Abstract
Summary form only given. The complete presentation was not made available for publication as part of the conference proceedings. Foreign object debris (FOD) on airport runways can cause problems (e.g., runway closure, accidents) to airplanes and airport operators if not removed immediately. Hence, airport operators need to remove any FODs that are detected via a manual or automated FOD detection system. Manual detection implies that airport operators carry out periodical manual FOD inspection while automated FOD detection is able to perform rapid detection continuously without any airport personnel on-site. Automated detection system also avoids unnecessary runway closure due to manual inspection, which is inefficient for busy airport operation. Millimeter-wave radar is often chosen as the sensor of the automated FOD detection system, due to its high-sensitivity, high-range resolution and weather robustness. In general, a millimeter-wave signal has significantly higher transmission loss (including free-space propagation loss and atmospheric attenuation) compared to microwave bands, making it difficult to obtain high power in semiconductor circuits and as such, the detection range of a single radar will be limited. Hence, many radio access units (RAUs) need to be installed to cover the whole span of an airport runway. However, the cost and footprint of millimeter-wave synthesizer with high precision, for the realization of precise radiolocation services, are too high to install them in each RAU.
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