Publication
IEEE MWCL
Paper

Highly Linear 60-GHz SiGe Downconversion/Upconversion Mixers

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Abstract

A linear RF to IF downconversion and IF to RF upconversion mixers for 60-GHz transceivers were implemented in 0.13-μm SiGe technology. The mixers were implemented using a mixing core only topology for enhanced linearity, with no local oscillator (LO) buffers and a transformer-based matching network for IF frequencies. The downconversion mixer at full attenuation shows a minimum of 10-dBm IIP3 and maximum measured loss of 6.5 dB within the entire 57-66 GHz frequency band. Without attenuation, the conversion gain is above 4 dB, with better than 2-dBm IIP3 and a noise figure maximum value of 14 dB within the band. The transmit mixer exhibits less than 2.5-dB conversion loss, better than 7.5-dBm OIP3 with minimal temperature variations. For improved LO to RF isolation, separated dc bias control is used in the mixing devices providing over 46-dBc LO suppression within the band. The mixers occupy only 0.47 and 0.22 mm2 consuming 56 mW for downconversion mixer with IF amplifier and 27 mW for upconversion mixer.

Date

01 Apr 2017

Publication

IEEE MWCL

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