TY - JOUR
T1 - Power synthesis at 110-GHz frequency based on discrete sources
AU - Zhao, Jiaqi
AU - Zhu, Zhongbo
AU - Cui, Wanzhao
AU - Xu, Kuiwen
AU - Zhang, Bin
AU - Ye, Dexin
AU - Li, Changzhi
AU - Ran, Lixin
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Terahertz technology is one of the research fronts in the microwave society. Among many technical challenges, achieving high-power terahertz radiation has been attracting many efforts. In this paper, we investigate the possibility of power synthesis at low-end frequencies of the terahertz gap based on discrete sources. We show that by applying precision digital phase control, such a power synthesis can be achieved, overcoming the difficulty of phase alignment at these frequencies. For demonstration, we implement a 110-GHz prototype system employing solid-state impact avalanche and transit time diodes. Using a simulation- and measurement-based design methodology, the impedance matching of the designed cavity is able to be simultaneously obtained at both the RF bias and the 110-GHz frequency without using any absorbing material. Detailed design, simulation, and measurement of the prototype are introduced and the experimental results comply well with analytical expectations. Analysis shows that with increased wide digital bit width, the proposed approach is able to provide sufficient phase control precision, making it possible to be used in the power synthesis applications at low terahertz frequencies.
AB - Terahertz technology is one of the research fronts in the microwave society. Among many technical challenges, achieving high-power terahertz radiation has been attracting many efforts. In this paper, we investigate the possibility of power synthesis at low-end frequencies of the terahertz gap based on discrete sources. We show that by applying precision digital phase control, such a power synthesis can be achieved, overcoming the difficulty of phase alignment at these frequencies. For demonstration, we implement a 110-GHz prototype system employing solid-state impact avalanche and transit time diodes. Using a simulation- and measurement-based design methodology, the impedance matching of the designed cavity is able to be simultaneously obtained at both the RF bias and the 110-GHz frequency without using any absorbing material. Detailed design, simulation, and measurement of the prototype are introduced and the experimental results comply well with analytical expectations. Analysis shows that with increased wide digital bit width, the proposed approach is able to provide sufficient phase control precision, making it possible to be used in the power synthesis applications at low terahertz frequencies.
KW - Phase control
KW - phase-locked loop (PLL)
KW - power synthesis
KW - terahertz
UR - http://www.scopus.com/inward/record.url?scp=85028229013&partnerID=8YFLogxK
U2 - 10.1109/TMTT.2015.2417856
DO - 10.1109/TMTT.2015.2417856
M3 - Article
AN - SCOPUS:85028229013
SN - 0018-9480
VL - 63
SP - 1633
EP - 1644
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
IS - 5
M1 - 7086105
ER -