A triple-tuned ultra-wideband VCO

Masaomi Tsuru; Kenji Kawakami; Ke N.Ichi Tajima; Kazuhiro Miyamoto; Masafumi Nakane; Kenji Itoh; Moriyasu Miyazaki; Yoji Isota

doi:10.1109/TMTT.2007.913377

A triple-tuned ultra-wideband VCO

Masaomi Tsuru^*, Kenji Kawakami, Ke N.Ichi Tajima, Kazuhiro Miyamoto, Masafumi Nakane, Kenji Itoh, Moriyasu Miyazaki, Yoji Isota

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We have already proposed a triple-tuned voltage-controlled oscillator (VCO) for achieving an ultra-wideband characteristic. The triple-tuned VCO consists of an active device and three tuned circuits. The fabricated VCO has achieved the oscillation bandwidth of 5.6-16.8 GHz and the phase noise of - 114.9 dBc/Hz +/-2.9 dB at 1-MHz offset from the carrier. In this paper, for the first time, the conditions that the VCO achieves the ultra-wideband characteristic are clarified by formulation and simulation. It is also clarified that a transistor of the larger emitter size is suitable for the wideband VCO. In addition, the performances of the proposed VCO are compared with other reported wideband VCOs. As a result, it is shown that the proposed VCO has achieved the lowest figure of merit in the C-K u-band.

Original language	English
Pages (from-to)	346-354
Number of pages	9
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	56
Issue number	2
DOIs	https://doi.org/10.1109/TMTT.2007.913377
Publication status	Published - 2008 Feb
Externally published	Yes

Keywords

Broadband communication
Flip-chip devices
Radar applications
Tunable circuits and devices
Varactors
Voltage-controlled oscillators (VCOs)

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TMTT.2007.913377

Cite this

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title = "A triple-tuned ultra-wideband VCO",

abstract = "We have already proposed a triple-tuned voltage-controlled oscillator (VCO) for achieving an ultra-wideband characteristic. The triple-tuned VCO consists of an active device and three tuned circuits. The fabricated VCO has achieved the oscillation bandwidth of 5.6-16.8 GHz and the phase noise of - 114.9 dBc/Hz +/-2.9 dB at 1-MHz offset from the carrier. In this paper, for the first time, the conditions that the VCO achieves the ultra-wideband characteristic are clarified by formulation and simulation. It is also clarified that a transistor of the larger emitter size is suitable for the wideband VCO. In addition, the performances of the proposed VCO are compared with other reported wideband VCOs. As a result, it is shown that the proposed VCO has achieved the lowest figure of merit in the C-K u-band.",

keywords = "Broadband communication, Flip-chip devices, Radar applications, Tunable circuits and devices, Varactors, Voltage-controlled oscillators (VCOs)",

author = "Masaomi Tsuru and Kenji Kawakami and Tajima, {Ke N.Ichi} and Kazuhiro Miyamoto and Masafumi Nakane and Kenji Itoh and Moriyasu Miyazaki and Yoji Isota",

year = "2008",

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doi = "10.1109/TMTT.2007.913377",

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volume = "56",

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AU - Tsuru, Masaomi

AU - Kawakami, Kenji

AU - Tajima, Ke N.Ichi

AU - Miyamoto, Kazuhiro

AU - Nakane, Masafumi

AU - Itoh, Kenji

AU - Miyazaki, Moriyasu

AU - Isota, Yoji

PY - 2008/2

Y1 - 2008/2

N2 - We have already proposed a triple-tuned voltage-controlled oscillator (VCO) for achieving an ultra-wideband characteristic. The triple-tuned VCO consists of an active device and three tuned circuits. The fabricated VCO has achieved the oscillation bandwidth of 5.6-16.8 GHz and the phase noise of - 114.9 dBc/Hz +/-2.9 dB at 1-MHz offset from the carrier. In this paper, for the first time, the conditions that the VCO achieves the ultra-wideband characteristic are clarified by formulation and simulation. It is also clarified that a transistor of the larger emitter size is suitable for the wideband VCO. In addition, the performances of the proposed VCO are compared with other reported wideband VCOs. As a result, it is shown that the proposed VCO has achieved the lowest figure of merit in the C-K u-band.

AB - We have already proposed a triple-tuned voltage-controlled oscillator (VCO) for achieving an ultra-wideband characteristic. The triple-tuned VCO consists of an active device and three tuned circuits. The fabricated VCO has achieved the oscillation bandwidth of 5.6-16.8 GHz and the phase noise of - 114.9 dBc/Hz +/-2.9 dB at 1-MHz offset from the carrier. In this paper, for the first time, the conditions that the VCO achieves the ultra-wideband characteristic are clarified by formulation and simulation. It is also clarified that a transistor of the larger emitter size is suitable for the wideband VCO. In addition, the performances of the proposed VCO are compared with other reported wideband VCOs. As a result, it is shown that the proposed VCO has achieved the lowest figure of merit in the C-K u-band.

KW - Broadband communication

KW - Flip-chip devices

KW - Radar applications

KW - Tunable circuits and devices

KW - Varactors

KW - Voltage-controlled oscillators (VCOs)

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A triple-tuned ultra-wideband VCO

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Keywords

ASJC Scopus subject areas

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