ABSTRACT
The unlicensed bandwidth between 57 and 66 GHz is released for multi-Gb/s and broadband communications. Figure 19.1 shows the 60 GHz frequency band allocation in the United States, Canada, Japan, Korea, China, and Europe. As it is known, this is the widest portion of radiofrequency spectrum ever allocated in an exclusive way for wireless unlicensed application that allows multi-Gb/s wireless communications [1-5]. In addition, due to the high path loss at 60 GHz and the peak of resonance of
19.1 Introduction .................................................................................................. 491 19.2 Proposed Architecture .................................................................................. 495 19.3 Circuit Description ....................................................................................... 497
19.3.1 20 GHz PLL ...................................................................................... 497 19.3.1.1 20G LC-VCO ..................................................................... 497 19.3.1.2 PFD/CP/Loop Filter ........................................................... 497
19.3.2 60 GHz ILO ...................................................................................... 499 19.3.3 Down-Converting System ................................................................. 499
19.3.3.1 Frequency Doubler ............................................................. 499 19.3.3.2 Mixer .................................................................................. 501 19.3.3.3 Notch Filter ........................................................................502 19.3.3.4 Transmission Line ..............................................................502 19.3.3.5 Summary ............................................................................505
