Antenna Test Chamber with Movable Carriage

The patent implements a movable carriage system that enables dynamic adjustment of antenna positions along rails within the measurement chamber. This dynamic positioning system allows the distance between transmitting and receiving antennas to be varied continuously, eliminating the need for manual absorber conversions when changing measurement frequencies. The carriage can be repositioned quickly to optimal distances for different frequency ranges while maintaining complete absorber lining coverage.

The measurement chamber is designed with a universal carriage system that can accommodate multiple antenna types and configurations on a single platform. The carriage structure with rails and movable carriers creates a multi-functional system that handles both high-frequency measurements requiring large antenna separations and low-frequency measurements requiring smaller separations, all within the same chamber configuration with complete absorber lining.

The patent divides the measurement chamber floor into two levels: a lower level with rails for carriage movement and an upper level where absorbers are positioned. This segmentation allows the absorber lining to remain complete on the upper surface for measurement accuracy while the lower level provides accessible rail infrastructure for easy carriage repositioning without requiring absorber removal or manual conversions.

The movable carriage acts as an intermediary between the operator and the measurement system. Instead of requiring direct manual access to adjust absorbers or antenna positions, the operator controls the carriage movement along the rails, which in turn positions the antennas optimally for different frequency measurements. This intermediary system maintains complete absorber coverage while simplifying operation.

The patent implements adaptability across a broad frequency spectrum by enabling continuous change of the antenna separation distance parameter. The movable carriage system allows the distance between transmitting and receiving antennas to be adjusted according to the specific measurement frequency requirements, optimizing the far-field condition (r > 2D²/λ) for each frequency without requiring physical chamber modifications.

The patent replaces complex manual mechanical conversion systems (removing and reattaching absorbers) with a simpler rail-based carriage movement system. Instead of requiring operators to manually disassemble and reconfigure the absorber lining for different frequencies, the system uses guided linear movement of carriages along fixed rails, significantly reducing mechanical complexity while maintaining full adaptability.