A 13th-order CMOS reconfigurable RF BPF with adjustable transmission zeros for SAW-less SDR receivers
A 13th-order CMOS reconfigurable RF BPF with adjustable transmission zeros for SAW-less SDR receivers
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用于无 SAW SDR 接收器的具有可调传输零点的 13 阶 CMOS 可重构 RF BPF
DOI：
10.1109/isscc.2018.8310361
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
H. Hashemi
中科院分区：
文献类型：
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作者：
Pingyue Song;H. Hashemi
目前的蜂窝接收器由于其高选择性、低插入损耗和小形状因数而经常为每个通信频段采用声表面波或声表面波。支持多个通信频带、多输入多输出(MIMO)通信和载波聚合的需要需要使用几个具有大的总占地面积的这种声学滤波器。这些声学RF滤波器使用多个高Q声谐振器在高阶传递函数中创建多个极点和传输零点，以在近乎平坦的通带、快速滚降和高度衰减的阻带内实现低插入损耗。集成无源元件的低品质因数，特别是电感，导致插入损耗(与滤波器阶数成正比，与元件品质因数成反比)显著增加，并导致等效RF滤波器的阻带抑制较差。
Current cellular receivers often employ acoustic filters (SAW or BAW) for each communication band due to their high selectivity, low insertion loss, and small formfactor. The need to support multiple communication bands, multi-input multi-output (MIMO) communications, and carrier aggregation necessitates the use of several such acoustic filters with a large overall footprint. These acoustic RF filters employ several high-Q acoustic resonators to create several poles and transmission zeros in a high-order transfer function to achieve low insertion loss within a nearly flat passband, fast roll-off, and highly attenuated stopband. The low quality factor of integrated passive components, specifically inductors, leads to a significant increase of insertion loss (proportional to the filter order and inversely proportional to the component quality factor) and poor stopband rejection for an equivalent RF filter.