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Electrically Small Antennas with Miniaturized Impedance Matching Circuits for Semiconductor Amplifiers(Active Circuits & Antenna, <Special Section>Recent Technologies of Microwave and Millimeter-Wave Devices Focusing on Miniaturization and Advancement in Performance with Their Applications)

  • YOSHIDA Keiji
    Department of Electronics, Graduate School of Information Science and Electrical Engineering, Kyushu University
  • TSUTSUMI Yukako
    Department of Electronics, Graduate School of Information Science and Electrical Engineering, Kyushu University
  • KANAYA Haruichi
    Department of Electronics, Graduate School of Information Science and Electrical Engineering, Kyushu University

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Abstract

In order to reduce the size of a wireless system, we propose a design theory for the broadband impedance matching circuit which connects an electrically small antenna (ESA) to a semiconductor amplifier. We confirmed its validity for the case of connection between a small slot loop antenna with a small radiation resistance of R_a=0.776Ω and a semiconductor amplifier with high input impedance of Z_L=321-j871Ω with the aid of the simulations by the electrical circuits using transmission lines as well as the electromagnetic field (EM field) simulator. We also made experiments on this antenna with matching circuits using high temperature superconductor YBCO thin films on MgO substrates.

Journal

  • IEICE transactions on electronics

    IEICE transactions on electronics 88 (7), 1368-1374, 2005-07-01

    The Institute of Electronics, Information and Communication Engineers

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Details

  • CRID
    1574231874996258048
  • NII Article ID
    10016778426
  • NII Book ID
    AA10826283
  • ISSN
    09168524
  • Text Lang
    en
  • Data Source
    • CiNii Articles

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