Analysis of radiation patterns of inverted-F antenna on a cylindrical conducting body like a satellite launcher

Radiation patterns are analyzed for inverted-F antennas (IFAs) on a cylindrical conducting body like a satellite launcher. Especially, radiation patterns of IFAs on a cylindrical conducting body are simulated and quantitatively analyzed according to the number of IFAs, the length and the diameter of the cylindrical conducting body, and polarization of the antenna for reception in the ground system. IFAs are fabricated and their return losses and radiation patterns are measured. Good agreements are observed between the simulated and measured results. Finally, the effect of gain patterns on the system link is simulated for KSLV (Korea Space Launch Vehicle)-I to be launched in the near future.