A Comparison of Two and Three Dimensional Dipole Antennas for an Implantable Retinal Prosthesis
A Comparison of Two and Three Dimensional Dipole Antennas for an Implantable Retinal Prosthesis
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DOI：
10.1109/tap.2008.916889
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发表时间：
2008-03
影响因子：
5.7
通讯作者：
Shruthi Soora;K. Gosalia;M. Humayun;Gianluca Lazzi
中科院分区：
文献类型：
--
作者：
Shruthi Soora;K. Gosalia;M. Humayun;Gianluca Lazzi
研究了在双单元视网膜假体中使用三维折叠偶极天线作为数据遥测植入式接收天线以恢复盲人部分视力的可行性。探索三维设计以努力增强某些天线特性，例如带宽和最大增益，同时与其二维等效物相比减小平面覆盖区尺寸。通过折叠和旋转偶极臂来检查三维层之间的电流矢量对准，以充分优化天线的特性。在模拟中比较了2D和3D天线的性能，并通过制造和表征在空气和眼模型内的发射/接收系统中的性能来进一步检查。结果表明，三维天线可以提供更大的带宽，同时在物理上小于相应的二维天线，从而提供更大的信道容量，这可能导致系统具有更多的刺激电极。
The feasibility is investigated using three dimensional folded dipole antennas as a data-telemetry implantable receiving antenna in a dual-unit retinal prosthesis to restore partial vision to the blind. Three dimensional designs are explored in an effort to enhance certain antenna characteristics such as bandwidth and maximum gain while reducing the planar footprint size in comparison to its two dimensional equivalent. The current vector alignment between the three dimensional layers are examined through folding and rotating the dipole arms with respect to each other to fully optimize the antenna's characteristics. The performance of the 2D and 3D antennas were compared in simulations and further examined by fabricating and characterizing the performance in a transmit/ receive system in air and inside eye phantoms. Results show that three-dimensional antennas can provide larger bandwidth while being physically smaller than the correspondent two-dimensional ones, thus providing larger channel capacity that could lead to a system with an increased number of stimulating electrodes.