A triple tuned ultra-wideband VCO in X-K band

Masaomi Tsuru*, Kenji Kawakami, Ken'ichi Tajima, Kazuhiro Miyamoto, Masafumi Nakane, Morishige Hieda, Moriyasu Miyazaki

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We have already proposed a triple tuned Voltage Controlled Oscillator (VCO) for achieving an ultra-wideband characteristic. The fabricated VCO in C-Ku band has achieved the oscillation bandwidth of 5.6GHz-16.8GHz. In this paper, for achieving the wide oscillation bandwidth in the higher frequency band, we proposes a VCO that consists of a MMIC working as an active circuit and external hyper-abrupt junction varacter diodes connect to the MMIC with Au wires. The fabricated VCO in X-K band achieves the oscillation bandwidth of 9.9GHz-21.9GHz and the phase noise of - 109.4dBc/Hz +/-2.4dB at 1MHz offset from the carrier. In addition, it is shown that the fabricated VCO achieves the widest oscillation bandwidth and the lowest phase noise in X-K band compared with other reported wideband VCOs.

Original languageEnglish
Title of host publicationProceedings of the 38th European Microwave Conference, EuMC 2008
Number of pages4
Publication statusPublished - 2008
Externally publishedYes
Event38th European Microwave Conference, EuMC 2008 - Amsterdam, Netherlands
Duration: 2008 Oct 272008 Oct 31

Publication series

NameProceedings of the 38th European Microwave Conference, EuMC 2008


Conference38th European Microwave Conference, EuMC 2008

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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