Temperature test apparatus and temperature test method

A temperature test method using a temperature test apparatus including

• an anechoic box,
• a heat insulating housing that is accommodated in the anechoic box,
• a temperature control device that controls a temperature in the heat insulating housing,
• a ventilation block that is made of metal and provided to block an opening formed in an outer surface plate of the anechoic box, and in which a plurality of through-holes that penetrate from one end surface to the other end surface are formed,
• a first cover that is provided on an outer side of the anechoic box to cover the one end surface of the ventilation block, and form a first space with the ventilation block, and includes a first communication hole for causing the first space to communicate with an outside of the anechoic box or an external pipe, and
• a second cover that is provided on an inner side of the anechoic box to cover the other end surface of the ventilation block, and form a second space with the ventilation block, and includes a second communication hole for causing the second space to communicate with an inside of the heat insulating housing or an internal pipe,
• in which the through-hole of the ventilation block has a size that causes a gas having a temperature controlled by the temperature control device or a gas in the heat insulating housing to pass through and causes at least a test radio wave used in the anechoic box not to pass through, the method comprising:
• a temperature control step of controlling the temperature in the heat insulating housing to a plurality of predetermined temperatures;
• a posture changeable step of sequentially changing a posture of a device under test disposed in the heat insulating housing;
• and
• a measurement step of measuring transmission characteristics or reception characteristics of the device under test each time the posture of the device under test is changed by the posture changeable step in a state where the temperature in the heat insulating housing is controlled by the temperature control step.