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What is the significance of radiation resistance? If the resistance of an antenna can be neglected, what must be the characteristic impedance of the transmission line feeding the antenna so that the antenna radiates maximum power?
If possible, compare your results to those obtained from a microwave CAD tool.
If the design frequency is 4 GHz, sketch the layout of a microstrip circuit, including dimensions, to implement this matching transformer. Assume the substrate is 0.159 cm thick, with a relative permittivity of 2.2.
The initial voltage across the capacitor is 5V and the initial current through the inductor is 100 mA. A switch is thrown at t=0 such that the circuit is connected in parallel with a 50 mA independent current source.
Calculate the capacitive reactance/ph such that the load power factor is increased to 0.98 lag and calculate the percentage reduction in line current with this value of capacitive reactance in circuit.
Design a three-port resistive divider for an equal power split and a 100 Ω system impedance. If port 3 is matched, calculate the change in output power at port 3 (in dB) when port 2 is connected first to a matched load, and then to a load having a..
Write a Matlab program to calculate the electric field due to a line of charge of length 1m. a) Describe the line of charge as a collection of point charges centered on the z-axis. Calculate the electric scalar potential of that same line of charge.
Assume that the RF signal is applied to the sum port of the hybrid, and that the LO signal is applied to the difference port.
The normalized lowpass filter with a cutoff frequency of 1 rad/sec is given as Hp(s) 1/s+1. Use Hp(s) and the BLT to obtain an corresponding IIR digital high passs filter with a cutoff of 30 Hz, assuming a sampling rate of 200 hz,
A wire has a resistance of 29.7-ohm . It is melted down, and from the same volume of metal a new wire is made that is 4 times longer than the original wire. What is the resistance of the new wire
pressure limits of 10 kPa and 8 MPa, with reheat occurring at 4 MPa. The temperature of steam at the inlets of both turbines is 500°C, and the enthalpy of steam is 3185 kJ/kg at the exit of the high-pressure turbine
A silicon semiconductor resistor is in the shape of a rectangular bar with a cross sectional area of 1x10-6 cm2 a length of 0.1 cm and is doped with a donor concentration of 5x1016 cm-3. (a) Calculate the resistance of this resistor at 300K.
What are IDS and IPS? What can they protect them against? Write a 2-3 page paper that fully answers the questions.
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