Perturbation analysis of corrugated dielectric waveguide with application to millimeter-wave filters
Abstract
The propagation characteristics of the TM mode wave in a two-dimensional dielectric slab with a sinusoidal corrugation are theoretically analyzed. A coupled-mode equation is derived for describing the coupling between the forward and backward waves near Bragg frequency caused by the corrugation and the Brillouin diagram is clarified. The theoretical characteristics of the reflection filter made of a dielectric slab with a finitely long corrugation are investigated. Using a Teflon slab loaded with a rectangular corrugation, experiments are conducted on the reflection filter in the 40-GHz band and the results are compared with theoretical values. It is found that such filter characteristics as the Bragg frequency, return loss and stopband half-width agree well with theoretical predictions.
- Publication:
-
Electronics Communications of Japan
- Pub Date:
- July 1981
- Bibcode:
- 1981JElCo..64...80O
- Keywords:
-
- Corrugating;
- Dielectrics;
- Microwave Filters;
- Millimeter Waves;
- Perturbation Theory;
- Waveguide Filters;
- Backward Waves;
- Coupled Modes;
- Performance Prediction;
- Propagation Modes;
- Transmission Loss;
- Wave Reflection;
- Electronics and Electrical Engineering