主权项 |
1. A portable near-field antenna measurement system comprising:
(a) an anechoic chamber; (b) a rotatable annular platter disposed substantially horizontal within said anechoic chamber, said rotatable annular platter has an opening along an azimuth rotation axis, said rotatable annular platter attached to an azimuth positioner which rotates said rotatable annular platter about said azimuth rotation axis; (c) a rotatable platter disposed substantially vertical within said anechoic chamber, said rotatable platter attached to an elevation positioner which rotates said rotatable platter about an elevation rotation axis, said elevation rotation axis intersects and substantially perpendicular to said azimuth rotation axis, a gantry arm attached to and extends from said rotatable platter, a probe attached to said gantry arm, a vertical arm attached at a first end to said rotatable annular platter and at a second end to said elevation positioner, said rotatable annular platter and said rotatable platter each having a front surface and a back surface; (d) a stationary platform disposed within said opening and aligned with said rotatable annular platter, said stationary platform attachable to a test column, said test column attachable to a target, said front surfaces oriented toward said test column and covered with an absorber material; and (e) at least two frequency converters, at least one said frequency converter attached to said back surface along said rotatable platter and communicable with said probe, at least one other said frequency converter attached to said stationary platform opposite of said test column and communicable with said target. |