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The beam pattern of an antenna array is one of the most important characteristics of classical phased arrays and of more modern smart antenna, digital beamforming and multiple-input multiple-output array systems. Most approaches to designing such systems are based on an ideal mathematical model, which leads to an ideal beam pattern. However calibration errors and mutual coupling are real-world effects...
Calibration is an important topic in MIMO radar and phased array systems. Variations of the gains and phases of RF components as well as mutual coupling are prominent examples of error sources in such systems. Different measurement-based calibration procedures have been developed to tackle these problems. Most of them rely on well-defined calibration measurement scenarios. In this paper we present...
The design of a delay-and-sum beamformer based on measured data is presented in this paper. Traditionally the weighting of a delay-and-sum beamformer is designed based on an idealized signal model, with specifications on the beam pattern in terms of the beam width and the sidelobe level (SLL). The goal is a trade-off between resolution and the ability to detect targets with a certain dynamic range...
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