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http://dx.doi.org/10.5515/KJKIEES.2017.28.4.286

Development of Wideband Spatial Combined High Power Amplifier  

Lee, Ho-Seon (RFcore Co., Ltd.)
Park, Kwan-Young (RFcore Co., Ltd.)
Kong, Tong-Ook (RFcore Co., Ltd.)
Chun, Jong-Hoon (RFcore Co., Ltd.)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.28, no.4, 2017 , pp. 286-297 More about this Journal
Abstract
This paper is a study of 6~18 GHz wideband high power amplifier which is composed of 10 single amplifier and coaxial type spatial power combiner. The property of this spatial power combiner is on a similar principle to antipodal antenna radiation mechanism. Therefore, the key structure of proposed spatial power combiner is the antipodal finline PCB board and the finline curve shape is numerically synthesized by using Klopfensein's optimum impedance taper. The measured CW output power of spatial combined high power amplifier is nearly 50 W. In conclusion we prove the good combining performance between the spatial power combiner and 10 single amplifier over 6~18 GHz frequency ranges. Also, we developed the key component PA and MFC MMIC which controls the phase and gain of the each amplifier, The main characteristic of MFC MMIC is to maximize combining efficiency of power amplifier.
Keywords
Coaxial Type Spatial Power Combiner; High Power Amplifier; MFC; Wideband;
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