Abstract
Modern direction finding (DF) methods usually use antenna arrays to receive information from an unknown radiation source, and further process the information in order to locate the transmission source. Small aperture array is easy to carry, install, deploy and operate because of small volume, light weight, and it is preferred to large aperture array, and is frequently used in many aspects such as the navigation of ships and aircrafts, locating interfering or illegal transmitters. But at the same time, small aperture array has poor performance in precision. This work demonstrates the signals received by small aperture array are processed coupled, and the differences between signals in amplitude and phase are amplified greatly, which makes it possible that small aperture array is able to have good performance.
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