EC6701 RF AND MICROWAVE ENGINEERING Important questions
EC6701 RF and microwave engineering Important questions regulation 2013 anna university free download. RF and microwave engineering EC6701 Important questions pdf free download.
Sample EC6701 RF and microwave engineering Important questions:
TWO MARK QUESTIONS-ANSWERS
1. Define s-matrix
In a microwave junction there is intersection of three or more
components.There will be an output port ,in addition there may be reflection from
the junction of other ports.Totally there may be many combinations,these are
represented easily using a matrix called S matrix.
2 What are the .Properties of s-matrix?
It possess symmetric property sij =sji
It possess unitary property [s][s]*=[i] (EC6701 RF and microwave engineering Important questions)
3. Why is s-matrix used in MW analysis?
S matrix is used in MW analysis to overcome the problems which occurs when
H,Y,&Z parameters are used in high frequencies.
Equipment is not readily available to measure total voltage &total current at
the ports of the network.
Short and open circuits are difficult to achieve over a broad band of
frequencies.
Active devices,such as power transistor &tunnel diodes,frequently won‟t
have stability for a short or open circuit.
4. Give ABCD matrix for a two port network
V1=A B V2
I1 C D -I2
5. What is ABCD matrix?
ABCD matrix is a transmission matrix. These parameters express voltage and
current at output in terms of those at input port.
V1=AV2-BI2
I1=CV2-DI2 (EC6701 RF and microwave engineering Important questions)
6. What are the advantages of ABCD matrix?
They are used in power transmission lines.
They are very helpful in the case of cascade networks.
16 mark questions (EC6701 RF and microwave engineering Important questions)
1.Explain in detail about 2-cavity klystron amplifier.
2. Explain about the reflex klystron.
3. Explain about TWT amplifiers.
4. Explain about magnetron oscillator.
5. Numerical problems.
-calculation of output voltage, power,efficiency for 2-cavity klystron amplifier, reflex klystron,magnetron,TWTamplifiers.
6.What are the properties of scattering matrix for a lossless junction?
7.What are ferrites devices.Explain in detail the different ferrite devices
(EC6701 RF and microwave engineering Important questions)
| Subject Name | RF and microwave engineering |
| Subject code | EC6701 |
| Regulation | 2013 |
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