Electromagnetic wave shield box

An electromagnetic wave shield box including a casing body portion in which a device under test having an antenna on one surface and performs communication using a radio signal in a millimeter wave band is able to be installed, and a coupling antenna having a flat antenna surface and spatially coupled to the antenna, in the casing body portion, the electromagnetic wave shield box shielding penetration of electromagnetic waves from the outside, the electromagnetic wave shield box comprising:

• a coupling antenna holding portion that arranges a plurality of the coupling antennas annularly so that the antenna surfaces are directed to a center side of a ring and holds the coupling antennas;
• a fixing portion that fixes the coupling antenna holding portion to a bottom surface of the casing body portion;
• and
• a device-under-test holding portion that horizontally holds the device under test so that the one surface is directed to the coupling antenna, at a position spaced from the coupling antenna above the coupling antenna,
• wherein the coupling antenna holding portion holds each coupling antenna in a posture in which the coupling antennas are inclined in the same way by a first angle with respect to a horizontal surface so that the coupling antennas are able to radiate radio waves to the device under test at the respective upper positions, a bottom angle of an isosceles triangle is set to the first angle, the ring is set to a bottom surface, a segment connecting an apex of a cone extending in the horizontal surface to a center of the coupling antenna is set to a rotation axis, and each coupling antenna is rotated by a second angle.