期刊
IEEE ACCESS
卷 11, 期 -, 页码 71088-71096出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2023.3293655
关键词
Transmitarray antenna; SatCom; SOTM; dual-band; dual-polarization; polarization manipulation
This paper presents a novel design and experimental characterization of a dual-band, shared aperture transmitarray operating in dual linear polarization at K/Ka-band. It is based on a 1-bit unit-cell realized using five metal layers and demonstrates low transmission loss (< 2 dB). The proposed transmitarray is able to shape the beam independently in both K- and Ka-bands by combining the polarization rotation method and the stacked patch architecture. Experimental results show excellent agreement with numerical and full-wave electromagnetic simulations. The antenna system is a low-cost and compact solution for future vehicular broadband SatCom applications.
This paper proposes a novel design and the experimental characterization of a dual-band, shared aperture transmitarray operating in dual linear polarization at K/Ka-band. It is based on a 1-bit unit-cell realized using five metal layers and demonstrating low transmission loss (< 2 dB). By combining the polarization rotation method and the stacked patch architecture, the proposed shared aperture transmitarray is able to shape the beam independently in both K- and Ka-bands. A $40\times 40$ -element prototype has been optimized by using an ad-hoc numerical tool and fabricated. The experimental results are in excellent agreement with the numerical and full-wave electromagnetic simulations. This flat lens is illuminated by two standard gain horns with a nominal gain of 10 dBi. They are mounted in orthogonal polarization and located at the same distance from the aperture (110 mm). A peak gain of 27.1 and 29.9 dBi has been achieved, respectively, at 18.7 and 28.5 GHz corresponding to an aperture efficiency of 26.1 and 22.3%. The possibility to steer mechanically the radiation pattern has also been experimentally proven. The proposed antenna system is a low-cost and compact solution for future vehicular broadband SatCom applications.
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