An Active Leakage Canceller Adopting Switched-Capacitor Digital Power Amplifier for UHF-RFID Transceiver

Kyung Sik Choi; Subin Kim; Jinho Ko; Sang Gug Lee

doi:10.1109/LMWC.2021.3070871

An Active Leakage Canceller Adopting Switched-Capacitor Digital Power Amplifier for UHF-RFID Transceiver

Kyung Sik Choi, Subin Kim, Jinho Ko, Sang Gug Lee

Electronic Engineering Program

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

A low-noise active leakage canceller (ALC) for radio frequency identification (RFID) transceiver is reported. The proposed ALC suppresses the strong transmitter (TX) leakage at the receiver (RX) input through continuous leakage tracking by employing an I/Q harmonic rejection switched-capacitor digital power amplifier (I/Q HR SC DPA). Compared to the analog feedback loop-based ALC, the proposed ALC minimizes the noise figure (NF) degradation in the RX and eliminates the large-size passive components in the analog low pass filter, which leads to high RX sensitivity and small chip area. Implemented in a 55-nm CMOS, the proposed ALC suppresses -10 dBm TX leakage down to -47.2 dBm while degrading the RX NF by 0.4 dB at the offset frequency of 640 kHz.

Original language	English
Article number	9395126
Pages (from-to)	604-607
Number of pages	4
Journal	IEEE Microwave and Wireless Components Letters
Volume	31
Issue number	6
DOIs	https://doi.org/10.1109/LMWC.2021.3070871
State	Published - Jun 2021

Keywords

Active leakage canceller (ALC)
leakage cancellation
power amplifier (PA)
radio frequency identification (RFID)

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10.1109/LMWC.2021.3070871

Cite this

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title = "An Active Leakage Canceller Adopting Switched-Capacitor Digital Power Amplifier for UHF-RFID Transceiver",

abstract = "A low-noise active leakage canceller (ALC) for radio frequency identification (RFID) transceiver is reported. The proposed ALC suppresses the strong transmitter (TX) leakage at the receiver (RX) input through continuous leakage tracking by employing an I/Q harmonic rejection switched-capacitor digital power amplifier (I/Q HR SC DPA). Compared to the analog feedback loop-based ALC, the proposed ALC minimizes the noise figure (NF) degradation in the RX and eliminates the large-size passive components in the analog low pass filter, which leads to high RX sensitivity and small chip area. Implemented in a 55-nm CMOS, the proposed ALC suppresses -10 dBm TX leakage down to -47.2 dBm while degrading the RX NF by 0.4 dB at the offset frequency of 640 kHz.",

keywords = "Active leakage canceller (ALC), leakage cancellation, power amplifier (PA), radio frequency identification (RFID)",

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AU - Ko, Jinho

AU - Lee, Sang Gug

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AB - A low-noise active leakage canceller (ALC) for radio frequency identification (RFID) transceiver is reported. The proposed ALC suppresses the strong transmitter (TX) leakage at the receiver (RX) input through continuous leakage tracking by employing an I/Q harmonic rejection switched-capacitor digital power amplifier (I/Q HR SC DPA). Compared to the analog feedback loop-based ALC, the proposed ALC minimizes the noise figure (NF) degradation in the RX and eliminates the large-size passive components in the analog low pass filter, which leads to high RX sensitivity and small chip area. Implemented in a 55-nm CMOS, the proposed ALC suppresses -10 dBm TX leakage down to -47.2 dBm while degrading the RX NF by 0.4 dB at the offset frequency of 640 kHz.

KW - Active leakage canceller (ALC)

KW - leakage cancellation

KW - power amplifier (PA)

KW - radio frequency identification (RFID)

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ER -

An Active Leakage Canceller Adopting Switched-Capacitor Digital Power Amplifier for UHF-RFID Transceiver

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Keywords

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