Author
Kim Do-kyun
Issues
Daejeon University of Science and Technology Graduate School, 2020
Degree thesis matters
Thesis (Master's)-- University of Science and Technology Graduate School : Energy and Power Conversion Engineering 2020.
Year of issue
2020
writing language Korean
ABSTRACT
Space solar power system (SSPS) requires to transfer
electrical energy from space to the Earth. For this purpose,
long-range wireless power transfer technology based on
microwave phased array has been studied. The unit device for
phased array system must have high energy conversion
efficiency per volume. Magnetron based on vacuum electronics
can be an optimal device that meets this requirement.
Magnetron has higher DC-RF conversion efficiency than solid
state devices have. But it suffers from frequency and phase
noise so that it has limitations to using it as a unit device for a
phased array system. In this paper, stabilization & control of 2.45
GHz Magnetron’s frequency and phase are reported. In order to
stabilize the Magnetron oscillation frequency, we designed a high
voltage filter for Magnetron power supply (SM445). Then we
applied injection locking technique to control Magnetron’s
frequency. A phase locking loop (PLL) is constructed for more
precise phase stabilization.
Phase stability of 0.3° is achieved by PLL based on injection
locking technique. We expect our accomplishment can contribute
to microwave-based phased array wireless power transfer.
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