## Abstract

We propose a hybrid integral equation approach that combines the volume integral equation (VIE) and the surface integral equation to model the mixed dielectric and conducting structures. The volume integral equation is applied to the material region and the surface integral equation (SIE) is enforced over the conducting surface. This results in a very general model as all the volume and surface regions are modeled properly. The advantage of this approach is that in the coated object scattering problem, the coating material can be inhomogeneous, and in the printed circuit and microstrip antenna simulation problem the substrate can be of finite size. Another advantage of this approach is the simplicity of the Green's function in both the VIE and SIE. However the additional cost here is the increase of the number of unknowns since the volume that is occupied by the dielectric material is meshed. This results in a larger memory requirement and longer solution time in solving the MoM matrix equation. But this deficiency can be overcome by applying fast integral equation solvers such as the multilevel fast multipole algorithm. We first give the formulation of the problem using the method of moments (MoM), and then show numerical simulation results to demonstrate the validity of the proposed method.

Original language | English |
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Title of host publication | IEEE Antennas and Propagation Society International Symposium |

Subtitle of host publication | Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting |

Pages | 2562-2565 |

Number of pages | 4 |

ISBN (Electronic) | 078035639X, 9780780356399 |

DOIs | |

State | Published - 1999 |

Event | 1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999 - Orlando, United States Duration: Jul 11 1999 → Jul 16 1999 |

### Publication series

Name | IEEE Antennas and Propagation Society International Symposium: Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting |
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Volume | 4 |

### Conference

Conference | 1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999 |
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Country/Territory | United States |

City | Orlando |

Period | 7/11/99 → 7/16/99 |

### Bibliographical note

Funding Information:This work was supported by the Air Force Office of Scientific Research under Grant No. F4962C-96-1-0025, the National Science Foundation under Grant No. NSF ECS93- 02145, and the Office of Naval Research under Grant No. N00014-95-1-0812.

Funding Information:

This work was supported by the Air Force Office of Scientific Research under Grant No. F49620-96-1-0025, the National Science Foundation under Grant No. NSF ECS93-02145, and the Office of Naval Research under Grant No. N00014-95-1-0812.

Publisher Copyright:

© 1999 IEEE.

## ASJC Scopus subject areas

- Computer Networks and Communications
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Radiation