{'fraction_non_alphanumeric': 0.024615384615384615, 'fraction_numerical': 0.0020512820512820513, 'mean_word_length': 5.550335570469799, '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}}
Orbital Angular Momentum Waves Multiplexing Transmission Experiment Based on Pseudo-Coplanar Scheme

Electro-Magnetic (EM) Waves with different Orbital Angular Momentum (OAM) modes can be multiplexed to enjoy the high spectrum efficiency and transmission rate. However, the OAM waves can hardly be multiplexing transmitted to long-distance in free space especially at the Radio Frequency (RF) band due to its inverted cone beam structure. As a promising solution to overcome the difficulties, the OAM multiplexing with distributed pseudo-coplanar relay is highlighted with experimental demo and evaluation. In this paper, we realize a real-time multiplexing transmission experiment with four OAM modes at 10 GHz. Specifically, the pseudo-coplanar scheme is also demonstrated by a helicopter experiment, which emulates the ground-to-air transmission process between the ground station and the satellite formations when OAM EM waves are applied in the satellite communications.