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Wireless communications in the terahertz band have been recently proposed ascomplement to conventional wired interconnects within computing packages. Suchenvironments are typically highly reverberant, hence showing long channelimpulse responses and severely limiting the achievable rates. Fortunately, thiscommunications scenario is static and can be pre-characterized, which opens thedoor to techniques such as time reversal. Time reversal acts a spatial matchedfilter and has a spatiotemporal focusing effect, which allows not only toincrease the achievable symbol rates, but also to create multiple spatialchannels. In this paper, the multi-user capability of time reversal is exploredin the context of wireless communications in the terahertz band within acomputing package. Full-wave simulations are carried out to validate theapproach, whereas modulation streams are simulated to evaluate the error rateas a function of the transmitted power, symbol rate, and number of simultaneoustransmissions.

Collective Communication Patterns Using Time-Reversal Terahertz Links at the Chip Scale