| Budget Amount *help |
¥213,330,000 (Direct Cost: ¥164,100,000、Indirect Cost: ¥49,230,000)
Fiscal Year 2013: ¥24,960,000 (Direct Cost: ¥19,200,000、Indirect Cost: ¥5,760,000)
Fiscal Year 2012: ¥36,920,000 (Direct Cost: ¥28,400,000、Indirect Cost: ¥8,520,000)
Fiscal Year 2011: ¥58,240,000 (Direct Cost: ¥44,800,000、Indirect Cost: ¥13,440,000)
Fiscal Year 2010: ¥43,680,000 (Direct Cost: ¥33,600,000、Indirect Cost: ¥10,080,000)
Fiscal Year 2009: ¥49,530,000 (Direct Cost: ¥38,100,000、Indirect Cost: ¥11,430,000)
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| Research Abstract |
Toward realization of high-capacity wireless communications in the undeveloped terahertz frequency region, we investigated oscillation and modulation of terahertz waves, and wireless data transmission. For the oscillation device, we achieved room-temperature oscillation at 1.55 THz using resonant tunneling diodes with reduced electron delay, which is the highest frequency of semiconductor electron devices. High-power oscillation and high-speed direct modulation of these oscillators were achieved with the structure optimization of the integrated micro-antennas. Modulators for terahertz waves with optical signal and transistors with high current drivability for modulation were also obtained. Wireless data transmission was demonstrated with the resonant- tunneling-diode transmitter and Schottky-barrier-diode receiver, and feasibility of high-capacity communication was obtained.
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