University of Oulu

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.

An ultralight high-directivity ceramic composite lens antenna for 220–330 GHz

Saved in:
Author: Kokkonen, Mikko1; Ghavidel, Ali1; Tervo, Nuutti2;
Organizations: 1Microelectronics Research Unit, University of Oulu, 90014 Oulu, Finland
2Centre for Wireless Communications, University of Oulu, 90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.9 MB)
Persistent link:
Language: English
Published: Institute of Electrical and Electronics Engineers, 2021
Publish Date: 2021-12-10


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.

see all

Series: IEEE access
ISSN: 2169-3536
ISSN-E: 2169-3536
ISSN-L: 2169-3536
Volume: 9
Pages: 156592 - 156598
DOI: 10.1109/ACCESS.2021.3130319
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported by the Academy of Finland 6Genesis Flagship under Grant 318927.
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
Copyright information: This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see