摘要
为了满足电子不停车收费系统射频识别（RFID）读写器天线的要求，设计了一款5．8GHz圆极化高增益读写器天线。天线采用同轴线馈电方式，利用方形切角使天线圆极化、使用较大反射面提高天线增益。通过仿真和优化，天线回波损耗（〈-10dB）工作带宽达到620MHz（5．55～6．17GHz），轴比（〈3dB）带宽达到140M№（5．71～5．85GHz），最大增益可达8．4dB。实际测试结果表明天线在5．8GHz附近具有良好的谐振特性，能够满足ETC使用需要，具有实际应用价值。
In order to meet highway electronic toll collection （ETC） radio frequency identification （RFID） reader an- tenna requirements, a novel reader antenna is designed in this paper, which has high gain and circularly polarized at 5.8GHz. The antenna is feed by a coaxial, which uses square-shaped chamfer to make the antenna circular polarized and larger reflective surface to improve the antenna gain. Through simulation and optimization, The antenna＇s return loss is less than - 10dB and the bandwidth reaches to 620MHz （5.55 -6.17GHz）, the axial ratio（〈3dB） band-width is 570MHz （5.71 - 5.85GHz）, and the maximum of gain reaches to 8.4dB. The measurement results show that the antenna has good resonance characteristics at 5.8GHz, which meet ETC market demand and have a good practical value.
出处
《成都信息工程学院学报》
2013年第2期139-143,共5页
Journal of Chengdu University of Information Technology
基金
国家自然科学基金资助项目(61201095)
成都信息工程学院科研项目与科研人才基金(KYTZ201211
CKF201103
J201202)资助
