摘要
选择了CC2420芯片作为传感器节点的射频通信与处理模块。根据CC2420射频I/O端口的特点与要求,选择的天线是印制折合偶极天线,并采用共面带状线对其馈电。通过仿真找到天线的谐振阻抗与谐振长度,谐振阻抗高于一般共面带状线的特性阻抗,因此对天线进行改进以适当降低其谐振阻抗,同时对基本匹配电路进行改进。对改进后的天线、馈线及阻抗匹配电路的正确性及性能进行了仿真与验证。
The CC2420 is chosen as the RF processing and communicating unit of sensor-node.According to the characteristics of CC2420＇s RF I/O ports,a PFDA（Printed Folded-Dipole-Antenna） is used.The antenna is fed by a couple of CPS（Coplanar Stfip）.After a series of simulations,the antenna＇s resonance impedance and length are acquired.The resonance impedance is higher than that of an ordinal＇ CPS,so it is necessary to amend the antenna in order to reduce its resonance properly.The basic impedance-matching circuit has to be amended as well.The performance and correctness of the amended antenna,feeding line, and impedance-matching circuit are simulated and proved.
出处
《计算机工程与应用》
CSCD
北大核心
2009年第32期65-68,共4页
Computer Engineering and Applications
关键词
传感器节点
印制折合偶极天线
共面带状线
谐振阻抗
阻抗匹配
天线性能
sensor-node
Printed Folded-Dipole-Antenna （ PFDA ）
Coplanar Strip （ CPS ）
resonance impedance
impedance match
performance of antenna
