Low permittivity cordierite-based microwave dielectric ceramics for 5G/6G telecommunications

Abstract

5G and forthcoming 6G communication systems require dielectric ceramics with low relative permittivity (εr) and near-zero temperature coefficient of resonant frequency (τf) for the lower part of the microwave (MW) band and at sub-Terahertz. Mg2Al4Si5O18 (MAS) ceramics are promising candidates due to their low εr (~ 6) and high-quality factor (Q×f > 40,000 GHz) but have a large τf. In this study, 5.5 wt% TiO2 (MAS-T5.5) was used to adjust τf of MAS to −2.8 ppm/℃ whilst retaining low εr (5.24) and good Q×f (33,400 GHz), properties consistent with those obtained by infrared reflectance. A demonstrator microstrip patch antenna with gain 4.92 dBi and 76.3% efficiency was fabricated from MAS-T5.5.

Metadata

Authors/Creators:

Lou, W.
Mao, M.
Song, K.
Xu, K.
Liu, B.
Li, W.
Yang, B.
Qi, Z.
Zhao, J.
Sun, S.
Lin, H.
Hu, Y.
Zhou, D.
Wang, D.
Reaney, I.M. https://orcid.org/0000-0003-3893-6544

© 2022 Elsevier Ltd. This is an author produced version of a paper subsequently published in Journal of the European Ceramic Society. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Keywords:

Cordierite; Low permittivity; Terahertz; Patch antenna

Dates: