Filters are a complex topic. I have designed them for over 20 years. The topic of symetery is interesting in that most are symeterical if looked at with the frequency scale in log format and if a "full bandwidth" approximation is used.The best I can suggest is to provide some references you can use to gain a better understanding of filters. "Handbook of Filter Synthesis" by Anatol I. Zverev 1967 This is great for the tables but does not provide the necessary ne-normilization equations. "Filtering in the Time and Frequency Domains" by Herman J. Blinchikoff 1976. This is an advanced text that will require some study. "The Analysis, Design, and Synthesis of Electrical Filters" by DeVerl S. Humpherys 1970. This is a graduate course in filter synthsis. "Electronic Filter Design Handbook" by Arthur B. Williams. This is an entry level book but is filled with errors so you almost need to know the material before using it. But it can provide some useful information. and last "comprehensive Filter Design" by Lee R Watkins 1997. This has a lot of useful information and most all of the de-normaiization equations as well as a host of graphs to assist in the design of filters. Good Luck!
Thanks for the education! I have observed for many years that filter pass-bands are not symetrical, but I had not had an adequate explanation until this one. So thanks for not only explaining the cause, but also describing a solution. Of course, after those series sections are added the design is not really a simple filter any more. BUT having a good explanation is certainly worthwhile. Thanks for the educational post!
The company says it anticipates high-definition video for home security and other uses will be the next mature technology integrated into the IoT domain, hence the introduction of its MatrixCam devkit.
Siemens and Georgia Institute of Technology are partnering to address limitations in the current additive manufacturing design-to-production chain in an applied research project as part of the federally backed America Makes program.
Most of the new 3D printers and 3D printing technologies in this crop are breaking some boundaries, whether it's build volume-per-dollar ratios, multimaterials printing techniques, or new materials types.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.