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.

[1]  M. Asada,et al.  High-Power Operation of Terahertz Oscillators With Resonant Tunneling Diodes Using Impedance-Matched Antennas and Array Configuration , 2013, IEEE Journal of Selected Topics in Quantum Electronics.

[2]  Safumi Suzuki,et al.  Structure dependence of oscillation characteristics of resonant-tunneling-diode terahertz oscillators associated with intrinsic and extrinsic delay times , 2015 .

[3]  Munkyo Seo,et al.  InP HBT IC Technology for Terahertz Frequencies: Fundamental Oscillators Up to 0.57 THz , 2011, IEEE Journal of Solid-State Circuits.

[4]  M. Eremets,et al.  Ammonia as a case study for the spontaneous ionization of a simple hydrogen-bonded compound , 2014, Nature Communications.

[5]  Qing Hu,et al.  MEMS-based tunable terahertz wire-laser over 330 GHz. , 2011, Optics letters.

[6]  Safumi Suzuki,et al.  Fundamental oscillation of resonant tunneling diodes above 1 THz at room temperature , 2010 .

[7]  Safumi Suzuki,et al.  Fundamental Oscillation up to 1.42 THz in Resonant Tunneling Diodes by Optimized Collector Spacer Thickness , 2014 .

[8]  Safumi Suzuki,et al.  Operation of resonant-tunneling diodes with strong back injection from the collector at frequencies up to 1.46 THz , 2014 .

[9]  Masayoshi Tonouchi,et al.  Cutting-edge terahertz technology , 2007 .

[10]  Safumi Suzuki,et al.  Frequency increase in terahertz oscillation of resonant tunnelling diode up to 1.55 THz by reduced slot-antenna length , 2014 .

[11]  Seungyong Jung,et al.  Broadly tunable monolithic room-temperature terahertz quantum cascade laser sources , 2014, Nature Communications.

[12]  Safumi Suzuki,et al.  650-GHz Resonant-Tunneling-Diode VCO With Wide Tuning Range Using Varactor Diode , 2014, IEEE Electron Device Letters.