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Application: Double stub matching. An antenna has an impedance of 68+j10Ω. The antenna needs to be connected to a 75 n line. Because the antenna goes on a mast, the design engineer decided to fabricate a matching section as shown in Figure 15.38. The matching section is then hoisted and connected to the antenna during installation. At the required frequency, the section is 0.3λ and two stubs are made of the same line. Calculate the lengths of the stubs, if the antenna is connected at A-A.
The temperature inside a Carnot refrigerator is maintained at 5 degrees C by rejecting heat to the surrounings at an ambient temperature of 27 degrees C. The inside temperature now decreases to -13 degrees C with the ambient temperature remaining co..
an orthogonal cutting operation is being carried out under the following conditions depth of cut 0.15mm width of cut5mm
a 85.2-kg vertically-falling skydiver experiences an upward force of air resistance of 1340 n. determine the
a mass m is suspended from a spring of stiffness 4000nm and is subjected to a harmonic force having amplitude of 100n
an insulated piston-cylinder device initially contains 0.3 m3 of carbon dioxide at 200 kpa and 27 ordmc. an electric
steam at 900 degrees f and 1200 psi enters an insulated turbine operating at a steady state through a 4 foot diamter
A cable drum for a crane is to rotate between 160 and 166 rpm. Design a gear drive for 25 hp in which the input pinion rotates at 925 rpm and the output rotates with the drum. The crane is expected to operate with a 50% duty cycle for 120 hours per w..
a power generator burns natural gas consisting of 30 ethane 60 methane and the balance nitrogen. the gas undergoes
derive the model equation mass and temperature for a cstr reactor with a first order reqaction a product. assume
An H2O boiler is designed to take 7000 lbm/hr in a steady-state process from saturated liquid at 1200 psi to an exit temperature of 900 degrees F. What is the required rate of heat transport for the boiler?
A robot arm carrying a 2.75-lb package is moving in a horizontal circle at 4 miles/hr. The arm is gradually shortened for the first 0.11 s of its motion, changing the radius of the circle. The maximum acceleration the package can withstand without da..
a constriction in a pipe will cause the velocity to rise and the pressure to fall at section 2 in the throat.nbspthe
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