题目/Title：超高频RFID读写器调制解调模块的设计
                        Design of a modulator and demodulator for UHF RFID readers

作者/Author：高天宝,王敬超,张春,李永明,王志华
                        Tianbao Gao,Jingchao Wang,Chun Zhang,Yongmin Li,Zhihua Wang

期刊/Journal：半导体学报 Chinese Journal of Semiconductors

年份/Issue Date：2008

卷（期）及页码/Volume（No.）&pages：Vol.29, No.7, pp. 1403 - 1406

摘要/Abstract：
分析了超高频RFID读写器的系统结构,设计了用于读写器射频收发机中调制和解调的模块,并在0.18μm CMOS工艺下进行了流片验证。测试结果表明,调制器输入1dB压缩点可达14dBm，插入损耗为1117dB，关断时隔离为33dB，输入输出端皆匹配在50Ω;解调器输入1dB压缩点可达5dBm，噪声系数仅9dB，而且具有4.9dB的电压增益,克服了传统结构没有正增益的缺点；两者均无直流功耗。
This paper presents a modulator and a demodulator designed for UHF RFID readers. The proposed circuits are designed and implemented in a 0.18 μm CMOS technology and measurement shows that the modulator has an input 1 dB compression point of 14 dBm, insertion loss of 1.17 dB, and isolation of 33 dB. The demodulator has an input 1 dB compression point of 5 dBm, noise figure of 9 dB, and voltage conversion gain of 4.9 dB, which is negative in the conventional structure. Neither dissipates DC power.