Title :
A novel injection-locked oscillator MMIC with combined ultrawide-band active combiner/divider and amplifiers
Author :
Tokumitsu, Tsuneo ; Kamogawa, Kenji ; Toyoda, Ichihiko ; Aikawa, Masayoshi
Author_Institution :
Radio Syst. Lab., NTT Radio Commun. Syst. Labs., Kanagawa, Japan
fDate :
12/1/1994 12:00:00 AM
Abstract :
A subharmonically injection-locked oscillator (ILO) MMIC for local oscillators, synthesizers, and phased-array antennas is proposed. An ultrawide-band four-port active combiner/divider in the oscillator feedback loop provides an FET-oriented circuit topology extremely suitable for single-chip integration, and performs subharmonic injection locking at various subharmonic factors, 1/n. Two types of ILO MMIC´s were constructed. One of them exhibits a locking range as wide as 1 GHz at n=1, and the other operates at n from 1 to 16, with an output power larger than 5 dBm. The proposed ILO MMIC is promising for applications such as microwave and millimeter-wave synthesizers, large-aperture phased array antennas, frequency-selective FM-receivers, and so on
Keywords :
MMIC; MMIC oscillators; feedback oscillators; field effect MMIC; injection locked oscillators; microwave oscillators; 4 to 6 GHz; FET-oriented circuit topology; four-port active combiner/divider; injection-locked oscillator MMIC; local oscillators; oscillator feedback loop; phased-array antennas; single-chip integration; subharmonically injection-locked oscillator; synthesizers; ultrawide-band active combiner/divider; Circuit topology; Cutoff frequency; Frequency conversion; Injection-locked oscillators; MMICs; Microwave antenna arrays; Phase locked loops; Phase noise; Phased arrays; Synthesizers;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
