Abstract
Airborne signal intelligence (SIGINT) systems must be capable of locating radio signal sources. Direction finding (DF) to support this capability is an important factor. There are some practical considerations to be taken when designing the array configuration of a DF system for airborne SIGINT systems. This paper summarizes the practical factors when designing the array configuration of the DF system for airborne SIGINT. In particular, it focuses on four areas: antenna consideration factors when installing the DF system for airborne SIGINT from a practical point of view, array configuration methods for airborne communications intelligence and electronic intelligence, and a numerical analysis to select the optimum antenna position for airborne SIGINT.
Highlights
An aircraft signal intelligence (SIGINT) system is used strategically and tactically to gather signals from radar and communications systems
Because SIGINT systems require the ability to locate the source of enemy signals [1], direction finding (DF) to support this capability is an important requirement and basically operates in a wide frequency range from 20 MHz to 40 GHz [2]
To perform DF over this wide frequency range and a wide field of view (FOV), airborne SIGINT uses several antennas according to the frequency range
Summary
An aircraft signal intelligence (SIGINT) system is used strategically and tactically to gather signals from radar and communications systems. This section focuses on the array spacing without angle ambiguity, the DF accuracy of an interferometer DF system, some methods for obtaining multiple element arrays, and the probability of ambiguity based on the signal to ratio (SNR) and array configuration type for a three-element array. It describes the computational electromagnetic (CEM) modeling and simulation needed to accurately estimate the performance of the DF antenna array. It is shown that the Security and Communication Networks computation results obtained from AntOpt agree with those from FEKO, which is based on a moment method and widely used in computational electromagnetic studies
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