Title :
A 2.45/5.2 GHz Image Rejection Mixer With New Dual-Band Active Notch Filter
Author :
Liang, Ching-Piao ; Rao, Pei-Zong ; Huang, Tien-Jien ; Chung, Shyh-Jong
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A 2.45/5.2 GHz dual-band Gilbert downconversion mixer with image rejection function is presented, which is implemented using the 0.18 mum CMOS technology. The proposed differential dual-band image rejection circuitry is employed for the 2.45/5.2 GHz WLAN application to effectively diminish the DC power consumption and complexity of circuit design compared to the traditional Hartley or Weaver architectures. Moreover, the cross-connected pair consisted of NMOS and PMOS transistors in the proposed notch filter will further ameliorate the image rejection capability. The IC prototype achieves conversion gain of 10.5/11 dB, IIP3 of -4.9/-5.2 dBm for RF = 2.45/5.2 GHz and IF = 500 MHz while the image rejection ratio is better than 36/45 dB in the whole operation bandwidth.
Keywords :
CMOS integrated circuits; MMIC mixers; UHF filters; UHF mixers; active filters; circuit complexity; microwave filters; microwave mixers; notch filters; wireless LAN; CMOS technology; DC power consumption; Hartley architectures; NMOS transistors; PMOS transistors; WLAN application; Weaver architectures; circuit design complexity; differential dual-band image rejection circuitry; dual-band Gilbert downconversion mixer; dual-band active notch filter; frequency 2.45 GHz; frequency 5.2 GHz; frequency 500 MHz; gain 10.5 dB; gain 11 dB; image rejection mixer; size 0.18 mum; Complementary metal oxide semiconductor (CMOS); dual-band Gilbert mixer; image rejection;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2009.2032013
