Abstract
This paper proposes the design and analysis of a broadband 2–40 GHz passive distributed drain-pumped mixer using 0.18µm CMOS technology for ultrawide-band (UWB) receivers. To achieve broad bandwidth for the UWB communications, a distributed topology is introduced. A closed-form analytical model for the conversion loss of distributed drain-pumped mixer is presented for the first time. The designed three-stage drain-pumped mixer consumes zero dc power and exhibits a low and flat conversion loss of 5±1dB from 2 to 40 GHz. The single side-band (SSB) noise figure (NF) is below 12.6 dB for the entire range of frequencies and the minimal SSB NF of 10.7 dB achieves at 33 GHz. An input third-order intercept point of 17 dBm achieves at 10 GHz. This mixer is well suitable for low power-consuming, wideband monolithic microwave integrated circuit (MMIC) implementation.
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