MindStudy - MindStudy

Question:

Published on: 15 January, 2025

What is scattering Parameters? Why is it used in microwave Network?

Answer:

Any two port networks are represented by a special type of parameter by which reflection co- efficient or transmission co – efficient of any network is measured. This special type of parameter is called scattering parameter of S - parameter.

Characteristics of microwave devices can be represented by its scattering parameters (S- parameters) instead of conventional Z, Y or hybrid parameter for following reason

No equipments are readily available to measure total voltage and total currents at the ports of the network.
Over a broad band of frequencies it is difficult to achieve short and open circuits.
Active devices like tunnel diode and power transistors frequently will not have stability for a short or open circuit. The scatter parameters are the reflection co- efficient of a port and transmission co- efficient between different ports with other ports matched terminated. These are also the frequently measured quantities and can be measured readily with the help of a network analyzer.

Subjects

Analog Communication Basic Electrical Engineering Power Electronics Electrical Engineering Management Power System I Radio Frequency and Microwave Engineering

Trending

Compare and contrast the bunching operation in a two cavity klystron and reflex klystron.

15 January, 2025

An air filled rectangular waveguide of inside dimensions 7 X 3.5 cm2oprtates in the dominant mode TE₁₀

Find the cut-off frequency
Determine the guide wavelength of 3.5 GHz

15 January, 2025

With the neat sketch, explain working principle of a two – hole directional coupler. Derive the scattering matrix of magic Tee. A multi hole directional coupler is fed with single power of 2.8 mW at 10 GHz. The coupling factor is 3 dB and the directivity is better than 40 dB over X-band range. Find the distribution of power at all other ports.

15 January, 2025

Write short note on Magnetron Oscillator.

15 January, 2025

Describe the operation of an ideal four port ‘directional coupler’. Define ‘Coupling’ and ‘Directivity’ in the context of a directional coupler.

15 January, 2025