Title :
Design of an Optimal Layout Polyphase Filter for Millimeter-Wave Quadrature LO Generation
Author :
Kulkarni, Santosh ; Dixian Zhao ; Reynaert, Patrick
Author_Institution :
Dept. of Electr. Eng. (ESAT), Katholieke Univ. Leuven, Leuven, Belgium
Abstract :
The analysis and design of a two-stage passive RC polyphase filter for millimeter-wave quadrature local oscillator generation is presented. The layout parasitics, which significantly deteriorate the filter performance at millimeter-wave frequencies, are identified with the help of impedance variation and transfer function analysis. To alleviate this parasitic degradation, a new optimal layout structure along with parasitic-compensation technique is proposed, which results in a 15-dB improvement in image rejection ratio, as compared with a conventional layout. Using the proposed techniques, more than 35 dB of image rejection over a bandwidth of 7 GHz is demonstrated in an outphasing transmitter at 60 GHz in 40-nm CMOS.
Keywords :
CMOS integrated circuits; field effect MIMIC; integrated circuit layout; millimetre wave filters; millimetre wave oscillators; passive filters; transfer functions; CMOS process; bandwidth 7 GHz; frequency 60 GHz; image rejection; impedance variation; layout parasitics; millimeter wave quadrature local oscillator generation; optimal layout polyphase filter; parasitic compensation; size 40 nm; transfer function analysis; two-stage passive RC polyphase filter; 60 GHz; Image rejection; millimeter-wave; optimal layout; polyphase filter (PPF); quadrature generation;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2013.2251946