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A wideband transmitarray antenna based on the substrate integrated waveguide polarization twister
Author(s) -
Chen GuanTao,
Jiao YongChang,
Zhao Gang
Publication year - 2021
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.22555
Subject(s) - wideband , polarization (electrochemistry) , optics , materials science , bandwidth (computing) , optoelectronics , physics , engineering , telecommunications , chemistry
In this paper, a novel wideband transmitarray antenna based on the substrate integrated waveguide (SIW) polarization twister is presented. First, a novel wideband transmitarray element based on the SIW polarization twister is designed. The element consists of only one substrate layer sandwiched with two metallic layers, which can be used to rotate polarization of the transmission wave 90° relative to that of the incident wave. The element and its mirror image can provide 0° and 180° phase shifts with 1‐bit phase quantization and more than 80% polarization conversion rates in the 11.5 to 19.2 GHz band. Then, based on the proposed SIW element, a 441‐element wideband SIW transmitarray antenna is designed, fabricated and measured. Tested results demonstrate that the proposed SIW transmitarray obtains 48% 3 dB gain bandwidth, and its peak gain at 15 GHz is 25 dBi. Its sidelobe levels and cross‐polarization levels are less than −15 and −30 dB in the operating band, respectively. Tested results agree consistently with the simulation ones, demonstrating effectiveness of the transmitarray design method.