Abstract
Some new results are presented on the properties of generalized scattering matrix representations for metallic waveguides with axially periodic dielectric loadings. A unitied framework is given for describing the frequency dependence and for identifying the emergence of propagating, nonpropagating, and complex Floquet modes in single mode, as well as multimode, regions. Two new conservation relations are formulated for the generalized scattering matrix of the unit cell in lossless periodic structures. One of these relations provides a convenient means for checking the correctness of the values of calculated matrix elements, while the other relation yields accurate estimates for the stopband-passband transition frequencies located within single Floquet-mode regions.
| Original language | English |
|---|---|
| Pages (from-to) | 2336-2344 |
| Number of pages | 9 |
| Journal | IEEE Transactions on Microwave Theory and Techniques |
| Volume | 55 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 2007 |
Funding
Manuscript received April 10, 2007; revised July 25, 2007. This work was supported in part by the Scientific and Technical Research Council of Turkey under a Ph.D. support grant. The authors are with the Department of Electronics and Communications Engineering, Istanbul Technical University, TR-34469 Maslak, Istanbul, Turkey (e-mail: [email protected]; [email protected]). Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TMTT.2007.908658
| Funders | Funder number |
|---|---|
| Türkiye Bilimsel ve Teknolojik Araştirma Kurumu |
Keywords
- Complex modes
- Dispersion diagram
- Generalized scattering matrix
- Modal analysis
- Periodically loaded waveguide