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High output power 243 GHz voltage controlled oscillator in a 130 nm SiGe BiCMOS process

High output power 243 GHz voltage controlled oscillator in a 130 nm SiGe BiCMOS process

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A four-stage fundamental ring oscillator based on 130 nm SiGe HBT technology is reported. By utilising a novel ground wall decoupling structure as well as a step impedance conversion structure, the generated output power is optimised. The fundamental VCO has a measured peak output power of −1.4 dBm at 243 GHz. The output frequency could be tuned from 237.2 to 249.8 GHz with a tuning range of 5.18%. The core size of the oscillator is only 40 × 80 μm2. The peak DC-to-RF efficiency is 1.95% at a 0.94 V power supply. To the best of our knowledge, the proposed VCO achieves the highest output power compared with the other silicon-based fundamental oscillators over 200 GHz.

References

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      • 4. Kananizadeh, R., Momeni, O.: ‘A 190.5 GHz mode-switching VCO with 20.7% continuous tuning range and maximum power of -2.1 dBm in 0.13 μm BiCMOS’. IEEE Int. Solid-State Circuits Conf. San Francisco, CA, USA, February 2016, pp. 4647.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2017.3887
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