Near-Zero Thermal Expansion Ba1-xSrxZn2Si2O7-Based Microwave Dielectric Ceramics for 3D Printed Dielectric Resonator Antenna with Integrative Lens

被引：33

作者：

Zou, Zheng-Yu ^{[1
,2
]}

Lou, Yi-Hui ^{[1
,2
]}

Song, Xiao-Qiang ^{[1
,2
]}

Jiang, Hai ^{[3
]}

Du, Kang ^{[1
,2
]}

Yin, Chang-Zhi ^{[1
,2
]}

Lu, Wen-Zhong ^{[1
,2
,4
]}

Wang, Xiao-Chuan ^{[1
,2
]}

Wang, Xiao-Hong ^{[1
,2
]}

Fu, Ming ^{[1
,2
]}

Lei, Wen ^{[1
,2
,4
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Key Lab Funct Mat Elect Informat B MOE, Wuhan 430074, Hubei, Peoples R China

[2] Huazhong Univ Sci & Technol, WZ AMI, Wenzhou 325035, Zhejiang, Peoples R China

[3] Ningbo Univ, Dept Microelect Sci & Engn, Ningbo 315211, Zhejiang, Peoples R China

[4] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China

来源：

ADVANCED MATERIALS INTERFACES | 2021年 / 8卷 / 15期

基金：

中国国家自然科学基金;

关键词：

3D printing; coefficient of thermal expansion; dielectric resonator antennas; electroceramics; silicates; SINTERING TEMPERATURE; STRUCTURAL EVOLUTION; LATTICE ENERGY; BOND IONICITY; BA2ZNSI2O7; RATIO; CA;

D O I：

10.1002/admi.202100584

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

High-gain, low-weight, wide bandwidth, and miniaturized lens antennas with stable properties against temperature are intensely required in extreme environments such as aerospace field. However, high-performance microwave dielectric ceramics with near-zero thermal expansion and frequency shift with temperature are very rare; moreover, the requirement of 3D printing processes also restricts their developments. Ba0.4Sr0.6Zn2Si2O7 with negative coefficient of thermal expansion (CTE), which originates from the stretched [ZnO4] tetrahedral chain to the twisted one along b-axis with temperature, and CaTiO3 with positive temperature coefficient of resonant frequency (tau(f)) can effectively adjust both CTE and tau(f) of Zn1.8SiO3.8 to near-zero value in 0.95(0.9Zn(1.8)SiO(3.8)-0.1Ba(0.4)Sr(0.6)Zn(2)Si(2)O(7))-0.05CaTiO(3) ceramic. Then, a Ku-band Luneburg lens integrative antenna fabricated by stereolithography 3D printing technology exhibits an average gain of 8.06 dBi at 10.45-11.39 GHz and 10.3 dBi at 12.27-13.45 GHz, which has potential applications in temperature-stable satellite communication.

引用

页数：10

共 52 条

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