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CMOS UHF RFID Rectifier Design and Matching: an Analysis of Process and Temperature Variations

CMOS UHF RFID Rectifier Design and Matching: an Analysis of Process and Temperature Variations
CMOS UHF RFID Rectifier Design and Matching: an Analysis of Process and Temperature Variations
Radio Frequency (RF) power transfer is an enabling technology of RFID systems. CMOS RF rectifiers enable miniaturization and improved integration with full systems. For certain applications, rectifiers may need to be deployed in high or low temperature environments, which can affect their power conversion efficiency (PCE). This work presents the design of a high efficiency 915 MHz CMOS Dickson charge-pump in a 28 nm FD-SOI process, and investigates antenna-based impedance matching as a method of maximizing the PCE for different temperatures and CMOS process variations. With a co-designed antenna, the proposed rectifier achieves 5.4x higher PCE compared to simple inductive-matching at -20 dBm. The PCE is then analyzed for CMOS process and temperature variations. It is shown that the rectifier can maintain 94% of its peak PCE at -15 dBm at -10°C through input-impedance matching. The proposed rectifier and matching technique achieves the highest PCE compared to state-of-the-art Dickson multipliers, while having the smallest die area.
RFID, CMOS, 28 nm, FD-SOI, Rectifier, RFIC, rectenna, impedance matching, process variations, temperature variations, wireless power transfer, rf energy harvesting
IEEE
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Savanth, Anand
943d0249-4c8e-44c6-9851-713bcd410633
Gamage, Sahan
855d3cab-0725-42e3-aaad-d5fdefa846e1
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Savanth, Anand
943d0249-4c8e-44c6-9851-713bcd410633
Gamage, Sahan
855d3cab-0725-42e3-aaad-d5fdefa846e1
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d

Wagih, Mahmoud, Savanth, Anand, Gamage, Sahan, Weddell, Alex S. and Beeby, Steve (2021) CMOS UHF RFID Rectifier Design and Matching: an Analysis of Process and Temperature Variations. In 2021 IEEE International Conference on RFID Technology and Applications (RFID-TA). IEEE.. (In Press)

Record type: Conference or Workshop Item (Paper)

Abstract

Radio Frequency (RF) power transfer is an enabling technology of RFID systems. CMOS RF rectifiers enable miniaturization and improved integration with full systems. For certain applications, rectifiers may need to be deployed in high or low temperature environments, which can affect their power conversion efficiency (PCE). This work presents the design of a high efficiency 915 MHz CMOS Dickson charge-pump in a 28 nm FD-SOI process, and investigates antenna-based impedance matching as a method of maximizing the PCE for different temperatures and CMOS process variations. With a co-designed antenna, the proposed rectifier achieves 5.4x higher PCE compared to simple inductive-matching at -20 dBm. The PCE is then analyzed for CMOS process and temperature variations. It is shown that the rectifier can maintain 94% of its peak PCE at -15 dBm at -10°C through input-impedance matching. The proposed rectifier and matching technique achieves the highest PCE compared to state-of-the-art Dickson multipliers, while having the smallest die area.

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More information

Accepted/In Press date: 28 August 2021
Venue - Dates: 2021 IEEE International Conference on RFID Technology and Applications, , Delhi, India, 2021-10-06 - 2021-10-08
Keywords: RFID, CMOS, 28 nm, FD-SOI, Rectifier, RFIC, rectenna, impedance matching, process variations, temperature variations, wireless power transfer, rf energy harvesting

Identifiers

Local EPrints ID: 451176
URI: http://eprints.soton.ac.uk/id/eprint/451176
PURE UUID: 8ba60e64-a899-4002-b995-6ee64c33fded
ORCID for Mahmoud Wagih: ORCID iD orcid.org/0000-0002-7806-4333
ORCID for Alex S. Weddell: ORCID iD orcid.org/0000-0002-6763-5460
ORCID for Steve Beeby: ORCID iD orcid.org/0000-0002-0800-1759

Catalogue record

Date deposited: 14 Sep 2021 16:02
Last modified: 13 Dec 2021 03:41

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Contributors

Author: Mahmoud Wagih ORCID iD
Author: Anand Savanth
Author: Sahan Gamage
Author: Alex S. Weddell ORCID iD
Author: Steve Beeby ORCID iD

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