Frequency Increase in Resonant-Tunneling Diode Cavity-type Terahertz Oscillator

We achieved increase in oscillation frequency of about 250 GHz for resonant-tunneling diode (RTD) THz oscillator with cylindrical cavity resonator. The improvement of oscillation characteristics was achieved at RTD mesa areas of around 0.6 –0.7 μm2 by elimination of parasitic capacitance and optimization of resonator dimensions. Measured frequency characteristics were in good agreement with calculation results.