Integrated ATC mode S Transponder and Collision Avoidance System

This paper describes a new design concept of airborne equipment of secondary radar systems. The concept allows implementing two of principal airborne systems, more exactly the Mode S transponder and TCAS, in a single multifunctional unit. This concept gives a possibility to make two times less the number of necessary aircraft antennas and achieve some other advantages. The prototype of the system is described and the results of flight test are presented.