A Multi-Phase Sub-Harmonic Injection Locking Technique for Bandwidth Extension in Silicon-Based THz Signal Generation
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Date
2015-08
Publication Type
Journal Article
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Abstract
This paper presents a multi-phase sub-harmonic injection locking technique. This technique can significantly increase the locking range of a multi-phase injection locking oscillator compared to the conventional single-phase injection locking scheme. By application of this technique, a scalable "active frequency multiplier" chain architecture is proposed, which can generate THz signal from a low mm-wave frequency or RF reference source. We also propose a multi-ring system topology to implement this frequency multiplier scheme. As proof of concept, a cascaded 3-stage 3-phase 2nd-order sub-harmonic injection locking oscillator chain is implemented in the IBM9HP SiGe BiCMOS process with its fT/fmax of 300/350 GHz. The design achieves a maximum output power of -16.6 dBm at 498GHz, a phase noise of -87 dBc/Hz at 1 MHz offset, and a total 5.1% frequency tuning range from 485.1 GHz to 510.7 GHz, which is the largest frequency tuning range among all the reported silicon-based THz oscillator sources in the 0.5 THz band.
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published
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Journal / series
Volume
50 (8)
Pages / Article No.
1861 - 1873
Publisher
IEEE
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Software
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Date collected
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Subject
BiCMOS integrated circuits; Frequency tuning; Harmonic generation; Injection locking; Multi-phase; Ring Oscillator; Signal source; Teraherz
Organisational unit
09757 - Wang, Hua / Wang, Hua