| Citation: |
Wang Xiantai, Jin Zhi, Wu Danyu, Shen Huajun, Liu Xinyu. A 10 GHz high-effciency and low phase-noise negative-resistance oscillator optimized with a virtual loop model[J]. Journal of Semiconductors, 2009, 30(11): 115001. doi: 10.1088/1674-4926/30/11/115001
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Wang X T, Jin Z, Wu D Y, Shen H J, Liu X Y. A 10 GHz high-effciency and low phase-noise negative-resistance oscillator optimized with a virtual loop model[J]. J. Semicond., 2009, 30(11): 115001. doi: 10.1088/1674-4926/30/11/115001.
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A 10 GHz high-effciency and low phase-noise negative-resistance oscillator optimized with a virtual loop model
DOI: 10.1088/1674-4926/30/11/115001
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Abstract
A virtual loop model was built by the transmission analysis with virtual ground method to assist the negative-resistance oscillator design, providing more perspectives on output power and phase-noise optimization. In this work, the virtual loop described the original circuit successfully and the optimizations were effective. A 10 GHz high-efficiency low phase-noise oscillator utilizing an InGaP/GaAs HBT was achieved. The 10.028 GHz oscillator delivered an output power of over 15 dBm with a phase-noise of lower than –107 dBc/Hz at 100 kHz offset. The efficiency of DC to RF transformation was 35%. The results led to a good oscillator figure of merit of –188 dBc/Hz. The measurement results agreed well with those of the simulations.-
Keywords:
- oscillator
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References
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Proportional views
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