Novel flexible and transparent microstrip low-pass filter design with Π-shaped DGS

doi:10.19682/j.cnki.1005-8885.2025.0008

中国邮电高校学报(英文) ›› 2025, Vol. 32 ›› Issue (1): 88-94.doi: 10.19682/j.cnki.1005-8885.2025.0008

• IC and System Design • 上一篇

Novel flexible and transparent microstrip low-pass filter design with Π-shaped DGS

刘兆函韩宇南 Qiu Xianbo 李贤丽

北京化工大学

收稿日期:2023-08-20 修回日期:2024-10-21 出版日期:2025-02-28 发布日期:2025-02-28
通讯作者: 韩宇南 E-mail:clark-han@139.com
基金资助:
北京市自然科学基金;国家自然科学基金

Novel flexible and transparent microstrip low-pass filter design with Π-shaped DGS

College of Information Science and Technology, Beijing University of hemical Technology, Beijing 100029, China

Received:2023-08-20 Revised:2024-10-21 Online:2025-02-28 Published:2025-02-28
Contact: Yu-Nan HAN E-mail:clark-han@139.com

摘要/Abstract

摘要：

A new design for a transparent low-pass filter ( LPF) using a flexible polyethylene terephthalate ( PET) material and metallic copper was proposed in this paper. The transparent microstrip filter employs an asymmetric Π-shaped structure with dimensions of 260.000 mm × 13.000 mm × 0.148 mm, which owns a narrow transition band and achieves an insertion loss of less than 1. 0 dB below 0. 26 GHz. Furthermore, the insertion loss of the transparent microstrip filter can exceed 30 dB in the stopband from 1. 02 GHz to 6. 50 GHz. Square holes are added to the copper layer to improve the transparency of the LPF, and the filter performance can be adjusted by changing the square hole area and resolution. Additionally, multiple identical structures are cascaded to increase the insertion loss in the stopband while maintaining the passband. The transparent microstrip LPF has the characteristics of flexibility, high transparency, and significant insertion loss in the stopband, making it suitable for applications that require electromagnetic protection in a clear field of vision.

关键词: transparent filter, Π-shaped defected ground structure (Π-shaped DGS), low-pass filter ( LPF)

Abstract:

Key words: transparent filter, Π-shaped defected ground structure (Π-shaped DGS), low-pass filter ( LPF)

中图分类号:

TN713.5

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Novel flexible and transparent microstrip low-pass filter design with Π-shaped DGS

Novel flexible and transparent microstrip low-pass filter design with Π-shaped DGS

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