2.4/5.7-GHz CMOS Dual-Band Low-IF Architecture Using Weaver–Hartley Image-Rejection Techniques

Author

Meng, Chin-Chun ; Wu, Tzung-Han ; Syu, Jin-Siang ; Yu, Sheng-Wen ; Tsung, Kuan-Chang ; Teng, Ya-Hui

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu

Volume

57

Issue

3

fYear

2009

fDate

3/1/2009 12:00:00 AM

Firstpage

552

Lastpage

561

Abstract

A 2.4/5.7-GHz dual-band Weaver-Hartley architecture, using 0.18-mum CMOS technology, is demonstrated in this paper. The 2.4-GHz signal is set to be the image signal when the desired signal is at 5.7 GHz, and vice versa. Since the Weaver and Hartley systems are combined into this architecture, the demonstrated architecture rejects not only the first image signal, but also the secondary image signal. The image-rejection ratios of the first image signal and the secondary image signal are better than 40 and 46 dB, respectively. In this paper, a diagrammatic explanation is employed to obtain the image-rejection mechanisms of the Weaver-Hartley architecture.

Keywords

CMOS integrated circuits; MMIC frequency convertors; field effect MMIC; CMOS dual-band down convertors; MMIC frequency convertors; Weaver-Hartley image-rejection; frequency 2.4 GHz to 5.7 GHz; image-rejection ratio; Divider; Hartley architecture; Weaver architecture; image rejection; secondary image rejection;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2008.2012300

Filename

4773159