An experimental study of antenna array calibration

Abstract

ACKNOWLEDGMENTThe authors would like to thank V. Shkawrytko for his kind assistance in the preparation of this manuscript. REFERENCES An Experimental Study of Antenna Array CalibrationInder J. Gupta, James R. Baxter, Steven W. Ellingson, Hyung-Geun Park, Hyun Seo Oh, and Mun Geon KyeongAbstract-The coupling matrix concept for predicting the radiation patterns of elements of an antenna array is studied. Measured data, as well as some numerical data, are used in the study. It is demonstrated that for some practical antennas of interest whose radiation patterns are affected by structure scattering, the coupling matrix concept may not work very well. As expected, the stronger the structure scattering, the greater the discrepancy between the predicted patterns and the actual patterns.

Automated system for measurement and characterization of planar active arrays

“…Since from calibration requirements [8], [9] and [10] this test needs almost 5 frequency and 61 measurements per frequency to fulfill the selected calibration models, the anechoic chamber measurements (305) takes with the automated system more than 9 days of nonstop work. Thus, according to the exhaustive required measurement campaign, an efficient and scalable automated procedure depicted in Figure 4 has been implemented to minimize operative costs and time.…”

Intelligent z-plane boundary condition-particle swarm optimiser for small array pattern synthesis

“…All these approaches have limitations and lack of generality as they assume that an invertible mutual coupling matrix fully defines the coupling. For more complex elements or where a local structure may produce additional scattering, coupling matrix inversion may not be applicable and techniques based on active element patterns are considered more practical [19,20]. Also, the voltage -current relationship…”

Coupling compensation for unmatched circular arrays in high-frequency applications

“…high frequency (HF)], there is no practical way to circle around the array because a large space is required to place transmitters in the far-field positions. On the other hand, experimental results show that the coupling matrix is dependent on the angle of arrival, especially in the presence of structural scattering [11] and multipath effects [12]. Most of the deterministic methods that are based on calibration by pilot sources are location dependent.…”

“…Most of the proposed methods in this category assume that the coupling matrix is diagonal, Toeplitz and symmetric. However, experimental data show that coupling matrix is not symmetric and diagonal in real applications [11].…”