研究目的
To measure and calibrate the amplitude and phase of phased array antenna to meet the optimum design results.
研究成果
The proposed amplitude-phase measurement method based on self-calibration RF channel and the mid-field receive power calculating method is feasible and efficient for phased array antenna with high precision. It offers advantages of simple measuring equipment, simple measuring environment, and high measuring accuracy.
研究不足
The method's accuracy is dependent on the precision of the self-calibration RF channel and the mid-field receiving power calculation method. Potential areas for optimization include the calibration process and the calculation method.
1：Experimental Design and Method Selection:
The method involves measuring the initial amplitude-phase by self-calibration RF channel, achieving the modified value related to self-calibration RF channel by Mid-field receiving power calculation method, and obtaining the actual amplitude and phase weighting factor of phased array antenna.
2：Sample Selection and Data Sources:
The phased array antenna with 320 antennas in a two-dimensional plane triangle grid distribution array is used.
3：List of Experimental Equipment and Materials:
Self-calibration RF channel, calibration antenna, calibration module, coupler, coaxial cable, and vector network analyzer (VNA).
4：Experimental Procedures and Operational Workflow:
Initial amplitude and phase properties between each radiating element and the self-calibration channel are measured by VNA. The transmit and receiving amplitude and phased calibration value are calculated.
5：Data Analysis Methods:
The transmit amplitude and phase are calculated using the initial transmit amplitude and phase value, compared with the calculated transmit amplitude and phased calibration value. The receiving amplitude and phase are calculated similarly.
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