THEORY EXAMINATION (SEM–VIII) 2016-17 MICROWAVE ENGINEERING & MEASUREMENT

Section A – Basic Concept Questions (Description)

Section A contains short conceptual questions that test the basic knowledge of satellite communication and microwave engineering. Students are required to explain important terms related to satellite links, signal transmission, and communication systems.

The questions in this section cover topics such as look angle, uplink design, G/T ratio, attenuation, absorption, and signal-to-noise ratio (S/N). These parameters are essential in determining the performance and reliability of satellite communication systems.

Students must also understand the effects of clouds and atmospheric conditions on satellite communication signals. Other important concepts include multiplexing techniques, error control coding, and different types of satellite systems, which are used to improve data transmission efficiency and reliability.

The objective of this section is to ensure that students understand the basic principles and terminology used in satellite communication and microwave systems.

Questions for Section A

What is the look angle in satellite communication?

What is uplink design in a satellite communication system?

Define the G/T ratio in satellite systems.

What is the cloud effect in a satellite link?

What is absorption in satellite communication?

What is the signal-to-noise (S/N) ratio for FM video transmission?

What is error control coding?

Define attenuation in satellite links.

What are the multiplexing techniques used in satellite communication?

What are the different types of satellite systems?

Section B – Descriptive Questions (Description)

Section B includes descriptive questions that require detailed explanations of satellite communication systems and microwave transmission techniques. Students must explain concepts, system designs, and operational mechanisms related to satellite communication.

One important topic in this section is VSAT (Very Small Aperture Terminal) technology, which is used for satellite-based communication networks. Students must explain its working and implementation methods.

Another key topic is satellite orbit types, including Low Earth Orbit (LEO) and other non-geostationary orbits. Understanding orbital mechanisms is essential for designing satellite communication systems.

Students are also required to explain satellite launching mechanisms, system temperature calculations, carrier-to-noise ratio (C/N), and interference effects that may affect satellite communication performance.

The section also includes questions about error detection and correction techniques used in satellite links and the working principles of GPS positioning systems.

Questions for Section B

What is VSAT? Explain different implementation methods of VSAT.

Explain different LEO and non-geostationary satellite orbits.

Explain the orbital mechanism used in satellite communication.

Explain the basic transmission theory and calculate system temperature, C/N ratio, and G/T ratio.

How are satellites launched? Explain the launching mechanism.

What are the different types of interference that affect satellite link performance?

Explain the error detection and correction mechanisms used in satellite communication.

Explain the working principle of GPS position location and discuss different GPS codes.

Section C – Long Analytical Questions (Description)

Section C includes long analytical questions related to advanced satellite communication techniques and coding methods. These questions require students to explain communication protocols and signal processing techniques used in satellite systems.

One of the important topics in this section is multiple access techniques, which allow multiple users to share the same communication channel. Students must explain techniques such as FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access), and CDMA (Code Division Multiple Access).

Another topic covered in this section is pre-emphasis and de-emphasis circuits, which are used to improve signal quality in satellite communication systems by reducing noise and distortion.

The section also includes questions related to error control coding, particularly cyclic block codes and linear block codes, which are used to detect and correct errors in digital communication systems.

Questions for Section C

Explain multiple access techniques used in satellite communication such as FDMA, TDMA, and CDMA.

Describe the pre-emphasis and de-emphasis circuits used in satellite communication links.

Explain cyclic block codes and linear block codes used in communication systems.