Patent ID: 8330110

Claim:
A container that contains at least a part of a device under test to be measured by an electromagnetic wave measurement device, comprising: a gap portion that internally receives at least a part of the device under test; and an enclosure portion that comprises a first flat surface portion and a second flat surface portion, and the gap portion is positioned between the first flat surface portion and the second flat surface portion, whereby the enclosure portion encloses the gap portion, wherein: n2 can be adjusted such that: n 1−0.1 ≦n 2 ≦n 1+0.1 where n2 denotes a refractive index of the enclosure portion and n1 denotes a refractive index of the device under test; and the electromagnetic wave measurement device outputs an electromagnetic wave having a frequency equal to or more than 0.01 THz and equal to or less than 100 THz toward the device under test, wherein the refractive index of the enclosure portion can be adjusted by changing a thickness of the enclosure portion.