An ultralight high-directivity ceramic composite lens antenna for 220–330 GHz
Kokkonen, Mikko; Ghavidel, Ali; Tervo, Nuutti; Nelo, Mikko; Myllymäki, Sami; Jantunen, Heli (2021-11-23)
M. Kokkonen, A. Ghavidel, N. Tervo, M. Nelo, S. Myllymäki and H. Jantunen, "An Ultralight High-Directivity Ceramic Composite Lens Antenna for 220–330 GHz," in IEEE Access, vol. 9, pp. 156592-156598, 2021, doi: 10.1109/ACCESS.2021.3130319.
This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe2021121060082
Tiivistelmä
Abstract
This work presents the characterization of Lithium molybdenum oxide (Li 2 MoO 4, LMO) hollow glass microspheres (HGMS) ceramic composite from 0.1 to 1 THz and an associated bullet shaped lens used with WR3.4 for 220‐330 GHz band. LMO-HGMS had permittivity of 1.18 and loss tangent of 0.003 at 300 GHz. The calculated reflectivity for the LMO-HGMS-air interface was 0.2 %. The fabricated bullet lens weighed 5 grams and was characterized using an experimental measurement system. The lens was measured to have a focus spot of diameter 1.5 mm. Simulated results showed the lens to operate with a WR3.4 waveguide having a gain of 27.5 dBi with a narrow beam width of 1-degree, 18 dB sidelobe level (SLL), 40% Fractional Beam Width (FBW), and −13 dB S 11 over the broadband 220‐330 GHz.
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