Key points are not available for this paper at this time.
This article presents a dual-band high-linearity down-conversion mixer that covers the frequency range of 24–30 and 36–42 GHz and enables 5G millimeter-wave (mm-wave) non-contiguous multiband operations in the major parts of the K -and Ka -bands. A reusable superheterodyne mixer with local oscillator (LO) -reusable technique allows dual-band spectrum shifting. A hybrid linearity-enhanced technique (HLET) is proposed to improve linearity, which combines optimum bias, feedback, and feedforward. On-chip passive edge-coupled or stack-coupled networks are utilized for impedance matching, signal conversion, and compact size. The mixer prototype is fabricated on the 55-nm bulk CMOS process. The proposed mixer achieves the input 1-dB compression point (IP₁\, ₃₁) of 11. 32/11. 06/9. 85 dBm and third-order input intercept point (IIP3) of 22. 8/23. 6/20. 8 dBm at 28/37/39 GHz. The measured LO-to-RF and LO-to-IF isolation is better than 32. 7 and 58. 6 dBc. The implementation used is a high-IF topology with 6-GHz IF frequency, which supports additional sideband rejection. The measurement results show that the mixer exhibits high IP₁\, ₃₁ and IIP3 simultaneously among all designs with the same band and is suitable for high-linearity communication systems.
Hu et al. (Thu,) studied this question.