of this transmission line (assume TEM only) (b) if a material with dielectric constant r = 4 is filled in between the two plates, how do the impedance and phase velocity of the line change? (c) If the voltage across the two conductor plates is 1 volt, how much power can this line carry? #3. (a) Determine the characteristic impedance of an air-filled coaxial line

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Unformatted text preview: when 2a = 0.25 cm and 2b = 0.75 cm. What is the wavelength at 3 GHz? Neglect dielectric and ohmic losses. (b) Repeat your calculations when the line is Teflon ( r = 2.05) filled. (c) For Teflon filled case, calculate the inductance and capacitance of the transmission line per unit length. #4. A microstrip line for which w/h = 4 has a dielectric substrate with a relative permittivity of 10. What are the values for , V p , and Z o predicted by (a) the parallel-plate waveguide model and (b) the empirical formulas in the 6 th Ed. textbook (see the scanned material on the course website if youre still using the 5 th Ed. textbook)? Assume the frequency is 1.5 GHz....
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## This note was uploaded on 02/10/2011 for the course ELEC ENGR 161 taught by Professor Xu,shenheng during the Fall '10 term at UCLA.

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20105ee161_1_HW4 - when 2a = 0.25 cm and 2b = 0.75 cm. What...

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