PORTABLE SPHERICDAL NEAR-FIELD ANTENNA MEASUREMENT SYSTEM

摘要

portable near-field measurement system (1) is provided for mapping the radio frequency characteristics of the test object in a spherical shape. Such portable near-field measurement system (1) comprises an anechoic chamber 2, an annular rotary platter (21), a rotary platter (17), a fixed platform 46, and a frequency converter (29, 45). The anechoic chamber (2) is an enclosure with a fixed absorber material therein. The annular platter 21 is secured to the azimuth positioner 37 which is arranged horizontally in the anechoic chamber 2, an annular rotating platter 21 for rotating the bearing shaft (24). The rotary platter (17) is rotatable about the rising rotation shaft 25 disposed vertically within the anechoic chamber (2) is raised through the positioner (28). Orientation and rise shaft (24, 25) intersect the vertical. Probe 20 by the gantry arm 19 is fixed to the rotary having a platter (17) extends from the rotary platter. Vertical arm 66 is fixed between the ring-shaped platter 21 and the rising positioner 28. Platters (17, 21) are equipped to the front and rear (26, 27). A fixed platform 46 is focused in the center of the ring-shaped platter 21 can be attached to a test column (16, 22). The front 26 is directed towards a test column (16, 22) and is covered by absorber material (18). At least one frequency converter (29) is fixed to the back 27 of the rotary platter (21) and can communicate with the probe 20. At least one other frequency converter (45) is capable of being fixed communication with the target (36) to the fixed platform (46). ;