Millimeter-wave IC design techniques for beam-forming applications
The monolithic millimeter-wave integrated circuits have the advantages of high performance, in terms of bandwidth, power consumption, compact physical size, and hence great integration. Novel building blocks with excellent performance provide the possibility of realizing high speed millimeter-wave communication systems. This research explores and proposes various millimeter-wave design techniques using GLOBALFOUNDRIES 65-nm CMOS technology. In the first part, miniaturized millimeter-wave SPDT
... limeter-wave SPDT switches are investigated and designed. Using the magnetic switchable artificial resonator concept, two designs achieve low insertion loss and high isolation at 130-180 GHz and 220-285 GHz, respectively. The size reduction is more than 90% compared to prior arts. In the second part of the research, CMOS passive phase shifters with fine digital phase control are analyzed and designed. By deploying the proposed switchedvaractor technique, the fabricated prototype achieves 3-bit phase control in a 90° tuning range at 60 GHz, with low insertion loss and compact circuit size. To cater for 360° phase tuning range applications, the miniaturized switch-type phase shifter is co-designed with the former phase shifter. The measured chip features 5bit 360° phase control, low insertion loss, small phase/gain errors, and compact size. II The last part of the research presents a millimeter-wave bidirectional low-noise amplifier power amplifier design without using RF switches. The proposed bidirectional matching networks are employed to emulate the lossy RF switches used for conventional bidirectional amplifier designs. A prototype is designed and fabricated for 60 GHz applications. The measured amplifier obtains stable 20 dB power gain in both operation modes, with low noise figure and medium output power. III ACKNOWLEDGEMENTS This dissertation would not have been possible without the help and support of many people. First, I would like to thank my advisor, Prof. Yeo Kiat Seng. He has invested enormous amount of time in my technical training and his guidance has always been valuable. His motivation and enthusiasm has inspired me to pursue further analysis and understand complex problems. I especially appreciate having the opportunity to do measurements in a cutting edge research lab, where we have measurement equipment all the way up to THz frequency range. Aside from his great technical knowledge and expertise, I also admire his leadership and managerial skills as well as his sense of humor. He has taught so many lessons that I believe will guide me in the future: for example, how to behave in a professional environment, how to give a nice presentation, and how to write a good technical paper. It has been a great pleasure and honor working with him.