A Novel Ultra-Wideband Differential Filter Based on Double-Sided Parallel-Strip Line

被引:103
作者
Wang, Xiao-Hua [1 ]
Xue, Quan [1 ]
Choi, Wai-Wa [2 ]
机构
[1] City Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China
[2] Univ Macau, Fac Sci & Technol, Dept Elect & Elect Engn, Macau, Peoples R China
关键词
Differential-/common-mode; differential filter; double-sided parallel-strip line (DSPSL); noise suppression; ultra-wideband (UWB) filter;
D O I
10.1109/LMWC.2010.2050869
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, double-sided parallel-strip line (DSPSL) has been used to build a novel differential filter with ultra- wideband (UWB) response. Swap structures, based on DSPSL, are employed in the design to realize 180 degrees phase shift. So the swap structures can realize the conversion between differential-and common-mode. Utilizing the characteristic, the input common-mode signals will be cancelled at the center of the filter, while the input differential- mode signals can propagate in the proposed filter. The proposed new differential filter was calculated in analytical method, and was simulated by the full-wave electromagnetic simulator, and was validated by the measurement. The last results show they have a good in-band and out-band performance. With fractional bandwidth of 110% centered at 3 GHz, the differential-mode signals can propagate with UWB frequency response, while the common-mode signals are suppressed below -20 dB in the whole frequency band.
引用
收藏
页码:471 / 473
页数:3
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