Title :
Radiation from a rectangular waveguide with a lossy flange
Author :
Yoshitomi, Kuniaki ; Sharobim, Hadi R.
Author_Institution :
Dept. of Comput. Sci. & Commun. Eng., Kyushu Univ., Fukuoka, Japan
fDate :
10/1/1994 12:00:00 AM
Abstract :
The radiation from a rectangular waveguide with a lossy flange coating is studied both analytically and experimentally. An analytic method using Fourier analysis and an impedance boundary condition is proposed. The experiment was performed using a flange covered with a rubber ferrite sheet at an X-band frequency. The numerical and measured results agree well and show that the lossy flange improves the E-plane radiation pattern and the crosspolar radiation. A boresight gain drop of about 2 db is predicted theoretically and measured experimentally
Keywords :
Fourier analysis; antenna radiation patterns; antenna theory; boundary-value problems; rectangular waveguides; waveguide antennas; waveguide theory; E-plane radiation pattern; Fourier analysis; X-band frequency; boresight gain drop; crosspolar radiation; impedance boundary condition; lossy flange coating; rectangular waveguide; rubber ferrite sheet; Boundary conditions; Coatings; Ferrites; Flanges; Frequency; Gain measurement; Impedance; Loss measurement; Rectangular waveguides; Rubber;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
