Radar Receiver Phase Calibration for Single-Target Angle Accuracy

The patent transitions from static factory calibration to dynamic online calibration. The system continuously monitors phase differences during operation and automatically recalibrates when deviations exceed thresholds, making the calibration adaptive to changing thermal and operational conditions rather than fixed at factory settings.

The patent implements a feedback mechanism where phase differences are continuously measured and compared against calibration thresholds. When phase deviations exceed predefined limits, the system triggers automatic recalibration routines, creating a closed-loop control system that maintains calibration accuracy throughout the radar's operational life.

The system dynamically adjusts calibration parameters for each high-frequency component based on real-time temperature monitoring and phase difference measurements, allowing each component to maintain optimal calibration despite individual thermal variations.

The patent changes calibration parameters (phase offsets, timing adjustments) based on measured temperature variations and phase deviations, allowing the system to compensate for thermal effects on multiple high-frequency components and maintain coherent phase relationships across the array.

The radar system performs self-calibration using its own operational signals and built-in phase measurement capabilities. The calibration function is integrated into the normal signal processing path, eliminating the need for external calibration equipment or separate calibration hardware modules.

The system uses discarded or unused signal components (such as direct path signals or known reference echoes) for calibration purposes, recovering useful calibration information from signals that would otherwise be filtered out or ignored during normal target detection operations.