Enhanced Na+-substituted Li2Mg2Mo3O12 ceramic substrate based on ultra-low temperature co-fired ceramic technology for microwave and terahertz polarization-selective functions |
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| Affiliation: | 1. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China;2. Information Materials and Device Applications Key Laboratory of Sichuan Provincial Universities, Chengdu University of Information Technology, Chengdu 610225, China;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, PR China;2. Stake Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, PR China;1. Univ. Limoges, IRCER, UMR CNRS 7315, F-87068 Limoges, France;2. CILAS, F-45063 Orléans, France;1. CEITEC – Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200 Brno, the Czech Republic;2. FZU – Institute of Physics of the Czech Academy of Sciences, Na Slovance, 18221 Prague, Czech Republic;3. Institute of Material Science and Engineering, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2, 61669 Brno, the Czech Republic |
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| Abstract: | ![]()
A novel Li2Mg2-xNa2xMo3O12 (x = 0.09) ceramic with ultra-low sintering temperature is prepared by the solid-state reaction method. This ceramic (625 °C) exhibits excellent microwave dielectric properties (εr = 7.9, Q×f = 43844 GHz, τf = ?48.3 ppm/°C), terahertz transmission properties (εr1 = 7.4, tan σ1 = 0.0158, Tcoefficient = 0.598), and chemical compatibility with Ag. For the first time, two polarization selective devices are designed in the microwave and terahertz regions by using this ceramic substrate, respectively. The transmission amplitudes of the right- and left-handed circularly polarized waves of the microwave device at 9.7 GHz are 0.895 and 0.019, respectively. The transmission coefficients of the y- and x-polarized waves of the terahertz device at 0.45 THz are 0.598 and 0.075, respectively. Both functions are verified by the overall far-field radiation pattern. This work promotes the application of dielectric ceramics and ULTCC technology in the microwave and terahertz regions. |
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| Keywords: | Microwave dielectric properties Terahertz transmission properties ULTCC Polarization-selective |
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