Yin, Chuan
Yan, Leibing
Funding for this research was provided by:
Doctoral Research Fund of Henan Institute of Technology (KQ1852)
National Natural Science Foundation of China under grant numbers (61801153)
State Key Laboratory of Millimeter Waves under grant numbers (K202012)
Natural Science Foundation of Zhejiang Province (LQY20F010001)
Article History
Received: 21 December 2019
Accepted: 6 March 2020
First Online: 20 April 2020
Competing interests
: The authors declare that they have no competing interests.