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

Ragip Ispir; Shigeji Nogi; Minoru Sanagi

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

Ragip Ispir, Shigeji Nogi, Minoru Sanagi

Research output: Contribution to journal › Article › peer-review

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

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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.",

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T1 - Wide Angle Phase-Shifterless Beam Scanning in Unilaterally Coupled Active Antenna Arrays

AU - Ispir, Ragip

AU - Nogi, Shigeji

AU - Sanagi, Minoru

PY - 1999/1/1

Y1 - 1999/1/1

N2 - 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.

AB - 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.

KW - Active antenna

KW - Beam scanning

KW - Coupled oscillators

KW - Phased array

KW - Spatial power combining

KW - Unilateral coupling

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

Abstract

Keywords

ASJC Scopus subject areas

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