Abstract
This paper presents an analysis of the backscattering of a dielectric resonator (DR) due to the antenna mode and the structural mode. More specifically, we focus on the structural mode scattering since the discussion of the RCS of DRs in the past has concentrated on analyzing the 'Eigenmodes' only. Therefore, we present evidence for its existence and provide a qualitative and quantitative approximation. It is found that the structural scattering of a DR with high rel. permittivity can be approximated by the scattering of a metal body of the same dimensions as the DR. Furthermore, a mathematical model of the antenna mode scattering is provided using the multipole expansion and with the aid of filter theory. As a result of the superposition of both scattering modes, it is found that the structural mode scattering slightly alters the appearance of the 'Eigenmodes' in frequency position, scattering level, quality factor, and shape.
| Original language | English |
|---|---|
| Title of host publication | 15th European Conference on Antennas and Propagation, EuCAP 2021 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (Electronic) | 9788831299022 |
| DOIs | |
| State | Published - 22 Mar 2021 |
| Externally published | Yes |
Publication series
| Name | 15th European Conference on Antennas and Propagation, EuCAP 2021 |
|---|
Bibliographical note
Publisher Copyright:© 2021 EurAAP.
Keywords
- Dielectric resonator
- EM scattering
- Eigenmodes
- multipole expansion
- radar cross section
- structural mode
- transient scattering
ASJC Scopus subject areas
- Computer Networks and Communications
- Signal Processing
- Instrumentation
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