Browsing by Author "Salgado, H. M."
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- Analysis of Resonant Tunnelling Diode Oscillators under Optical ModulationPublication . Tavares, J. S.; Pessoa, L. M.; Figueiredo, José; Salgado, H. M.In this paper, we investigate the optical modulation characteristics of a resonant tunnelling diode (RTD) oscillator. This preliminary work on the first RTD-PD oscillators with an optical window available from the iBROW project demonstrate that this device can effectively be used to accomplish amplitude and frequency modulation with light injection.
- Wireless interrogation of an optically modulated resonant tunnelling diode oscillatorPublication . Cantu, Horacio I.; Salgado, H. M.; Romeira, Bruno; Kelly, Anthony E.; Ironside, C. N.; Figueiredo, Jose M. L.In this work, a resonant tunnelling diode-photo-detector based microwave oscillator is amplitude modulated using an optical signal. The modulated free running oscillator is coupled to an antenna and phase locked by a wireless carrier that allows remote extraction of the information contained in the modulation. An off-the-shelf demodulator has been used to recover the envelope of the baseband data originally contained in the optical signal. Data were successfully transmitted at a rate of 1 MSym/s with a bit error rate below 10-6. (c) 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1728-1730, 2013