Lect36TLDiscont - Cunningham ECE329 Lecture 36 TL...

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Unformatted text preview: Cunningham ECE329 Lecture 36 TL Discontinuities Lecture 36 Cunningham ECE329 Lecture 36 Z 01 Z 02 incident transmitted reflected What happens at the boundary between two TL’s? Assume that (+) wave hits the junction from the left V + , I + V- , I- V ++ , I ++ Cunningham ECE329 Lecture 36 Z 01 Z 02 V + , I + Z 01 Z 02 V + +V- , I + +I- V ++ , I ++ Before + wave hits boundary As + wave hits boundary V + + V " = V ++ I + + I " = I ++ incident transmitted reflected incident Cunningham ECE329 Lecture 36 Z 01 Z 02 V + +V- , I + +I- V ++ , I ++ After + wave hits boundary V + + V " = V ++ I + + I " = I ++ I + = V + Z 01 I " = " V " Z 01 I ++ = V ++ Z 02 Cunningham ECE329 Lecture 36 Power P incident = V + I + P reflected = V " I " P transmitted = V ++ I ++ Some of the incident power is reflected back and the rest is transmitted through to the second line Cunningham ECE329 Lecture 36 Voltage Reflection Coeff " = V # V + = Z 02 # Z 01 Z 02 + Z 01 Voltage Transmission Coeff " v = V ++ V + = V + + V # V + = 1 + V # V + " v = 1 + # Fraction of incident voltage that gets reflected back Fraction of incident voltage that gets transmitted through Cunningham ECE329...
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This note was uploaded on 01/17/2011 for the course ECE 305 taught by Professor Staff during the Summer '08 term at Michigan State University.

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Lect36TLDiscont - Cunningham ECE329 Lecture 36 TL...

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