{'fraction_non_alphanumeric': 0.038338658146964855, 'fraction_numerical': 0.024494142705005325, 'mean_word_length': 4.766871165644171, '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}}
Design of a 1-Bit Broadband Low-Cost Metal-Only Reconfigurable Reflectarray with Polarization Transforming Capability

In this paper, a 1-bit broadband low-cost metal-only reconfigurable reflectarray (RRA) is designed at X-band. The 3-D spiral ladder element consists of a square base, a circular turntable and three ladders with different heights. By rotating the proposed 3-D RRA element mechanically, the 1-bit reflected phase and orthogonal polarization transforming are achieved. Then, a 26×26 metal-only RRA is designed and fed by 20° offsetting corrugated horn. The simulated gain of the pencil beam is 27.7 dBi @10.0GHz with aperture efficiency of 27.5%. And the −1 dB gain bandwidth is 24%, it shows that proposed RRA has a broadband characteristic. Compared with the RRA printed on the multilayer substrates which adjusts phase by switching RF switches, the proposed metal-only RRA has simple structure and no additional RF loss.