Phased Array Initial Phase Calibration via DC Offset Peak Detection
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Solution Overview
Problem
In phased array systems, ensuring all channels have the same initial phase is challenging due to manufacturing and environmental differences, leading to reduced beam forming performance.
Innovation Solution
A method for determining a target initial phase by acquiring and calculating voltage amplitudes of direct-current offset signals under different initial phases, identifying the phase at which the mixed direct-current offset signal reaches its maximum value as the target initial phase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional phase calibration methods are used, then phase calibration can be performed, but the calibration process is complex and accuracy is reduced
Solution Approach 1:
The patent extracts and removes the system direct-current offset signal from the total direct-current offset signal to obtain the mixed direct-current offset signal. This extraction approach simplifies the calibration process by focusing only on the relevant signal component, thereby improving measurement precision while reducing process complexity
Solution Approach 2:
The patent dynamically adjusts the initial phases of the N target channels and measures the voltage amplitudes of the mixed direct-current offset signal at different phase settings. By dynamically varying the phase parameters and identifying the maximum voltage amplitude point, the method achieves accurate phase calibration with a simplified dynamic measurement process
2Reliability
If manufacturing and environmental differences are not compensated, then system complexity is reduced, but beam forming performance deteriorates
Solution Approach 1:
The patent changes the initial phase parameters of the N target channels systematically to find the optimal phase setting. By adjusting the phase parameter and measuring the corresponding voltage amplitude of the mixed direct-current offset signal, the method compensates for manufacturing and environmental differences, thereby improving beam forming performance through parameter optimization
Data Source
AI summary
The present disclosure provides a method for determining a target initial phase, including: acquiring a voltage amplitude of a system direct-current offset signal of a phased array system corresponding to N target channels to be calibrated; respectively acquiring voltage amplitudes of a total direct-current offset signal under different initial phases; and calculating voltage amplitudes of a mixed direct-current offset signal of the N target channels under the different initial phases, and taking an initial phase of the N target channels, when the voltage amplitude of the mixed direct-current offset signal reaches the maximum value, as a target initial phase of the N target channels. The present disclosure further provides a phase calibration method, an apparatus for determining an initial phase, and an antenna system.