Abstract
The broad spectrum available in Terahertz (THz) band is envisaged to simultaneously meet both data and energy demands of the next-generation battery-limited wireless devices. Recent advances in THz semiconductor technologies and antenna design are closing the gap in low-powered millimeter-scale receiver architectures. Consequently, prospective signal processing and modulation schemes are emerging for base-station transmission to achieve efficient power and high-rate information transfer to an integrated receiver (IntRx). In this paper, we present for the first time an on-off keying (OOK) power modulation scheme for simultaneous THz information and power transfer (STIPT) to an IntRx involving a THz diode-based rectenna demodulator. A novel non-linear rectenna model is first proposed which provides a theoretical upper bound to harvested DC power. By leveraging the convexity of harvested DC power to incoming single-carrier signal power, an OOK power modulation scheme is then designed to maximize power transfer under available input power constraints. Lastly, both theoretical and simulation results involving a THz band GaAs Schottky diode demonstrate that the proposed scheme maximizes power transfer while simultaneously maintaining Gbps data rate and nanosecond latency communication.
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