UltrahighQ Sr1+xY2O4+x (x = 0–0.04) microwave dielectric ceramics for temperature-stable millimeter-wave dielectric resonator antennas

Guoqiang He; Yu Jiang; Kaixin Song; Yanjun Liu; Yuan Nie; Wenjie Zhang; Ziqi Zhao; Yinghan He; Xinyue Ma; Xiuli Chen; Xu Li; Huanfu Zhou

doi:10.26599/JAC.2024.9220828

Journal of Advanced Ceramics 2024, 13(2): 155-165 https://doi.org/10.26599/JAC.2024.9220828

Research Article |

Open Access | Issue | Published: 08 March 2024

UltrahighQ Sr_1+xY₂O_4+x (x = 0–0.04) microwave dielectric ceramics for temperature-stable millimeter-wave dielectric resonator antennas

Show Author's Information Hide Author's Information Guoqiang He^¹, Yu Jiang^², Kaixin Song^²(

), Yanjun Liu^¹, Yuan Nie^¹, Wenjie Zhang^¹, Ziqi Zhao^¹, Yinghan He^¹, Xinyue Ma^¹, Xiuli Chen^¹, Xu Li^¹(

), Huanfu Zhou^¹(

)

1Collaborative Innovation Centre for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China

2College of Electronic Information, Hangzhou Dianzi University, Hangzhou 310018, China

Keywords:

microwave dielectric ceramics, millimeter wave, dielectric resonator antenna, nonstoichiometric ratio

Cite this article:

He G, Jiang Y, Song K, et al. UltrahighQ Sr_1+xY₂O_4+x (x = 0–0.04) microwave dielectric ceramics for temperature-stable millimeter-wave dielectric resonator antennas. Journal of Advanced Ceramics, 2024, 13(2): 155-165. https://doi.org/10.26599/JAC.2024.9220828

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Abstract Full text About this article

Abstract

Microwave dielectric ceramics should be improved to advance mobile communication technologies further. In this study, we prepared Sr_1+xY₂O_4+x (x = 0–0.04) ceramics with nonstoichiometric Sr²⁺ ratios based on our previously reported SrY₂O₄ microwave dielectric ceramic, which has a low dielectric constant and an ultrahigh quality factor (Q value). The ceramic exhibited a 33.6% higher Q-by-frequency (Q×f) value (Q ≈ 12,500) at x = 0.02 than SrY₂O₄. All Sr_1+xY₂O_4+x (x = 0–0.04) ceramics exhibited pure phase structures, although variations in crystal-plane spacings were observed. The ceramics are mainly composed of Sr–O, Y1–O, and Y2–O octahedra, with the temperature coefficient of the resonant frequency (τ_f) of the ceramic increasing with Y2–O octahedral distortion. The ceramic comprises uniform grains with a homogeneous elemental distribution, clear grain boundaries, and no obvious cavities at x = 0.02. The Sr_1+xY₂O_4+x (x = 0–0.04) ceramics exhibited good microwave dielectric properties, with optimal performance observed at x = 0.02 (dielectric constant (ε_r) = 15.41, Q×f = 112,375 GHz, and τ_f = −17.44 ppm/℃). The τ_f value was reduced to meet the temperature-stability requirements of 5G/6G communication systems by adding CaTiO₃, with Sr_1.02Y₂O_4.02+2wt%CaTiO₃ exhibiting ε_r = 16.14, Q×f = 51,004 GHz, and τ_f = 0 ppm/℃. A dielectric resonator antenna prepared using Sr_1.02Y₂O_4.02+2wt%CaTiO₃ exhibited a central frequency of 26.6 GHz, with a corresponding gain and efficiency of 3.66 dBi and 83.14%, respectively. Consequently, Sr_1.02Y₂O_4.02-based dielectric resonator antennas are suitable for use in 5G millimeter-wave band (24.5–27.5 GHz) applications.

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UltrahighQ Sr_1+xY₂O_4+x (x = 0–0.04) microwave dielectric ceramics for temperature-stable millimeter-wave dielectric resonator antennas

Show Author's information Hide Author's Information Guoqiang He^¹, Yu Jiang^², Kaixin Song^²(

), Yanjun Liu^¹, Yuan Nie^¹, Wenjie Zhang^¹, Ziqi Zhao^¹, Yinghan He^¹, Xinyue Ma^¹, Xiuli Chen^¹, Xu Li^¹(

), Huanfu Zhou^¹(

)

2College of Electronic Information, Hangzhou Dianzi University, Hangzhou 310018, China

Abstract

Keywords: microwave dielectric ceramics, millimeter wave, dielectric resonator antenna, nonstoichiometric ratio

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Publication history

Received: 30 August 2023

Revised: 25 October 2023

Accepted: 17 November 2023

Published: 08 March 2024

Issue date: February 2024

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (Nos. 61761015 and 11664008), the Natural Science Foundation of Guangxi (No. 2018GXNSFFA050001), and the High Level Innovation Team and Outstanding Scholar Program of Guangxi Institutes.

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This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/).