Test 1 - NAME: Milk 1. yaaudalw ID: [06/80 606 TRANSMISSION...

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Unformatted text preview: NAME: Milk 1. yaaudalw ID: [06/80 606 TRANSMISSION LINES AND ELECTROMAGNETICS - ESE319 TEST 1: October 15, 2009 Time: 9:50 am to 11:10 am ANSWER ALL QUESTIONS (All Questions Carry Equal Marks) Closed Book Name: PROBLEM 1 : a) Show that an open circuit, loss-less transmission can be used to synthesize reactive components. b) Using a loss-less transmission line with a characteristic impedance of 60 Q, synthesize a 1 pH inductor for use at a frequency of 'l’ 0 1M “1,. c) At what frequency will the reactance of the TL in part (b) become capacitive? fl) ZSC’ :: Z, 145F a Show!- QTWr'fiL’ ZLi‘Q, 'Zo 4*sz a“ 0C, Name: PROBLEM 2: . . . z 3 0 Cons1der a power splmer Illustrated here. Two loads RL1 0 ‘9' RL1=300 Q and RL2=200 Q are fed, in phase, from a loss- less transmission line with 20:100 Q. If the Ru receives twice the power of Ru find the values of 201 and 202. RLZ 2 29041 / Name: PROBLEM 3: A lossless 150 Q transmission line has a load reflection coefficient of F = 0.6ejmo . Use the Smith chart to find the following: a) The load impedance; b) Voltage standing wave ratio; c) Input admittance for a TL with a length of 0.30).; d) Shortest transmission length for which the input impedance is purely reactive; e) Position of the first voltage minimum from the load. a» Z 2. L— : __——-— H“) p— r \ < . Z; 2‘, — 12° - (. % +JIH30'5—D) ZL : .i + J in Lf' , (alZVSWR: M “‘72, k5”) fl.k"For TL .30} Z”; I; fowl Ot'i 30x 150 - wort! “Fae ’Ofim a 3:33; i '30) : 6333i $fil33k AVKI I Z ‘L‘ l \ — —_r—‘ ( :sa gm , /»~- g,“ 2:) Name: . . The Complete Smith Chart Black Magic Design m m w m m ‘3 H 'I 'IS I] In 1.4 I} I.) L. It I] I IN I‘ 0] I) 1.‘ I) u I.'I1J1.I I H ol .3 I .l‘lllflfl“ I! I} IN IIJOJOJ ll” M u 0101110 0.1 01 0] 1 II II 11 Name: . . . . . . .. PROBLEM 4: sum.- Cou Tut-m Linn 10 —T—‘__—_"—_——_4- 'ig‘ The figure shows the variation of the voltage measured along a loss-less slotted transmission line with a characteristic impedance of 100 9. Use the figure to determine the load impedance. 20 '~ Irma Find ZL > 9 v; Q W */ Name: PROBLEM 5: An air-filled two conductor transmission line with 20 = 50 Q, L = 900 m is terminated with a resistive load ZL = 150 (2. At t = 0 the input of the TL is connected to a 12 V DC source with an internal impedance 25 = 25 (2. Plot the current waveform at the load for 0 < t <I8 us. 23:23:11 ./_ Off C, r E“ y L: ?oom { " 3X/fi%- {353/43 ...
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Test 1 - NAME: Milk 1. yaaudalw ID: [06/80 606 TRANSMISSION...

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