REFLECTION RESONANCES IN A RECTANGULAR WAVEGUIDE SECTION WITH A PAIR OF ANTIPODAL RECTANGULAR POSTS
Intentional and controllable introduction of attenuation poles into the frequency responses of frequency-selective devices is in the great demand in the design of modern filters with complicated performance. Successful implementation of such an approach is possible using rectangular waveguide sectio...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Akademperiodyka
2016-03-01
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| Series: | Радиофизика и электроника |
| Subjects: | |
| Online Access: | http://re-journal.org.ua/sites/default/files/file_attach/2016-1/5.pdf |
| Summary: | Intentional and controllable introduction of attenuation poles into the frequency responses of frequency-selective devices is in the great demand in the design of modern filters with complicated performance. Successful implementation of such an approach is possible using rectangular waveguide sections with metallic inserts. Here, the scattering characteristics of such sections with a pair of antipodal rectangular posts as waveguide units with rotational symmetry are studied. Comparative analysis with the characteristics of a section with a pair of unidirectional posts is performed. Spectral theory of open waveguide resonators is used in order to interpret the resonant phenomena. Within the frames of spectral theory the reflection resonances formed by such sections are the responses to the excitation of eigen oscillations of complex frequencies. It is shown that the spectral theory enables an order of magnitude more accurate (in comparison with the conventional modal analysis) evaluation for basic parameters of the resonance reflection, namely its frequency and the quality factor. The results obtained make preliminary synthesis of frequency selective devices based on such sections physically transparent and more accurate. |
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| ISSN: | 1028-821X 2415-3400 |