Band-Notched Balanced UWB BPF With Stepped-Impedance Slotline Multi-Mode Resonator

被引：67

作者：

Lee, Ching-Her ^{[1
]}

Hsu, Chung-I. G. ^{[2
]}

Chen, Chung-Jung ^{[1
]}

机构：

[1] Natl Changhua Univ Educ, Grad Inst Commun Engn, Changhua 500, Taiwan

[2] Natl Yunlin Univ Sci & Technol, Dept Elect Engn, Yunlin 640, Taiwan

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2012年 / 22卷 / 04期

关键词：

Balanced ultra-wideband (UWB) bandpass filter (BPF); common-mode (CM) suppression; differential-mode (DM) operation; slotline resonator; FILTER;

D O I：

10.1109/LMWC.2012.2188019

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：

This letter presents a new 5 GHz band-notched balanced ultra-wideband (UWB) bandpass filter (BPF), which is designed using a stepped-impedance slotline multi-mode resonator (MMR). To obtain favorable uniform differential-mode (DM) response, a microstrip-to-slotline transition is used as the signal-feeding structure and the first three resonant modes of the slotline MMR are located in the UWB passband. Common-mode (CM) signal rejection is achieved by deploying the slotline MMR in such a way that the quarter-wavelength resonances occurring near the input and output sides of the resonator are well decoupled. Also featured in this design is the blocking of unwanted WLAN signals, which is achieved by loading the input feed-lines with a stepped-impedance microstrip stub to create a notch-band centered at 5.5 GHz. The designed BPF has a measured minimum DM insertion loss of 0.83 dB in the UWB passband, in which the measured CM suppression is larger than 18.85 dB.

引用

页码：182 / 184

页数：3

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