Microwave Semiconductor Devices

This course covers the characteristics, applications, and theoretical underpinnings of various microwave semiconductor devices. For instance, it delves into the details of microwave bipolar transistors and Field Effect Transistors (FET), discussing their operation, design geometries, equivalent circuit model, biasing, DC characteristics, AC analysis, and noise figure. The course also explores different types of diodes, such as Schottky diodes, tunnel diodes, PIN diodes, Gunn diodes, IMPATT diodes, and Varactor diodes. It explains their structure, operation, mathematical modeling, and practical applications. For example, it discusses how the impedance of PIN diodes can be controlled by changing the bias of the device, enabling a switching action, and how Varactor diodes function as a variable reactor and are used in frequency tuning of local oscillators.

This course has been developed by Dr. Ratnajit Bhattacharjee from IIT Guwahati for NPTEL. It is now accessible through Ansys Innovation Space courtesy of the partnership between Ansys and NPTEL, under the CC BY-SA license. For more details, visit https://nptel.ac.in/courses/108103141.