An optimal design for RLSA (radial line slot array) antenna useful for
DBS reception is presented. Classical geometries and structures given
in the literature are first used. It is found that in some cases thes
e are not suitable. So, optimization techniques by using the right obj
ective functions have been applied. Two different methods were develop
ed and three antennas were designed. Numerical results and comparisons
with other similar antennas give the advantages of our design.