Resonant-Tunneling-Diode Terahertz Oscillator and Its Wireless Communication Application

Abstract

In the beyond 5G/6G or further future wireless communication system, the terahertz (THz) frequency band will be used for realizing ultra-high data rate of over 100 Gbps with very wide bandwidth. Resonant-tunneling-diode (RTD) THz oscillators are a strong candidate of THz signal sources and can be utilized in the THz communication system. In this paper, we report on a recent progress on our RTD terahertz oscillators and introduce the demonstrations of THz communications with the RTD devices. Until now, owing to continuous development of RTD oscillators, a fundamental oscillation up to 1.98 THz and a high-power operation of 0.7 mW at 1 THz have been achieved. Using the high frequency modulation characteristics, THz communications with several tens Gbps have been demonstrated using various type of RTD oscillators.