Wide Angle Phase-Shifterless Beam Scanning in Unilaterally Coupled Active Antenna Arrays

Ragip Ispir, Shigeji Nogi, Minoru Sanagi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In coupled oscillator arrays, it is possible to control the inter-element phase shift up to 180° by free-running frequency distribution based on injection-locking phenomenon. In this paper, a new technique to control the inter-element phase shift electronically up to the maximum extent of 360° is reported. Oscillators are unilaterally coupled to the preceding oscillator through one of the two paths, which differ from each other 180° in electrical length and each includes an amplifier. Turning on the desired amplifier one can control the phase shift either -180° to 0° or 0° to 180°. The technique was applied in a three-element oscillator array each coupled to a patch antenna via a round aperture. The radiation beam of the array could be scanned 47° in total.

Original languageEnglish
Pages (from-to)1188-1194
Number of pages7
JournalIEICE Transactions on Electronics
VolumeE82-C
Issue number7
Publication statusPublished - Jan 1 1999

Keywords

  • Active antenna
  • Beam scanning
  • Coupled oscillators
  • Phased array
  • Spatial power combining
  • Unilateral coupling

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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