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Novel wideband metal‐only transmitarray antenna based on 1‐bit polarization rotation element
Author(s) -
Chen GuanTao,
Jiao YongChang,
Zhao Gang
Publication year - 2020
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22388
Subject(s) - wideband , optics , polarization (electrochemistry) , materials science , bandwidth (computing) , physics , optoelectronics , engineering , telecommunications , chemistry
In this article, a novel wideband metal‐only transmitarray based on 1‐bit polarization rotation element is proposed. First, a novel wideband polarization rotation element is designed, which consists of four metallic layers without any substrate layers. The element can be used to rotate polarization of the transmission wave by 90° with respect to that of the incident wave. The element and its mirror image can provide 0° and 180° phase shifts with 1‐bit phase quantization in the 9.2 to 11.2 GHz band with more than 80% polarization conversion rate. Then, by using the proposed element, a 21 × 21‐element transmitarray with a standard pyramidal horn feed is designed and fabricated. The measured results show that the transmitarray achieves 16.8% 1‐dB gain bandwidth with a peak gain of 21.6 dBi. Its cross‐polarization and side‐lobe levels are below −20 and −10 dB, respectively, in the operating band. The measured results agree well with the simulation ones, validating effectiveness of the transmitarray design method.