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Ultra-Wideband 4-PAM Backscatter Modulator based on BiCMOS technology for IoT/WPT Applications

Matos, D. ; Torres, R. ; Correia, R. ; Carvalho, N.B.C.

Ultra-Wideband 4-PAM Backscatter Modulator based on BiCMOS technology for IoT/WPT Applications, Proc IEEE Wireless Power Transfer Conf. - WPTC, San Diego, CA, United States, Vol. , pp. - , June, 2021.

Digital Object Identifier: 10.1109/WPTC51349.2021.9458113

Abstract
This paper presents a Pulse-Amplitude Modulation (PAM) backscatter modulator based on BiCMOS technology chip for Wireless Power Transmission (WPT) applications. Both chip design and measurement setup considered are described. The circuit presents a modulator capable of performing PAM modulation in a wide range of frequencies. Then, to evaluate the communication performance, a low-cost Software Defined Radio (SDR) was used to demodulate the received modulated signals. In a wide range of power levels (-60 to -10 dBm) and different data rates in the chosen frequencies, the circuit performance (FM-band, ISM band, DVB-T band, and GSM band) was demonstrated.