This course covers the foundational principles and advanced techniques for designing RF and microwave filters, focusing on their role in separating specific frequency bands. For instance, it explains how tuning a radio to a particular station relies on filters to isolate desired frequencies. The course begins with the basics of lossless filters, emphasizing their importance in maximizing power transmission. It introduces two-port reciprocal networks, characterized by ABCD parameters, and explains the concept of image impedance for matching source and load impedances. Learners explore symmetrical networks, where characteristic impedance ensures efficient signal transmission. The course also delves into low-pass, high-pass, and band-pass filter designs using Tee and Pi configurations, addressing limitations of constant-k filters. Finally, it introduces m-derived filters to enhance attenuation near cutoff frequencies, demonstrating their application in composite designs for improved performance.
This course has been developed by Prof. Amitava Bhattacharya from IIT Kharagpur 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/117105138.
