Download PTU M.Tech. ECE 1st Semester 75178 RF AND MICROWAVE CIRCUIT DESIGN Question Paper

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Total No. of Pages : 01

Total No. of Questions : 08

M.Tech. (ECE) (2018 Batch) (Sem.-1)

RF AND MICROWAVE CIRCUIT DESIGN

Subject Code : MTEC-PE2B-18-2

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M.Code : 75178

Time: 3 Hrs.

Max. Marks : 60

INSTRUCTIONS TO CANDIDATES :

1. Attempt any FIVE questions out of EIGHT questions.

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2. Each question carries TWELVE marks.

1. a) What is Rat-race junction? [6]
   b) Define matching network. [6]
2. a) What is the basic difference between IMPATT and TRAPATT diodes? [6]
   b) State the two parameters that describe a directional coupler. Define them. [6]

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3. a) Derive the properties of scattering matrix. [6]
   b) Explain the working operation of Transferred electron devices (TED). [6]
4. a) Derive the S matrix for H plane TEE junction. [8]
   b) Explain in detail noise figure in an amplifier. [4]
5. Derive an expression for cut off magnetic field for a cylindrical magnetron. [12]

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6. a) Describe the losses in devices. [6]
   b) Explain the working principle of Tunnel diode with performance characteristics. [6]
7. A 50 ohm lossless line connects a matched signal of 100 MHz to a load of 100 ohm. The load power is 100mW. Calculate the voltage reflection coefficient and VSWR of the Load. [12]
8. Write Short notes on (Any Two) :
   a) Microwave BJTs [6]
   

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   b) PIN diode [6]
   c) Broad band amplifier [6]

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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