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Open AccessFeature PaperArticle

CMOS RF Transmitters with On-Chip Antenna for Passive RFID and IoT Nodes

Department of Information Engineering, Infrastructure and Sustainable Energy (DIIES), University Mediterranea of Reggio Calabria, 89124 Reggio Calabria, Italy
HWA srl-Spin Off dell’Università Mediterranea di Reggio Calabria, Via Reggio Campi II tr. 135, 89126 Reggio Calabria, Italy
Author to whom correspondence should be addressed.
Electronics 2019, 8(12), 1448;
Received: 30 September 2019 / Revised: 12 November 2019 / Accepted: 26 November 2019 / Published: 1 December 2019
(This article belongs to the Section Microwave and Wireless Communications)
The performances of two RF transmitters, monolithically integrated with their antennas on a single CMOS microchip fabricated in a standard 0.35 µm process, are presented. The usage of these architectures in the Internet of Things (IoT) paradigm is envisioned, as part of a custom conceived data transmission system. The implemented circuits use two different directly on–off keying (OOK) modulated oscillator topologies whose outputs are employed to feed two loop antennas. The powering of both transmitters is duty-cycled for reducing the average power consumption to a few tenths of a microwatt, allowing the usage as low-power transmitters for IoT nodes. The integrated loop antennas radiate sufficient power for a few meters’ communication range. The OOK transmitted signal can be easily detected using a commercial receiver. View Full-Text
Keywords: integrated transmitters; RF CMOS; RFID; Internet of Things integrated transmitters; RF CMOS; RFID; Internet of Things
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Merenda, M.; Iero, D.; G. Della Corte, F. CMOS RF Transmitters with On-Chip Antenna for Passive RFID and IoT Nodes. Electronics 2019, 8, 1448.

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