| 摘要 |
PROBLEM TO BE SOLVED: To easily adjust a phase for every necessary phase rotation amount, in accordance with specification of a transistor for high frequency as a device to be measured, without preparing a large number of lines for phase adjustment, and permit proper measurement regarding a transistor for high frequency which has low impedance, even in the case that VSWR(voltage standing-wave ratio) of a triplexer is inferior, or the triplexer has damage. SOLUTION: The tuner for load-pull measurement or source-pull measurement is provided with a tuner main body 14 constituted of a rod-shaped center conductor 14a, a ground conductor 14b and a large number of metal chips 14c which are movable in the direction perpendicular to the center conductor 14a, an impedance converting part 12 constituted of a rod-shaped conductor 12a whose thickness is different form that of the center conductor 14a, an external conductor 12b and a metal chip 12c which is movable in the directions perpendicular and parallel to the conductor 12a, and a rod-shaped converting conductor 13 connecting smoothly one end of the conductor 12a with one end of the center conductor 14a. The VSWR of an arbitrary phase can be increased to the impedance viewed from a transistor for high frequency, the side of turner main body 14 by the impedance converting part 12.
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