Haas Michael, Schweizer Benedikt, Anders Jens, Ortmanns Maurits
Annu Int Conf IEEE Eng Med Biol Soc. 2017 Jul;2017:1086-1089. doi: 10.1109/EMBC.2017.8037016.
This paper presents a miniaturized impulse radio ultra-wideband (IR-UWB) antenna which is designed for transcutaneous, short-distance data communication used in multichannel neural recording. In these systems, with the increasing number of recording channels, data rates of 10-100 Mbit/s must be transmitted with very limited power and area. Therefore, the antennas are designed as planar, ellipsoidal dipoles on a high permittivity substrate with ε = 10.2 to achieve high radiation efficiency with small physical size. In order to increase the robustness against misalignment, a circularly polarized antenna is used at the external receiver unit, reducing the signal power variation under angular misalignment. For the transmitting antenna a miniaturized prototype with an integrated pulse generator was designed on a round shaped PCB with a diameter of only 14mm. Measurements through porcine skin in the frequency domain show an attenuation of less than 30dB in the intended frequency band between 6 and 8.5GHz. Additional evaluations in the time domain prove possible pulse repetition rates of up to 100MHz at a transmission distance of 1.5cm.
本文介绍了一种小型化脉冲无线电超宽带（IR-UWB）天线，该天线专为多通道神经记录中使用的经皮短距离数据通信而设计。在这些系统中，随着记录通道数量的增加，必须在非常有限的功率和面积下传输10-100Mbit/s的数据速率。因此，天线被设计为在介电常数ε = 10.2的高介电常数基板上的平面椭圆形偶极子，以在小物理尺寸下实现高辐射效率。为了提高抗失准的鲁棒性，在外部接收器单元使用了圆极化天线，减少了角度失准下的信号功率变化。对于发射天线，在直径仅为14mm的圆形印刷电路板上设计了一个带有集成脉冲发生器的小型化原型。在频域中通过猪皮进行的测量表明，在6至8.5GHz的预期频带内衰减小于30dB。在时域中的额外评估证明，在1.5cm的传输距离下，脉冲重复率可达100MHz。
