{'fraction_non_alphanumeric': 0.026595744680851064, 'fraction_numerical': 0.005319148936170213, 'mean_word_length': 5.075268817204301, '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}}
High Aperture Efficiency 2D Center-fed Transmission Line-Grid Antenna

This paper proposes a 2D single-point-fed transmission-line grid design that operates as a standing-wave antenna (SWA) featuring both extremely high aperture and radiation efficiencies. The generated pencil beam is directed at broadside. This broadside beam is maintained over a reasonable bandwidth and does not squint or split with frequency. The proposed structure is simply center-fed from the back using a coaxial cable where a printed λ/4-transformer matching network is also integrated.