中国物理B ›› 2015, Vol. 24 ›› Issue (12): 127704-127704.doi: 10.1088/1674-1056/24/12/127704
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
杜洪磊a, 薛倩a, 高小洋a, 姚凤蕊a, 卢世阳a, 汪业龙b, 刘春恒c, 张永成a, 吕跃广b, 李山东a d
Du Hong-Lei (杜洪磊)a, Xue Qian (薛倩)a, Gao Xiao-Yang (高小洋)a, Yao Feng-Rui (姚凤蕊)a, Lu Shi-Yang (卢世阳)a, Wang Ye-Long (汪业龙)b, Liu Chun-Heng (刘春恒)c, Zhang Yong-Cheng (张永成)a, Lü Yue-Guang (吕跃广)b, Li Shan-Dong (李山东)a d
摘要: A composite ceramic with nominal composition of 45.0 wt%(Ba0.5Sr0.5)TiO3-55.0 wt%MgO (acronym is BST-MgO) is sintered for fabricating a frequency reconfigurable aperture-coupled microstrip antenna. The calcined BST-MgO composite ceramic exhibits good microwave dielectric properties at X-band with appropriate dielectric constant εr around 85, lower dielectric loss \tanδ about 0.01, and higher permittivity tunability 14.8% at 8.33 kV/cm. An ultrahigh E-field tunability of working frequency up to 11.0% (i.e., from 9.1 GHz to 10.1 GHz with a large frequency shift of 1000 MHz) at a DC bias field from 0 to 8.33 kV/cm and a considerably large center gain over 7.5 dB are obtained in the designed frequency reconfigurable microstrip antenna. These results demonstrate that BST materials are promising for the frequency reconfigurable antenna.
中图分类号: (Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)