Radiation by a Slotted Conducting Elliptic Cylinder Coated by a Nonconfocal Dielectric

The characteristics of a slot antenna on a perfectly conducting elliptic cylinder coated by a nonconfocal dielectric are investigated experimentally. Tow prototypes of non-coated and dielectric-coated elliptic slot antennas are designed, fabricated, and tested. The simulations and measurements results of non-coated and nonconfocal coated slot antennas are compared and discussed. It is found that the radiation patterns due to coating material become more directive.