Differential-mode wideband bandpass filter for UWB application

作者：Li Meng; Fang Zhang; Kwoun Sung Su; Lee Byungje; Kim Jin Young; Choi Jin Joo; Lee Jong Chul^*

来源：Microwave and Optical Technology Letters, 2013, 55(1): 197-200.

DOI：10.1002/mop.27230

• balanced filter
• differential-mode excitation
• common-mode suppression
• ultra-wideband
• microstrip

The design of a differential-mode wideband bandpass filter (BPF) with good common-mode suppression is presented in this article. The structure of the proposed filter is divided to behave like a bandpass or bandstop filter (BSF) under differential- or common-mode operation. The open stubs in the BSF are used to control the 3-dB bandwidth (BW) of the BPF by slightly reducing the 3-dB cut-off BW of the BSF. To validate the design idea, a differential-mode BPF centered at 4 GHz with a 3-dB BW of 55%, near 30 dB common-mode suppression, is designed and fabricated.

• 出版日期2013-1
• 单位哈尔滨工业大学