Multi-Band Balanced Couplers With Broadband Common-Mode Suppression

作者：Feng, Wenjie; Zhao, Yu; Che, Wenquan; Gomez-Garcia, Roberto; Xue, Quan^*

来源：IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, 2018, 65(12): 1964-1968.

DOI：10.1109/TCSII.2018.2821161

• Balanced couplers
• coupled lines
• differential-mode couplers
• double-sided parallel-strip line (DSPSL)
• differential/common mode
• multi-band
• 180 degrees phase inverter

Three novel single-/multi-band balanced couplers with wide-band common-mode suppression are proposed. In these double-functionality balanced-coupler architectures, double-sided parallel-strip line 180 degrees. phase inverters are used to realize the broadband common-mode rejection. Furthermore, by loading quarter-wavelength open/short-ended coupled lines at all ports of the single-band differential-mode coupler, dual/triple-band balanced operation with high isolation for the differential-mode power-division bands can be realized into it. For practical verification, three balanced couplers with single-, dual-, and triple-band operation at 1 GHz, 0.72/1.24 GHz, and 0.66/1/1.36 GHz, respectively, are constructed in microstrip technology and tested.

• 出版日期2018-12
• 单位华南理工大学; 南京理工大学