广西师范大学学报(自然科学版) ›› 2019, Vol. 37 ›› Issue (4): 37-44.doi: 10.16088/j.issn.1001-6600.2019.04.004

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一款低损耗低噪声宽调谐的高阶级联N通道滤波器

谢丽娜, 蒋品群*, 宋树祥, 岑明灿   

  1. 广西师范大学电子工程学院,广西桂林541004
  • 收稿日期:2018-12-17 出版日期:2019-10-25 发布日期:2019-11-28
  • 通讯作者: 蒋品群(1970—),男,广西全州人,广西师范大学副教授,博士。E-mail: pqjiang@mailbox.gxnu.edu.cn
  • 基金资助:
    国家自然科学基金(61361011);广西自然科学基金(2017GXNSFAA198363);广西高校中青年教师科研基础能力提升项目(2019KY0049);广西高等学校优秀中青年骨干教师培养工程(GXQG022014002)

A Low-Loss, Low-Noise, Wide-Tuned High-Order Cascade N-Path Filter

XIE Lina, JIANG Pinqun*, SONG Shuxiang, CEN Mingcan   

  1. College of Electronic Engineering, Guangxi Normal University, Guilin Guangxi 541004,China
  • Received:2018-12-17 Online:2019-10-25 Published:2019-11-28

摘要: 近年来,N通道滤波器被广泛应用于射频通信和认知无线电等多个领域中。为了降低滤波器的损耗和噪声,拓展其可调谐范围,本文通过在传统的一阶N通道滤波器中引入串联电感,并将其级联的方法,得到了一款低损耗低噪声宽调谐的高阶N通道滤波器。采用伴随网络法获得了高阶级联N通道滤波器的传递函数。伴随网络法的采用大大简化了传递函数的数学推导过程。TSMC 0.18 μm CMOS工艺下的 Cadence 仿真结果表明了传递函数的正确性。Cadence 仿真结果还表明,当电源电压为1.2 V时,高阶级联N通道滤波器中心频率可调范围为0.4~3.0 GHz,插入损耗为1.6 dB,回波损耗为11.6 dB,噪声系数为0.2~0.8 dB,与近年来发表的滤波器相比,综合性能有了较大的提升,可应用于高性能的接收机中。

关键词: N通道滤波器, 高阶级联, 低损耗, 低噪声, 宽调谐, 伴随网络法

Abstract: In recent years, N-path filters have been widely used in many fields such as radio frequency communication and cognitive radio. In order to reduce the loss and noise of the filter and expand its tunable range, this paper introduces series inductance into the traditional first-order N-path filter, and cascades them to obtain a high-order N-path filter with low loss, low noise and wide tuning. The transfer function of the high-order N-path filter is obtained by the adjoint network method. The use of the adjoint network method greatly simplifies the mathematical derivation of the transfer function. The Cadence simulation results in the TSMC 0.18 μm CMOS process show the correctness of the transfer function. The Cadence simulation results also show that when the power supply voltage is 1.2V, the adjustable range of center frequency of the high-order N-path filter is 0.4-3.0 GHz, the insertion loss is 1.6 dB, the return loss is 11.6 dB, and the noise figure is 0.2-0.8 dB. Compared with the published filter, the comprehensive performance of the new filter has greatly improved, and it can be applied to a high-performance receiver.

Key words: N-path filter, high-order cascade, low loss, low noise, wide tuning, adjoint network method

中图分类号: 

  • TN713
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