Design and Optimization of A Direct-Conversion Double-Balanced Mixer for RF Receiver Front-End
Journal: Progress of Electrical and Electronic Engineering (Vol.1, No. 3)Publication Date: 2018-09-30
Authors : Frederick Ray I. Gomez;
Page : 1-9
Keywords : Double-Balanced Mixer; Direct Conversion; Conversion Gain; Noise Figure; RF Front-End;
Abstract
Differential implementation is becoming highly favoured in RFIC (radio frequency integrated circuit) design, notably its high immunity to common-mode noises, acceptable rejection of parasitic coupling, and increased dynamic range. One specific RF front-end building block that is usually designed as a differential circuit is the mixer. This
technical paper presents a study of a differential mixer, notably the double-balanced mixer implemented on a direct-conversion architecture in a standard 90nm CMOS (complementary metal-oxide semiconductor) process. Operating frequency is set at 5GHz, which is a typical frequency for RF (radio frequency) receiver. Impedance matching was essential to fully optimize the mixer design. The direct-conversion double-balance mixer design eventually achieved conversion gain of 11.463dB and noise figure of 16.529dB, comparable to mixer designs from past research and studies.
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