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 language | English |
|---|---|
| Pages (from-to) | 1188-1194 |
| Number of pages | 7 |
| Journal | IEICE Transactions on Electronics |
| Volume | E82-C |
| Issue number | 7 |
| Publication status | Published - 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