{'fraction_non_alphanumeric': 0.031209362808842653, 'fraction_numerical': 0.006501950585175552, 'mean_word_length': 5.209677419354839, '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}}
Spatial distribution of the electromagnetic field in the vicinity of tapered wire medium metamaterial

The “metamaterials”, or artificial materials with electromagnetic properties, which can be designed by experimenter are of strong interest now for the GHz and THz band devices construction. One of promising realization of this idea is a wire media lens [1, 2] which also intended on the energy concentration. Moreover, it was demonstrated the possibility to make such a device (the wire-media lens), which allows to overcome the diffraction limit [3, 4] at frequencies of about 1 GHz. However, on the technological problems, the question of the realization of such structures (metamaterials) in the frequency range of tens, hundreds and more gigahertz is still open.