کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11007786 1840506 2019 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High thermal stability OF Li2TiO3-Al2O3 composite in the microwave C-Band
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
High thermal stability OF Li2TiO3-Al2O3 composite in the microwave C-Band
چکیده انگلیسی
In this study, we analyzed composites based on Li2TiO3-Al2O3 in the microwave range by measuring their dielectric properties comprising the temperature coefficient of the resonant frequency (τf), relative dielectric permittivity (εr), and dielectric loss (tanδ) in the C band (4-8 GHz). The Li2TiO3 phase was obtained by solid-state reaction and the ceramic composites were obtained by blending phase 2 with 5, 10, 15 and 20 wt% of Al2O3. We then analyzed these ceramic composites as dielectric resonator antenna. The results showed that the alumina addition of 5 wt% improved the τf value for the composites (τf = −0.58 ppm °C−1) but the other dielectric properties did not improve with the alumina concentration, where the permittivity decreased and the dielectric loss increased. According to the antenna measurements, all of the samples exhibited good performance in terms of the gain (3.91-5.67 dBi), bandwidth (338-500 MHz), and efficiency (70.58-96.84%) compared with previous findings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 125, February 2019, Pages 51-56
نویسندگان
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