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An electromagnetic wave of amplitude 10 V/m and frequency f =1 GHz is propagating in air and it is incident on a perfectly conducting medium. The angle of incidence is 30?. Electric field is polarized perpendicular to the plane of incidence. Neatly draw a diagram illustrating the problem and showing the co-ordinates you plan to use.
(a) Write expressions for the electric and magnetic fields of the incident wave.
(b) Find the fields of the reflected wave. Show your work neatly and give briefly reasons for the major mathematical steps in your work. Draw figures if they help you to explain your work.
(c) Describe the transmitted wave.
(d) Derive an expression for the surface current density (Js) on the conductor surface. In a diagram show the vector relationships among Js , the magnetic field Hs at the surface of the conductor, and the incident electric field vector.
A critical aspect of web design is the approach that you take to define and develop the parameters of your site. This includes your review and assessment of your own work to validate your site to make sure that it meets the needs of your client.
In a scanning electron microscope, an electron is accelerated by a static electrode biased with a 12 kV voltage relative to the electron source. Upon bombarding the sample the electron “kick out†photons with specific wavelength.
A 78oham lossless planar line was designed but did not meet a requirement. What fraction of the widths of the strip should be added or removed to get the characteristic impedance of 75oham
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A three-phase, 318.75-kVA, 2300-V alternator has an armature resistance of 0.35 /phase and a synchronous reactance of 1.2 /phase. Determine the no-load line-to-line generated voltage and the voltage regulation
Using a 3-V power supply, design a version of the circuit of fig 6.62 from the book. to provide a dc emitter current of 0.5 mA and to allow a +-1-V signal swing at the collector. The BJT has a nominal B=100. Use standard 5 % resistor values
What are the techniques used to make feedback system stable? Explain and draw the frequency response of a 1-pole feedback amplifier.
If the total power amplification through the receiver stages is G_R find the output power of the receiver. If the noise power at the output is identical to the noise power at the input of the receiver, find the NF for the receiver.
The message signal x(t), in the following system has a nabdwidth of 10kHz. The center frequecy of the Narrow Band Frequency Modulated (NBFM) signal nbfm(f) is 1Mhz, the frequency deviation f1=1khz and the amplitude of the NBFM signal is 1V.
A dc shunt motor of 50 hp, 250 V is connected to a 230 V supply and is drawing an armature current of 200 A, and is running at speed of 1200 rpm. Its armature resistance is Ra = 0.2 ohms.
The capacitor has to have the following specifications: Needs to provide 100 horsepower for 10 hours Max operation voltage of 480V The min and max for the dielectric and metals are: 10 nm
A sinusoidal voltage source of v(t) = 170 cos(2pi 60 t) V is applied to a nonlinear load, resulting in a nonsinusoidal current that is expressed in Fourier series form as i(t) = 10 cos(2pi 60t + 30) + 6 cos (4pi 60t + 45) + 3 cos(8pi 60t + 20) A.
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