Eliminate Crosstalk Using Symmetry in MIMO Arrays of Inductive Antennas: an Introduction to Pie-Chart Antennas

Q3 Engineering
J. Douarville-Blaise, D. Pouhè, Jun Hirai
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引用次数: 1

Abstract

We present a topology of MIMO arrays of inductive antennas exhibiting inherent high crosstalk cancellation capabilities. A single layer PCB is etched into a 3-channels array of emitting/receiving antennas. Once coupled with another similar 3-channels emitter/receiver, we measured an Adjacent Channel Rejection Ratio (ACRR) as high as 70 dB from 150 Hz to 150 kHz. Another primitive device made out of copper wires wound around PVC tubes to form a 2-channels “non-contact slip-ring” exhibited 22 dB to 47 dB of ACRR up to 15MHz. In this paper we introduce the underlying theoretical model behind the crosstalk suppression capabilities of those so-called “Pie-Chart antennas”: an extension of the mutual inductance compensation method to higher number of channels using symmetries. We detail the simple iterative building process of those antennas, illustrate it with numerical analysis and evaluate there effectiveness via real experiments on the 3-channels PCB array and the 2-channels rotary array up to the limit of our test setup. The Pie Chart design is primarily intended as an alternative solution to costly electronic filters or cumbersome EM shields in wireless AND wired applications, but not exclusively.
利用对称性消除感应天线MIMO阵列中的串扰:饼图天线简介
我们提出了一种表现出固有的高串扰消除能力的电感天线的MIMO阵列的拓扑结构。单层PCB被蚀刻成发射/接收天线的3通道阵列。一旦与另一个类似的3通道发射器/接收器耦合,我们测量到从150 Hz到150 kHz的相邻通道抑制比(ACRR)高达70 dB。另一种由铜线缠绕在PVC管上形成2通道“非接触滑环”的原始设备在15MHz的ACRR范围内表现出22dB至47dB的ACRR。在本文中,我们介绍了那些所谓的“饼图天线”的串扰抑制能力背后的基本理论模型:将互感补偿方法扩展到使用对称性的更多信道。我们详细介绍了这些天线的简单迭代构建过程,用数值分析进行了说明,并通过在3通道PCB阵列和2通道旋转阵列上的实际实验评估了其有效性,直到我们的测试设置的极限。饼图设计主要是作为无线和有线应用中昂贵的电子滤波器或笨重的EM屏蔽的替代解决方案,但并非唯一。
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来源期刊
Progress In Electromagnetics Research B
Progress In Electromagnetics Research B Engineering-Electrical and Electronic Engineering
CiteScore
2.70
自引率
0.00%
发文量
14
期刊介绍: Progress In Electromagnetics Research (PIER) B publishes peer-reviewed original, comprehensive and tutorial review articles on all aspects of electromagnetic theory and applications. It is a new journal in 2008, and freely available to all readers via the Internet. Manuscripts submitted to PIER B must not have been submitted simultaneously to other journals. Authors are solely responsible for the factual accuracy of their articles, and all articles are understood to have received clearance(s) for publication.
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