High-efficiency long-distance wireless power transfer using BaO and GaN magnetron's cathode

Document Type

Article

Publication Date

7-1-2022

Abstract

A magnetron is one of the most common microwave power generators used in commercial or industrial applications. There are a few methods for optimizing the magnetron to enhance its efficiency, which include the selection of the building materials, increasing the resonant cavity, enlarging operation space size, and modifying the anode structure. This article proposes the modification of magnetron cathode for high-frequency and low-power applications using gallium nitride (GaN)-coated cathode replacing the current barium oxide (BaO) coat. The highlighted optimization is intended to modify the control of magnetron electron drift velocity, heat dissipation, operation frequency, and power generation. Simulation and experimental results have been extracted at 2.45 GHz to generate 5 W microwave power and tested for over 30 ft. of power transmission using a rectenna interface, which results in an efficiency of 88.37%, compared with 51.8% using BaO coat.

Keywords

Magnetic resonance, Cathodes, Electromagnetic heating, Heating systems, Microwave theory and techniques, Magnetomechanical effects, Microwave oscillators, Cathodes, Energy conversion, Magnetrons, Microwave power transmission, Semiconductor materials

Publication Title

IEEE Transactions on Industry Applications

Divisions

fac_eng

Funders

Ministry of Education, Malaysia,Universiti Malaya [IF071-2020] [RK002-2021]

Volume

58

Issue

4

Publisher

Institute of Electrical and Electronics Engineers

Publisher Location

445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA

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