Phase Locking and Frequency Tuning of Resonant-Tunneling-Diode Terahertz Oscillators

Kota OGINO  Safumi SUZUKI  Masahiro ASADA  

IEICE TRANSACTIONS on Electronics   Vol.E101-C   No.3   pp.183-185
Publication Date: 2018/03/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E101.C.183
Type of Manuscript: BRIEF PAPER
Category: Semiconductor Materials and Devices
terahertz oscillator,  resonant tunneling diode,  frequency tuning,  phase locked loop,  

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Phase locking with frequency tuning is demonstrated for a resonant-tunneling-diode terahertz oscillator integrated with a biased varactor diode. The tuning range of oscillation frequency is 606-613GHz. The phase noise in the output of the oscillator is transformed to amplitude noise, and fed back to the varactor diode together with bias voltage. The spectral linewidth at least <2Hz was obtained at the oscillation frequencies tuned by the bias voltage of the varactor diode.