Calculations on Mode Eigenvalues in a Corrugated Waveguide with Varying Diameter and Corrugation Depth

The present paper addresses numerical calculations on the eigenvalues of hybrid modes in corrugated circular waveguides with varying diameter and corrugation depth. Such calculations are essential for the numerical optimization of advanced mode converters and diameter tapers for future low-loss high...

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Bibliographic Details
Published in:Journal of infrared, millimeter and terahertz waves millimeter and terahertz waves, 2021-05, Vol.42 (5), p.493-503
Main Authors: Haas, Daniel, Thumm, Manfred, Jelonnek, John
Format: Article
Language:English
Subjects:
Broadband
Circular waveguides
Classical Electrodynamics
Converters
Corrugated waveguides
Corrugation
Coupled modes
Eigenvalues
Electrical Engineering
Electronics and Microelectronics
Engineering
Hybrid modes
Instrumentation
Low earth orbits
Mathematical analysis
Optimization
Space debris
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Summary:The present paper addresses numerical calculations on the eigenvalues of hybrid modes in corrugated circular waveguides with varying diameter and corrugation depth. Such calculations are essential for the numerical optimization of advanced mode converters and diameter tapers for future low-loss high-power microwave applications, like broadband high-power radar sensors for space debris observation in low earth orbit (LEO). Corresponding mode converters and diameter tapers may be synthesized based on coupled mode theory. Of particular importance here is the ability to consider varying mode eigenvalues along the perturbed waveguide. The procedure presented here is able to consider arbitrary variations of the corrugation depth as well as the waveguide diameter and therefore is highly flexible. The required computational effort is low. Limitations of the method are discussed.
ISSN:1866-6892
1866-6906
DOI:10.1007/s10762-021-00791-w