A study of zero-if double-balanced mixer for wimax receivers

Frederick Ray I Gomez; Maria Theresa G De Leon

doi:10.1016/j.heliyon.2019.e01741

A study of zero-if double-balanced mixer for wimax receivers

Heliyon. 2019 May 20;5(5):e01741. doi: 10.1016/j.heliyon.2019.e01741. eCollection 2019 May.

Authors

Frederick Ray I Gomez^{1

2}, Maria Theresa G De Leon¹

Affiliations

¹ Microelectronics and Microprocessors Laboratory, Electrical and Electronics Engineering Institute, College of Engineering, University of the Philippines, Diliman, Quezon City, 1101, Philippines.
² Central Engineering and Development Department, Back-End Manufacturing & Technology, STMicroelectronics Inc., Calamba City, Laguna, 4027, Philippines.

Abstract

Differential approach is becoming highly preferred in radio frequency integrated circuit (RFIC) design due to its advantages, particularly its high immunity to common-mode noises, satisfactory rejection of parasitic coupling, and increased dynamic range. One particular RF front-end building block that is often designed as differential circuit is the mixer. This paper presents a study and design of a differential mixer, particularly the double-balanced mixer implemented on a zero-IF (zero-intermediate frequency) or direct-conversion architecture in a standard 90 nm complementary metal-oxide semiconductor (CMOS) process operating at frequency of 5 GHz, which is a typical frequency for worldwide interoperability for microwave access (WiMAX) receiver. Impedance matching was necessary to fully optimize the mixer design. The zero-IF double-balanced mixer design achieved conversion gain of 11.46 dB and noise figure of 16.53 dB, comparable to other mixer designs.

Keywords: Electrical engineering.