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A F Vaquero, Teixeira, J., Matos, S., M. Arrebola, Costa, J. R., João M. Felício...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

@misc{vaquero2023_1734974924228,
	author = "A F Vaquero and Teixeira, J. and Matos, S. and M. Arrebola and Costa, J. R. and João M. Felício and Fernandes, C. A. and Fonseca, N. J. G.",
	title = "Design of Low-Profile Transmitarray Antennas With Wide Mechanical Beam Steering at Millimeter Waves",
	year = "2023",
	doi = "10.1109/TAP.2023.3243796",
	howpublished = "Ambos (impresso e digital)",
	url = "https://doi.org/10.1109/TAP.2023.3243796"
}

TY  - GEN
TI  - Design of Low-Profile Transmitarray Antennas With Wide Mechanical Beam Steering at Millimeter Waves
T2  - IEEE Transactions on Antennas and Propagation
VL  - 71
AU  - A F Vaquero
AU  - Teixeira, J.
AU  - Matos, S.
AU  - M. Arrebola
AU  - Costa, J. R.
AU  - João M. Felício
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://doi.org/10.1109/TAP.2023.3243796
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  -