【作者】 张莉莉；

【导师】 张世林；

【作者基本信息】 天津大学 ， 微电子学与固体电子学， 2014， 硕士

【摘要】 微波频段的射频标签具有更远的通信距离和更大的数据传输速率等优势,有望应用于需求巨大的物流、物联网、车联网等领域,应用前景非常可观。本文基于ISO/IEC 18000-4协议标准,分析与设计了应用于2.45GHz半有源标签接收机中的复数镜像抑制滤波器,达到了低中频接收机结构对镜像信号衰减的要求。首先,从射频标签的发展历程和趋势方面展开介绍,分析了微波段射频标签的研究进展。然后对不同结构的无线接收机从功耗、集成度、噪声和失调等方面进行了阐述。接着详细讲述滤波器的相关理论,包括滤波器分类、近似函数性能指标和设计方法等。从低中频接收结构的角度,阐述了复数带通滤波器相关理论,以及对有源滤波器中主流的两种结构:Active-RC和Gm-C进行了具体分析。最后根据标准确定的复数镜像抑制滤波器的指标,采用UMC 0.18μm工艺设计了Active-RC结构的复数带通滤波器,其仿真结果:中心频率为2MHz,带宽为1MHz,增益为13.6dB,邻近信道(1MHz和3MHz处)衰减大于27dB,镜像抑制比大于80dB,输入三阶交调点约为17dBm,输出噪声为165nV/(?),静态功耗为12.6mW。此外,重点完成了Gm-C结构Biquad级联方式的6阶巴特沃斯复数带通滤波器从电路到版图的整个过程,其性能仿真结果为:中心频率为2MHz,带宽为1MHz,增益为13.6dB,邻近信道(1MHz和3MHz处)衰减大于25dB,镜像抑制比大于70dB,输出噪声为65nV/(?),静态功耗为9mW,性能指标能够到达2.45GHz半有源标签对滤波器的要求。更多还原

【Abstract】 With so many advantages, including long communication distance and high data rate, RF tags in microwave band which have a very impressive prospect will be applied to the huge demand areas such aslogistics, networking, car networking and so on. Based on ISO/IEC18000-4 standard protocol, the study analyzes and designs a complex image rejection filter which is applied to the receiver of semi-active tags for 2.45 GHz, and it meets the demand that image signal should be attenuated for low IF receiver.Firstly, the thesis introduces the development process and trend of RF tags, and analyzes the research progress of RF tags in microwave band. Then the wireless receivers with different structures are described from several aspects such as power, integration, noise and disorder. Next, the thesis gives a detailed account of the filter theory, including filters classification, approximation function and design methods. The theory of complex band-pass filter is described from the perspective of the low IF receiver architecture. And the mainstream filter structure of Active-RC and Gm-C are analyzed in detail. Finally, according to the protocol, the index of filter is determined, the schematic of Active-RC complex filter is designed in UMC 0.18μm,the simulation result shows as follows: center frequency is 2MHz, bandwidth is 1MHz,gain is 13.6d B, the adjacent channel(1MHz and 3MHz) attenuation is greater than 27 d B, image rejection ratio is greater than 80 d B,input third-order intercept point is about 17 d Bm,output noise is about 165 n V/(?) and the static power dissipation is 13 m W.The thesis emphasizes on the design of Biquad cascade of 6th order Butterworth complex band-pass filter based on Gm-C structure and the simulation results shows as follow: center frequency is 2MHz,the bandwidth is 1MHz,gain is 13.6d B,adjacent channels(1MHz and 3MHz) attenuation is greater than 25 d B,the image rejection ratio is greater than 70 d B,output noise is about 65 n V/(?),and the static power is 9m W,the perfromace meets the demand of system.更多还原