| 一种应用于超高频RFID的自干扰抵消电路 |
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| 引用本文： | 金科,陈松,王云阵,林福江.一种应用于超高频RFID的自干扰抵消电路[J].微电子学,2017,47(5):648-651. |
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| 作者姓名： | 金科 陈松 王云阵 林福江 |
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| 作者单位： | 中国科学技术大学 电子科学与技术系, 合肥 230027,中国科学技术大学 电子科学与技术系, 合肥 230027,中国科学技术大学 电子科学与技术系, 合肥 230027,中国科学技术大学 电子科学与技术系, 合肥 230027 |
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| 基金项目： | 国家自然科学基金青年科学基金资助项目(61404123) |
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| 摘 要： | 提出了一种应用于超高频RFID的集成自干扰抵消电路,它主要由一个6位有源移相器、一个3位可控增益功率放大器和缓冲器组成。有源移相器采用可降位的编码方式,简化了数字逻辑。可控增益功率放大器通过采用电容补偿技术和偏置点的优化选取来提高线性度。该自干扰抵消电路在130 nm CMOS工艺下实现,采用1.5 V和3.3 V双电源供电。后仿真结果显示,针对8 dBm的自干扰信号,该电路在840~940 MHz带宽内的自干扰抑制比大于28 dB。
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| 关 键 词： | 超高频RFID 自干扰抵消 有源移相器 功率放大器 |
| 收稿时间： | 2016/11/21 0:00:00 |
A Self-Jammer Canceller for UHF RFID Application |
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| JIN Ke,CHEN Song,WANG Yunzhen and LIN Fujiang.A Self-Jammer Canceller for UHF RFID Application[J].Microelectronics,2017,47(5):648-651. |
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| Authors: | JIN Ke CHEN Song WANG Yunzhen and LIN Fujiang |
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| Institution: | Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, P. R. China,Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, P. R. China,Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, P. R. China and Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, P. R. China |
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| Abstract: | An integrated self-jammer canceller for UHF RFID application was presented. It mainly consisted of a 6-bit active phase shifter, a 3-bit gain controllable power amplifier and a buffer. The digital logic was simplified by a new bit-number-reduced encoding method in the active phase shifter. And the linearity of the gain controllable power amplifier was improved through the capacitance compensation technique and the optimization of biasing point. The proposed circuit was implemented in a 130 nm CMOS process with dual power supplies of 1.5 V and 3.3 V. For an 8 dBm self-jammer signal, the post simulation results showed that the cancellation ratio of the circuit was more than 28 dB within the bandwidth of 100 MHz, which was 840~940 MHz. |
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| Keywords: | UHF RFID Self-jammer cancellation Active phase shifter Power amplifier |
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