Open AccessWaveguide coupler for resonant‐tunnelling diode oscillator at 420 GHz
Author(s) -
Matsumoto H.,
Suzuki S.,
Asada M.,
Monnai Y.
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2018.7639
Subject(s) - quantum tunnelling , tunnel diode , diode , waveguide , optoelectronics , resonant tunneling diode , physics , optics , hybrid coupler , electrical engineering , engineering , power dividers and directional couplers , laser , quantum well
The authors proposed a waveguide coupler that extracts the radiation from a resonant‐tunnelling diode (RTD) oscillator at 420 GHz as the fundamental mode of a rectangular waveguide compatible to the WR‐2.2 standard. In the proposed structure, an RTD oscillator chip is embedded inside a hyper hemispherical silicon lens to reshape the radiation from the tiny chip into a collimated beam, which is subsequently converted into the waveguide mode using a linear horn. The authors estimate the transmission efficiency of the coupler to be −3 dB. Integrated in one package, this approach enables handy use of RTD oscillators as a platform for various terahertz applications.