this paper provides a parameter sensitivity analysis for an Inverted F antenna mounted on a cylindrical conducting body with a conical nose. Since the dimensions of such an antenna is not unique and considering necessary specifications, such as bandwidth, gain, input impedance and radiation pattern, design of the appropriate antenna is a compromise between different variables. Designed antennas were simulated using a full wave simulator and their radiation patterns and return loss were studied. The simulated data were compared with measurement results.