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首页> 美国卫生研究院文献>Scientific Reports >An Orbital Angular Momentum (OAM) Mode Reconfigurable Antenna for Channel Capacity Improvement and Digital Data Encoding
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An Orbital Angular Momentum (OAM) Mode Reconfigurable Antenna for Channel Capacity Improvement and Digital Data Encoding

机译：轨道角动量（OAM）模式可重构天线用于提高信道容量和数字数据编码

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摘要

For purpose of utilizing orbital angular momentum (OAM) mode diversity, multiple OAM beams should be generated preferably by a single antenna. In this paper, an OAM mode reconfigurable antenna is proposed. Different from the existed OAM antennas with multiple ports for multiple OAM modes transmitting, the proposed antenna with only a single port, but it can be used to transmit mode 1 or mode −1 OAM beams arbitrary by controlling the PIN diodes on the feeding network through a programmable microcontroller which control by a remote controller. Simulation and measurement results such as return loss, near-field and far-field radiation patterns of two operating states for mode 1 and mode −1, and OAM mode orthogonality are given. The proposed antenna can serve as a candidate for utilizing OAM diversity, namely phase diversity to increase channel capacity at 2.4 GHz. Moreover, an OAM-mode based encoding method is experimentally carried out by the proposed OAM mode reconfigurable antenna, the digital data are encoded and decoded by different OAM modes. At the transmitter, the proposed OAM mode reconfigurable antenna is used to encode the digital data, data symbol 0 and 1 are mapped to OAM mode 1 and mode −1, respectively. At the receiver, the data symbols are decoded by phase gradient method.
机译：为了利用轨道角动量（OAM）模式分集，应该优选地由单个天线产生多个OAM波束。本文提出了一种OAM模式可重构天线。与现有的具有用于多个OAM模式传输的多个端口的OAM天线不同，建议的天线仅具有单个端口，但是通过控制馈电网络上的PIN二极管，可以将其用于任意传输模式1或模式-1 OAM波束。由遥控器控制的可编程微控制器。给出了仿真和测量结果，例如回波损耗，模式1和模式-1的两个工作状态的近场和远场辐射图以及OAM模式正交性。所提出的天线可以作为利用OAM分集（即相位分集）以增加2.4？GHz信道容量的候选者。此外，通过所提出的OAM模式可重构天线实验性地执行了基于OAM模式的编码方法，通过不同的OAM模式对数字数据进行编码和解码。在发射机处，所提出的OAM模式可重配置天线用于编码数字数据，数据符号0和1分别映射到OAM模式1和模式-1。在接收机处，数据符号通过相位梯度方法解码。

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