Design of mixers for a 130-GHz transceiver in 28-nm CMOS

A compact and 3-dB bandwidth of 118-145-GHz Gilbert-cell mixer for up-conversion and a 1-dB bandwidth of 106-143-GHz image-rejection (IR) resistive mixer for down-conversion are designed for a 130-GHz transceiver in 28-nm CMOS technology. A wide 10-GHz intermediate frequency (IF) tuning range is obtained for both mixers. The simulated results show a +1.6-dB conversion gain for the Gilbert-cell mixer with a layout size of 720×633 μm
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and 6.1 mW of DC power consumption. An 11-dB conversion loss and 30-dB IR ratio are simulated for the resistive mixer with a layout size of 845×794 μm
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. The simulated 1-dB output compression point is -8 dBm for the Gilbert-cell mixer and 1-dB input compression point is +9 dBm for the resistive mixer.