(f) A long coaxial cable with a characteristic impedance of 75 Ω is connected to a second long ca...
1. A coaxial cable of characteristic impedance Zo 75 Q is terminated impedance of Z 25+ j45 0. Using the Smith Chart, find the input impedance of the line for the following frequencies and cable lengths (d), assuming the propagation veloci is 77% of the speed of light: by a load a) f 1 GHz and d50 cm b) f 5 GHz and d 25 cm
Question 3. (25 points) If a coaxial cable has characteristic impedance orzo-50 Ω, it is used to transfer microwave power at frequency of 10 GHz, and is short-circuited at the end, find the positions over the cable at which the input impedance of the transmission line is 0 (short-circuit) and oo (open-circuit). What is the input impedance at a distance of 3/8 and comment if it is inductive or capacitive?
A lossless transmission line with 50 Ω characteristic impedance has a 50 V step function placed on it, generated from a source impedance of 10 Ω. Assume the velocity of the signal on the line is 106 m/s, the line is 100 m long, and is terminated in a load impedance of 100 Ω. (a) What is the source voltage? (4 marks) (b) How long does the step function take to reach the termination load impedance? (2 marks) (c) What...
A coaxial cable 2 x 10% m/s) having a characteristic impedance of 100 Ω is driven at a frequency of 4 MHz and is 5 m in length. The line is ter- minated in a load of ŽL-: (150-j50) Ω and the source is Vs 10/0 V with Zs - 25 2. Determine the input and output voltages to the line using (a) the transmission-line model and (b) the approximate, lumped-pi model. [Exact: V(0) 7.954/-6578 , V(y) 10.25/-33.6 ; approxi-...
12. A longitudinal standing wave can be created in a long, thin aluminum rod by stroking the rod with very dry fingers. This is often done as a physics demonstration, creating a high-pitched, very annoying whine. From a wave perspective, the standing wave is equivalent to a sound standing wave in an open-open tube. In particular, both ends of the rod are anti-nodes. What is the fundamental frequency of a 2.50 m -long aluminum rod? The speed of sound in...