Antenna installed performance using diffraction theory

It is the performance of an antenna when installed in a complete system that is important. In situ measurements and measurements on scale models can be impractical or too costly. Computation of the performance of antennas on aircraft or spacecraft has considerable advantages, and may use the method of moments or diffraction theory. The paper concentrates on discussing the use of diffraction theory to compute the radiation patterns of low-gain antennas installed on conducting structures