Title :
Analysis of electromagnetic radiation from shaped-end radiators using the finite difference time domain method
Author :
Beggs, John H. ; Luebbers, Raymond J. ; Ruth, Brian G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Pennsylvania State Univ., University Park, PA, USA
fDate :
9/1/1993 12:00:00 AM
Abstract :
The finite difference time domain (FDTD) technique is a popular method for analyzing electromagnetic scattering, radiation, and penetration problems. Several authors have recently applied the FDTD method to antenna radiation problems. To date, the antenna structures considered have been wire and conical monopole antennas, rectangular waveguides, pyramidal horn antennas, and microstrip antennas. Results from these analysis have been in the form of normalized field patterns and no results showing absolute gain have been presented. The article demonstrates the first staircased application of the FDTD method to the analysis of radiation from circular waveguides and other shaped-end radiators. Results of absolute gain versus angle are shown for a straight-cut circular waveguide and for two different shaped-end radiators. All FDTD analyses are full three-dimensional computations and are compared in each case with measured data
Keywords :
antenna radiation patterns; circular waveguides; electromagnetic wave scattering; finite difference time-domain analysis; horn antennas; microstrip antennas; monopole antennas; rectangular waveguides; EM penetration; FDTD; absolute gain; angle; antenna radiation problems; conical monopole antennas; electromagnetic radiation; electromagnetic scattering; finite difference time domain method; measured data; microstrip antennas; normalized field patterns; pyramidal horn antennas; rectangular waveguides; shaped-end radiators; straight-cut circular waveguide; three-dimensional computations; wire antennas; Electromagnetic analysis; Electromagnetic radiation; Electromagnetic scattering; Electromagnetic waveguides; Finite difference methods; Horn antennas; Microstrip antennas; Rectangular waveguides; Time domain analysis; Wire;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
