PURPOSE: To measure the characteristics of a radio wave absorber at a wider frequency band by constituting the jig of a shield type strip line comprising an outer conductor whose cross section is rectangular and an inner conductor, substantially a strip conductor, which is composed of an inner conductor with a planer strip conductor and a strip conductor orthogonal thereto.
CONSTITUTION: An inner conductor is formed of a planer strip conductor and a strip conductor or plural strip conductors with the same width orthogonal thereto. For example, the inner size of the outer conductor 1 is square whose side is 1.22mm and the strip conductor 2 is formed with conductor plates whose thickness is 0.3mm and whose width is 1m orthogonal in the middle. Areas formed by faces of the strip conductors 2 orthogonal to each other and wall faces of the outer conductor are square. That is, other strip conductor is provided to the center of the wide strip conductor orthogonal to each other to suppress the TE10 mode. Thus, the measurement at the frequency band in which the TE10 mode is propagated is attained and the upper limit frequency in the measurement can be set higher.
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TOGAWA HITOSHI
HATAKEYAMA KENICHI
TOKIN CORP