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Vaquero, Á. F., Teixeira, J., Matos, S. A., Arrebola, M., Costa, J. R., Felício, J. M....Fonseca, N. J. G. (2023). Design of low-profile transmitarray antennas with wide mechanical beam steering at millimeter waves. IEEE Transactions on Antennas and Propagation. 71 (4), 3713-3718

A. Vaquero et al.,  "Design of low-profile transmitarray antennas with wide mechanical beam steering at millimeter waves", in IEEE Transactions on Antennas and Propagation, vol. 71, no. 4, pp. 3713-3718, 2023

@article{vaquero2023_1744057829843,
	author = "Vaquero, Á. F. and Teixeira, J. and Matos, S. A. and Arrebola, M. and Costa, J. R. and Felício, J. M. and Fernandes, C. A. and Fonseca, N. J. G.",
	title = "Design of low-profile transmitarray antennas with wide mechanical beam steering at millimeter waves",
	journal = "IEEE Transactions on Antennas and Propagation",
	year = "2023",
	volume = "71",
	number = "4",
	doi = "10.1109/TAP.2023.3243796",
	pages = "3713-3718",
	url = "https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8"
}

TY  - JOUR
TI  - Design of low-profile transmitarray antennas with wide mechanical beam steering at millimeter waves
T2  - IEEE Transactions on Antennas and Propagation
VL  - 71
IS  - 4
AU  - Vaquero, Á. F.
AU  - Teixeira, J.
AU  - Matos, S. A.
AU  - Arrebola, M.
AU  - Costa, J. R.
AU  - Felício, J. M.
AU  - Fernandes, C. A.
AU  - Fonseca, N. J. G.
PY  - 2023
SP  - 3713-3718
SN  - 0018-926X
DO  - 10.1109/TAP.2023.3243796
UR  - https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8
AB  - Mechanical beam steering using a single Transmitarray (TA) can be a cost-effective solution for a high-gain antenna with wide-angle scanning. Elevation scanning can be achieved by a linear displacement of the feed in the focal plane parallel to the aperture of diameter D. When designing compact terminals with a short focal length F and with high gain, the aberrations caused by this mechanical movement become the main limiting factor for the maximum scanning range. This work presents a novel design method for devising the TA phase correction with an even distribution of these aberrations among all beam directions. A significant improvement in the scanning performance is achieved when compared with the conventional single-focus phase correction approach. To validate the proposed approach, we consider a TA design at Ka-band (30 GHz) F/D≅0.34. A multifocal TA design was manufactured using 3D printed unit-cells. To highlight the proposed concept, the antenna configuration is stripped to the bare minimum: a perforated dielectric slab with in-plane mechanical movements in front of an open-ended standard waveguide used as feed. This antenna scans up to 50°, with a gain of 25 dBi at 30 GHz, 2.5 dB of scan loss, SLL <-10 dB and 1dB-bandwidth of 6.7%.
ER  -