Table of Contents
International Journal of Microwave Science and Technology
Volume 2012, Article ID 565906, 3 pages
Research Article

A Second Harmonic Self-Oscillating Mixer Incorporating Resonant Cell Structure

1Department of Electronic Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
2Advanced Research and Development Center, Telefield International (Holdings) Limited, Unit 609-610, Bio-Informatics Centre, Hong Kong Science Park, Hong Kong

Received 2 March 2012; Accepted 29 August 2012

Academic Editor: Giampiero Lovat

Copyright © 2012 Leung Chiu and Quan Xue. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A downconverting second harmonic self-oscillating mixer (SOM) is developed for low-cost wireless communications applications. Incorporating resonant cell in the SOM, we can provide suitable oscillation for generating LO and terminations to all major unwanted mixing products, leading to high conversion gain design. The proposed SOM was measured with 8.5 dB downconversion gain at the RF frequency of 8.2 GHz RF, LO frequency of 4.0 GHz, and IF frequency of 0.2 GHz. The proposed design achieves higher conversion gain than that of the SOM without resonant cell.