Analysis of Antenna Around NURBS Surface With Hybrid MoM-PO Technique

The hybrid method of moments and physical-optics (MoM-PO) approach is used to calculate the radiation pattern of antenna around arbitrarily shaped structure. The structure is modeled with Non-uniform rational B-spline (NURBS) surfaces. The hybrid MoM-PO approach is implemented by modifying the impedance matrix of the MoM region with PO. Formula for the scattered PO field is deduced for cases of antenna located around NURBS surface. The stationary phase method (SPM) is applied for the integral of the induced current in the PO region. Results obtained from this method and from MoM-PO approach based on triangle facet model agree well while the former is more efficient in execution time

[1]  Rafael P. Torres,et al.  Computation of the RCS of complex bodies modeled using NURBS surfaces , 1995 .

[2]  Fernando Obelleiro,et al.  Improvement of the hybrid moment method–physical optics method through a novel evaluation of the physical optics operator , 2001 .

[3]  R. Hodges,et al.  An iterative current-based hybrid method for complex structures , 1997 .

[4]  M. Cátedra,et al.  Stationary phase method application for the analysis of radiation of complex 3-D conducting structures , 2001 .

[5]  J. C. Cooke.  Stationary Phase in Two Dimensions , 1982 .

[6]  Roger F. Harrington,et al.  Field computation by moment methods , 1968 .

[7]  Fernando Obelleiro,et al.  Hybrid moment-method physical-optics formulation for modeling the electromagnetic behavior of on-board antennas , 2000 .

[8]  Olga M. Conde,et al.  Analysis of antennas on board arbitrary structures modeled by NURBS surfaces , 1997 .

[9]  N. Chako.  Asymptotic Expansions of Double and Multiple Integrals Occurring in Diffraction Theory , 1965 .

[10]  U. Jakobus,et al.  Improvement of the PO-MoM hybrid method by accounting for effects of perfectly conducting wedges , 1995 .

[11]  W. Burnside,et al.  A uniform GTD solution for the radiation from sources on a convex surface , 1981 .

[12]  M. Djordjevic,et al.  Higher order hybrid method of moments-physical optics modeling technique for radiation and scattering from large perfectly conducting surfaces , 2005, IEEE Transactions on Antennas and Propagation.

[13]  M. Cátedra,et al.  Application of physical optics to the RCS computation of bodies modeled with NURBS surfaces , 1994 .

[14]  Y. Rahmat-Samii,et al.  Low profile antenna study using the physical optics hybrid method (POHM) , 1991, Antennas and Propagation Society Symposium 1991 Digest.

[15]  Johan Edlund,et al.  A parallel, iterative method of moments and physical optics hybrid solver for arbitrary surfaces , 2001 .

[16]  W. Burnside,et al.  A uniform GTD analysis of the diffraction of electromagnetic waves by a smooth convex surface , 1980 .

[17]  Gerald Farin,et al.  Curves and surfaces for computer aided geometric design , 1990 .

[18]  V. A. Borovikov,et al.  Uniform Stationary Phase Method , 1994 .

[19]  Fernando Obelleiro,et al.  Including multibounce effects in the moment‐method physical‐optics (MMPO) method , 2002 .

[20]  Roderick Wong,et al.  Two-dimensional stationary phase approximation: stationary point at a corner , 1991 .

[21]  Jesus Perez,et al.  RCS of electrically large targets modelled with NURBS surfaces , 1992 .

[22]  U. Jakobus,et al.  Improved PO-MM hybrid formulation for scattering from three-dimensional perfectly conducting bodies of arbitrary shape , 1995 .