小尺寸多层平面式螺旋天线的仿真设计

本文介绍了一种小尺寸多层平面式螺旋天线，通过近场耦合实现在频率范围10～300MHz之间的短距离数据通信。这种平面式结构采用PCB工艺，通过圆形螺旋绕组，由过孔连通每层线圈，并将不同螺旋圈数、不同层间距、收发天线之间不同距离等对天线特性的影响进行仿真研究。仿真结果表明，随着天线圈数的增加，天线的谐振频率减小，电场减弱，而磁场增强。

Design of a Small Size Multilayer Printed Spiral Winding Antenna

This paper introduced a small size multi-layer planar spiral antenna which could accomplish short-distance data communication via near-field coupling from 10 to 300 MHz. The PCB technique was used and the circular spiral winding was taken. The coil on each layer was connected via through-hole. The influence of different turns, layer space as well as distance between the transmitting and receiving antennas on antenna characteristics has also been simulated and discussed. The results show that the resonant fre- quency of the antenna decreases with turns number, and the electric field is weakened while the magnetic field is enhanced.