Test and calibration device which is intended to carry out test and calibration operations of an active antenna in a zone in which the antenna pattern is not yet formed comprising a radar which is provided with an active antenna, the test device comprising the active antenna, the antenna being constituted by a plurality of active emission/reception elements which are arranged in order to form a radiating surface, the device comprising: - a measuring chamber which is configured to be mounted facing the radiating face of the antenna on the structure supporting the antenna and in which there is positioned at least one test probe which is capable of capturing and radiating hyperfrequency electromagnetic signals, - means for generating a hyperfrequency radioelectric test signal and means for carrying out the reception of a hyperfrequency radioelectric signal and carrying out a vector measurement of the signal received; the measuring chamber comprising: - a wall which forms a cavity which is provided with an opening, the opening being configured so that the cavity is blocked by the radiating face of the antenna when the chamber is mounted on the structure supporting the antenna; - means enabling the test probe to be positioned inside the cavity at a specific position; - fixing means which enable the measuring chamber to be mounted on the structure which supports the antenna, these means being configured in order to ensure, after assembly, a known axial positioning of the measuring chamber relative to the radiating face of the antenna; the wall forming the cavity being covered on the inner face thereof with elements which absorb the radioelectric waves, the outer face thereof being configured in order to form an electric shielding; the device comprising a plurality of probes and further being characterised in that, taking into account the depth D2 of the cavity defined by the measuring chamber and the dimensions of the pattern of the test probe used, the measuring chamber comprises a plurality of test probes (41, 42), each probe being mounted on a means which enables it to be positioned inside the cavity in a known position, the number of test probes and the position of each of these probes being defined so that the combination of their radiation patterns covers all of the active surface of the antenna and each of the probes (41, 42) is illuminated by the main lobe of the radiation pattern of one or more active elements, or active sub-networks, constituting the antenna, the dimensions of the measuring chamber being determined so that, taking into account the at least one position of each probe in the cavity, the distance of the probe from each of the active elements or sub-network of active elements which constitute the antenna is greater than d 2 /2λ, d representing the size of the equivalent radiating opening of an active element of the antenna or a sub-network which is constituted by active elements and λ the mean operation wavelength of the antenna. - a measuring chamber which is configured to be mounted facing the radiating face of the antenna on the structure supporting the antenna and in which there is positioned at least one test probe which is capable of capturing and radiating hyperfrequency electromagnetic signals, - means for generating a hyperfrequency radioelectric test signal and means for carrying out the reception of a hyperfrequency radioelectric signal and carrying out a vector measurement of the signal received; - a wall which forms a cavity which is provided with an opening, the opening being configured so that the cavity is blocked by the radiating face of the antenna when the chamber is mounted on the structure supporting the antenna; - means enabling the test probe to be positioned inside the cavity at a specific position; - fixing means which enable the measuring chamber to be mounted on the structure which supports the antenna, these means being configured in order to ensure, after assembly, a known axial positioning of the measuring chamber relative to the radiating face of the antenna; the wall forming the cavity being covered on the inner face thereof with elements which absorb the radioelectric waves, the outer face thereof being configured in order to form an electric shielding;