Title :
Sleeve antenna with ground wires
Author :
Taguchi, Mitsuo ; Egashira, Shigeru ; Tanaka, Kazumasa
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Nagasaki Univ., Japan
fDate :
1/1/1991 12:00:00 AM
Abstract :
Pocklington´s integral equation for a sleeve antenna with ground wires is formulated. By applying the Galerkin method to this equation, a sleeve antenna, a monopole antenna with ground wires, and a sleeve antenna with ground wires are analyzed, and numerical results for these antennas are compared with measured data. The sleeve antenna features the leakage current on the surface of the coaxial feeder, suppressed by a sperrtopf, but it is mismatched with the 50-Ω feeder. The monopole antenna with inclined ground wires may be adjusted to match the 50-Ω feeder, but the leakage current induced on the feeder cannot be neglected. It is found that the sleeve antenna with ground wires has the advantages of both antennas
Keywords :
antenna earths; antenna radiation patterns; current distribution; electric impedance; integral equations; 340 MHz; Galerkin method; Pocklington´s integral equation; UHF; coaxial feeder; current distributions; electric field directivity patterns; ground wires; input impedance; leakage current; monopole antenna; sleeve antenna; sperrtopf; Antenna feeds; Antenna theory; Coaxial components; Conductors; Impedance; Integral equations; Leakage current; Mobile antennas; Moment methods; Wires;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
