Contour path FDTD method for analysis of pyramidal horns with composite inner E-plane walls

The contour path finite-difference time-domain (FDTD) method is used for modeling pyramidal horn antennas with or without composite E-plane inner walls. To model the pyramidal horn surface, a locally distorted grid is used. Modified equations are obtained based on the locally distorted grid and the assumptions of the contour path method. The developed algorithm is validated by comparing computed antenna gain patterns, with and without the presence of composite material, with available measurements. >

[1]  Charles M. Knop,et al.  On the fields in a conical horn having an arbitrary wall impedance , 1986 .

[2]  Andreas C. Cangellaris,et al.  Point-matched time domain finite element methods for electromagnetic radiation and scattering , 1987 .

[3]  P. A. Tirkas,et al.  Finite-difference time-domain method for antenna radiation , 1992 .

[4]  B. Beker,et al.  Detailed FD-TD analysis of electromagnetic fields penetrating narrow slots and lapped joints in thick conducting screens , 1988 .

[5]  C. S. Lee,et al.  A simple circular-polarized antenna: circular waveguide horn coated with lossy magnetic material , 1988 .

[6]  A. Taflove,et al.  Numerical Solution of Steady-State Electromagnetic Scattering Problems Using the Time-Dependent Maxwell's Equations , 1975 .

[7]  Rosemary A. Renaut,et al.  Higher order absorbing boundary conditions for the finite-difference time-domain method , 1992 .

[8]  J.J.H. Wang,et al.  The magnetically coated conducting surface as a dual conductor and its application to antennas and microwaves , 1990 .

[9]  Allen Taflove,et al.  Finite-difference time-domain modeling of curved surfaces (EM scattering) , 1992 .

[10]  Constantine A. Balanis,et al.  Antenna Theory: Analysis and Design , 1982 .

[11]  P. A. Tirkas,et al.  Modeling of thin dielectric structures using the finite-difference time-domain technique , 1991 .

[12]  Glenn S. Smith,et al.  The efficient modeling of thin material sheets in the finite-difference time-domain (FDTD) method , 1992 .

[13]  C. M. Knop,et al.  An Absorber-Wall Parallel-Plate Waveguide , 1986 .