Efficient integral equation analysis of 3-D rectangular waveguide microwave circuits by using green’s functions accelerated with the Ewald method
In this contribution, an electric field integral equation (EFIE) formulation is proposed, for the analysis of microwave circuits based on rectangular waveguides with an unlimited number of arbitrarily 3-D-shaped conducting elements. For this purpose, the Lorenz gauge rectangular waveguide Green’s fu...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad Politécnica de Cartagena(UPCT) |
| Repositorio: | Repositorio Digital UPCT |
| OAI Identifier: | oai:repositorio.upct.es:10317/16706 |
| Acceso en línea: | https://ieeexplore.ieee.org/document/10508573 http://hdl.handle.net/10317/16706 |
| Access Level: | acceso abierto |
| Palabra clave: | Electric field integral equation (EFIE) Electromagnetic field evaluation Ewald method Green’s function Method of moments (MoM) Rectangular waveguide circuits Scattering parameters Teoría de la Señal y las Comunicaciones 3325.04 Enlaces de Microondas |
| Sumario: | In this contribution, an electric field integral equation (EFIE) formulation is proposed, for the analysis of microwave circuits based on rectangular waveguides with an unlimited number of arbitrarily 3-D-shaped conducting elements. For this purpose, the Lorenz gauge rectangular waveguide Green’s functions are used. Moreover, the Ewald method has been employed to significantly speed up the evaluation of these rectangular waveguide Green’s functions. Strategies are also proposed to switch between different ways of calculating the Green’s functions depending on the source-observation distance along the propagation direction. In addition, the method of moments (MoM) has been applied to solve the EFIE. Following the application of this technique, the impedance matrix resulting from the MoM has been divided into dynamic and static parts, thus reducing the computational time required to obtain the frequency response of practical 3-D microwave circuits by up to a factor of 3 compared with the traditional formulation. On the other hand, a generic expression is derived to evaluate the multimode scattering parameters of rectangular waveguide circuits, independently on the mode used to excite the structure. The evaluation of the electromagnetic fields inside the rectangular waveguides has also been carried out. The proposed technique has been validated by comparison with results provided by commercial full-wave software, such as ANSYS HFSS and CST Studio Suite, showing good agreement and good numerical efficiency. |
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