| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-frequency characteristic measuring instrument which enables measurement of high accuracy, without having to use a waveguide pipe that has a special shape, even when the orientation characteristics of a sample are measured by making a sampling region small, by enhancement in the frequency of the measurement frequency in order to enhance measurement accuracy. SOLUTION: In the high-frequency characteristic measuring instrument utilizing a microwave cavity resonator, opening plates, respectively having openings different in size are arranged on the sides of the microwave introducing part and microwave detection part in the waveguide pipe. The shape of the openings is circular, when the dimension of the short side of the rectangular cross section of the waveguide pipe is (a); and the diameter of the larger opening is (c), where c/a is (c/a)<0.7. When the diameter of the smaller opening is (b), c/b is (c/b)<5. Furthermore, formulae (b/a)>0.1 and (b+c)/a>0.4 hold. COPYRIGHT: (C)2009,JPO&INPIT
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