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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.
Find the magnitudes of velocities vA and vB in Figure 3.25, where, theta = 20.0 degree and vtot = 5.88 m/s.- Find the components of vtot along the x and y axes in Figure 3.25, where theta = 22.5 degree and vtot = 5.48 m/s.
The LM358 op amp can be a single or dual supply op-amp. This mean that it can operate with just a single supply i.e. + 5 volt or with dual supplies i.e. (+ and -) 5 volt supplies. With a inverting configuration with dual supplies (+5v and -5v) bei..
Use the formula for decibels, 20*log(|T|), to find out what the -3db value would be in Volts per volt when the pass band is 1 V/V, 2 V/V, 3 V/V. find the way to find this critical frequency value with out converting to decibels
Determine the maximum possible heat removal rate through the fin. What fin length would provide a close approximation to the heat rate found in part (a)? Hint: Refer to Example 3.9.
a four pole 60hz 50 hp synchronous motor has an applied line voltage of 480 volts and draws 60a from the line. it is
a single phase 100 kVA, 1000/100 V transformer gives the following test results: Open Circuit test: 100V, 6.0 A and 400 W Short Circuit test: 50V, 100A and 1800W At what load will maximum efficiency occur
The transfer function contain two complex conjogate
An object of mass m = 0:1 kg is dropped from a high tower. Suppose the magnitude of the force due to air resistance is 0:98v2. (The gravitational constant is g = 9:8 m s2 ). a) Write down the dierential equation satisfied by velocity.
Refrigerant 134a enters a steady flow, andiabatic revesible turbine as saturated vapor at 1200kPa and expands to 100kPa. If the power produced by the turbine is 100kW, find the volume flow rate of the refrigerant at the turbine exit.
A uniform surface charge density of 20 [nC/m^2] is present on the spherical surface r=.6 cm in free space. (a) Find the absolute potential Φ at P(r =1cm,θ=25,φ=50). (b) Find Vab, given points a(r=2cm,θ=30,φ=60), and b(r=3cm,θ=45,φ=90)
What are the rated current and internal generated voltage of this generator? What field current does this generator require to operate at the rated voltage, current, and power factor?
Show that the complex envelope of the sum of two bandpass signals (with the same carrier frequency) is equal to the sum of their individual complex envelopes.
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