Download JNTUK M-Tech 2020 R19 ECE Circuit Design Electronics And Communication Model Question Paper

Download JNTUK (Jawaharlal Nehru Technological University Kakinada (JNTU kakinada)) M.Tech (ME is Master of Engineering) 2020 R19 ECE Circuit Design Electronics And Communication Model Previous Question Paper

5


[M19CS1104]
I M. Tech I Semester (R19) Regular Examinations
RF CIRCUIT DESIGN
ELECTRONICS AND COMMUNICATION ENGINEERING
MODEL QUESTION PAPER
TIME: 3Hrs. Max. Marks: 75 M
Answer ONE Question from EACH UNIT.
All questions carry equal marks.
*****
CO KL M
UNIT-I
1. a). Explain why skin effects are considered important for RF circuit design. 1 1 8
b). Describe briefly how passive components are realized on printed circuit
boards at RF.
1 2 7
OR
2. a). Discuss Inductors and Capacitors - Voltage and Current in RF circuits

1 2 8
b). Write short note on Tuned RF / IF Transformers.

1 2 7
UNIT-II
3. a). Compare the characteristics of coaxial line, two-wire line and a parallel
plate transmission line.
2 2 8
b). An input impedance of 25 ? of ? / 4 transformer is to be matched to a
50 ? micro strip transmission line at 500 MHz compute the length,
width and characteristic impedance of the quarter-wave parallel plate
transmission line. The thickness and relative dielectric constant of the
substrate material are given as 1 mm and 4.0 respectively. Make
assumptions if necessary.
2 1 7
OR
4. a). Define the following terms for a transmission line. i) Standing wave
ratio ii) Return loss iii) Power in dBm iv) characteristic impedance.
2 2 8
b). Derive the expression for characteristic impedance of a short circuited
transmission line.
2 2 7
UNIT-III
5. a). Describe how a tunable RF active filter can be realized. 3 3 8
b). With the help of neat diagrams describe the structure and functioning of
a HEMT.
3 4 7
OR
6. a). Write a short note on low noise, linear RF BJT operation based on its
structure?
3 3 8
b). Enumerate the importance of ?power relations? in the design of an
amplifier at high frequencies.
3 2 7
UNIT-IV
7. a). Explain how stable performance can be assured for an RF transistor
amplifier using corresponding stability circles.
4 1 8
b). Draw a neat circuit diagrams to explain how gain-bandwidth product
limitation can be overcome in an RF broadband amplifier design.
4 3 7
OR
8. a). Discuss MMIC amplifiers, 4 3 8
FirstRanker.com - FirstRanker's Choice
5


[M19CS1104]
I M. Tech I Semester (R19) Regular Examinations
RF CIRCUIT DESIGN
ELECTRONICS AND COMMUNICATION ENGINEERING
MODEL QUESTION PAPER
TIME: 3Hrs. Max. Marks: 75 M
Answer ONE Question from EACH UNIT.
All questions carry equal marks.
*****
CO KL M
UNIT-I
1. a). Explain why skin effects are considered important for RF circuit design. 1 1 8
b). Describe briefly how passive components are realized on printed circuit
boards at RF.
1 2 7
OR
2. a). Discuss Inductors and Capacitors - Voltage and Current in RF circuits

1 2 8
b). Write short note on Tuned RF / IF Transformers.

1 2 7
UNIT-II
3. a). Compare the characteristics of coaxial line, two-wire line and a parallel
plate transmission line.
2 2 8
b). An input impedance of 25 ? of ? / 4 transformer is to be matched to a
50 ? micro strip transmission line at 500 MHz compute the length,
width and characteristic impedance of the quarter-wave parallel plate
transmission line. The thickness and relative dielectric constant of the
substrate material are given as 1 mm and 4.0 respectively. Make
assumptions if necessary.
2 1 7
OR
4. a). Define the following terms for a transmission line. i) Standing wave
ratio ii) Return loss iii) Power in dBm iv) characteristic impedance.
2 2 8
b). Derive the expression for characteristic impedance of a short circuited
transmission line.
2 2 7
UNIT-III
5. a). Describe how a tunable RF active filter can be realized. 3 3 8
b). With the help of neat diagrams describe the structure and functioning of
a HEMT.
3 4 7
OR
6. a). Write a short note on low noise, linear RF BJT operation based on its
structure?
3 3 8
b). Enumerate the importance of ?power relations? in the design of an
amplifier at high frequencies.
3 2 7
UNIT-IV
7. a). Explain how stable performance can be assured for an RF transistor
amplifier using corresponding stability circles.
4 1 8
b). Draw a neat circuit diagrams to explain how gain-bandwidth product
limitation can be overcome in an RF broadband amplifier design.
4 3 7
OR
8. a). Discuss MMIC amplifiers, 4 3 8
6

b). Explain Low noise amplifiers 4 4 7
UNIT-V
9. a). With the help of neat schematics explain how oscillators shld be
configured to obtain high frequencies of oscillation. State the principle
of operation. State the principle of operation of a dielectric resonator
oscillator.
5 5 8
b). Low phase noise oscillator design 5 5 7
OR
10. a). Image Reject and Harmonic mixers, Frequency domain considerations. 5 5 8
b). Discuss abt VCOs and Crystal Oscillators 5 5 7

CO-CRSE TCOME KL -KNOWLEDGE LEVEL M-MARKS






































FirstRanker.com - FirstRanker's Choice