Title :
Rigorous modal-expansion analysis of asymmetrical dipole antennas
Author :
Shen, Zhongxiang ; Macphie, Robert H.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
fDate :
11/1/2001 12:00:00 AM
Abstract :
This paper describes a rigorous analysis of asymmetrical cylindrical dipole antennas by the modal-expansion method. The analysis is facilitated by introducing two parallel conducting plates to enclose the dipole antenna. Field expressions for all the subregions of the resulting structure can be readily derived, and the expansion coefficients are found by enforcing the continuity conditions of tangential field components across the regional interfaces. Comparison of computed results with experimental data shows an excellent agreement. Numerical results are also presented for the input impedances, current distributions, and radiation patterns of various dipole antennas
Keywords :
antenna radiation patterns; current distribution; dipole antennas; electric impedance; modal analysis; EM field expressions; asymmetrical cylindrical dipole antennas; continuity conditions; current distribution; expansion coefficients; input impedance; modal-expansion analysis; parallel conducting plates; radiation patterns; regional interfaces; tangential field components; Antenna radiation patterns; Antenna theory; Current distribution; Dipole antennas; Helium; Impedance; Integral equations; Moment methods; Receiving antennas; Wire;
Journal_Title :
Antennas and Propagation, IEEE Transactions on