Phased-array behavior of a one-dimensional mutually coupled oscillator system controlled by injection signals

Tomomichi Kagawa, Shigeji Nogi, Minoru Sanagi, Kiyoshi Fukui

Research output: Contribution to journalArticlepeer-review


The system configuration, fundamental operation, and PSK modulation of the output wave are discussed for the phased array operation of a mutually coupled one-dimensional oscillator array when signals with different phases are injected at the two ends to make use of the mutual locking and injection locking phenomena. First, the equivalent circuit is analyzed and the condition of phased array operation is derived. It is shown that both the desired mode, appropriate for the phased array operation, and other modes exist. It is demonstrated that injecting the injection signal at the center of the array is effective in enhancing the stability of the desired mode. The transient response of the array is analyzed when a PSK signal is used as the injection signal. A possible means of obtaining a PSK modulated wave as the output is presented. An experiment in the X band, using waveguide oscillators and an active patch antenna array is described. The results are close to the theoretical predictions.

Original languageEnglish
Pages (from-to)45-56
Number of pages12
JournalElectronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
Issue number2
Publication statusPublished - Feb 1997


  • Active antenna
  • Locking phenomenon
  • Microwaves
  • Phased array
  • Spatial power combining

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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