Title :
Radiation characteristics of microstrip antenna on the superstrate-loaded cylindrical bianisotropic substrates
Author :
Yoon, Joung Han ; Lee, Sang Mok ; Gyoo Chul Au ; Lee, Hwa Choon
Author_Institution :
Dept. of Electron. Eng., Inha Univ., Inchon, South Korea
Abstract :
The effects of the superstrate on the radiation patterns of a dipole on cylindrical bianisotropic substrates were studied. Special constitutive relations are used to describe the bianisotropic properties of the material, such that the Green´s function can be formulated. Electromagnetic fields and boundary conditions in the spectral region were used to find Green´s function of the spectral representation and electromagnetic fields in the space region were derived through inverse Fourier transformations of the fields in the spectral region using asymptotic formula for far zone. The radiation characteristics of an axial Hertzian dipole on superstrate loaded cylindrical bianisotropic substrates were obtained. The effects of the bianisotropic-superstrate on the radiation properties of the antennas including beam scanning, directivity enhancement, dark-region illumination, and on the horizon radiation, are discussed
Keywords :
Green´s function methods; antenna radiation patterns; conformal antennas; dipole antennas; electromagnetic fields; microstrip antennas; Green´s function; asymptotic formula; axial Hertzian dipole; beam scanning; bianisotropic properties; boundary conditions; conformal antenna; dark-region illumination; dipole antenna; directivity enhancement; electromagnetic fields; horizon radiation; inverse Fourier transformations; microstrip antenna; radiation characteristics; radiation patterns; space region; spectral region; spectral representation; superstrate-loaded cylindrical bianisotropic substrates; Boundary conditions; Dielectric substrates; Dipole antennas; Educational institutions; Electromagnetic fields; Electromagnetic scattering; Green´s function methods; Microstrip antennas; Optical scattering; Tensile stress;
Conference_Titel :
TENCON 99. Proceedings of the IEEE Region 10 Conference
Conference_Location :
Cheju Island
Print_ISBN :
0-7803-5739-6
DOI :
10.1109/TENCON.1999.818466
