Wide-Range Varactor-Tuned Terahertz Oscillator Using Resonant Tunneling Diode |
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| Authors: | Seiichirou Kitagawa Safumi Suzuki Masahiro Asada |
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| Affiliation: | 1. Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-S9-3 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
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| Abstract: | We propose a wide-range varactor-tuned terahertz oscillator using a resonant tunneling diode (RTD) and estimate the tuning range. In a slot antenna, a varactor diode is placed in parallel with an RTD and can be operated with different bias voltages. Frequency tuning is possible by changing the varactor-diode capacitance with the bias voltage. A wide frequency tuning range >200 GHz (500 to 740 GHz) is obtained with an oscillator with a 20-μm-long antenna, 1.3-μm2 RTD mesa, and 16-μm2 varactor-diode mesa by electromagnetic-field analysis including a varactor-diode model. |
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