Imaging of a two-dimensional target by means of hologram matrix

The concept of a hologram matrix and its application to radar was first considered by Ogura and Iizuka (1973). Both phase and amplitude can be measured for holographic applications involving the radio and ultrasonic frequency region. A hologram matrix H(mn) is a matrix recording of such a complex wave field at the nth receiver of an antenna array when the target is illuminated by the mth transmitter. Approaches are discussed for obtaining the two-dimensional shape of a target from a H(mn) which is associated with a one-dimensional antenna array. An investigation is conducted concerning the design of a radar or a sonar on the basis of the considered principles.