circular polarization;
slot ring antenna;
dual-band antenna;
D O I:
10.1002/mop.25928
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
An L-shaped slot loaded inside a C-shaped slot is used to realize a dual-band antenna fed by a microstrip line. Two circularly polarized waves are generated at the 1.57 and the 2.45 GHz band. The width in the C-slot is uniform, whereas the width in the L-slot is nonuniform. In the L-slot, the width in the vertical part is made wider than that in the horizontal part. We found that the width in the vertical part of the L-slot is an efficient tuning parameter. The antenna can achieve about 6% axial ratio bandwidth at both bands. (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1041-1044, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25928