Abstract
This paper introduces a synthesis method for triplepassband microwave filters. A frequency transformation is developed for finding the locations of poles and zeros of the triple-passband filter. The poles and zeros obtained as such are optimized to achieve a transfer function with a reduced number of transmission zeros in order to reduce the number of cross-couplings. Sixand 12-pole triple-passband filters are synthesized for validation of this proposed method. A 12-pole triple-passband filter is fabricated with a microstripline structure and shown to provide good agreement between synthesis and measurement results. Finally, the frequency transformation for asymmetric triple-passband filters is briefly discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 187-193 |
| Number of pages | 7 |
| Journal | IEEE Transactions on Microwave Theory and Techniques |
| Volume | 56 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2008 Jan |
Keywords
- Circuit synthesis
- Microwave filters
- Triple-passband filters
ASJC Scopus subject areas
- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering
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Cite this
Lee, J., & Sarabandi, K. (2008). Design of triple-passband microwave filters using frequency Transformations. IEEE Transactions on Microwave Theory and Techniques, 56(1), 187-193. https://doi.org/10.1109/TMTT.2007.912206