Two types of finite-element boundary-integral (FE-BI) formulations are developed to determine the characteristic modes (CMs) of general composite material objects. The electromagnetic (EM) fields inside the general objects with inhomogeneous anisotropic material are flexibly formulated using the finite-element (FE) formulations, while the EM fields outside… (More)
To rapidly capture the electromagnetic scattering behavior of electrically large and complex structures, we have developed a hybrid high frequency (HF) simulation tool through the combination of different asymptotic methods, such as physical optics (PO), shooting and bouncing rays (SBR), and physical theory of diffraction (PTD). Careful consideration of… (More)
This paper reports our efforts in the development of a fast hybrid high frequency method through addressing four crucial aspects: (i) how to hybridize the physical optics, physical theory of diffraction, and shooting and bouncing rays (pO-PTD-SBR); (ii) how to extend the PO-PTD-SBR to handle objects with thin layer coatings; (iii) how to speed up the… (More)
This paper is to review recent development of characteristic mode (CM) theory and its applications including CM theory for integrated structural antenna design and layered medium structures.
The modern graphics processing unit (GPU) programming technique is applied to speed up the simulation of the performance of GPS antenna installed on a self-driving car in practical environments with the method of moments (MoM) and physical optics (PO) hybrid technique. To take good advantage of GPU acceleration, the MoM part, ray tracing, PO current… (More)
Efficient modelling of the performance of antennas mounted on electrically large and complex platform is essential for practical antenna design with considering environment effect and yet a challenging area in electromagnetic compatibility (EMC) assessment. This paper presents our team efforts to tackle this problem through three ways: (1) fast full-wave… (More)
In this paper, the discontinuous Galerkin (DG) finite-element time-domain (FETD) method is developed to model electromagnetic (EM) structures with waveguide excitations. Several specific issues about the DG-FETD modeling are addressed. First, the higher order tetrahedral elements are employed to accurately model the geometry of EM structures and effectively… (More)