1. A Millimeter-Wave Reconfigurable On-Chip Coupler With Tunable Power-Dividing Ratios in 0.13-μm BiCMOS Technology.
- Author
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Yang, Yang, Hou, Zhang Ju, Zhu, Xi, Che, Wenquan, and Xue, Quan
- Subjects
- *
INSERTION loss (Telecommunication) , *POWER dividers , *VARACTORS , *TECHNOLOGY , *VOLTAGE-controlled oscillators , *PRODUCT returns , *CAPACITORS - Abstract
This paper presents a millimeter-wave (mm-wave) on-chip coupler with tunable power dividing ratios and constant phase response. Composed by two coupled lines, two capacitors and two series-connected varactors, the proposed tunable coupler offers broadband frequency responses for 5G applications. Theoretical analysis for wideband operation is provided. For demonstration, a millimeter-wave tunable coupler is implemented in a standard 0.13-μm SiGe (Bi) CMOS technology and measured through an on-wafer probing system. From 24 to 38 GHz, the proposed tunable coupler shows a power-dividing ratio ranged from 0 to 6.5 dB, while maintaining an in-band return loss of better than 10 dB and output isolation of 20 dB, simultaneously. The phase imbalance is better than ±2.5° with a measured insertion loss of 1.3 dB across the entire tuning range. To the authors’ best knowledge, this is the first time that an on-chip coupler with tunable power-dividing ratios is reported operating at mm-wave bands for, particularly, 5G applications. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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