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In this work, the impact of different system configurations on the SNR performance of hybrid-passive-active phased arrays is studied. The separation of the functional core components of active arrays into active and passive parts provides the possibility to reduce power consumption, size and cost, which is of interest especially in mobile applications. Power consuming and expensive active components,...
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...
The efficiency of use of the parabolic reflector of a single offset reflector compact antenna test range (CATR) is affected largely by the illumination provided by the range feed and the reflector edge treatment. Thus, when these factors are taken together it is commonly found that the realized quiet zone (QZ) diameter is typically as little as 30% of the diameter of the reflector for the commonly...
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