ece549Quiz2SampleKey

ece549Quiz2SampleKey - ECE549 RF Design for Wireless Sample...

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1 ECE549 RF Design for Wireless Sample Quiz 2 Key 1. [10] A network consists of a source with a Thevenin equivalent impedance of 50 Ω driving first a series reactance of 50 Ω , followed by an eighth-wavelength long transmission line with a characteristic impedance 40 Ω , and a reactive element of 25 Ω in shunt with a load having an impedance 25 100 L Z =− j . This problem must be solved graphically and no credit will be given if this is not done. (a) [2] Draw the network. (b) [5] On a Smith Chart plot the locus of the reflection coefficient first for the load, then with the element in shunt, and then looking into the transmission line and finally the series element. Use letters to identify each point on the Smith chart. Write down the reflection coefficient at each point. (c) [3] What is the impedance presented by the network to the source?

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3 2. [10] A transmission line has an attenuation of 0.2 dB/cm and a phase constant of 50 radians/m at 1 GHz.

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This note was uploaded on 09/24/2009 for the course ECE 549 taught by Professor As during the Fall '09 term at N.C. State.

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ece549Quiz2SampleKey - ECE549 RF Design for Wireless Sample...

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