120-W Ku-Band GaN SSPA with Diode Linearizer for Future Broadcasting Satellites

DOI Web Site 14 References Open Access
  • NAGASAKA Masafumi
    NHK Science & Technology Research Laboratories, Japan Broadcasting Corporation
  • KOJIMA Masaaki
    NHK Science & Technology Research Laboratories, Japan Broadcasting Corporation
  • TORII Takuma
    Mitsubishi Electric Corporation, Information Technology R&D Center
  • UTSUMI Hiromitsu
    Mitsubishi Electric Corporation, High Frequency & Optical Device Works
  • YAMANAKA Koji
    Mitsubishi Electric Corporation, High Frequency & Optical Device Works
  • SHINJO Shintaro
    Mitsubishi Electric Corporation, Information Technology R&D Center
  • SHIMOZAWA Mitsuhiro
    Mitsubishi Electric Corporation, Information Technology R&D Center
  • SUJIKAI Hisashi
    NHK Science & Technology Research Laboratories, Japan Broadcasting Corporation

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Description

<p>Satellite broadcasting of 4K/8K ultra-high definition television (UHDTV) was launched in Japan in December 2018. Because this system uses the amplitude and phase shift keying (APSK) modulation scheme, there is a need to improve the non-linear characteristics of the satellite transponders. To meet this requirement, we have been developing a 120-W-class Ku-band solid state power amplifier (SSPA) as a replacement for the currently used traveling wave tube amplifier (TWTA). In this study, we developed a gallium-nitride (GaN) SSPA and linearizer (LNZ). The SSPA achieved an output power of 120W while maintaining a power added efficiency (PAE) of 31%. We evaluated the transmission performance of 16APSK in this SSPA channel in comparison with that in the TWTA channel.</p>

Journal

  • IEICE Transactions on Electronics

    IEICE Transactions on Electronics E102.C (10), 717-724, 2019-10-01

    The Institute of Electronics, Information and Communication Engineers

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