Compact and High Selectivity Cross-Coupled Broadband Microstrip Bandpass Filter

被引：5

作者：

Deng, Hong-wei ^{[1
]}

Zhao, Yong-jiu ^{[1
]}

Fu, Yong ^{[1
]}

He, Ying ^{[1
]}

Gao, Si-ping ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Informat Sci & Technol, Nanjing 210016, Peoples R China

来源：

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2013年 / 55卷 / 10期

关键词：

microstrip bandpass filter; broadband; cross-coupled; half-wavelength resonator; quarter-wavelength resonator; MULTIPLE-MODE RESONATOR; STUB-LOADED RESONATOR; WIDE-BAND; REJECTION; BPF;

D O I：

10.1002/mop.27845

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 article, a new compact and high selectivity broadband microstrip bandpass filter (BPF) is proposed using one folded half-wavelength resonator (FHWR) in the middle and two quarter-wavelength resonators (QWRs). Due to the cross coupling between the source/load and FHWR, four transmission zeros can be created in the lower-and upper-stopband. The transmission zero generated by the coupling between the QWR and parallel-coupling feedline can sharpen the skirt and suppress the first harmonic of the FHWR. To verify the design concept, a microstrip BPF with 1-dB fractional bandwidth (FBW) of 61% centered at 3 GHz is designed and fabricated. Measured results show low insertion loss and flat group delay in the entire passband as well as high out-band rejection. (c) 2013 Wiley Periodicals, Inc.

引用

页码：2501 / 2504

页数：4

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