TY - GEN
T1 - Modified re-configurable quadrature balanced power amplifiers for half and full duplex RF front ends
AU - Regev, Dror
AU - Shilo, Shimi
AU - Ezri, Doron
AU - Ming, Gan
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/6/29
Y1 - 2018/6/29
N2 - An RF front-end (RFFE) architecture for dual-mode half and full duplex operation, employing a modified quadrature balanced power amplifier (QBPA), is proposed, where the receive channel is connected to the QBPA transmit isolated output. In this RFFE, the receive signal is reconstructed from inherent output reflections of the two internal power amplifiers employed in the modified QBPA. Re-configurable transmit signal isolation at the receive port enables safe LNA operation at half-duplex and relaxed RF self-interference cancellation (SIC) requirements for full-duplex operation. The S-parameter signal flow diagram of the proposed RFFE is described and analyzed, yielding transmit-receive transfer functions of interest in the presence of antenna back-reflected transmit signal. Transmit-receive isolation compensation for antenna reflections is analytically derived. Circuit simulations of the proposed topology verify the model and theoretical analysis.
AB - An RF front-end (RFFE) architecture for dual-mode half and full duplex operation, employing a modified quadrature balanced power amplifier (QBPA), is proposed, where the receive channel is connected to the QBPA transmit isolated output. In this RFFE, the receive signal is reconstructed from inherent output reflections of the two internal power amplifiers employed in the modified QBPA. Re-configurable transmit signal isolation at the receive port enables safe LNA operation at half-duplex and relaxed RF self-interference cancellation (SIC) requirements for full-duplex operation. The S-parameter signal flow diagram of the proposed RFFE is described and analyzed, yielding transmit-receive transfer functions of interest in the presence of antenna back-reflected transmit signal. Transmit-receive isolation compensation for antenna reflections is analytically derived. Circuit simulations of the proposed topology verify the model and theoretical analysis.
KW - Full-duplex
KW - Half-duplex
KW - Power amplifiers (PA)
KW - RF front-end
KW - Self-interference cancellation (SIC)
UR - http://www.scopus.com/inward/record.url?scp=85051046092&partnerID=8YFLogxK
U2 - 10.1109/WMCaS.2018.8400625
DO - 10.1109/WMCaS.2018.8400625
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AN - SCOPUS:85051046092
T3 - Proceedings of the 2018 Texas Symposium on Wireless and Microwave Circuits and Systems, WMCS 2018
SP - 1
EP - 4
BT - Proceedings of the 2018 Texas Symposium on Wireless and Microwave Circuits and Systems, WMCS 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 Texas Symposium on Wireless and Microwave Circuits and Systems, WMCS 2018
Y2 - 5 April 2018 through 6 April 2018
ER -