Low-Loss Highly Linear Integrated Passive Phase Shifters for 5G Front Ends on Bulk CMOS
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© 1963-2012 IEEE. Two passive phase shifters (PSs) are proposed to minimize insertion loss (IL) in bulk CMOS technology for 28-GHz fifth generation integrated phased-array transceivers. The first PS is based on a true delay phase shift structure, where a modification is proposed to facilitate the use of larger switch size minimizing the IL in the bypass mode. The second PS is based on matched high-pass and low-pass sections to maximize the bandwidth of the phase shift. Two 3-bit passive PS prototypes, implemented in 40-nm bulk CMOS technology, are designed to be shared between the transmitter and receiver units. The first and second prototypes achieve low IL of 6 dB across 24-34- and 22-36-GHz frequency ranges with root-mean-square phase error less than 13° and 12.8°, respectively. The two prototypes have input and IIP3 higher than 8.5 and 21 dBm, respectively.
author list (cited authors)
Elkholy, M., Shakib, S., Dunworth, J., Aparin, V., & Entesari, K.