Single-Stage Frequency Quadrupler With SBD and Four-Octave LPF at 335 GHz
- 9 June 2017
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Terahertz Science and Technology
- Vol. 7 (4), 446-454
- https://doi.org/10.1109/tthz.2017.2709720
Abstract
This paper presents designs of a single-stage quadrupler at 340 GHz based on Schottky varactors with 7 mW maximum output power. The Schottky diode model is invented to improve the accuracy of design, which considers the behaviors of current-voltage (I/V), capacitance-voltage (C/V ), plasma resonance, self-heating effect, and skin effect of Schottky diodes under deep driven situation into consideration. Compact suspended microstrip resonators (CSMRs) are adopted as harmonic rejection structure with minimized length/width ratio and shorted idlers at both the second and third harmonics. The measurement results indicate that the CSMR low-pass filter has stopband bandwidth of more than four-octave, whose S12 <;-10 dB within 140-385 GHz and S11 <;-10 dB below 95 GHz. The measured quadrupler output power is above 1 mW at 322-345 GHz, and the measured peak efficiency achieves above 4.2% at 339.2 GHz with 100 mW driven power.Keywords
Funding Information
- Institute of Electronic Engineering, Microsystem and Terahertz Research Center
- China Academy of Engineering Physics
- National Key Basic Research Program of China (2015CB755406)
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