Abstract
This letter presents a 300-GHz voltage-controlled oscillator (VCO) with high output power and efficiency. The VCO core employs a differential Colpitts topology with inductive degeneration to facilitate a fundamental oscillation at 300 GHz. A common-base output buffer regulates the output power to minimize the power variation during the frequency tuning. The 300-GHz VCO is fabricated in a 130-nm InP double heterojunction bipolar transistor (DHBT) technology. The VCO exhibits a measured frequency tuning range of 9.9 GHz (294.9-304.8 GHz). The peak output power is measured to be 4.7 dBm at 297 GHz. The dc power consumption is 75.6 mW, leading to a high dc-to-RF conversion efficiency of 3.9%. The VCO output power is maintained nearly constant with only a 0.3-dB variation over the entire frequency tuning range. The phase noise is -86.6 dBc/Hz at 10-MHz offset frequency.
Original language | English |
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Article number | 9076340 |
Pages (from-to) | 496-499 |
Number of pages | 4 |
Journal | IEEE Microwave and Wireless Components Letters |
Volume | 30 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2020 May 1 |
Keywords
- High-power source
- InP double heterojunction bipolar transistor (DHBT)
- terahertz source
- voltage-controlled oscillator (VCO)
ASJC Scopus subject areas
- Condensed Matter Physics
- Electrical and Electronic Engineering