a Core area.
Author contributions: Dongyan Zhao: Conceptualization, Methodology; Jin Shao: Writing - Original Draft; Chengzhi Li: Writing - Review & Editing; Yanning Chen: Conceptualization, Project administration; Zhen Fu: Supervision, Funding acquisition; Shuaipeng Wang: Investigation, Methodology.
Conflict of interest statement: The authors declare no conflict of interest.
Funding information: This research was funded by The Laboratory Open Fund of Beijing Smart-chip Microelectronics Technology Co., Ltd.（Project No. 546856220116）
Received: xx January 2021 Accepted: xx March 2021
doi: 10.1049/ell2.10001
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