Abstract
This paper presents the design and the implementation of a fully integrated active phase shifter for beamforming at 5.8 GHz. The proposed circuit, implemented in a 0.25 µm BiCMOS SiGe:C process, is based on an original architecture using an injection-locked oscillator (ILO) associated with an in-phase/quadrature (IQ) modulator. The dynamic behaviour of an ILO is first analysed theoretically and important characteristics are deduced. At 2.5 V power supply voltage and total power dissipation of only 92.5 mW, the proposed circuit allows to obtain a 360° phase shift range and occupies 1.43 mm2. This phase shift is synthesised using the ILO for fine-tuning and the IQ modulator for coarse tuning.
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Acknowledgements
The authors would like to thank O. Negro and S. Soubie for their technical support. The authors also thank the LABEX Σ-LIM for the financial support.
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Kanoun, M., Jadav, B.P.S., Cordeau, D. et al. A 5.8 GHz fully integrated BiCMOS SiGe:C injection-locked-oscillator-based active phase shifter for energy beamforming. Analog Integr Circ Sig Process 106, 363–374 (2021). https://doi.org/10.1007/s10470-020-01586-0
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DOI: https://doi.org/10.1007/s10470-020-01586-0