{'fraction_non_alphanumeric': 0.03566121842496285, 'fraction_numerical': 0.03714710252600297, 'mean_word_length': 4.760683760683761, '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 Selectivity Dual-Band Bandpass Filter for 5G Mobile Communications

A high selectivity dual-band bandpass filter working at sub-6 GHz spectrum for 5G mobile communications is designed. It consists of two folded open-loop stepped-impedance resonators with four transmission zeros. To further improve the selectivity of the filter, a spur-line is employed to generate another transmission zero (TZ) between the two passbands. The proposed dual-band bandpass filter is operated at 3.61 GHz and 5.54 GHz, its working bands are 3372-3883 MHz and 5072-5889 MHz. The filter has a low insertion loss, compact size, high band-to-band isolation and high selectivity performance.