Low phase noise 77 GHz VCO with optimized terminated impedance at fundamental and second harmonic frequencies

Author

Watanabe, Shinsuke ; Matsuzuka, Takayuki ; Amasuga, Hirotaka ; Goto, Seiki ; Oku, Tomoki ; Ishikawa, Takahide

Author_Institution

High Freq. & Opt. Device Works, Mitsubishi Electr. Corp., Itami, Japan

fYear

2009

fDate

7-12 June 2009

Firstpage

693

Lastpage

696

Abstract

This paper describes the phase noise reduction technique by controlling terminal impedance of fundamental and second harmonic frequencies in VCO. To achieve low phase noise, the correlation between phase noise and second harmonic impedance in oscillator is investigated and two conditions to suppress phase noise are revealed. According to this investigation, a novel VCO is proposed to optimize the fundamental and second harmonic impedances. A fabricated VCO generating 77.0 GHz signal exhibits phase noise of -110 dBc/Hz at 1 MHz offset. To our knowledge, this is the lowest phase noise ever reported for W-band MMIC VCOs.

Keywords

MMIC oscillators; phase noise; submillimetre wave oscillators; voltage-controlled oscillators; W-band MMIC VCO; frequency 1 MHz; frequency 77 GHz; fundamental harmonic frequencies; low phase noise VCO; optimized terminated impedance; phase noise reduction technique; second harmonic frequencies; voltage-controlled oscillators; Equivalent circuits; Feedback circuits; Frequency; Impedance; MMICs; Phase noise; Power system harmonics; Signal generators; Varactors; Voltage-controlled oscillators; MMIC; VCO; phase noise; second harmonic;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International

Conference_Location

Boston, MA

ISSN

0149-645X

Print_ISBN

978-1-4244-2803-8

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2009.5165791

Filename

5165791