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Article

Phased Array Antenna Calibration Based on Autocorrelation Algorithm

by
Xuan Luong Nguyen
1,
Nguyen Trong Nhan
2,*,
Thanh Thuy Dang Thi
1,
Tran Van Thanh
2,
Phung Bao Nguyen
3 and
Nguyen Duc Trien
2
1
Faculty of Physics, VNU University of Science, Ha Noi 100000, Vietnam
2
Air Defense-Air Force Technical Institute, 166 Hoang Van Thai, Ha Noi 11400, Vietnam
3
Department of Electronic Technology, Institute of System Integration, Le Quy Don Technical University, 236 Hoang Quoc Viet, Ha Noi 11917, Vietnam
*
Author to whom correspondence should be addressed.
Sensors 2024, 24(23), 7496; https://doi.org/10.3390/s24237496
Submission received: 1 November 2024 / Revised: 19 November 2024 / Accepted: 22 November 2024 / Published: 24 November 2024
(This article belongs to the Section Communications)

Abstract

The problem of calibrating phased array antennas in a noisy environment using an autocorrelation algorithm is investigated and a mathematical model of the autocorrelation calibration method is presented. The proposed calibration system is based on far-field scanning of the phased array antenna in an environment with internal noise and external interference. The proposed method is applied to a phased array antenna and compared with traditional rotating-element electric-field vector methods, which involve identifying the maximum and minimum vector–sum points (REVmax and REVmin, respectively). The proposed calibration system is verified for a phased array antenna at 3 GHz. Experimental verification of the mathematical model of the proposed method demonstrates that the autocorrelation method is more accurate than the rotating-element electric-field vector methods in determining the amplitude and phase shifts. The measured peak gain of the combined beam in the E-plane increased from 7.83 to 8.37 dB and 3.57 to 4.36 dB compared to the REVmax and REVmin methods, respectively, and the phase error improved from 47° to 55.48° and 19.43° to 29.16°, respectively. The proposed method can be considered an effective solution for large-scale phase calibration at both in-field and in-factory levels, even in the presence of external interference.
Keywords: phased array antenna; autocorrelation algorithm; far-field probe; amplitude error; phase error; radiation pattern phased array antenna; autocorrelation algorithm; far-field probe; amplitude error; phase error; radiation pattern

Share and Cite

MDPI and ACS Style

Nguyen, X.L.; Nhan, N.T.; Dang Thi, T.T.; Thanh, T.V.; Nguyen, P.B.; Trien, N.D. Phased Array Antenna Calibration Based on Autocorrelation Algorithm. Sensors 2024, 24, 7496. https://doi.org/10.3390/s24237496

AMA Style

Nguyen XL, Nhan NT, Dang Thi TT, Thanh TV, Nguyen PB, Trien ND. Phased Array Antenna Calibration Based on Autocorrelation Algorithm. Sensors. 2024; 24(23):7496. https://doi.org/10.3390/s24237496

Chicago/Turabian Style

Nguyen, Xuan Luong, Nguyen Trong Nhan, Thanh Thuy Dang Thi, Tran Van Thanh, Phung Bao Nguyen, and Nguyen Duc Trien. 2024. "Phased Array Antenna Calibration Based on Autocorrelation Algorithm" Sensors 24, no. 23: 7496. https://doi.org/10.3390/s24237496

APA Style

Nguyen, X. L., Nhan, N. T., Dang Thi, T. T., Thanh, T. V., Nguyen, P. B., & Trien, N. D. (2024). Phased Array Antenna Calibration Based on Autocorrelation Algorithm. Sensors, 24(23), 7496. https://doi.org/10.3390/s24237496

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