Filter Design — Lesson 7

This lesson covers the intricate details of filter design. It introduces the concept of constant K and M derived filters, which fall under the category of image filters. It further discusses the propagation constant and image impedance. The lesson concludes with an explanation of the synthesis of filters, particularly broad band filters.

Video Highlights

00:15 - Introduction
01:29 - image filters and types
02:39 - Constant k filter.
03:02 - Explanation of image impedance and propagation constant
15:49 - m derived filters
21:30 - Summary

Key Takeaways

- Narrow band filters have special properties due to distributed elements like shorted transmission lines.
- Constant K and M derived filters are a class of narrow band filters known as image filters.
- Image impedance and propagation constant are two parameters that characterize the unit cells of these filters.
- M derived filters offer higher attenuation in the stop band but do not completely solve the problem of image impedance not being constant with frequency.
- A combination of constant K and M derived filters can offer improved characteristics.