Monopole antenna patterns on finite size composite ground planes

Geometrical theory of diffraction methods have been used to develop models and to predict the patterns of communications, navigation, and identification (CNI) blade antennas mounted on finite size composite ground planes. The computed patterns agree extremely well with measurements. It has been shown, both analytically and experimentally, that very minor differences between patterns of antennas mounted on perfectly conducting and composite ground planes appear for conductivities equal to 10⁴s/m.