{'fraction_non_alphanumeric': 0.033277870216306155, 'fraction_numerical': 0.004991680532445923, 'mean_word_length': 5.02, '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}}
A High-Directive Patch Antenna Based on All-Dielectric Near-Zero-Index Metamaterial Superstrates

In this paper, we present for the first time a high-directive patch antenna based on all-dielectric near-zero-index metamaterial (NZIM) superstrates. Dielectric disks with high permittivity arranged periodically yield low refraction index around 9.25 GHz. We used a two-layer all-dielectric NZIM as the cover of a path antenna, both the simulation and experiment results show that the all-dielectric NZIM can focus the radiation energy, and the gain of the antenna with metamaterial is greatly enhanced.