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Phased Array Feed (PAF) systems are installed on the Westerbork dishes, enabling new science for the astronomical community. Twelve dishes are equipped with PAF system hardware, and the central processing systems are in place too. The PAFs need a dedicated calibration scheme in order to satisfy stability requirements. The verification process has finished for most system elements, and the first validation...
In this paper, a test bed for LTE-Advance Beamforming is proposed. The test bed is composed of an 8×1 monopole antenna array matched at the mid and higher bands for LTE operating in Europe, wide band transceivers with agile architectures provided by Analog Devices, and mid range FPGA from Xilinx for antenna weight calculation and beamforming on the fly. The test bed is promising to give a useful mean...
This paper presents a method with which to calculate the maximum scan error due to phase quantization in the visible region of dense phased arrays. The scan error is expressed as a function of the density ratio and the number of bits being used for digitization. A closed-form expression is derived with which the maximum scan error as well as the maximum scan range in the visible region of the array...
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