【摘要】 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1.17dB,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.更多还原

【Abstract】 This paper presents a modulator and a demodulator designed for UHF RFID readers.The proposed circuits are designed and implemented in a 0.18μm CMOS technology and measurement shows that the modulator has an input 1dB compression point of 14dBm,insertion loss of 1.17dB,and isolation of 33dB.The demodulator has an input 1dB compression point of 5dBm,noise figure of 9dB,and voltage conversion gain of 4.9dB,which is negative in the conventional structure.Neither dissipates DC power.更多还原