High performance LPF Structure with sharp roll-off and low VSWR

被引：9

作者：

Mousavi, S. M. H. ^{[1
]}

Makki, S. V. A. ^{[2
]}

Hooshangi, Sh. ^{[3
]}

Alirezaee, Sh. ^{[4
]}

Siahkamari, H. ^{[2
]}

Ahmadi, M. ^{[4
]}

机构：

[1] Islamic Azad Univ, Hamedan Branch, Young Researchers & Elite Club, Hamadan, Iran

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

[3] Islamic Azad Univ, Dept Elect Engn, Kermanshah Branch, Kermanshah, Iran

[4] Univ Windsor, Fac Engn, Dept Elect & Comp Engn, Windsor, ON N9B 3P4, Canada

来源：

ELECTRONICS LETTERS | 2015年 / 51卷 / 24期

关键词：

resonator filters; microstrip filters; low-pass filters; symmetrical compact microstrip lowpass filter; LPF; ultra-wide rejection band; voltage standing wave ratio; VSWR; stepped impedance resonator; butterfly-shaped resonator; transmission zeros; bended transmission line; stopband bandwidth; figure-of-merit; frequency; 1; 513; GHz; MICROSTRIP LOWPASS FILTER; WIDE STOPBAND; DESIGN;

D O I：

10.1049/el.2015.2329

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：

A symmetrical compact microstrip lowpass filter (LPF) with ultra-wide rejection band and low voltage standing wave ratio (VSWR) using a novel structure of stepped impedance and butterfly-shaped resonators is presented and fabricated. The LPF has a 3 dB cut-off frequency at 1.513 GHz. The series structure of the butterfly-shaped resonators result in a high roll-off rate of 187.8 dB/GHz. By generating multiple transmission zeros, a wide stopband (with 35 dB rejection degree) is achieved. To reach a small circuit, the bended transmission line is properly utilised. Moreover, 171% relative stopband bandwidth and dimensions of 0.087(g) x 0.157(g) ((g) is the guided wavelength at 1.513 GHz) are other specifications of this LPF. In addition, an acceptable match is obtained between the simulated and measured responses. In the end, the LPF achieves a high figure-of-merit of 82288.

引用

页码：2017 / 2018

页数：2

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