Development of Novel 3-D Cube Antennas for Compact Wireless Sensor Nodes
Development of Novel 3-D Cube Antennas for Compact Wireless Sensor Nodes
复制标题
开发用于紧凑型无线传感器节点的新型 3D 立方体天线
DOI：
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发表时间：
2012
影响因子：
5.7
通讯作者：
T. Weller
中科院分区：
文献类型：
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作者：
I. Nassar;T. Weller
本文描述了用于窄带无线传感器节点应用的三维天线。天线被设计在一个立方体的表面上，这使得立方体内部可以放置传感器电子器件。每个天线的布局包括在立方体的两侧制造的偶极子，并连接到第三侧的平衡-不平衡线过渡。立方体的底部作为微带馈线的接地面。第一个立方体天线的设计工作频率为2.4 GHz，其10db回波损耗带宽为2%。该设计的Ka为0.55，测量增益为1.69 dBi，测量辐射效率为78%。第二个立方体天线与第一个相似，但它装载了高介电常数的上覆层。第二种天线的Ka为0.45，测量增益为1.25 dBi，测量辐射效率为73%，带宽为1.5%。这种设计与公开文献中描述的高效率、电小天线相比效果很好。采用惠勒帽测量效率，采用三天线法测量增益。
3-D antennas for narrow band, wireless sensor node applications are described herein. The antennas were designed on the surface of a cube which makes available the cube interior for sensor electronics placement. The layout of each antenna consists of a dipole fabricated on two sides of the cube and connected to a balanced-to-unbalanced line transition on the third side. The base of the cube serves as a ground plane for the microstrip feed line. The first cube antenna was designed for an operating frequency of 2.4 GHz and its 10 dB return loss bandwidth is 2%. Ka of the proposed design is 0.55 and its measured gain is 1.69 dBi with 78% measured radiation efficiency. The second cube antenna is similar to the first one but it was loaded with high dielectric constant superstrates. Ka of the second proposed antenna is 0.45, its measured gain is 1.25 dBi with 73% measured radiation efficiency and the bandwidth is 1.5%. The designs compare well with high efficiency, electrically small antennas that have been described in the open literature. A Wheeler Cap was used to measure the efficiency and the 3-antenna method was used for measuring the gain.