Ultrawide-band modeling of transient radiation from aperture antennas

A new method for the numerical calculation of transient field radiated through aperture-type antennas (slot, open-ended waveguide, and horn) is described. The finite-difference time-domain method is applied for the near-field prediction in the close surrounding of the antenna and a proper data-fitting procedure of the aperture field, involving interpolating functions with separation of space- and time dependence, permits: 1) to calculate "off-line" the radiated field without the need to store a great amount of data; 2) to avoid, in the case of far field, the numerical evaluation of radiation integral; and 3) to obtain approximate far field formulas which are still separable with regard to space and time. The method enables a full data reusability in calculation of field pattern over a wide angular range at a same time, or of the transient response at fixed observation points.

[1]  Kate A. Remley,et al.  Characterization of near- and far-field radiation from ultrafast electronic systems , 1998 .

[2]  G. Marrocco,et al.  Broad-band horn-antenna launchers modeling by FDTD and generalized scattering matrix methods , 2002 .

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

[4]  Arthur D. Yaghjian,et al.  Planar Near-Field Scanning in the Time Domain , Part 1 : Formulation , 2004 .

[5]  E. K. Miller,et al.  Model-based parameter estimation in electromagnetics. I. Background and theoretical development , 1998 .

[6]  C. Taylor,et al.  On the Singularity Expansion Method Applied to Aperture Penetration. Part I. Theory. , 1973 .

[7]  Allen Taflove,et al.  Computational Electrodynamics the Finite-Difference Time-Domain Method , 1995 .

[8]  Robert J. Fontana.  Recent Applications of Ultra Wideband Radar and Communications Systems , 2000 .

[9]  Jeffrey L. Young,et al.  Far-field time-domain calculation from aperture radiators using the FDTD method , 2001 .

[10]  Raphael Kastner,et al.  Antenna characterization in the time domain , 1997 .

[11]  J. A. Howard.  A comparison of mode match, geometrical theory of diffraction, and Kirchhoff radiation , 1973 .

[12]  G. Marrocco.  MODAL NEAR-FIELD TO FAR-FIELD TRANSFORMATION FOR FDTD MODELLING OF APERTURE ANTENNAS , 2003 .

[13]  G. Arcangeli,et al.  A Multifrequency Water-filled Waveguide Application Thermal Dosimetry In Vivo (Short Paper) , 1984 .

[14]  L. Pearson,et al.  A note on the representation of scattered fields as a singularity expansion , 1984 .

[15]  E. K. Miller,et al.  Evaluation of a processing technique for transient data , 1978 .

[16]  A. D. Yaghjian,et al.  Planar near-field scanning in the time domain .1. Formulation , 1994 .

[17]  F. Arndt,et al.  Rigorous combined mode-matching integral equation analysis of horn antennas with arbitrary cross section , 1999 .

[18]  D. Rhodes.  Synthesis of planar antenna sources , 1974 .

[19]  A. Ludwig,et al.  Radiation pattern synthesis for circular aperture horn antennas , 1966 .

[20]  C. Baum.  The singularity expansion method , 1976 .

[21]  L. P. Ligthart,et al.  Potentials of ultra-short-pulse time-domain scattering measurements , 2000 .

[22]  T. Sarkar,et al.  Using the matrix pencil method to estimate the parameters of a sum of complex exponentials , 1995 .

[23]  D. Lamensdorf,et al.  Baseband-pulse-antenna techniques , 1994, IEEE Antennas and Propagation Magazine.

[24]  Cj Railton,et al.  Reducing the computational overhead of the near-field transform through system identification , 1994 .

[25]  Ehud Heyman,et al.  A wavefront interpretation of the singularity expansion method , 1985 .

[26]  Analysis of waveguide-fed thick radiating rectangular windows in a ground plane , 1991 .

[27]  Stephen D. Gedney,et al.  An Anisotropic PML Absorbing Media for the FDTD Simulation of Fields in Lossy and Dispersive Media , 1996 .

[28]  Carl E. Baum,et al.  TOWARD AN ENGINEERING THEORY OF ELECTROMAGNETIC SCATTERING: THE SINGULARITY AND EIGENMODE EXPANSION METHODS , 1978 .