Title :
A 24-GHz fully integrated isolator with high isolation in standard RF 180-nm CMOS technology
Author :
Jen-Feng Chang ; Jui-Chih Kao ; Yu-Hsuan Lin ; Huei Wang
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A novel 24-GHz MMIC isolator is developed in TSMC 0.18-μm CMOS. A new topology using the nonreciprocal common-source amplifier and the directional coupler is proposed to realize an isolator without ferrite. This isolator achieves 36-dB isolation with 1.8-dB insertion loss. The dc power consumption is only 3.6 mW. The performance of this isolator is comparable to those of the ferrite isolators except for the bandwidth. To the author´s knowledge, this isolator is the first MMIC isolator in CMOS technology.
Keywords :
CMOS integrated circuits; MMIC amplifiers; directional couplers; ferrite isolators; field effect MMIC; CMOS technology; MMIC isolator; directional coupler; ferrite isolators; frequency 24 GHz; loss 1.8 dB; nonreciprocal common-source amplifier; power 3.6 mW; size 180 nm; CMOS integrated circuits; CMOS technology; Couplers; Ferrites; Isolators; MMICs; Topology; CMOS; directional coupler; ferrite; isolator;
Conference_Titel :
Microwave Symposium (IMS), 2014 IEEE MTT-S International
Conference_Location :
Tampa, FL
DOI :
10.1109/MWSYM.2014.6848297
