A direction finding antenna system for determining the relative bearing of a second aircraft from a first aircraft in conjunction with a Traffic Alert Collision Avoidance System (TCAS). The system includes a first antenna and a second antenna located on a top surface of the first aircraft, spaced apart...http://www.google.de/patents/US7583223?utm_source=gb-gplus-sharePatent US7583223 - Distributed and Cable reduced TCAS
