Recent trends and future developments in radar displays

The paper starts with a brief recapitulation of the development of radar displays, from the simple form of moving coil plan position indicator (p.p.i.) to the development of the d.c.-coupled fixed-coil displays, capable of allowing for target marking during intertrace periods. An extension of this technique uses secondary high-speed deflection coils to provide alpha-numeric identification of the intertrace position. A description is given of a modern transistorized radar display, capable of performing the dual role of raw marked radar display or synthetic display. Improvements in cathode-ray tubes, and the need for the bright display is discussed. Particular emphasis is given to the bright direct-view storage tube, and the method of operation and performance of displays using these tubes is given. Radar to television scan conversion systems are described in both forms, using either the bombardment induced conductivity tube, or the storage vidicon. Some comments are made upon the possible use of new devices such as electroluminescent panels.