Phased Array Feed-Line Testing With Shielded Radiation Elements
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Solution Overview
Problem
The high cost and complexity of phased array antennas hinder their commercialization in satellite communication systems due to the need for precise phase control and accurate phase delay management.
Innovation Solution
A method and system for testing phased array antennas involving a substrate with feed lines and radiation elements, using shielding structures and conductive pads to facilitate easy and accurate phase calibration, reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If phased array antenna technology is adopted for satellite communications to improve power efficiency and transmission distance, then communication performance is improved, but manufacturing cost increases due to the need for precise phase control and accurate phase delay management
Solution Approach 1:
The patent applies preliminary action by implementing phase calibration before the antenna array is deployed or put into service. A calibration process is performed in advance to adjust and compensate for phase delays in individual antenna elements, ensuring accurate beamforming and signal transmission. This preliminary calibration step allows the system to achieve precise phase control without requiring expensive high-precision manufacturing tolerances during production.
2Length of moving object
If phased array antenna technology is adopted for satellite communications to improve transmission distance, then communication performance is improved, but device complexity increases due to the need for precise phase control
Solution Approach 1:
The patent implements feedback mechanisms through calibration processes that continuously monitor and adjust phase delays in the antenna array. Measurement and control circuits are used to detect phase errors and provide feedback for correction, enabling the system to maintain accurate beamforming over long transmission distances. This feedback approach simplifies the overall system by allowing software-based adjustment rather than requiring complex hardware phase control circuits for each antenna element.
3Measurement precision
If conventional testing methods are used for phased array antennas, then phase calibration can be performed, but the process is time-consuming and costly
Solution Approach 1:
The patent uses a signal generator and measurement instrument to create simulated signal copies that replicate the expected electromagnetic field patterns. By comparing actual antenna output signals with these predetermined signal copies or reference patterns, the system can quickly identify and correct phase calibration errors without requiring lengthy real-world transmission tests. This copying approach enables rapid verification of phase accuracy using laboratory equipment rather than extended field testing.
Data Source
AI summary
A method for testing an antenna device includes: providing the antenna device including: a first signal port and a second signal port arranged in a first layer over a first surface of a substrate of the antenna device; a first feed line and a second feed line arranged in the first layer and connected to the first signal port and the second signal port, respectively; and a radiation element disposed in a second layer on a second surface of the substrate opposite to the first surface; providing a first testing signal and a second testing signal to the first signal port and the second signal port, respectively; shielding the radiation element from radiating the first and second testing signals; and receiving a first output signal and a second output signal from the first feed line and the second feed line, respectively.