Title :
Millimeter-wave HBT MMIC synthesizers using subharmonically injection-locked oscillators
Author :
Suematsu, E. ; Yagura, M. ; Yamada, A. ; Kishimoto, K. ; Zhu, Yu. ; Twynam, J.K. ; Sakuno, K. ; Hasegawa, T. ; Hasegawa, M. ; Sato, H.
Author_Institution :
Central Res. Labs., Sharp Corp., Nara, Japan
Abstract :
A subharmonically injection-locked MMIC harmonic VCO for use as a synthesized local oscillator in the 60 GHz band has been experimentally investigated. The designs using HBT MMICs are based on the use of 2nd subharmonic injection locking of the harmonic VCOs to upconvert to millimeter-wave frequency and broaden the locking range. The use of the 4th harmonic signal from the VCOs allows a factor of eight increase in the locking range. The transmission type injection-locked MMIC VCO with the refractive type load circuit increases not only the locking range, but also the high-order harmonic output power in the locked VCO output.
Keywords :
III-V semiconductors; MMIC; MMIC oscillators; bipolar MIMIC; cellular radio; frequency synthesizers; gallium arsenide; harmonic oscillators (circuits); harmonics; heterojunction bipolar transistors5801747; injection locked oscillators; millimetre wave oscillators; radio equipment; voltage-controlled oscillators; 60 GHz; EHF; MIMIC; MM-wave IC; MM-wave LO; MMIC synthesizers; harmonic VCO; high-order harmonic output power; locking range; millimeter-wave HBT MMIC; refractive type load circuit; subharmonically injection-locked oscillators; synthesized local oscillator; Frequency; Heterojunction bipolar transistors; Injection-locked oscillators; Local oscillators; MMICs; Millimeter wave circuits; Power system harmonics; Signal synthesis; Synthesizers; Voltage-controlled oscillators;
Conference_Titel :
Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 1997. Technical Digest 1997., 19th Annual
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
0-7803-4083-3
DOI :
10.1109/GAAS.1997.628284
