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The Luneberg lens. The simulation shown on the cover of this book is known as a Luneburg lens. The lens is defined by a permittivity = 0[2 - (r/R) 2], where R is the radius of the lens; the permittivity smoothly transitions to that of free space at its edge.
(a) Replicate the simulation on the cover for a 2D TM mode, at a frequency of 2 GHz with a lens of radius 1 m. Use a second-order Mur boundary on all edges. How well does the lens produce a plane wave as you vary the input frequency?
(b) Wrap the Luneberg lens with a total-field/scattered-field boundary, and run the simulation in reverse: excite the space with a plane at the left edge of the TF/SF boundary. Observe how well the Luneberg lens brings the incident plane wave to a focus. Compare its performance as you vary the input frequency.
An input signal of 10V at 0o and a frequency of 1592 Hz is applied to a parallel RC circuit with resistor R = 100 ohm and capacitor C = 1 F. what is The source current.
A single phase 50KVA ,2400/240 V , 60 Hz distribuition transformeris used as a step down transformer is used as step down transformer at the load end of a 2400 voltfeeder whose series impedance is (1+j2)ohms .
A digital system has three registers AR, BR, PR. Three flip flops provide the control variables for the system: S is a flipflop that is set by an external Start signal to start theoperation, and F and R are two flip flops used in sequencing the mi..
A cable TV receiver has an input impedance of 200?. The cable TV distribution system uses RG-6 cable. This cable has a characteristic impedance of 75?. Design an impedance matching stage to maximize the power transfer from the wire to the receiver..
if we have a signal source impedance that is almost as high as the input impedance of the inverting Op Amp (Rin) what effect would that have. How much signal would appear at the inverting input of the Op Amp.
A 750-N.m torque is applied to a hollow shaft having the cross section shown and a uniform 6-mm wall thickness. Neglecting the effect of stress concentrations, determine the shearing stress at points a and b.
an electric kettle is required to heat 0.6 litre of water from 10 degrees celcius to boiling point in 5 minutes,the supply voltage being 240 volts. The efficiency of the kettle is 87%. Assume the specific heat capacity of water to be 4190J/kg.K
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.
The purpose of this course is to enable me to: learn about a versatile field of Industry Robotics to upgrade my skills in Electro-technology - define the meaning of Industrial Robotics
The latest Lithium-ion batteries and double-layer ultra-capacitors have amazing energy-storage capacities. However, the voltage of a single cell is usually not sufficient for higher power applications, and series connection is then required.
The voltage ratings are 4800v rms and 240v rms for the primary and secondary windings, respectively. The transformer is rated to 10KVA. Now we want to use this transformer at 120Hz. Discuss the factors that must be considered in setting ratings ap..
Does the growth on an intergrated circuit graph look surprisely slow or surprisely fast?
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