Multi-axis antenna test equipment for mmWave calibration
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Solution Overview
Problem
Testing millimeter-wave (mmWave) or Terahertz (THz)-frequency antennas in various configurations or orientations is challenging due to the need for precise calibration of phase arrays, and existing methods face difficulties in accurately measuring radiated power distribution and minimizing signal loss during rotation.
Innovation Solution
A testing apparatus that rotates the antenna around three axes (Azimuth, Elevation, and Polarization) with a modular design, using smart actuators and passthrough holes for signal continuity, and non-reflective materials to minimize interference, allowing for precise measurement and calibration of radiation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the antenna is rotated to test various orientations, then the measurement coverage is improved, but signal loss increases
Solution Approach 1:
The patent introduces a turntable as an intermediary device between the antenna and the measurement system. The turntable rotates the antenna precisely around a fixed point without requiring the entire measurement system to move, thereby maintaining stable signal transmission and reception while achieving multi-directional measurement coverage.
Solution Approach 2:
The measurement system is segmented into a stationary measurement apparatus and a rotating turntable platform. This segmentation allows the antenna to be rotated for different orientations while the measurement system remains fixed, preventing signal loss that would occur if the entire system were moved.
2Reliability
If a fixed measurement point is used, then signal transmission is stable, but the antenna cannot be tested in various orientations
Solution Approach 1:
Instead of moving the measurement system to different positions to test various orientations (which would cause signal instability), the patent inverts the approach by keeping the measurement system fixed and rotating the antenna on a turntable. This inversion maintains signal stability while achieving the same testing objective.
Solution Approach 2:
The turntable serves as an intermediary that enables orientation variation without moving the measurement system. It mediates between the fixed measurement point and the rotating antenna, allowing the antenna to be tested in multiple orientations while maintaining stable signal transmission.
3Measurement precision
If the antenna is rotated around multiple axes, then the calibration accuracy is improved, but the device complexity increases
Solution Approach 1:
The rotation mechanism is segmented into three independent rotational components: the turntable for azimuth rotation, the arm for elevation rotation, and the platform for polarization rotation. Each component handles one axis of rotation independently, making the complex multi-axis calibration achievable through modular, manageable segments rather than a single complex mechanism.
Data Source
AI summary
Embodiments herein relate to a testing apparatus for coupling with a device-under-test (DUT). The apparatus may include a base portion configured to couple to a testing platform, wherein the base portion is configured to rotate the DUT around a first axis. The apparatus may further include an arm portion configured to rotate the DUT around a second axis perpendicular to the first axis. The apparatus may further include a platform portion configured to couple to the DUT. Other embodiments may be described and claimed.