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In both wired and wireless networks, time synchronization is an important service for a wide range of applications in distributed systems. This includes radio interferometry. However, literature researches show that many distributed protocols cannot satisfy sub-ns time synchronization accuracy due to asymmetric delay errors, accumulated jitters and because of the strategy used to compute and adjust...
Differential front-end design presents a good prospect to be integrated with differential beamformer inputs without a transformer needed otherwise for a single-ended front-end design. A front-end solution with a complete differential configuration is presented. The potential advantages of this design are: planar antenna elements mean a lower cost; differential LNAs in close proximity to the antenna...
This paper proposes the design of a differential diplexer based on integrated active inductors with the QUBiC4Xi library which is a 0.25 µm SiGeC process of NXP. It is dedicated to dense aperture arrays for the radio astronomy project SKA (Square Kilometre Array). The proposed system allows transmitting digital data as control command type via a RF (radio frequency) cable and isolating digital and...
This paper proposed the design of a novel harmonic rejection system of digital control command. The system is based on integrated active inductors with the QUBiC4Xi library which is a 0.25 μm BiCMOS process of NXP. It is dedicated to the dense aperture array for the radio astronomy project SKA (Square Kilometre Array). The proposed system allows protecting the radio frequency (RF) signals against...
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