Low-cost, high-performance DF and intercept systems

Developments in analog and digital technology during the past two decades have lead to the development of low-cost high-performance easy to use Electronic Intercept and Direction Finding (EIDF) systems. These systems make extensive use of the advances of commercial digital technology but they retain technologies unique to DF systems and DF techniques. Many factors ranging from frequency, propagation, modulation, antennas and receivers must be considered in the design of a complete DF system. However, the most important DF fundamental is the method used to intercept and locate signals of interest