A 1.5-3 GHz Quadrature Balanced Switched-Capacitor CMOS Transmitter for Full Duplex and Half Duplex Wireless Systems

This work proposes a reconfigurable multi-mode digital transmitter based on quadrature balanced switched-capacitor power amplifiers (QB-SCPA), supporting both full duplex (FD) and half duplex (HD) operation. The QB-SCPA architecture provides built-in passive transmit-receive isolation along with an...

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Bibliographic Details
Main Authors: Ginzberg, Nimrod, Regev, Dror, Cohen, Emanuel
Format: Conference Proceeding
Language:English
Subjects:
Full duplex
Half Duplex
Interference cancellation
Phase noise
Power amplifiers
Power measurement
Quadrature Balanced
Quadrature Hybrid
Radio transmitters
Self-Interference Cancellation
Switched Capacitors Power Amplifier
Switches
Wireless communication
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Summary:This work proposes a reconfigurable multi-mode digital transmitter based on quadrature balanced switched-capacitor power amplifiers (QB-SCPA), supporting both full duplex (FD) and half duplex (HD) operation. The QB-SCPA architecture provides built-in passive transmit-receive isolation along with an embedded and wideband self-interference cancellation (SIC) signal injection mechanism. In addition, it allows for phase noise suppression at the RX through clock sharing and exhibits excellent TX and RX linearity. In FD mode, we demonstrate >72 dB of total TX-RX isolation over a BW larger than 1 GHz at 21 dBm peak TX power with 17.4% system PAE. In HD TX mode, the system achieves 23 dBm peak TX power with 26.5% PAE.
ISSN:2375-0995
DOI:10.1109/RFIC49505.2020.9218385