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该论文提出了一种1.4-2.7GHz高效率RF发射机，采用自动3FLO抑制跟踪陷波滤波器混频器，旨在解决HPUE应用中CIM3线性度问题。通过创新的混频器结构，实现了高输出功率下的严格发射掩模要求。
more time on smartphones to enjoy internet surfing and social networking, etc. To further improve the LTE network efficiency, recently, the Power-Class 2 (PC2) High Power User Equipment (HPUE) applied to B41 is deployed. To support HPUE, RF transmitters (TXs) need to deliver higher output power while maintaining stringent linearity requirements of emission mask, especially for third-order Counter Intermodulation (CIM3) in one Resource Block (1RB) case. CIM3 can be improved by several techniques such as power mixers [1,2], Harmonic-Reject Mixers (HRM) [3], notch-filter mixers [4, 5] and digital TXs [6]. Power-mixer, HRM and digital TX solutions may not be suitable for HPUE due to powerefficiency limitations. The notch-filter mixer is based on a voltage-mode passive
Qing Liu, Daehyun Kwon, QuangDiep Bui, Jeonghyun Choi, Jaehun Lee,
Sanghyun Baek, Seungchan Heo, Thomas Byunghak Cho Samsung Electronics, Suwon, Korea As LTE offers the best wireless experience as never before, people spend much