{'fraction_non_alphanumeric': 0.012903225806451613, 'fraction_numerical': 0.0, 'mean_word_length': 5.75, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Advanced antenna concepts and experimental setups for DOA and tracking at Fraunhofer FHR

The Fraunhofer-Institute for High Frequency Physics and Radar Techniques FHR investigates novel antenna technology and signal processing in particular for radar applications. In this paper we will address selected examples reaching from single antennas (multi-arm spiral antenna) over conformal vibration controlled arrays to wideband arrays for electronic support measures up to airborne multi channel phased arrays for SAR/MTI and future concepts for positioning and tracking of air-targets using netted passive coherent radars.