access icon free Wide frequency-tunable resonant tunnelling diode terahertz oscillators using varactor diodes

A resonant tunnelling diode terahertz voltage-controlled oscillator integrated with a varactor diode (RTD VCO) for a wide tuning range was proposed and fabricated. In single RTD VCO, a tuning range of 120 GHz of the centre frequency of 640 GHz was achieved by a good combination of the RTD and varactor capacitances. A multi-element array of RTD VCOs was fabricated to increase the tuning range. A very wide frequency tuning of 320 GHz (580–900 GHz) was achieved with a four-element RTD VCO array.

Inspec keywords: varactors; submillimetre wave diodes; voltage-controlled oscillators; terahertz wave devices; submillimetre wave oscillators; resonant tunnelling diodes

Other keywords: bandwidth 320 GHz; frequency 120 GHz to 900 GHz; four-element RTD VCO array; resonant tunnelling diode terahertz voltage-controlled oscillator; varactor diodes; varactor capacitances; multielement array; wide frequency-tunable resonant tunnelling diode terahertz oscillators

Subjects: Solid-state microwave circuits and devices; Oscillators; Junction and barrier diodes; Capacitors; Quantum interference devices

References

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      • 3. Jung, S., Jiang, A., Jiang, Y., Vijayraghaven, K., Wang, X., Troccoli, M., Belkin, A.M.: ‘Broadly tunable monolithic room-temperature terahertz quantum cascade laser sources’, Nat. Commun., 2014, 5, pp. 17, doi:10.1038/ncomms5267.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2015.3921
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