Title :
Gain enhancement of annular slot antennas
Author :
Noghanian, S. ; Shafai, L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Manitoba Univ., Winnipeg, Man., Canada
fDate :
4/2/2001 12:00:00 AM
Abstract :
The gain enhancement of an annular slot antenna fed by a cavity is studied numerically. The method of moments for bodies of revolution is used as a numerical tool for the simulations. The effect of different parameters is investigated and methods for gain enhancement are proposed. It is shown that the antenna gain can be increased by adding a dielectric layer, or conducting ring above the slots. An open cavity with additional chokes can also be used to decrease the backlobe level and increase the gain
Keywords :
directive antennas; loop antennas; method of moments; slot antennas; annular slot antenna; antenna directivity; antenna gain; backlobe level; bodies of revolution; cavity-fed antenna; chokes; conducting ring; dielectric layer; gain enhancement; method of moments; numerical method; open cavity; radiation patterns;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings
DOI :
10.1049/ip-map:20010331
