RF test 2

RF test 2 - meet this requirement? 7. A 3dB attenuator is...

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Name:_______________________________ EE 4002-2 Test # 2 SSN: _______________________ Spring 2003 This test is open book, and notes: 1. For the circuit below, determine the filter order, filter shape (HPF, LPF,  BPF, or BSF), and the filter type.
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2. Design a third order Chebyshev BPF at 800 MHz.  The characteristic line  impedance is 50  .  Design for 3 dB passband ripple and a BW = 120  MHz.
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3. Determine the traditional transistor characteristics ( β , r be , r bc , r ce ) given the  following set of h-parameters. 
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4. Determine the ABCD-matrix for the circuit below.
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5. Design a matching network to transform a load impedance Z L  = 40 - j35 to  an input impedance of  Z in  = 25 + j10.  Use a minimal number of  components at the expense of bandwidth control.
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6. In problem 4, if the circuit was to be used in a broadband application, what  restriction might we place on the matching network, and how would be 
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Unformatted text preview: meet this requirement? 7. A 3dB attenuator is placed on a network to verify its operation. We observe the following S-parameters. Use these values to determine the gain, input and output impedance. What is the actual attenuation (in dB) of the device? Assume operation in a system with a characteristic line impedance of Z o = 50 . 8. A pn-diode has a reverse saturation current I S = 0.01pA at T j = 25 C and has an emission coefficient of 1.6. Find the reverse saturation current and the diode current I D if the applied diode voltage is 0.8 V and the junction temperature is 120 C. 9. Sketch all of the two element matching networks that can transform the following load impedance to an input impedance of 50 ....
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RF test 2 - meet this requirement? 7. A 3dB attenuator is...

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