Balanced dual-band BPF with intrinsic common-mode suppression on double-layer substrate

被引：14
|
作者：
Wang, Kai [1 ]
Zhu, Lei [2 ]
Wong, Sai-Wai [1 ]
Chen, Dong [3 ]
Guo, Zai-Cheng [1 ]
机构：
[1] S China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510640, Guangdong, Peoples R China
[2] Univ Macau, Fac Sci & Technol, Dept Elect & Comp Engn, Taipa, Macau, Peoples R China
[3] Nanjing Univ Posts & Telecommun, Sch Elect Sci & Engn, Nanjing, Jiangsu, Peoples R China
来源：
ELECTRONICS LETTERS | 2015年 / 51卷 / 09期
关键词：
FILTERS;
D O I：
10.1049/el.2015.0327
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 balanced dual-band bandpass filter (BPF) with enhanced common-mode (CM) suppression is proposed. The dual-band differential-mode (DM) bandpass response is obtained using a double-layer substrate. The stub-loaded stepped-impedance resonators are used both in the top and the bottom layers to constitute a dual-band BPF with two controllable passbands. The slotline portion in the middle layer is excited under DM operation. Moreover, the even-symmetrical field along the slotline is highly attenuated under CM excitation, thus achieving excellent CM suppression over the desired DM passbands. To verify the proposed concept, a balanced dual-band BPF, operating at 1.9 and 2.8 GHz, is designed and fabricated, and the simulated and measured results are in good agreement.
引用
收藏
页码：705 / 706
页数：2
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