An Ultra-Wideband Image-Reject Up-Conversion Mixer With a Sandwich-Coupled Transformer for 5G mm-Wave Communication

This letter presents an ultra-wideband 20-42 GHz image-reject up-conversion mixer with low dc-power consumption implemented in 55 nm CMOS technology for multiband mm-Wave 5G systems. A sandwich-coupled transformer (SCT) is adopted to expand the operation bandwidth. The proposed SCT demonstrates good...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 32; no. 9; pp. 1099 - 1102
Main Authors Hu, Kejie, Ma, Kaixue, Ma, Zonglin
Format Journal Article
LanguageEnglish
Published IEEE 01.09.2022
Subjects
bandwidth
Broadband communication
CMOS
Couplings
IRR
millimeter wave
mixer
Mixers
transformer
Transformers
Wideband
Windings
Wireless communication
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Summary:This letter presents an ultra-wideband 20-42 GHz image-reject up-conversion mixer with low dc-power consumption implemented in 55 nm CMOS technology for multiband mm-Wave 5G systems. A sandwich-coupled transformer (SCT) is adopted to expand the operation bandwidth. The proposed SCT demonstrates good performance in enhancing the coupling coefficient and quality factor, which enables wideband impedance matching. Moreover, a quadrature signal generator composed of a transformer and a polyphase filter (PPF) is utilized to generate wideband high-precision I/Q signals without any calibration. With only 24 mW dc-power consumption, the mixer exhibits excellent conversion gain flatness of 1.2±1.5 dB from 20 to 42 GHz. The measured image reject ratio (IRR) is better than −30 dBc within the entire operation band. The measured output 1-dB compression point (OP 1 dB ) is −2.57 dBm at 28 GHz and −3.96 dBm at 38 GHz. The proposed mixer exhibits good broadband characteristics, which can sustain multiband operation.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2022.3163788