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Open AccessArticle

Achieving Spatial Multi-Point Focusing by Frequency Diversity Array

1
Institute of Applied Physics, University of Electronic Science and Technology of China, Chengdu 611731, China
2
School of Electrical and Electronic Information, Xihua University, Chengdu 610039, China
3
Department of Electrical, Computers and Biomedical Engineering, University of Pavia, 27100 Pavia, Italy
*
Authors to whom correspondence should be addressed.
Electronics 2019, 8(8), 883; https://doi.org/10.3390/electronics8080883
Received: 5 July 2019 / Revised: 30 July 2019 / Accepted: 5 August 2019 / Published: 9 August 2019
(This article belongs to the Section Microwave and Wireless Communications)
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PDF [4898 KB, uploaded 9 August 2019]
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Abstract

This paper proposes a class of frequency diverse array (FDA) for achieving time-varying spatial focusing for multiple targets. On the basis of single-target focusing of FDA, sequential focus at the four points is achieved by controlling the time period. The effects of frequency offset on the range of focusing area are derived. Since FDA is narrowband in nature, the relative operating bandwidth is limited to be 10%. Under the limitation of the bandwidth, the sequential multi-target focusing in the far-field is achieved. To validate the proposed method, numerical examples of eight-element FDA are reported and discussed. View Full-Text
Keywords: frequency diverse array (FDA); time-varying; focusing; optimization frequency diverse array (FDA); time-varying; focusing; optimization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ding, S.; Huang, Y.-M.; Tang, H.; Bozzi, M.; Wang, B.-Z. Achieving Spatial Multi-Point Focusing by Frequency Diversity Array. Electronics 2019, 8, 883.

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