应用于2.45GHz半有源标签的低中频正交混频器  

Design of Low-IF Quadrture Mixer of Semi-Active RFID in 2.45GHz

作　　者：李志才[1] 毛陆虹[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《微波学报》2015年第2期63-66,71,共5页Journal of Microwaves

基　　金：国家自然科学基金(61372011)

摘　　要：设计了一款用于2.45GHz半有源标签的低中频正交下变频混频器。该混频器采用UMC 0.18μm标准CMOS技术设计和流片,改进了经典的Gilbert结构,并分别采用共跨导正交结构、电流注入结构和正交跨导结构来提高增益、减小噪声和改善线性度。测试结果表明,论文设计的混频器在1.8V工作电压下消耗电流2.25m A,增益是15d B,三阶交调点为2d Bm,在2MHz中频下的噪声系数是14.8d B,所占面积为1.024mm×1.096mm。A quadrature low-IF downcoversion mixer applied in 2. 45 GHz semi-active RFID is described. Implemented by UMC 0. 18μm CMOS process,the design improves classic structure of Gilbert,and introduces architecture of shared transconductor stage,current injection and quadrature transconductor to improve the performance of gain,noise and linearity,respectively. The mixer in 1. 8V voltage supply consumes the current of 2. 25 m A and measures a conversion gain of 15 d B,an IIP3 of 2d Bm,a noise figure of 14. 8d B at 2MHz,the total area is 1. 024 mm × 1. 096 mm.

关 键 词：电流注入结构 下变频混频器 正交跨导结构 2.45GHz半有源标签 共跨导正交结构 

分 类 号：TN773[电子电信—电路与系统]