A CMOS Vector-Sum Phase Shifter for 5G mm-Wave Application
- Authors
- Kim, Eunjung; Kim, Younghwan; Jeon, Sanggeun
- Issue Date
- 1월-2022
- Publisher
- KOREAN INST ELECTROMAGNETIC ENGINEERING & SCIENCE
- Keywords
- CMOS; Millimeter-Wave (mm-wave); Phased Array; Vector-Sum Phase Shifter (VSPS); 5G
- Citation
- JOURNAL OF ELECTROMAGNETIC ENGINEERING AND SCIENCE, v.22, no.1, pp.8 - 11
- Indexed
- SCIE
KCI
- Journal Title
- JOURNAL OF ELECTROMAGNETIC ENGINEERING AND SCIENCE
- Volume
- 22
- Number
- 1
- Start Page
- 8
- End Page
- 11
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/139419
- DOI
- 10.26866/jees.2022.1.r.54
- ISSN
- 2671-7255
- Abstract
- This paper presents a wideband CMOS vector-sum phase shifter (VSPS) targeting the n260 band of 5G communication. A differential quadrature generator is implemented using a Marchand balun and two 90 degrees coupled-line couplers to improve robustness to process and temperature variations. The quadrature vector signals are combined by a following vector modulator that adopts a double Gilbert-cell topology. The linearity and input-matching performance are enhanced at the expense of extra DC consumption by stacking a current source with high bias. The measurement shows that the VSPS provides a continuous 360 degrees phase shift with an average insertion loss of 16.3 dB at 37 GHz. The root-mean-square (RMS) amplitude and phase errors maintain less than 1.5 dB and 4.9 degrees, respectively, from 30.9 GHz to 41.7 GHz. The input-referred 1-dB compression point is 5.7 dBm at 38 GHz. It is also demonstrated by 484-state measurement that the phase and amplitude can be adjusted in a fine resolution.
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