Compact wide-band bandpass filter using microstrip to slotline broadside-couplin

被引：30

作者：

Mandal, Mrinal Kanti ^{[1
]}

Sanyal, Subrata ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Elect & Elect Commun Engn, Kharagpur 721302, W Bengal, India

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2007年 / 17卷 / 09期

关键词：

bandpass filter (BPF); broadside-coupling; microstrip line; slot line;

D O I：

10.1109/LMWC.2007.903436

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 letter, two quarter wavelength microstrip stubs with a shorted slot line resonator etched in the ground plane is used to design a compact wideband bandpass filter (BPF). Wideband characteristics are obtained using broadside-coupling between the stubs and the slot line. 3-dB fractional bandwidth (FBW) is varied by changing coupled line widths. The filter has the advantages of compactness, wide bandwidth, low passband insertion loss (IL), low group delay variation and ease of fabrication. One prototype fabricated filter has a FBW of 60.0% with a maximum passband IL of 0.9 dB and group delay variation of 0.40 nS. BPF occupying area is less than 0.19 lambda(g) x 0.20 lambda(g), where lambda(g) is the guided wavelength at midband frequency 2.5 GHz. Good agreement between measurements and simulations are obtained.

引用

页码：640 / 642

页数：3

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