中国邮电高校学报(英文) ›› 2024, Vol. 31 ›› Issue (3): 80-86.doi: 10.19682/j.cnki.1005-8885.2024.1001

• Electromagnetic Field and Microwave Tech • 上一篇    下一篇

Compact multilayer liquid crystal polymer lowpass filter with 8-shaped inductor

刘维红,王国秀,刘清冉   

  1. School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China
  • 收稿日期:2022-11-11 修回日期:2023-07-02 出版日期:2024-06-30 发布日期:2024-06-30
  • 通讯作者: 刘维红 E-mail:liuweihong@xupt.edu.cn
  • 基金资助:
    the Shaanxi Provincial Innovation Team Project (2020TD-019), and the Xi'an Sciences Plan Project (21XJZZ0075).

Compact multilayer liquid crystal polymer lowpass filter with 8-shaped inductor

Liu Weihong , Wang Guoxiu, Liu Qingran   

  1. School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China
  • Received:2022-11-11 Revised:2023-07-02 Online:2024-06-30 Published:2024-06-30
  • Contact: Liu Weihong E-mail:liuweihong@xupt.edu.cn
  • Supported by:
    the Shaanxi Provincial Innovation Team Project (2020TD-019), and the Xi'an Sciences Plan Project (21XJZZ0075).

摘要: Lumped element lowpass filter (LPF) for ultra-high frequency (UHF) radio frequency (RF) front-end system is
presented based on multilayer liquid crystal polymer (LCP). The lumped element LPF can achieve miniaturization
and one transmission zero on the stopband by the 8-shaped inductor. The lumped element LPF is fabricated on a 4-
layer LCP substrate with a compact size of 9 mm × 14 mm × 0.193 mm. The measured cut off frequency of the
lumped element LPF is 0.5 GHz with insertion loss (IL) less than 0.37 dB. Both measured and simulated results
suggest that it is a possible candidate for the application of UHF RF front-end system.

关键词: lowpass filter (LPF), multilayer liquid crystal polymer (LCP), miniaturization, 8-shaped inductor

Abstract: Lumped element lowpass filter (LPF) for ultra-high frequency (UHF) radio frequency (RF) front-end system is
presented based on multilayer liquid crystal polymer (LCP). The lumped element LPF can achieve miniaturization
and one transmission zero on the stopband by the 8-shaped inductor. The lumped element LPF is fabricated on a 4-
layer LCP substrate with a compact size of 9 mm × 14 mm × 0.193 mm. The measured cut off frequency of the
lumped element LPF is 0.5 GHz with insertion loss (IL) less than 0.37 dB. Both measured and simulated results
suggest that it is a possible candidate for the application of UHF RF front-end system.

Key words: lowpass filter (LPF), multilayer liquid crystal polymer (LCP), miniaturization, 8-shaped inductor