Highly efficient technique for solving radiation and scattering problems

Chen, Y.; Simpson, Ted; Ho, T.Q.

doi:10.1049/ip-h-2.1992.0002

Cited by 11 publications

(8 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the model is limited in size due to the simulation time and amount of memory required to simulate larger devices. Methods to ease the requirements of three-dimensional models include use of Graphics Processing Units (GPU), parallel processing, and mode simplifications [21][22][23]. Since threedimensional model parameters scale in simulation time like N4 and in memory like N3, the two-dimensional FDTD is used in this paper to simulate this model to avoid unnecessary complications [24].…”

Section: Simulation Modelmentioning

confidence: 99%

Improvement of solar cell efficiency using nano-scale top and bottom grating

2011

View full text Add to dashboard Cite

We study solar-cell designs using nano-grating on both top (transmission) and bottom (reflection) of the solar cell. First, we perform simulations based on rigorous coupled wave analysis (RCWA) to evaluate the diffraction top gratins. In RCWA method, we calculate up to 20 harmonics, and sweep the launch angle of incident light from 0 to 90 degree. The incident light varies from100nm to 1200nm wavelength. Triangular grating can achieve higher light absorption compared to the rectangular grating. The best top grating is around 200nm grating period, 100nm grating height, and 50% filling factor, which responses to 37% improvement for triangular grating and 23% for rectangular grating compared to non-grating case. Then, we use Finite-Difference Time-Domain (FDTD) to simulate transmission/reflection double grating cases. We simulated triangular-triangular (top-bottom) grating cases and triangular-rectangular (topbottom) grating case. We realize solar cell efficiency improvement about 42.4%. For the triangulartriangular (top-bottom) grating case, the 20% efficiency improvement is achieved. Finally, we present weighted-light simulation for the double grating for the first time and show the best grating can achieve 104% light improvement, which is quite different from traditional non-weighted calculation.

show abstract

Section: Simulation Modelmentioning

confidence: 99%

Improvement of solar cell efficiency using nano-scale top and bottom grating

2011

View full text Add to dashboard Cite

show abstract

“…The spherical Bessel functions 9 19 in Eq. (16) are given by 17) and the spherical Hankel functions 9 20 are defined by…”

Section: Near Field: Multipole Expansion Of the Vector Green's Functionmentioning

confidence: 99%

Near Field and Optical Diffraction of 3D Dielectric Corner by Transmission Line Modeling and Multipole Expansion of Green's Function

Massaro¹,

Cingolani²,

Passaseo³

et al. 2009

Jnl of Comp & Theo Nano

View full text Add to dashboard Cite

We propose a novel modeling of the dielectric cubic corner, that is suitable for inclusion in a standard electromagnetic (EM) simulator. The model starts from a consideration of the equivalent current densities on the cube facets. It proceeds by employing a classical multipole expansion of the Green's function at the corner and introduces the novel principle of Simultaneous Transverse Resonance Diffraction (STRD) in order to determine the singularity of the EM field. The novel STRD approach considers the analogy between the EM field in proximity of the 90 deg. dielectric corner and resonant transmission lines. We combined the analytical and the numerical approaches in order to obtain an efficient numerical procedure. The theory is validated by standard finite element method (FEM) simulation, yielding information about the accuracy of the near field around the dielectric corner.

show abstract

“…In order to derive a compact representation of antenna radiation behavior, the field quantities can be expanded by a compact set of spherical eigenmodes whose weights are computed from the appropriate current distribution on the antenna surface (e.g. Chen et al (1992)). This field expansion yields a distinct set of vector expansion coefficients that is solely dependent on the excitation and the geometrical shape of the antennas taken into consideration.…”

Section: Antennas For Broadband Polarization Diverse Transmissionmentioning

confidence: 99%

“…The latter mathematical description yields a representation of antenna radiation patterns with a reduced order and therefore provides the advantage of an analytical approach in the description of multielement antenna transmission parameters. Therefore we present a modified technique of spherical mode expansion as in Chen et al (1992) based upon a computation of vector expansion coefficients of the field approach that were directly derived by the surfacecurrent distribution on the antenna elements taken into con-Correspondence to: O. Klemp (klemp@hft.uni-hannover.de) sideration.…”

Section: Introductionmentioning

confidence: 99%

Computation of antenna pattern correlation and MIMO performance by means of surface current distribution and\\ spherical wave theory

2006

View full text Add to dashboard Cite

Abstract. In order to satisfy the stringent demand for an accurate prediction of MIMO channel capacity and diversity performance in wireless communications, more effective and suitable models that account for real antenna radiation behavior have to be taken into account. One of the main challenges is the accurate modeling of antenna correlation that is directly related to the amount of channel capacity or diversity gain which might be achieved in multi element antenna configurations. Therefore spherical wave theory in electromagnetics is a well known technique to express antenna far fields by means of a compact field expansion with a reduced number of unknowns that was recently applied to derive an analytical approach in the computation of antenna pattern correlation. In this paper we present a novel and efficient computational technique to determine antenna pattern correlation based on the evaluation of the surface current distribution by means of a spherical mode expansion.

show abstract

Highly efficient technique for solving radiation and scattering problems

Cited by 11 publications

References 8 publications

Improvement of solar cell efficiency using nano-scale top and bottom grating

Improvement of solar cell efficiency using nano-scale top and bottom grating

Near Field and Optical Diffraction of 3D Dielectric Corner by Transmission Line Modeling and Multipole Expansion of Green's Function

Computation of antenna pattern correlation and MIMO performance by means of surface current distribution and\\ spherical wave theory

Contact Info

Product

Resources

About