Widely tunable microwave phase shifter based on silicon-on-insulator dual-microring resonator.

DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark,Build. 343, DK-2800 Kongens Lyngby, Denmark.
Optics Express (Impact Factor: 3.53). 03/2010; 18(6):6172-82. DOI: 10.1364/OE.18.006172
Source: PubMed

ABSTRACT We propose and demonstrate tunable microwave phase shifters based on electrically tunable silicon-on-insulator microring resonators. The phase-shifting range and the RF-power variation are analyzed. A maximum phase-shifting range of 0-600 degrees is achieved by utilizing a dual-microring resonator. A quasi-linear phase shift of 360 degrees with RF-power variation lower than 2dB and a continuous 270 degrees phase shift without RF-power variation at a microwave frequency of 40GHz are also demonstrated.

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