Phased Array Radar Calibration for Fast Space Object Tracking
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Solution Overview
Problem
Existing radar systems for tracking space objects are technologically disadvantaged due to large size, technological complexity, and high financial costs, as well as limitations in tracking rates, mechanical steering, and beaming abilities.
Innovation Solution
The development of radar calibration technologies using elemental antennas embedded in housings or mounted on reflectors, and the implementation of 1D phased array radar sites with multiple antenna arrays for precise signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 2D phased array radars are used to track space objects, then tracking capability is achieved, but the system suffers from large size, technological complexity, and high financial costs
Solution Approach 1:
The patent divides the radar system into multiple independent 1D phased array modules, each capable of tracking in a specific dimension. These modular units can be independently calibrated and assembled, reducing overall system complexity while maintaining tracking capability through coordinated operation of the segmented arrays.
Solution Approach 2:
The patent combines multiple 1D phased array modules to achieve 2D or 3D tracking capability. By merging simpler 1D arrays rather than using a complex 2D array from the start, the system achieves the required tracking capability with reduced individual module complexity and easier calibration procedures.
2Device complexity
If steerable dish radars are used to overcome technological disadvantages, then size and complexity are reduced, but tracking rates decrease and mechanical steering limitations arise
Solution Approach 1:
The patent replaces mechanical steering systems with electronic phase control in phased array modules. This substitution eliminates mechanical inertia and friction limitations, enabling rapid beam steering and high tracking rates while maintaining reduced system complexity through the use of simpler 1D arrays instead of large steerable dishes.
3Measurement precision
If phased array antennas are calibrated using traditional methods, then calibration accuracy may be insufficient, but calibration time and operational disruption increase
Solution Approach 1:
The patent implements preliminary calibration procedures where phase correction values are determined in advance using reference signals and stored for rapid application. This preliminary calibration action reduces the time required during operational calibration by pre-establishing correction parameters that can be quickly applied without extensive real-time measurements.
Solution Approach 2:
The patent employs feedback mechanisms where the radar system continuously monitors its own performance and automatically adjusts phase corrections based on measured deviations. This closed-loop feedback enables rapid iterative calibration with high accuracy while minimizing operational disruption through automated real-time adjustments.
Data Source
AI summary
Some of such technologies enable a technique for calibrating a radar based on using—A—an elemental antenna, which can be embedded on a housing hosting a set of antenna elements, or—B—an antenna mounted to a reflector (108). Some of such technologies enable a radar site containing a first ID phased array (112) and a second ID phased array (112), where the first ID phased array sends a set of signals and receives a set of reflections based on the set of signals, and the second ID phased array receives the set of reflections.