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This paper will discuss resonant tunnelling diode (RTD) sources being developed on a European project iBROW (ibrow.project.eu) to enable short-range multi-gigabit wireless links and microwave-photonic interfaces for seamless links to the optical fibre backbone network. The practically relevant output powers are at least 10 mW at 90 GHz, 5 mW at 160 GHz and 1 mW at 300 GHz and simulation and some experimental results show that these are feasible in RTD technology. To date, 75 - 315 GHz indium phosphide (InP) based RTD oscillators with relatively high output powers in the 0.5 – 1.1 mW range have been demonstrated on the project. They are realised in various circuit topologies including those that use a single RTD device, 2 RTD devices and up to 4 RTD devices for increasingly higher output power. The oscillators are realised using only photolithography by taking advantage of the large micron-sized but broadband RTD devices. The paper will also describe properties of RTD devices as photo-detectors which makes this a unified technology that can be integrated into both ends of a wireless link, namely consumer portable devices and fibre-optic supported base-stations (since integration with laser diodes is also possible).
Edward Wasige,Khalid H. Alharbi,Abdullah Al-Khalidi,Jue Wang,Ata Khalid,Gil C. Rodrigues, andJosé Figueiredo
"Resonant tunnelling diode terahertz sources for broadband wireless communications", Proc. SPIE 10103, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications X, 101031J (24 February 2017); https://doi.org/10.1117/12.2256357
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Edward Wasige, Khalid H. Alharbi, Abdullah Al-Khalidi, Jue Wang, Ata Khalid, Gil C. Rodrigues, José Figueiredo, "Resonant tunnelling diode terahertz sources for broadband wireless communications," Proc. SPIE 10103, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications X, 101031J (24 February 2017); https://doi.org/10.1117/12.2256357