Frequency-division multiplexer and demultiplexer for terahertz wireless links

Jianjun Ma, Nicholas J. Karl, Sara Bretin, Guillaume Ducournau and Daniel M. Mittleman ()
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Jianjun Ma: Brown University
Nicholas J. Karl: Brown University
Sara Bretin: Institut d’Electronique de Microélectronique et de Nanotechnologie (IEMN)
Guillaume Ducournau: Institut d’Electronique de Microélectronique et de Nanotechnologie (IEMN)
Daniel M. Mittleman: Brown University

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract The development of components for terahertz wireless communications networks has become an active and growing research field. However, in most cases these components have been studied using a continuous or broadband-pulsed terahertz source, not using a modulated data stream. This limitation may mask important aspects of the performance of the device in a realistic system configuration. We report the characterization of one such device, a frequency multiplexer, using modulated data at rates up to 10 gigabits per second. We also demonstrate simultaneous error-free transmission of two signals at different carrier frequencies, with an aggregate data rate of 50 gigabits per second. We observe that the far-field spatial variation of the bit error rate is different from that of the emitted power, due to a small nonuniformity in the angular detection sensitivity. This is likely to be a common feature of any terahertz communication system in which signals propagate as diffracting beams not omnidirectional broadcasts.

Date: 2017
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DOI: 10.1038/s41467-017-00877-x

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