一种应用于ISM频段的共面波导型可植入式天线

A CPW-fed implantable antenna operating at ISM band

摘要:

为了满足目前可植入式医疗设备对天线小型、宽带、频率性能稳定的需求，提出一种新型医疗频段(ISM)可植入式天线，天线具有阶梯形状的对称结构，共面波导馈电。采用立方体形状的人体模型填充肌肉，天线置于人体中心部位，仿真设计天线覆盖医疗频段(ISM)，分析了天线处于胃、小肠、皮肤等组织材料中仍能够覆盖ISM频段。在配制的模拟人体肌肉溶液中对天线进行测试，带宽为2.02~2.5 GHz。天线尺寸4 mm×11.9 mm×0.8 mm，采用FR-4材料，与目前已有的可植入式天线相比，天线具有体积小、带宽宽、制作成本低等优点，可应用于心脏起搏器、胶囊内镜等可植入式医疗设备。

Abstract:

An implantable antenna is required with miniaturization and stable frequency performance when working inside human body. A novel implantable antenna is proposed, which has a step shaped symmetrical structure fed by Coplanar Waveguide(CPW). A cube shaped human body model filled with muscle phantom is utilized in simulation with the antenna in the center of body. The antenna still covers Industrial Scientific Medical (ISM) band. The simulation results show that the antenna still covers ISM band when it is planted in different human tissues. The proposed antenna is measured in the human muscle solution and the measured bandwidth is 2.02-2.5 GHz. The size of the proposed antenna is 4 mm×11.9 mm×0.8 mm with FR-4 as substrate. Compared with the published implantable antenna, the proposed antenna has the advantages of small volume, wide bandwidth, and low production cost, etc. The proposed antenna can be applied in implantable medical equipments such as pacemaker, capsule endoscope, etc.