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Matos, S., Felício, J. M., Costa, J. R., Fernandes, C. A. & Fonseca, N. J. G. (2024). Multibeam antenna for wide-angle 96-beam coverage at Ka-band using a multifocal transmit-array. In 2024 18th European Conference on Antennas and Propagation (EuCAP). Glasgow, United Kingdom: IEEE.

S. D. Matos et al.,  "Multibeam antenna for wide-angle 96-beam coverage at Ka-band using a multifocal transmit-array", in 2024 18th European Conf. on Antennas and Propagation (EuCAP), Glasgow, United Kingdom, IEEE, 2024

@inproceedings{matos2024_1782670330084,
	author = "Matos, S. and Felício, J. M. and Costa, J. R. and Fernandes, C. A. and Fonseca, N. J. G.",
	title = "Multibeam antenna for wide-angle 96-beam coverage at Ka-band using a multifocal transmit-array",
	booktitle = "2024 18th European Conference on Antennas and Propagation (EuCAP)",
	year = "2024",
	editor = "",
	volume = "",
	number = "",
	series = "",
	doi = "10.23919/EuCAP60739.2024.10501556",
	publisher = "IEEE",
	address = "Glasgow, United Kingdom",
	organization = "",
	url = "https://ieeexplore.ieee.org/document/10501556"
}

TY  - CPAPER
TI  - Multibeam antenna for wide-angle 96-beam coverage at Ka-band using a multifocal transmit-array
T2  - 2024 18th European Conference on Antennas and Propagation (EuCAP)
AU  - Matos, S.
AU  - Felício, J. M.
AU  - Costa, J. R.
AU  - Fernandes, C. A.
AU  - Fonseca, N. J. G.
PY  - 2024
DO  - 10.23919/EuCAP60739.2024.10501556
CY  - Glasgow, United Kingdom
UR  - https://ieeexplore.ieee.org/document/10501556
AB  - ost-effective multibeam millimeter wave antenna solutions are required to enable the deployment of 5G and beyond systems operating in the frequency range 2 (FR2). The tradeoff between system complexity and RF requirements (such as high gain, number of beams, beam forming/scanning capability, etc.) is a challenging problem fomenting the development of new antennas. Spatially fed transmit-arrays (TAs) where the aperture is illuminated by a planar array placed in a focal plane, is a canonical solution. However, the design is constrained by the focal distance to aperture diameter ratio (F/D). On the one hand, reducing the F/D allows designing more compact feeding array elements, on the other hand, it limits the maximum angle coverage due to scanning aberrations. In this work, we show that a TA optimized for operating simultaneously with low F/D and wide-angle coverage can improve the performance of this classical configuration. We design a Ka-band multibeam antenna with a TA fed by a 19x5 array of standard WR38 waveguide operating with F/D=0.34. It provides 25 dBi of gain with scan losses below 3 dB when scanning in a zenith plane up to -55 degrees, covering 80 degrees (−55 to 25 degrees) with cross-over levels around 3 dB.
ER  -