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A 300 ohm feedline is to beconnected to a 5-m long, 200 ohm line terminated in a 150 ohmantenna resistor. Both lines are lossless and use air as aninsulating material, and the operating frequency is 30MHz.
Determine
(a) The inputimpedance of the 5-m long line.
(b) The voltage standingwave ratio for the feedline.
(c) A quarter wavetransformer is now used to replace the 200 ohm line. Find thecharacteristic impedance of a quarter wave transformer tomatch the feedline and the resistor.
(d) Calculate the lengthof the quarter wave transformer for the matched case.
(e) Find the inputimpedance seen at the transformer input when operating frequency ischanged to 40 MHz.
(f) Find thereflection coefficient when the frequency is 40 MHz.
(g) Find the VSWR on thefeedline for the reflection coefficient in part (f).
At a substation the primary of a step-down transformer (turns ratio = 1:26) receives the voltage from the high-voltage transmission line. Because of your usage, a current of 48.0 mA exists in the primary of this transformer.
A starship of mass (2.0?106 kg) uses its tractor beam to pull a shuttlecraft (2.0?104 kg) aboard from a distance of 10 km away. The tractor beam exerts a constant force of 4.0104 N on the shuttlecraft. Both spacecraft are initially at rest.
Design a three-bit binary counter that iterates over the following states when X = 0 and repeats 000 010 110 011 101 001 100 111 When X = 1, the counter should go through the states in the reverse order Use one JK, one T, and one D flip-flop, in any ..
The other branch is an inductor with reactance of 8 ohms. If an external load is to be placed across the current phasor source, find the Thevenin source equivalent of the circuit described. Draw the original circuit and the Thevenin equivalent cir..
The data rate of a continuous-phase FSK modulated signal is 100 kbps. What is the minimum frequency separation that can maintain orthogonality between the two tones (sinusoidal carriers)
Flip-flops must be in what mode (Set, Reset, Hold, or Toggle) in order to divide a clock's frequency when building a counter What is the advantage of a synchronous counter as compared to a ripple counter
Derive the dynamic model and average value circuit of a buck converter assuming the ESRs of the inductor and capacitor are not equal to zero.
A 10 kHz signal modulates a 500 MHz carrier, with a modulation index of 2. What are the maximum and minimum values for the instantaneous frequency of the modulated signal
Determine the system impulse response in time domain and draw its root locus and comment on system stability.
An analog system requires an antenna signal power of 100pW to meet the required detected signal-to-noise ratio. Other system parameters are given as follows: Gt(dB) =4dB determine the minimum value of the transmitter power required.
We have v1(t)=10cos(wt+30degrees). The current i1(t) has an rms value of 5A and leads v1(t) by 20s. (The current and the voltage have the same frequency) Draw a phasor diagram showing the phasors.
An increase in the reverse bias base -to-collector voltage reduces the bas width (base modulation effect). At what voltage would the base width be reduced to zero ("punch through" breakdown) if the zero-bias base width is 0.937 μm
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