Open AccessWide frequency‐tunable resonant tunnelling diode terahertz oscillators using varactor diodes
Author(s) -
Kitagawa S.,
Suzuki S.,
Asada M.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.3921
Subject(s) - varicap , voltage controlled oscillator , terahertz radiation , resonant tunneling diode , optoelectronics , quantum tunnelling , diode , capacitance , materials science , voltage , electrical engineering , engineering , optics , physics , electrode , laser , quantum well , quantum mechanics
A resonant tunnelling diode terahertz voltage‐controlled oscillator integrated with a varactor diode (RTD VCO) for a wide tuning range was proposed and fabricated. In single RTD VCO, a tuning range of 120 GHz of the centre frequency of 640 GHz was achieved by a good combination of the RTD and varactor capacitances. A multi‐element array of RTD VCOs was fabricated to increase the tuning range. A very wide frequency tuning of 320 GHz (580–900 GHz) was achieved with a four‐element RTD VCO array.