Compact and very sharp roll-off low-pass filter using folded flag resonator

被引：0

作者：

Kazemi, Seyed Hamed ^{[1
]}

Hayati, Mohsen ^{[1
]}

机构：

[1] Razi Univ, Fac Engn, Elect Engn Dept, Kermanshah, Iran

来源：

JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS | 2021年 / 35卷 / 09期

关键词：

Microstrip lowpass filter; flag resonator; sharp roll-off; suppressing cell;

D O I：

10.1080/09205071.2021.1871865

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, a microstrip low-pass filter (LPF) using folded-flag-shaped resonators is designed and presented. Its base resonator length is 12.4 mm, and the proposed low-pass filter has a sharpness of 0.08 GHz. The filter cut-off frequency is 1.44 GHz, and the return loss is reduced to a level of -17 dB, indicating a flat pass-band. Also, the suppressing cell is used to weaken the disturbing harmonics by a stepped impedance structure and two high-impedance stubs with an L-shaped structure, which results in a bandwidth of 17.78 GHz. The circuit area of the LPF is 20.9 x 7.5 mm(2), which it has created a suitable normalized circuit size (NCS) rate due to the -3 dB cut-off frequency. The figure of merit (FOM) of the proposed filter is 114450, and it indicates that the microstrip LPF responses are optimal as compared to previous works.

引用

页码：1161 / 1175

页数：15

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