Faculty of Engineering Handbook

MICROWAVE DEVICES


Subject Code:	EMG2026
Objective:	To provide a general understanding of various microwave devices’ characteristics, principles of operation and applications.
Pre-Requisite:	EMG2016 Electromagnetic Theory
Credit Hours:	3
Contact Hours:	51 hours (lectures, tutorials and laboratory experiments)
Assessment:	Lab:10% Test/Quiz:15% Tutorial/Assignment:15% Final Examination:60%
Laboratory:	1. Characteristics of Reflex Klystron 2. Characteristics of Gunn Diode
References:	Charles A. Lee, G. Conrad Dalman, "Microwave Devices, Cicuits & Their Interaction", John Wiley & Sons, Inc., 1994. Samuel Y. Liao, "Microwave Devices and Circuits", Prentice-Hall, 1990. Theo G. Van De Roer, "Microwave Electronic Devices", Chapman & Hall, 1994. Annapurna Das and Sisir K Das, “ Microwave Engineering”

Course Contents

Overview of Microwave Devices

Development history of microwave devices. Overview of performance characteristics and applications of various classes of microwave devices. Overview of Band Theory and semiconductors: band structure, E-k diagram, Fermi level, work function.

Microwave Diodes

Principle of operation and microwave characteristics of p-i-n Diodes, Schottky Diodes, Varactor Diodes and Tunnel Diodes. Applications of the above devices in microwave circuits.

Microwave Bipolar Transistors

Principle of operation and microwave characteristics of Bipolar Transistors and Heterojunction Bipolar Transistors. Applications of the above devices in microwave circuits.

Microwave Field Effect Transistors

Principle of operation and microwave characteristics of JFET, MESFET, HEMT, MOSFET and CCD. Applications of the above devices in microwave circuits.

Transferred Electron Devices

Gunn effect. Differential Negative Resistance, Two-Valley Model Theory, High Field Domain. Criterion for classifying the modes of operation, Gunn Oscillation Modes, Limited-Space-Charge (LSA) Mode, Stable Amplification Mode. Microwave generation and amplification.

Avalanche Transit-Time Devices

Principle of operation and characteristics of Read Diodes, IMPATT Diodes, TRAPATT Diodes and BARITT Diodes. Applications of the above devices in microwave circuits.

Microwave Tubes

Principle of operation and characteristics of Klystrons, Travelling-Wave Tubes, and Magnetrons.

Learning Outcome of Subject

At the completion of the subject, students should be able to:

explain the concept of band theory

explain the operating principles of microwave diodes

discuss the important features of microwave bipolar transistors and its applications in microwave circuits

identify and discuss the important features of microwave field effect transistors and their uses in microwave circuits

explain the theory of Transferred Electron Devices in microwave generation and amplification

describe the principle of operation of Avalanche transit time devices

explain the operating principles of microwave tubes

undertake, under supervision, laboratory experiments on microwave diodes and electron tubes.

Programme Outcomes (% of contribution)

Ability to acquire and apply fundamental principles of science and engineering - 20%

Capability to communicate effectively - 10%

Acquisition of technical competence in specialised areas of engineering discipline - 60%

Ability to work effectively as an individual, and as a member/leader in a team - 10%