A Stochastic Approach to Design MIMO Antenna with Parasitic Elements Based on Propagation Characteristics
A Stochastic Approach to Design MIMO Antenna with Parasitic Elements Based on Propagation Characteristics
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基于传播特性的带寄生元件的MIMO天线设计的随机方法
DOI：
10.1587/transcom.e93.b.2578
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
M. Mizoguchi
中科院分区：
文献类型：
--
作者：
N. Honma;K. Nishimori;R. Kudo;Y. Takatori;T. Hiraguri;M. Mizoguchi
提出了一种寄生元件多输入多输出（MIMO）天线的信道容量最大化方法。无功终端连接到寄生元件，并确定电抗值，以实现目标环境的随机高通道容量。该方法将天线的s参数和传播信道（包括寄生元件）作为一个组合电路来处理。在寄生天线上观察到的“寄生信道”的概念被引入以简化优化过程。这种方法可以大大减少设计天线所需的信道测量次数。作为设计实例，在室内环境中测量了线性阵列两端有两个驱动天线的双向Yagi-Uda阵列。最终的设计提供了增强的信道容量，主要是由于与没有寄生天线的天线相比，它提高了信噪比。
This paper proposes a channel capacity maximization method for Multiple-Input Multiple-Output (MIMO) antennas with parasitic elements. Reactive terminations are connected to the parasitic elements, and the reactance values are determined to achieve stochastically high channel capacity for the environment targeted. This method treats the S-parameter and propagation channel of the antenna, including the parasitic elements, as a combined circuit. The idea of the ‘parasitic channel,’ which is observed at the parasitic antenna, is introduced to simplify the optimization procedure. This method can significantly reduce the number of necessary measurements of the channel for designing the antenna. As a design example, a bidirectional Yagi-Uda array, which has two driven antennas at both ends of the linear array, is measured in an indoor environment. The resulting design offers enhanced channel capacity mainly due to its improved signal-to-noise ratio compared to the antenna without the parasitic antennas.