Smart antenna with automatic beam switching for mobile communication
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RESEARCH
Open Access
Smart antenna with automatic beam switching for mobile communication Yuchen Ma , Junhong Wang*, Yujian Li, Meie Chen, Zheng Li and Zhan Zhang * Correspondence: wangjunh@bjtu. edu.cn Key Laboratory of All Optical Network and Advanced Telecommunication Network of MOE, Beijing Jiaotong University, Beijing 100044, China
Abstract A new kind of smart antenna capable of automatically switching its main beam to track a moving target is presented. The antenna, which is suitable for mobile communication in long straight spaces, such as railways or highways, integrates a sensing element, signal processing element, and radiating element. The sensing element works based on a frequency-modulated continuous wave and delivers a beat frequency signal containing environmental information to the signal processing element, which is used to control the excitation of the radiating element. To verify the efficiency of the proposed antenna, a prototype is fabricated and implemented in a real corridor scenario. Furthermore, the error vector magnitude (EVM) along the test path is investigated to evaluate the system performance when using the proposed antenna. The results show that this kind of smart antenna is capable of improving mobile communication quality and decreasing energy consumption. Therefore, it is a promising candidate for mobile communication. Keywords: Smart antenna, Automatic beam switching, Mobile communication, Lowenergy consumption, Moving target tracking
1 Introduction With the development of electronic technology and the advent of mobile communication, the construction of flexible and variable short-range wireless communication channels for environmental adaptability has become an important task in the design of mobile communication systems, in which antennas play a key role. For such systems, low-cost antennas may not always be emphasized, but more likely, in the case of moderate cost, antennas have flexible and intelligent characteristics and are combined with artificial intelligence to achieve environmentally cognitive intelligence. Such smart antennas can reduce the energy consumption and increase the reliability of wireless communications. The concept of smart antennas has existed for many years and has received wide attention [1]. Many kinds of antennas have found potential applications in smart communication and detection systems. In [2], an antenna with the capability of radiation pattern changing between six states in the azimuth plane, which is controlled by p-i-n diodes, is proposed. In [3], a compact electronically steerable passive array with six folded monopoles that can realize frequency-controlled scanning by using varactors is © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicat
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