Design of wide stopband lowpass filter with sharp roll-off

被引：6

作者：

Hayati, Mohsen ^{[1
]}

Sheikhi, Akram ^{[1
]}

机构：

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

来源：

IEICE ELECTRONICS EXPRESS | 2011年 / 8卷 / 16期

关键词：

microstrip; lowpass filter; delta stub structure; sharp response and wide stopband; LOW-PASS FILTERS; MICROSTRIP; REJECTION;

D O I：

10.1587/elex.8.1348

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 modified semi-circle patch and a semicircle stepped impedance resonator are cascaded to design a compact lowpass filter with sharp response and wide stopband. This filter has 3-dB cutoff frequency at 1.55 GHZ. The transition band is only 0.29GHZ from 1.55 to 1.84 GHZ with -3 dB and -20 dB respectively. Maximum insertion loss is 0.4 dB in the passband and stop bandwidth with attenuation level better than -20 dB extends from 1.84 GHZ up to 12.5 GHZ and up to 15 GHZ is greater than -10 dB, hence wide stopband is achieved. Simulation and measurement results are presented and good agreement between them is achieved. Results show that we have obtained a high Figure-of-Merit (FOM) of 30433.

引用

页码：1348 / 1353

页数：6

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