Title :
A novel image rejection CMOS mixer using T-structure filter
Author :
Phan, Anh-Tuan ; Kim, Chang-Wan ; Kang, Min-Suk ; Chong, Mun-Suk ; Lee, Sang-Gug ; Su, Chun-Deok
Author_Institution :
RFME Lab., Inf. & Commun. Univ., Daejeon, South Korea
Abstract :
In this paper, an image rejection mixer in heterodyne architecture for 2 GHz band applications based on 0.18 μm CMOS technology is presented. The designed mixer uses a T-structure filter to suppress the image signal, leading to the improvements in the noise figure (NF) and conversion gain. An image rejection of 25-85 dB is obtained in a 150 MHz of bandwidth from 1.95 to 2.1GHz with IF varying from 200 to 350MHz. The simulation results show single-side band (SSB) NF of 5 dB improved by 3.4 dB, the conversion gain of 10.5 dB, improved by more than 3 dB. The circuit operates at the supply voltage of 1.8 V, and dissipates 12 mW.
Keywords :
CMOS integrated circuits; UHF mixers; 0.18 micron; 1.8 V; 1.95 to 2.1 GHz; 10.5 dB; 12 mW; 150 MHz; 200 to 350 MHz; 5 dB; T-structure filter; conversion gain; heterodyne architecture; image rejection CMOS mixer; noise figure; single-side band; Amplitude modulation; Bandwidth; CMOS technology; Circuit simulation; Filters; Gain; Image converters; Noise figure; Noise measurement; Signal design;
Conference_Titel :
Devices, Circuits and Systems, 2004. Proceedings of the Fifth IEEE International Caracas Conference on
Print_ISBN :
0-7803-8777-5
DOI :
10.1109/ICCDCS.2004.1393349
