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http://dx.doi.org/10.5515/KJKIEES.2018.29.2.99

S-Band Solid State Power Oscillator for RF Heating  

Jang, Kwang-Ho (Department of Wireless Communications Engineering, Kwangwoon University)
Kim, Bo-Ki (Department of Wireless Communications Engineering, Kwangwoon University)
Choi, Jin-Joo (Department of Wireless Communications Engineering, Kwangwoon University)
Choi, Heung-Sik (LG Electronics)
Sim, Sung-Hun (LG Electronics)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.29, no.2, 2018 , pp. 99-108 More about this Journal
Abstract
This paper presents a design study of a solid state power oscillator to replace the conventional magnetron. The operational conditions of a single-stage 300 W LDMOS power amplifier were fully characterized. The power module consisted of two amplifiers connected in parallel. A delay-line feedback loop was designed for self-oscillation. A phase shifter was inserted in the delay-line feedback loop for adjusting the round-trip phase. Experiments performed using the power oscillator showed an output power of 800 W and a DC-RF conversion efficiency of 58 % at 2.327 GHz. The measured results were in good agreement with those predicted by numerical simulations.
Keywords
Magnetron Replacement; Microwave Oven; Power Oscillator; LDMOS;
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