Terahertz resonant-tunneling-diode oscillator with two offset-fed slot-ring antennas

Abstract

We proposed and fabricated a terahertz resonant-tunneling-diode (RTD) oscillator integrated with two offset slot-ring antennas for high-output power and high-directivity radiation. In this device, the length of the antenna, approximately half the wavelength of the oscillation frequency, enables efficient terahertz radiation. The increased radiation conductance, resulting from the offset and the two slot-ring antennas, enables higher output power. Additionally, radiation directivity can be improved using two slot-ring antennas. The fabricated device generated high-power oscillation of 1.29 mW at 412 GHz. This is the highest output power of a single electronic device oscillator in the 400 GHz range.

Fundamentals and recent advances of terahertz resonant tunneling diodes

“…107) Additionally, in a structure with two slot rings and an offset-feeding, an output power of over 1 mW was obtained in the 400 GHz band. 108) A patch-antenna oscillator integrated with two coupled RTDs has been demonstrated. 109) When coupled with a transmission line instead of a resistance coupling, the in-phase and anti-phase oscillations can be controlled by adjusting the length of the line.…”