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A certain cellular telephone antenna has an input impedance at f=1.0 GHz modeled by a shunt R-C combination, with R=200Ω and C=2.0pF. Because of manufacturing restrictions, you can only work with microstrip, and cannot use vias or wrap-around grounds, i.e. all your stubs must be open-circuited. Design a matching network that consists of balanced stubs of either 1/8 or 3/8 wavelength (choose the shortest length that will work) and a quarter-wave transformer. Sketch the microstrip network, and label the lengths and characteristic impedances of the lines. You do not need a Smith chart to do this. Your sketch should depict the equivalent source on the left and antenna (load) network on the right, with the matching network in between.
Explain the principle of a thermocouple. Give two examples of some common thermocouples. Thermocouples : They are used for the measurement of temperature. While two wires of v
Q. A balanced delta-connected load with a per-phase impedance of 30+j10 is connected in parallel with a balanced wye-connected load with a per phase impedance of 40-j10 . This l
duality of x+y''
Define the second group of 32 ASCII character codes? The second group of 32 ASCII character codes include various punctuation symbols, special characters, and the numeric digit
Q. How does a MOSFET amplify electrical signals? While a minimum requirement for amplification of electrical signals is power gain, one finds that a device with both voltage an
Q. For the capacitor shown in Figure connected to a voltage source, sketch i(t) and w(t).
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An electric heater element is made of Nichrome wire having resistivity equal to 100 ×10 -8 ohm-metre. The diameter of the wire is 0.3 mm. Calculate the length of the w
IGBT ( Insulated Gate Bipolar Transistor ) IGBT stands for insulated gate bipolar transistor. It is having the advantages of both power MOSFET and BJT. In IGBT layer is P
Q. How can a JFET be used as a constant current source? Explain from the drain characteristics. As the VDS voltage is increased from 0 to a few volts, the current will increase
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