A Monolithic AlGaN/GaN HEMT VCO Using BST Thin-Film Varactor

  title={A Monolithic AlGaN/GaN HEMT VCO Using BST Thin-Film Varactor},
  author={Cen Kong and Hui Li and Xiaojian Chen and Shuwen Jiang and Jianjun Zhou and Chen Chen},
  journal={IEEE Transactions on Microwave Theory and Techniques},
A monolithic AlGaN/GaN HEMT voltage-controlled oscillator (VCO) using a barium-strontium-titanate (BST) thin-film varactor is presented. The fabrication process of the VCO is fully compatible with the standard process of GaN HEMT monolithic microwave integrated circuits (MMICs). An improved equivalent circuit model of the fabricated BST varactor for microwave application was developed for the MMIC VCO circuit design. The experiment MMIC VCO exhibits 1-GHz tunable bandwidth at the central… CONTINUE READING
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