Wide Angle Phase-Shifterless Beam Scanning in Unilaterally Coupled Active Antenna Arrays (Special Issue on Microwave and Millimeter Wave Technology)

概要

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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.
社団法人電子情報通信学会の論文
1999-07-25