摘要
设计了一款新型的具有谐波抑制能力的圆极化整流天线。在圆环缝隙天线的中心挖圆形孔,控制天线的谐振频带与抑制高次谐波。在缝隙的内边缘开两个半圆形槽,缩减天线的尺寸并获得圆极化辐射。倍压整流电路有效地提高了整流天线的输出直流电压。仿真结构表明,天线谐振带宽(VSWR<2)为17.6%,圆极化带宽(AR<3 d B)达到3.7%。整流电路在0 d Bm的输入功率时,能达到59%的整流效率和1.7 V的直流输出电压。该整流天线可作为无源射频识别(Radio Frequency Identification,RFID)标签的整流天线。
A novel circular polarization rectifying antenna （rectenna） with harmonic suppression is presented and designed in this paper. To control the resonant frequency band and suppress high-order harmonics, a round hole is dug in the center of the ring-slot antenna. Two semicircular grooves are opened on the inner edge of the slot to reduce the antenna size and create circularly polarization. The voltage-doubler rectifier circuit effectively improves output DC voltage of the rectenna. Simulation results show that the resonant bandwidth （VSWR〈2） of the antenna is 17.6% and circularly polarized bandwidth （AR〈3dB） up to 3.7%. The rectifying efficiency can reach 59% and DC output voltage 1.7V when the rectifier circuit has 0dBm input power. The rectenna can be used as the rectifying antenna of passive radio frequency identification （RFID） tag.
出处
《通信技术》
2015年第9期1092-1095,共4页
Communications Technology
关键词
整流天线
谐波抑制
圆极化
倍压整流电路
rectenna
harmonic suppression
circular polarization
voltage-doubler rectifier circuit
