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Residual Noise Identification for PIM Measurement Systems using Variable Low-PIM Termination
  • Masayoshi Kuwata ,
  • Tamon Yamashita ,
  • Nobuhiro kuga
Masayoshi Kuwata
Yokohama National University

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Tamon Yamashita
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Nobuhiro kuga
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In this letter, we describe the design for the variable low-PIM termination composed of the voltage-controlled IM-source, a fixed attenuator, and a linear attenuator. The design method for evaluating PIM-level of the fixed attenuator is presented in order not to limit the variable range of entire termination. It is possible to maintain low-PIM performance in spite of using active voltage-controlled IM-source, whose IM level is extremely high. This termination is used for a dynamic residual noise identification for PIM measurement systems by observing the saturation value for voltage sweep. The validity is confirmed by experiments in 2GHz band.
01 Dec 2022Published in IEICE Communications Express volume 11 issue 12 on pages 772-777. 10.1587/comex.2022COL0030