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Matos, S. A., Costa, J. R., Felício, J., Fonseca, N. J. G., Vaquero, Á. F. , Arrebola, M....Fernandes, C. A. (2023). Low-cost transmit-array antenna prototype at Ka-band combining low profile and mechanical wide-angle beam scanning. In 2023 International Workshop on Antenna Technology (iWAT). Aalborg, Denmark: IEEE.

S. D. Matos et al.,  "Low-cost transmit-array antenna prototype at Ka-band combining low profile and mechanical wide-angle beam scanning", in 2023 Int. Workshop on Antenna Technology (iWAT), Aalborg, Denmark, IEEE, 2023

@inproceedings{matos2023_1734976042369,
	author = "Matos, S. A. and Costa, J. R. and Felício, J. and Fonseca, N. J. G. and Vaquero, Á. F.  and Arrebola, M. and Fernandes, C. A.",
	title = "Low-cost transmit-array antenna prototype at Ka-band combining low profile and mechanical wide-angle beam scanning",
	booktitle = "2023 International Workshop on Antenna Technology (iWAT)",
	year = "2023",
	editor = "",
	volume = "",
	number = "",
	series = "",
	doi = "10.1109/iWAT57058.2023.10171776",
	publisher = "IEEE",
	address = "Aalborg, Denmark",
	organization = "",
	url = "https://ieeexplore.ieee.org/document/10171776"
}

TY  - CPAPER
TI  - Low-cost transmit-array antenna prototype at Ka-band combining low profile and mechanical wide-angle beam scanning
T2  - 2023 International Workshop on Antenna Technology (iWAT)
AU  - Matos, S. A.
AU  - Costa, J. R.
AU  - Felício, J.
AU  - Fonseca, N. J. G.
AU  - Vaquero, Á. F. 
AU  - Arrebola, M.
AU  - Fernandes, C. A.
PY  - 2023
DO  - 10.1109/iWAT57058.2023.10171776
CY  - Aalborg, Denmark
UR  - https://ieeexplore.ieee.org/document/10171776
AB  - Transmit-arrays (T As) have been proposed as a cost-effective technology for designing beam antennas capable achieving wide-angle beam steering using only in-plane mechanical movements. As a spatially fed antenna, its performance is limited by the system focal distance. The design requires a rather complex trade-off angle between maximum scanning angle, minimum focal distance and minimum gain considering all beam pointing directions. The authors developed a new iterative method for optimizing the TA phase correction for extremely low focal distances (F/D<0.4). Herein, this general procedure is validated through a prototype comprised of an open waveguide, as a primary source, and a fully dielectric 3D- printed T A. The rectangular aperture dimensions are 195x145x16 mm and the focal source is placed at 50 mm (F/D~0.34). This antenna scans up to 50°, with a gain of 25 dBi at 30 GHz, 1.5 dB of scan loss, SLL< -10 dB and 1 dB-bandwidth of 6.7 % (29 to 31 GHz).
ER  -