Yousuke Nishida

TL;DR: An error-free wireless transmission of a 9 Gbit/s on–off keying modulated signal as well as a 4 k video signal is demonstrated using resonant tunnelling diodes as active elements in both the transmitter and the receiver.

TL;DR: The results show that the proposed system can reduce the size and power consumption of various THz systems including sensing, imaging and ranging, which would enable progress to be made in a wide range of fields in such as material science, medicine, chemistry, biology, physics, astronomy, security, robotics and motor vehicle.

Abstract: The development of compact, high-output-power electronic terahertz sources will benefit from coherent combination of power from multiple oscillators. Mutual coupling for power combining and linewidth narrowing generally requires additional, potentially lossy coupling structures that limit array scalability. To address this limitation, two resonant tunneling diode (RTD) oscillators integrated within a single slot-ring antenna are herein proposed. They employ an innate phase-locking mechanism, thereby realizing mutual-coupling and radiation simultaneously. The proposed double-RTD device is experimentally found to demonstrate a single-peak oscillation at 354 GHz with narrow linewidth (2 MHz), higher output power (31 μW), and linearly polarized, unimodal radiation pattern.

TL;DR: In this article, the external feedback effect of a resonant tunneling diode oscillator in terahertz (THz) proximity wireless transmission is modeled and analyzed, and the model is based on the circuit modeling of the resonant tunable diode and the passive structures.