A Compact Differential-Mode Wide Stopband Bandpass Filter with Good and Wideband Common-Mode Suppression

作者：Zhang, Gang; Zhao, Yang^*; Yan, Wei

来源：Wireless Communications and Mobile Computing, 2018, 2018: 4032183.

DOI：10.1155/2018/4032183

• RESONATOR

This letter presents a microstrip differential-mode (DM) bandpass filter (BPF) with high and wide stopband suppression under both DM and common-mode (CM) operations. A new coupling topology is formed up to realize the DMBPF by integrating a pair of lambda/2 microstrip transmission lines and two multimode resonators. The DM and CM equivalent half-circuits are established to explain the operating principal. For validation, a DMBPF operating at 2.2 GHz is implemented. Experimental results indicate that the presented DMBPF exhibits not only sharp DM passband selectivity but also deep and ultrawide stopband suppression of more than 30 dB for both DM and CM.

• 出版日期2018
• 单位南京师范大学