Meaning
Automated mechanical arm provides the high precision needed for mapping electromagnetic fields around a wireless device. Integration of a robotic scanner into a SAR test system allows for repeatable and accurate probe positioning. The arm moves through a series of programmed coordinates to capture data in three dimensions.
Mechanical Accuracy
Stepper motors and high-resolution encoders ensure that the probe is placed within fractions of a millimeter of the target location. A robotic scanner must maintain this precision even when moving at high speeds to reduce total test time. Specialized materials are used in the construction to minimize reflections that could interfere with the sensitive radio measurements.
Path Planning
Software controlling the arm calculates the most efficient route to cover the entire measurement volume. The robotic scanner follows a grid pattern for area scans and a more dense cluster for zoom scans at the peak absorption points. Collision avoidance algorithms prevent the probe from hitting the phantom surface or the device under test.
Data Synchronization
Position information is transmitted to the acquisition system in real time as each reading is taken. This link between the robotic scanner and the field sensor ensures that every data point is correctly mapped to its spatial coordinates.
