Hardware-Timed Antenna Characterization for IC Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for testing integrated circuits with integrated antennas are slow and expensive due to the need for precise orientation and power/frequency testing of antennas, which requires complex and time-consuming calibration processes.
Innovation Solution
A hardware-timed over-the-air antenna characterization system that uses a deterministic closed loop between the measurement system and the motion of the antenna under test, employing a quadrature encoder and direct hardware signaling to synchronize orientation and measurement acquisition, allowing continuous transition through orientations without halting, thereby reducing latency and test time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If software-timed measurement acquisition is used to control antenna orientation and measurement timing, then the system is easier to implement and control, but software-induced latency increases test time and reduces measurement speed
Solution Approach 1:
The patent replaces the software-timed measurement system with a hardware-timed system using field-programmable gate array (FPGA) logic. The FPGA directly processes encoder signals from the antenna position sensors and generates measurement triggers based on hardware timing, eliminating the software latency chain while maintaining controllable measurement sequences. This substitution of software control with hardware logic timing resolves the contradiction by providing both ease of control through programmable logic and reduced test time through elimination of software-induced delays.
2Productivity
If the antenna under test is continuously transitioned through orientations without halting, then test time is reduced and productivity increases, but synchronization between position and measurement becomes more difficult
Solution Approach 1:
The patent implements a feedback mechanism where the FPGA continuously monitors encoder signals from the antenna position sensors during continuous motion. The hardware timing logic processes the encoder pulses in real-time and generates measurement triggers synchronized to the actual antenna position, even during continuous transition. This feedback-based hardware synchronization resolves the contradiction by maintaining precise position-measurement correlation without requiring motion halts, thereby preserving both test speed and measurement precision.
3Measurement precision
If complex calibration processes are performed for precise antenna orientation and power/frequency testing, then measurement accuracy is improved, but device complexity and test time increase
Solution Approach 1:
The patent implements a self-calibrating measurement system where the FPGA-based hardware timing automatically correlates antenna position with measurement data without requiring external calibration procedures. The system self-synchronizes by directly processing encoder signals and generating measurement triggers based on actual hardware timing, eliminating the need for complex external calibration equipment and procedures. This self-service approach maintains measurement precision while reducing device complexity and test time.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Antenna characterization systems and methods are described for hardware-timed testing of integrated circuits (IC) with integrated antennas configured for over-the-air transmission and/or reception. An IC to be tested (e.g., the device under test (DUT)) may be mounted to an adjustable positioner in an anechoic chamber. Radio frequency (RF) characteristics (e.g., including transmission characteristics, reception characteristics, and/or beamforming characteristics) of the IC may be tested over-the-air using an array of antennas or probes within the anechoic chamber while continually transitioning the adjustable positioner through a plurality of orientations. Counters and reference trigger intelligence may be employed to correlate measurement results with orientations of the DUT.