Circularly Polarized Miniaturized Implantable Antenna for Leadless Pacemaker Devices
Circularly Polarized Miniaturized Implantable Antenna for Leadless Pacemaker Devices
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DOI：
10.1109/tap.2022.3161370
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发表时间：
2022-08-01
影响因子：
5.7
通讯作者：
Segovia-Vargas, Daniel
中科院分区：
文献类型：
--
作者：
Lamkaddem, Abdenasser;El Yousfi, Ahmed;Segovia-Vargas, Daniel
本文研制了一种工作在915 MHz工业、科学和医疗（ISM）频段的紧凑型圆极化（CP）植入式天线。所提出的辐射器是基于一个完全平面和低剖面贴片天线与接地平面和不同的插槽，但没有任何通孔，这使得该结构的植入式设备的一个很好的候选人。通过引入环绕的非对称U形结构来实现圆偏振。在U形结构的内部包括曲折线，以增加天线的电长度而不增加其机械尺寸。在810 ~ 980 MHz范围内，阻抗带宽为18.9%，在850 ~ 1010 MHz范围内，轴比为17.2%。所提出的天线具有5.2 x 5.6 x 0.25 mm（3）的紧凑尺寸，这似乎是最近报告的植入式天线中最小的天线。此外，所提出的天线实现了-23dBi的相对高的增益值。
A compact circularly polarized (CP) implantable antenna working at 915 MHz, at the industrial, scientific, and medical (ISM) band, is developed in this article. The proposed radiator is based on a fully planar and low-profile patch antenna with a ground plane and different slots but without any via holes, which makes the structure a good candidate for implantable devices. The circular polarization is achieved by means of introducing a surrounding and asymmetrical U-shaped structure. A meander line has been included in the inside of the U-shaped structure to increase the electrical length of the antenna without increasing its mechanical dimensions. An impedance bandwidth of 18.9% from 810 to 980 MHz and an axial ratio of 17.2% from 850 to 1010 MHz have been achieved. The proposed antenna has a compact size of 5.2 x 5.6 x 0.25 mm(3), which seems to be the smallest antenna over the recently reported implantable antennas. In addition, the proposed antenna achieves a relatively high gain value of -23 dBi.