一种新型十字交叉结构双频段天线设计-易迪拓培训.PDFVIP

一种新型十字交叉结构双频段天线设计 彭志艺 李秀萍 (北京邮电大学电子工程学院，泛网无线通信教育部重点实验室，北京 100876) 摘 要：本文介绍了一种应用于无线通信系统的十字交叉结构天线，该天线主要由十字交叉结构和接地板构 成，天线所占体积为 2 64 × 110mm 。加工的天线经矢量网络分析仪测量，其实测结果表明该天线在低频端 （820MHz-960MHz ）和高频端（1.7GHz-2.3GHz ），电压驻波比VSWR1.5 ，实测结果与仿真结果吻合良好。 此外，本文还进一步研究了天线各个关键尺寸参数对于天线带宽和匹配的影响分析。天线在低频和高频段增 益分别为1.15dBi 和6.8dBi ，满足无线通信系统要求。 关键词：双频段，十字交叉结构天线，无线通信 A Novel Crossed Shape Dual-band Antenna Design Peng zhiyi Li xiuping (School of Electronic Engineering, Key laboratory of Universal Wireless Communications, Ministry of Education ,Beijing University of Posts and Telecommunications, Beijing 100876,China) Abstract: A novel crossed shape dual-band antenna for wireless communication applications is proposed in this paper. The antenna consists of two crossed rectangular structure and ground plane. The volume of the antenna is 2 64 × 110mm . The measured results show that the antenna’s bandwidth is 140MHz (820-960MHz) and 600MHz (1.7-2.3GHz) at the lower and higher band respectively under the condition of voltage standing wave ratio (VSWR) less than 1.5. In addition, dimension parameters’ variation is studied to further investigate the effect to antenna performance . The antenna gain reaches 1.15 dBi and 6.8 dBi at the lower and higher frequency, respectively, which satisfies the requirement of wireless communication system. Key words: Dual-band; The Crossed antenna; Wireless communication 1 引言 种型式是铅垂 λ / 4 短桩带有直径约λ / 2 的圆片接 地面。该天线采用同轴传输线馈电，内导体接入λ / 4 [1] 短桩，而外导体端接于接地面 。虽然此类天线能根 随着电子技术的发展和蜂窝技术的不断完善，