Modeling of planar spiral antenna mounted on a rocket shaped structure using wedge diffraction analysis

The location of the antenna on an aircraft plays a major role in improving the system performance. It is essential to locate the antennas in such a way that their radiation characteristics will be least distorted even under the influence of surroundings and EMI/EMC problems due to other electronic systems already installed on the aircraft. To predict the distortion in the radiation pattern of a planar cavity backed spiral antenna on board airborne platform, a novel technique is used using wedge diffraction theory. The experimental measurements are carried out in an anechoic chamber. The results predicted in the elevation plane is compared with experimental results and found to agree well.