Near- intermediate- and far-electric field signal processor for microwave landing systems

This paper presents a method for imaging an aircraft landing along a curved trajectory. An identification of the size of the aircraft and its angular position are obtained from the electric fields scattered. The three distinguishable features inherent to the electric field are also exploited. The development of a signal processor to track the bank and pitch attitude angles of the aircraft from the phase and magnitude of the scattered field is presented. When the aircraft is close to the ground radar system, the distinguishing features of the three elements of the scattered field are described. The three elements are separated in the Fourier domain, and are used to image the aircraft wing and body with respect to the radar plane.