A helical folded dipole antenna for implantable communication devices
A helical folded dipole antenna for implantable communication devices
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DOI：
10.1109/aps.2010.5561748
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发表时间：
2010-07
期刊：
影响因子：
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通讯作者：
Hayato Mizuno;K. Ito;Masaharu Takahashi;K. Saito
中科院分区：
文献类型：
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作者：
Hayato Mizuno;K. Ito;Masaharu Takahashi;K. Saito
可植入设备作为通信工具已经被研究了很大的兴趣。这些植入式器械嵌入人体或动物体内。重要信息（例如，葡萄糖、血压和温度）可以通过无线通信链路从植入式设备传输到外部设备[1]- [3]。图1示出了用于病房中的人的应用之一。通过使用植入式设备，可以立即检测到患者的事件。然后，植入设备将警报无线发送到家用电器，家用电器经由安全网络链路连接到医院信息系统。医生收到警报，可以决定与患者进行复查。通常，植入式设备具有双向无线电，其可以与外部器具内携带的配对无线电通信。外部设备可以是家庭监护设备或便携式设备，如手机，为患者提供更大的移动性和短距离无线通信[4]。因此，植入式器械的天线是这些遥测系统中的关键部件。有几个问题要考虑在体内天线的设计，包括功耗，尺寸，频率，生物相容性等。本文提出了一种植入式螺旋折叠偶极子天线在2.45 GHz的短距离无线通信。此外，植入式器械应使用注射器嵌入人体。根据这一要求，所提出的天线具有直径为1 mm、长度为17.7 mm的圆柱形。利用时域有限差分法（FDTD）计算了天线的性能。
Implantable devices have been investigated with a great interest as communication tools. These implantable devices are embedded into the human or animal body. The vital information (e.g., glucose, blood pressure, and temperature) can be transmitted from implantable devices to the external equipments through wireless communication link [1]– [3]. Figure 1 shows a one of the application for a human in a sickroom. By using an implanted device, patient's events can be detected immediately. Then the implanted device sends the alert wirelessly to the home appliance which is connected to a hospital information system via a secured network link. A physician receives the alert and can decide to check back with the patient. In general, the implantable devices is have a bidirectional radio that can communicate with a paired radio carried within an external appliance. The external appliance could be a home monitoring device or a portable equipment, such as a cell phone, that provides the patient with increased mobility and a short-range wireless communication [4]. Therefore, the antenna for implanted devices is a key components in these telemetry systems. There are several issues to be considered in the design of an in-body antenna, including power consumption, size, frequency, biocompatibility, etc. This paper proposes an implanted helical folded dipole antenna for a short-range wireless communication at 2.45 GHz. Moreover, the implantable device is supposed to be embedded into human body using a syringe. According to this demand, the proposed antenna has a circular cylindrical shape of 1-mm diameter and 17.7-mm length. The antenna performances were investigated by use of the finite-difference timedomain (FDTD) calculation.