Very Linear and Low-Noise Ka/Ku-Band Voltage Controlled Oscillators(Special Issue on Low-Distortion, High-Power, High-Efficiency Active Device and Circuit Technology)

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概要

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• A simple and practical methodology to make microwave voltage-controlled oscillators (VCOs) very linear is presented. Incorporating a very short microstrip line (≪λ_g/4) for varactor's bias feed, the C-V curve was shifted by a constant -ΔC and performed a capacitance tailored nearly proportional to V_CONT^-2. This modification featured very linear VCO implementation at no expense of housing and phase noise performance. Ka- and Ku-band VCOs fabricated with this new technique exhibited a constant tuning sensitivity in a wide control voltage range (2-10 V). The phase noise level at 100 kHz offset was as low as -107 dBc/Hz for a 13 GHz-band VCO and better than -85 dBc/Hz for a 38 GHz-band VCO, due to combination of capacitor-coupled high-Q resonator and multiplier. This technology is very effective for quasi-millimeter-wave and millimeter-wave FM/FSK modulation and FMCW radar applications.

• 社団法人電子情報通信学会の論文
• 2002-12-01

著者

• Baba Osamu

  Fujitsu Quantum Devices Limited

• TOKUMITSU Tsuneo

  Fujitsu Quantum Devices Limited

• KAJII Kiyoshi

  Fujitsu Quantum Devices Limited

関連論文

• Very Linear and Low-Noise Ka/Ku-Band Voltage Controlled Oscillators(Special Issue on Low-Distortion, High-Power, High-Efficiency Active Device and Circuit Technology)

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