15:15 〜 15:30 [M-1-4] Wide Frequency Tuning in Resonant-Tunneling-Diode Terahertz Oscillator Using Forward-Biased Varactor Diode ○S. Kitagawa1, S. Suzuki1, M. Asada1 (1.Tokyo Tech(Japan)) https://doi.org/10.7567/SSDM.2015.M-1-4