Title :
Near-field patterns from pyramidal horn antennas: numerical calculation and experimental verification
Author :
Metzger, Don W. ; Norgard, John D. ; Sega, Ronald M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Colorado Springs, CO, USA
fDate :
8/1/1991 12:00:00 AM
Abstract :
The electromagnetic field close to a pyramidal horn antenna has been predicted using a numerical technique assuming a spherical phase front in the aperture of the horn. Comparison with experimental results using an infrared imaging technique has shown that the best fit is for a phase front that is 1.25 times more curved than a sphere. The infrared imaging method has been demonstrated to be very useful for mapping the fields in a region that is sensitive to the introduction of metallic probes
Keywords :
antenna radiation patterns; directive antennas; numerical methods; waveguide antennas; aperture; electromagnetic field; experimental results; infrared imaging; near field patterns; numerical technique; pyramidal horn antennas; spherical phase front; Antenna accessories; Aperture antennas; Electromagnetic fields; Geometry; Horn antennas; Infrared imaging; Integral equations; Maxwell equations; Surface fitting; Surface waves;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
